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

`include "pronoc_def.v"

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

* Module: router_bypass

* Date:2020-11-24

* Author: alireza

*

* Description:

*   This file contains HDL modules that can be added

*   to a 2-stage NoC router and provides router bypassing

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

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

 * SMART_flags_gen:

 * generate SMART flags based on NoC parameter, current router's port and address,

 * and destination router address

 * located in router output port (port number:SPB_OPORT_NUM)

 * smart_flag_o indicates how many more router in direct line can be bypassed

 * if SPB_OPORT_NUM  is also one of the possible output port in

 * lk-ahead routing, The packet can by-pass the next router once the bypassing condition are met

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

`include "pronoc_def.v"

module reduction_or #(

        parameter W = 5,//out width

        parameter N = 4 //array lenght

)(

        in,

        out

);

    input  [W-1 : 0] in [N-1 : 0];

    output reg [W-1 : 0] out;

    // assign out = in.or(); //it is not synthesizable able by some compiler

        always_comb begin

                out = {W{1'b0}};

                for (int i = 0; i < N; i++)

                        out |=   in[i];

        end

endmodule

module onehot_mux_2D #(

                parameter W = 5,//out width

                parameter N = 4 //sel width

                )(

                in,

                sel,

                out

                );

        input  [W-1 : 0] in [N-1 : 0];

        input  [N-1 : 0] sel;

        output reg [W-1 : 0] out;

        always_comb begin

                out = {W{1'b0}};

                for (int i = 0; i < N; i++)

                        out |= (sel[i]) ?  in[i] :  {W{1'b0}};

        end

endmodule

module onehot_mux_1D #(

                parameter W = 5,//out width

                parameter N = 4 //sel width

        )(

                input  [W*N-1 : 0] in,

                input  [N-1 : 0] sel,

                output [W-1 : 0] out

        );

wire  [W-1 : 0] in_array [N-1 : 0];

genvar i;

generate

for (i=0;i

        assign in_array[i] = in[(i+1)*W-1 : i*W];

end

endgenerate

        onehot_mux_2D #(

                .W    (W),

                .N    (N)

                ) onehot_mux_2D (

                .in   (in_array),

                .sel  (sel),

                .out  (out));

endmodule

module onehot_mux_1D_reverse #(

                parameter W = 5,//out width  p

                parameter N = 4 //sel width  v

                )(

                input  [W*N-1 : 0] in,

                input  [N-1 : 0] sel,

                output [W-1 : 0] out

                );

        wire  [N-1 : 0] in_array [W-1 : 0];

        wire  [W-1 : 0] in_array2[N-1 : 0];

        genvar i,j;

        generate

                for (i=0;i

                        assign in_array[i] = in[(i+1)*N-1 : i*N];

                        for (j=0;j

                                assign in_array2[j][i] = in_array[i][j];

                        end

                end

        endgenerate

        onehot_mux_2D #(

                        .W    (N),

                        .N    (W)

                ) onehot_mux_2D (

                        .in   (in_array2),

                        .sel  (sel),

                        .out  (out));

endmodule

module header_flit_info #(

        parameter NOC_ID = 0,

        parameter DATA_w = 0

)(

        flit,

        hdr_flit,

        data_o

);

        `NOC_CONF

        localparam

        Dw = (DATA_w==0)? 1 : DATA_w;

        input flit_t flit;

        output hdr_flit_t hdr_flit;

        output [Dw-1 : 0] data_o;

        localparam

                DATA_LSB= MSB_BE+1,               DATA_MSB= (DATA_LSB + DATA_w)

