lke_cam_part.v

`timescale 1ns / 1ps

module lke_cam_part #(
    parameter C_S_AXIS_DATA_WIDTH = 512,
    parameter C_S_AXIS_TUSER_WIDTH = 128,
    parameter STAGE_ID = 0,
    parameter PHV_LEN = 48*8+32*8+16*8+256,
    parameter KEY_LEN = 48*2+32*2+16*2+5,
    parameter ACT_LEN = 625,
    parameter LOOKUP_ID = 2,
	parameter C_VLANID_WIDTH = 12
)
(
    input clk,
    input rst_n,

    //output from key extractor
    input [KEY_LEN-1:0]           extract_key,
    input                         key_valid,
	input 					      phv_valid,
    input [PHV_LEN-1:0]