                OFFSETw = DATA_MSB - DATA_LSB +1;

        wire [OFFSETw-1 : 0 ] offset;

        assign hdr_flit.src_e_addr  = flit.payload [E_SRC_MSB : E_SRC_LSB];

        assign hdr_flit.dest_e_addr = flit.payload [E_DST_MSB : E_DST_LSB];

        assign hdr_flit.destport    = flit.payload [DST_P_MSB : DST_P_LSB];

        generate

                if(C>1)begin : have_class

                        assign hdr_flit.message_class = flit.payload [CLASS_MSB : CLASS_LSB];

                end else begin : no_class

                        assign hdr_flit.message_class = {Cw{1'b0}};

                end

                /* verilator lint_off WIDTH */

                if(SWA_ARBITER_TYPE != "RRA")begin  : wrra_b

                /* verilator lint_on WIDTH */

                        assign hdr_flit.weight =  flit.payload [WEIGHT_MSB : WEIGHT_LSB];

                end else begin : rra_b

                        assign hdr_flit.weight = {WEIGHTw{1'bX}};

                end

                if( BYTE_EN) begin : be_1

                        assign hdr_flit.be = flit.payload [BE_MSB : BE_LSB];

                end else begin : be_0

                        assign hdr_flit.be = {BEw{1'bX}};

                end

                assign offset = flit.payload [DATA_MSB : DATA_LSB];

                if(Dw > OFFSETw) begin : if1

                        assign data_o={{(Dw-OFFSETw){1'b0}},offset};

                end else begin : if2

                        assign data_o=offset[Dw-1 : 0];

                end

        endgenerate

endmodule

//synthesis translate_off

//synopsys  translate_off

module smart_chanel_check #(

        parameter NOC_ID=0

) (

        flit_chanel,

        smart_chanel,

        reset,

        clk

);

        `NOC_CONF

        input flit_chanel_t  flit_chanel;

        input smart_chanel_t   smart_chanel;

        input reset,clk;

        smart_chanel_t   smart_chanel_delay;

        always @(posedge clk) smart_chanel_delay<=smart_chanel;

        hdr_flit_t hdr_flit;

        header_flit_info #(

                .NOC_ID (NOC_ID)

        ) extract (

                .flit(flit_chanel.flit),

                .hdr_flit(hdr_flit),

                .data_o()

        );

        always @(posedge clk) begin

                if(flit_chanel.flit_wr) begin

                        if(smart_chanel_delay.ovc!=flit_chanel.flit.vc) begin

                                $display("%t: ERROR: smart ovc %d is not equal with flit ovc %d. %m",$time,smart_chanel_delay.ovc,flit_chanel.flit.vc);

                                $finish;

                        end

                        if(flit_chanel.flit.hdr_flag==1'b1 &&   hdr_flit.dest_e_addr != smart_chanel_delay.dest_e_addr) begin

                                $display("%t: ERROR: smart dest_e_addr %d is not equal with flit dest_e_addr %d. %m",$time,smart_chanel_delay.dest_e_addr,hdr_flit.dest_e_addr);

                                $finish;

                        end

                        if(flit_chanel.flit.hdr_flag!=smart_chanel_delay.hdr_flit) begin

                                $display("%t: ERROR: smart and current hdr flag (%d!=%d) miss-match. %m",$time, smart_chanel_delay.hdr_flit, flit_chanel.flit.hdr_flag);

                                $finish;

                        end

                end

        end

endmodule

//synopsys  translate_on

//synthesis translate_on

module smart_forward_ivc_info #(

        parameter NOC_ID=0,

        parameter P=5

) (

        ivc_info,

        iport_info,

        oport_info,

        smart_chanel,

        ovc_locally_requested,

        reset,clk

);

        `NOC_CONF

        //ivc info

        input reset,clk;

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

        input  iport_info_t iport_info  [P-1 : 0];

        input  oport_info_t oport_info  [P-1 : 0];

        output smart_chanel_t smart_chanel  [P-1 : 0];

        output [V-1 : 0] ovc_locally_requested [P-1 : 0];

        smart_ivc_info_t  smart_ivc_info [P-1 : 0][V-1 : 0];

        smart_ivc_info_t  smart_ivc_mux  [P-1 : 0];

        smart_ivc_info_t  smart_ivc_info_all_port [P-1 : 0] [P-1 : 0];

        smart_ivc_info_t  smart_vc_info_o [P-1 : 0];

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

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

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

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

        /*

                                                P  V                   P                P  V   p

        non_assigned_vc_req[i][j] destport_one_hot[z]-->   [z][ j][i]

        non_assigned_vc_req[0][0] destport_one_hot[3]--> | [3][0] [0]

        non_assigned_vc_req[1][0] destport_one_hot[3]--> | [3][0] [1]

        non_assigned_vc_req[2][0] destport_one_hot[3]--> | [3][0] [2]

        */

        smart_chanel_t smart_chanel_next  [P-1 : 0];

        genvar i,j,z;

        generate

        for (i=0;i

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

                        assign smart_ivc_info[i][j].dest_e_addr = ivc_info[i][j].dest_e_addr;

                        assign smart_ivc_info[i][j].ovc_is_assigned= ivc_info[i][j].ovc_is_assigned;

                        assign smart_ivc_info[i][j].assigned_ovc_bin=ivc_info[i][j].assigned_ovc_bin;

                        assign non_assigned_vc_req[i][j] = ~ivc_info[i][j].ovc_is_assigned & ivc_info[i][j].ivc_req;

                        for (z=0; z < P; z=z+1) begin : port

                                assign mask_gen[z][j][i] = non_assigned_vc_req[i][j] & ivc_info[i][j].destport_one_hot[z];

                        end

                        assign ovc_locally_requested_next[i][j]=|mask_gen[i][j];

                end//V

                pronoc_register #(.W(V)) reg1 (.in(ovc_locally_requested_next[i]), .reset(reset), .clk(clk), .out(ovc_locally_requested[i]));

                onehot_mux_2D   #(.W(SMART_IVC_w),.N(V)) mux1 ( .in(smart_ivc_info[i]), .sel(iport_info[i].swa_first_level_grant), .out(smart_ivc_mux[i]));

                //demux

                for (j=0;j

                        assign smart_ivc_info_all_port[j][i] = (iport_info[i].granted_oport_one_hot[j]==1'b1)? smart_ivc_mux[i] : {SMART_IVC_w{1'b0}};

                end

                //assign smart_vc_info_o[i] = smart_ivc_info_all_port[i].or; not synthesizable

                // assign smart_vc_info_o[i] = smart_ivc_info_all_port[i].[0] | smart_ivc_info_all_port[i].[1] | smart_ivc_info_all_port[i].[2]  ... | smart_ivc_info_all_port[i].[p-1];

                reduction_or #(

                        .W    (SMART_IVC_w),

                        .N    (P)

                ) _or (

                        .in   (smart_ivc_info_all_port[i]),

                        .out  (smart_vc_info_o[i])

                );

                /*

                always_comb begin

                        smart_vc_info_o[i] = {SMART_IVC_w{1'b0}};

                        for (int ii = 0; ii < P; ii++)

                                smart_vc_info_o[i] |= smart_ivc_info_all_port[i][ii];

                end

                */

                bin_to_one_hot #(

                        .BIN_WIDTH      (Vw),

                        .ONE_HOT_WIDTH  (V)

                ) conv (

                        .bin_code       (smart_vc_info_o[i].assigned_ovc_bin),

                        .one_hot_code   (assigned_ovc[i])

                );

                assign smart_chanel_next[i].dest_e_addr= smart_vc_info_o[i].dest_e_addr;

                assign smart_chanel_next[i].ovc= (smart_vc_info_o[i].ovc_is_assigned)? assigned_ovc[i] : oport_info[i].non_smart_ovc_is_allocated;

                assign smart_chanel_next[i].hdr_flit=~smart_vc_info_o[i].ovc_is_assigned;

                assign smart_chanel_next[i].requests = (oport_info[i].any_ovc_granted)? {SMART_NUM{1'b1}}:{SMART_NUM{1'b0}} ;

                assign smart_chanel_next[i].bypassed_num = {BYPASSw{1'b0}} ;

                if( ADD_PIPREG_AFTER_CROSSBAR == 1) begin :link_reg

                        pronoc_register #(

                                .W      ( SMART_CHANEL_w)

                                ) register (

                                .in     (smart_chanel_next[i]),

                                .reset  (reset),

                                .clk    (clk),

                                .out    (smart_chanel[i]));

                end else begin :no_link_reg

                                assign smart_chanel[i] = smart_chanel_next[i];

                end

                /*

                        always @ (`pronoc_clk_reset_edge)begin

                                if(`pronoc_reset) begin

                                        smart_chanel[i].dest_e_addr<= {EAw{1'b0}};

                                        smart_chanel[i].ovc<= {V{1'b0}};

                                        smart_chanel[i].hdr_flit<=1'b0;

                                end else begin

                                        smart_chanel[i].dest_e_addr<= smart_vc_info_o[i].dest_e_addr;

                                        smart_chanel[i].ovc<= (smart_vc_info_o[i].ovc_is_assigned)? assigned_ovc[i] : oport_info[i].non_smart_ovc_is_allocated;

                                        smart_chanel[i].hdr_flit<=~smart_vc_info_o[i].ovc_is_assigned;

                                        smart_chanel[i].requests <= (oport_info[i].any_ovc_granted)? {SMART_NUM{1'b1}}:{SMART_NUM{1'b0}} ;

                                end

                        end

                */

                end//port_

                endgenerate

//      generate for (i=0; i < P; i=i+1) begin : port

//                      assign smart_ivc_info_o[i] = (granted_dest_port[i]==1'b1)? ivc_info_mux : {SMART_IVC_w{1'b0}};

//              end endgenerate

endmodule

module smart_bypass_chanels #(

        parameter NOC_ID=0,

        parameter P=5

) (

        ivc_info,

        iport_info,

        oport_info,

        smart_chanel_new,

        smart_chanel_in,

        smart_chanel_out,

        smart_req,

        reset,

        clk

);

        `NOC_CONF

        input reset,clk;

        input smart_chanel_t smart_chanel_new  [P-1 : 0];

        input smart_chanel_t smart_chanel_in   [P-1 : 0];

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

        input iport_info_t iport_info  [P-1 : 0];

        input oport_info_t oport_info  [P-1 : 0];

        output [P-1 : 0] smart_req;

        output smart_chanel_t smart_chanel_out   [P-1 : 0];

        smart_chanel_t smart_chanel_shifted  [P-1 : 0];

        localparam DISABLE = P;

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

        wire [P-1 :0] smart_forwardable;

        logic [P-1 :0] outport_is_granted;

        reg [P-1 : 0] rq;

        genvar i;

        generate

        for (i=0;i

                /* verilator lint_off WIDTH */

                assign ivc_forwardable[i] =  (PCK_TYPE == "SINGLE_FLIT")?  1'b1 :~iport_info[i].ivc_req;

                /* verilator lint_on WIDTH */

                if( ADD_PIPREG_AFTER_CROSSBAR == 1) begin :link_reg

                always @( posedge clk)begin

                    outport_is_granted[i] <= oport_info[i].any_ovc_granted;

                end

                end else begin

                        assign outport_is_granted[i] = oport_info[i].any_ovc_granted;

                end

                localparam SS_PORT = strieght_port (P,i); // the straight port number

                if(SS_PORT != DISABLE) begin: ssp

                        //smart_chanel_shifter

                        assign smart_forwardable[i] = |  (ivc_forwardable[i] & smart_chanel_in[i].ovc);

                        always @(*) begin

                                smart_chanel_shifted[i] = smart_chanel_in [i];

                                {smart_chanel_shifted[i].requests,rq[i]} =(smart_forwardable[i])? {1'b0,smart_chanel_in[i].requests}:{{SMART_NUM{1'b0}},smart_chanel_in[i].requests[0]};

                                smart_chanel_shifted[i].bypassed_num =   smart_chanel_in [i].bypassed_num +1'b1;

                        end

                        assign smart_req[i]=rq[i];

                        // mux out smart chanel

                        assign smart_chanel_out[i] = (outport_is_granted[i])? smart_chanel_new[i] : smart_chanel_shifted[SS_PORT];

                end else begin

                        assign {smart_chanel_shifted[i].requests,smart_req[i]} = {(SMART_NUM+1){1'b0}};

                        assign smart_chanel_out[i] = {SMART_CHANEL_w{1'b0}};

                end

        end

        endgenerate

endmodule

module check_straight_oport #(

                parameter TOPOLOGY          =   "MESH",

                parameter ROUTE_NAME        =   "XY",

                parameter ROUTE_TYPE        =   "DETERMINISTIC",

                parameter DSTPw             =   4,

                parameter SS_PORT_LOC     =   1

                )(

                destport_coded_i,

                goes_straight_o

                );

        input   [DSTPw-1 : 0] destport_coded_i;

        output  goes_straight_o;

        generate

        /* verilator lint_off WIDTH */

                if(TOPOLOGY == "MESH" || TOPOLOGY == "TORUS" || TOPOLOGY =="FMESH") begin :twoD

                        /* verilator lint_on WIDTH */

                        if (SS_PORT_LOC == 0 || SS_PORT_LOC > 4) begin : local_ports

                                assign goes_straight_o = 1'b0; // There is not a next router in this case at all

                        end

                        else begin :non_local

                                wire [4 : 0 ] destport_one_hot;

                                mesh_tori_decode_dstport decoder(

                                                .dstport_encoded(destport_coded_i),

                                                .dstport_one_hot(destport_one_hot)

                                        );

                                assign goes_straight_o = destport_one_hot [SS_PORT_LOC];

                        end//else

                end//mesh_tori

                /* verilator lint_off WIDTH */

                else if(TOPOLOGY ==  "RING" || TOPOLOGY ==  "LINE") begin :oneD

                        /* verilator lint_on WIDTH */

                        if (SS_PORT_LOC == 0 || SS_PORT_LOC > 2) begin : local_ports

                                assign goes_straight_o = 1'b0; // There is not a next router in this case at all

                        end

                        else begin :non_local

                                wire [2: 0 ] destport_one_hot;

                                line_ring_decode_dstport decoder(

                                                .dstport_encoded(destport_coded_i),

                                                .dstport_one_hot(destport_one_hot)

                                        );

                                assign goes_straight_o = destport_one_hot [SS_PORT_LOC];

                        end     //non_local

                end// oneD

                //TODO Add fattree & custom

        endgenerate

endmodule

module smart_validity_check_per_ivc  #(

        parameter NOC_ID=0,

        parameter IVC_NUM = 0

) (

        reset,

        clk,

        //smart channel

        goes_straight ,

        smart_requests_i,

        smart_ivc_i,

        smart_hdr_flit,

        //flit

        flit_hdr_flag_i,

        flit_tail_flag_i,

        flit_wr_i,

        //router ivc status

        ovc_locally_requested,

        assigned_to_ss_ovc,

        assigned_ovc_not_full,

        ovc_is_assigned,

        ivc_request,

        //ss port status

        ss_ovc_avalable_in_ss_port,

        ss_port_link_reg_flit_wr,

        ss_ovc_crossbar_wr,

        //output

        smart_single_flit_pck_o,

        smart_ivc_smart_en_o,

        smart_credit_o,

        smart_buff_space_decreased_o,

        smart_ss_ovc_is_allocated_o,

        smart_ss_ovc_is_released_o,

        smart_mask_available_ss_ovc_o,

        smart_ivc_num_getting_ovc_grant_o,

        smart_ivc_reset_o,

        smart_ivc_granted_ovc_num_o

);

        `NOC_CONF

        input reset, clk;

        //smart channel

        input goes_straight,

        smart_requests_i,

        smart_ivc_i,

        smart_hdr_flit,

        //flit

        flit_hdr_flag_i ,

        flit_tail_flag_i,

        flit_wr_i,

        //router ivc status

        ovc_locally_requested,

        assigned_to_ss_ovc,

        assigned_ovc_not_full,

        ovc_is_assigned,

        ivc_request,

        //ss port status

        ss_ovc_avalable_in_ss_port,

        ss_ovc_crossbar_wr,

        ss_port_link_reg_flit_wr;

//output

output

        smart_single_flit_pck_o ,

        smart_ivc_smart_en_o,

        smart_credit_o,

        smart_buff_space_decreased_o,

        smart_ss_ovc_is_allocated_o,

        smart_ss_ovc_is_released_o,

        smart_ivc_num_getting_ovc_grant_o,

        smart_ivc_reset_o,

        smart_mask_available_ss_ovc_o;

output reg [V-1 : 0] smart_ivc_granted_ovc_num_o;

always @(*) begin

        smart_ivc_granted_ovc_num_o={V{1'b0}};

        smart_ivc_granted_ovc_num_o[IVC_NUM]=smart_ivc_num_getting_ovc_grant_o;

end

wire  smart_req_valid_next  = smart_requests_i &  smart_ivc_i & goes_straight;

logic smart_req_valid;

wire  smart_hdr_flit_req_next = smart_req_valid_next  & smart_hdr_flit;

logic smart_hdr_flit_req;

pronoc_register #(.W(1)) req1 (.in(smart_req_valid_next), .reset(reset), .clk(clk), .out(smart_req_valid));

pronoc_register #(.W(1)) req2 (.in(smart_hdr_flit_req_next), .reset(reset), .clk(clk), .out(smart_hdr_flit_req));

// condition1: new smart vc allocation condition

wire hdr_flit_condition    = ~ovc_locally_requested & ss_ovc_avalable_in_ss_port;

wire nonhdr_flit_condition = assigned_to_ss_ovc & assigned_ovc_not_full;

wire condition1 =

        /* verilator lint_off WIDTH */

        (PCK_TYPE == "SINGLE_FLIT")?  hdr_flit_condition :

        /* verilator lint_on WIDTH */

        (ovc_is_assigned)? nonhdr_flit_condition : hdr_flit_condition;

wire condition2;

generate

/* verilator lint_off WIDTH */

wire non_empty_ivc_condition =(PCK_TYPE == "SINGLE_FLIT")?  1'b0 :ivc_request;

/* verilator lint_on WIDTH */

if( ADD_PIPREG_AFTER_CROSSBAR == 1) begin :link_reg

        assign condition2= ~(non_empty_ivc_condition | ss_port_link_reg_flit_wr| ss_ovc_crossbar_wr);

end else begin : no_link_reg

        assign condition2= ~(non_empty_ivc_condition | ss_port_link_reg_flit_wr); // ss_port_link_reg_flit_wr are identical with ss_ovc_crossbar_wr when there is no link reg

end

endgenerate

wire conditions_met = condition1 & condition2;

assign smart_ivc_smart_en_o = conditions_met & smart_req_valid;

assign smart_single_flit_pck_o     =

        /* verilator lint_off WIDTH */

        (PCK_TYPE == "SINGLE_FLIT")? 1'b1 :

        /* verilator lint_on WIDTH */

        (MIN_PCK_SIZE==1)?  flit_tail_flag_i & flit_hdr_flag_i : 1'b0;

assign smart_buff_space_decreased_o =  smart_ivc_smart_en_o & flit_wr_i ;

assign smart_ivc_num_getting_ovc_grant_o  =  smart_buff_space_decreased_o & !ovc_is_assigned  & flit_hdr_flag_i;

assign smart_ivc_reset_o   =  smart_buff_space_decreased_o & flit_tail_flag_i;

assign smart_ss_ovc_is_released_o = smart_ivc_reset_o & ~smart_single_flit_pck_o;

assign smart_ss_ovc_is_allocated_o = smart_ivc_num_getting_ovc_grant_o & ~smart_single_flit_pck_o;

//mask the available SS OVC for local requests allocation if the following conditions met

assign smart_mask_available_ss_ovc_o = smart_hdr_flit_req & ~ovc_locally_requested & condition2;

pronoc_register #(.W(1)) credit(.in(smart_buff_space_decreased_o), .reset(reset), .clk(clk), .out(smart_credit_o));

endmodule

module smart_allocator_per_iport # (

        parameter NOC_ID=0,

        parameter P=5,

        parameter SW_LOC=0,

        parameter SS_PORT_LOC=1

) (

        //general

        clk,

        reset,

        current_r_addr_i,

        neighbors_r_addr_i,

        //smart_chanel & flit in

        smart_chanel_i,

        flit_chanel_i,

        //router status signals

        ivc_info,

        ss_ovc_info,

        ovc_locally_requested,//make sure no conflict is existed between local & SMART VC allocation

        ss_port_link_reg_flit_wr,

        ss_smart_chanel_new,

        //output

        smart_destport_o,

        smart_lk_destport_o,

        smart_ivc_smart_en_o,

        smart_credit_o,

        smart_buff_space_decreased_o,

        smart_ss_ovc_is_allocated_o,

        smart_ss_ovc_is_released_o,

        smart_ivc_num_getting_ovc_grant_o,

        smart_ivc_reset_o,

        smart_mask_available_ss_ovc_o,

        smart_hdr_flit_req_o,

        smart_ivc_granted_ovc_num_o,

        smart_ivc_single_flit_pck_o,

        smart_ovc_single_flit_pck_o

);

        `NOC_CONF

        //general

        input clk, reset;

        input [RAw-1   :0]  current_r_addr_i;

        input [RAw-1:  0]  neighbors_r_addr_i [P-1 : 0];

        //channels

        input smart_chanel_t smart_chanel_i;

        input flit_chanel_t flit_chanel_i;

        //ivc

        input ivc_info_t ivc_info [V-1 : 0];

        input [V-1 : 0] ovc_locally_requested;

        //ss port

        input ovc_info_t   ss_ovc_info [V-1 : 0];

        input ss_port_link_reg_flit_wr;

        input smart_chanel_t ss_smart_chanel_new;

        //output

        output [DSTPw-1 : 0] smart_destport_o,smart_lk_destport_o;

        output smart_hdr_flit_req_o;

        output [V-1 : 0]

                smart_ivc_smart_en_o,

                smart_credit_o,

                smart_buff_space_decreased_o,

                smart_ss_ovc_is_allocated_o,

                smart_ss_ovc_is_released_o,

                smart_mask_available_ss_ovc_o,

                smart_ivc_num_getting_ovc_grant_o,

                smart_ivc_reset_o,

                smart_ivc_single_flit_pck_o,

                smart_ovc_single_flit_pck_o;

        output [V*V-1 : 0] smart_ivc_granted_ovc_num_o;

        assign smart_ovc_single_flit_pck_o = smart_ivc_single_flit_pck_o;

        wire  [DSTPw-1  :   0]  destport,lkdestport;

        wire  goes_straight;

        /* verilator lint_off WIDTH */

        localparam  LOCATED_IN_NI=

                (TOPOLOGY=="RING" || TOPOLOGY=="LINE") ? (SW_LOC == 0 || SW_LOC>2) :

                (TOPOLOGY =="MESH" || TOPOLOGY=="TORUS" || TOPOLOGY == "FMESH")? (SW_LOC == 0 || SW_LOC>4) : 0;

        /* verilator lint_on WIDTH */

        // does the route computation for the current router

        conventional_routing #(

                .NOC_ID          (NOC_ID),

                .TOPOLOGY        (TOPOLOGY),

                .ROUTE_NAME      (ROUTE_NAME),

                .ROUTE_TYPE      (ROUTE_TYPE),

                .T1              (T1),

                .T2              (T2),

                .T3              (T3),

                .RAw             (RAw),

                .EAw             (EAw),

                .DSTPw           (DSTPw),

                .LOCATED_IN_NI   (LOCATED_IN_NI)

        ) routing (

                .reset           (reset),

                .clk             (clk),

                .current_r_addr  (current_r_addr_i),

                .src_e_addr      (                      ),// needed only for custom routing

                .dest_e_addr     (smart_chanel_i.dest_e_addr),

                .destport        (destport)

        );

        pronoc_register #(.W(DSTPw)) reg1 (.in(destport), .reset(reset), .clk(clk), .out(smart_destport_o));

        check_straight_oport #(

                .TOPOLOGY      ( TOPOLOGY),

                .ROUTE_NAME    ( ROUTE_NAME),

                .ROUTE_TYPE    ( ROUTE_TYPE),

                .DSTPw         ( DSTPw),

                .SS_PORT_LOC   ( SS_PORT_LOC)

        ) check_straight (

                .destport_coded_i (destport),

                .goes_straight_o  (goes_straight)

        );

        //look ahead routing. take straight next router address as input

        conventional_routing #(

                        .NOC_ID(NOC_ID),

                        .TOPOLOGY        (TOPOLOGY),

                        .ROUTE_NAME      (ROUTE_NAME),

                        .ROUTE_TYPE      (ROUTE_TYPE),

                        .T1              (T1),

                        .T2              (T2),

                        .T3              (T3),

                        .RAw             (RAw),

                        .EAw             (EAw),

                        .DSTPw           (DSTPw),

                        .LOCATED_IN_NI   (LOCATED_IN_NI)

                ) lkrouting (

                        .reset           (reset),

                        .clk             (clk),

                        .current_r_addr  (neighbors_r_addr_i[SS_PORT_LOC]),

                        .src_e_addr      (                      ),// needed only for custom routing

                        .dest_e_addr     (smart_chanel_i.dest_e_addr),

                        .destport        (lkdestport)

                );

        pronoc_register #(.W(DSTPw)) reg2 (.in(lkdestport), .reset(reset), .clk(clk), .out(smart_lk_destport_o));

        wire [V-1 : 0] ss_ovc_crossbar_wr;//If asserted, a flit will be injected to ovc at next clk cycle

        assign ss_ovc_crossbar_wr = (ss_smart_chanel_new.requests[0]) ? ss_smart_chanel_new.ovc : {V{1'b0}};

        //assign smart_ivc_num_getting_ovc_grant_o = smart_ss_ovc_is_allocated_o;

        //assign smart_ivc_reset_o = smart_ss_ovc_is_released_o;

        genvar i,j;

        generate

        for (i=0;i

                smart_validity_check_per_ivc #(

                        .NOC_ID(NOC_ID),

                        .IVC_NUM(i)

                ) validity_check (

                        .reset                       (reset),

                        .clk                         (clk),

                        .goes_straight                           (goes_straight),

                        .smart_requests_i              (smart_chanel_i.requests[0]              ),

                        .smart_ivc_i                   (smart_chanel_i.ovc  [i]                 ),

                        .smart_hdr_flit                          (smart_chanel_i.hdr_flit),

                        .flit_hdr_flag_i                (flit_chanel_i.flit.hdr_flag),

                        .flit_tail_flag_i               (flit_chanel_i.flit.tail_flag),

                        .flit_wr_i                      (flit_chanel_i.flit_wr),

                        .ovc_locally_requested      (ovc_locally_requested[i]   ),

                        .assigned_to_ss_ovc          (ivc_info[i].assigned_ovc_num[i]),

                        .assigned_ovc_not_full       (~ss_ovc_info[i].full),

                        .ovc_is_assigned             (ivc_info[i].ovc_is_assigned),

                        .ivc_request                 (ivc_info[i].ivc_req       ),

                        .ss_ovc_avalable_in_ss_port  (ss_ovc_info[i].avalable),

                        .ss_port_link_reg_flit_wr    (ss_port_link_reg_flit_wr),

                        .ss_ovc_crossbar_wr          (ss_ovc_crossbar_wr[i]),

                        .smart_single_flit_pck_o       (smart_ivc_single_flit_pck_o[i]),

                        .smart_ivc_smart_en_o                    (smart_ivc_smart_en_o[i]       ),

                        .smart_credit_o                  (smart_credit_o[i]),

                        .smart_buff_space_decreased_o  (smart_buff_space_decreased_o[i]),

                        .smart_ss_ovc_is_allocated_o   (smart_ss_ovc_is_allocated_o[i]),

                        .smart_ss_ovc_is_released_o    (smart_ss_ovc_is_released_o[i]),

                        .smart_mask_available_ss_ovc_o (smart_mask_available_ss_ovc_o[i]),

                        .smart_ivc_num_getting_ovc_grant_o(smart_ivc_num_getting_ovc_grant_o[i]),

                        .smart_ivc_reset_o                       (smart_ivc_reset_o[i]),

                        .smart_ivc_granted_ovc_num_o   (smart_ivc_granted_ovc_num_o[(i+1)*V-1 : i*V])

                );

        end//for

        endgenerate

        pronoc_register #(.W(1)) reg3 (.in(smart_chanel_i.hdr_flit), .reset(reset), .clk(clk), .out(smart_hdr_flit_req_o));

endmodule

//

module smart_credit_manage #(

        parameter V=4,

        parameter B=2

        )(

                credit_in,

                smart_credit_in,

                credit_out,

                reset,

                clk

        );

        localparam Bw=$clog2(B);

        input [V-1 : 0]  credit_in, smart_credit_in;

        input reset,    clk;

        output [V-1 : 0]  credit_out;

        genvar i;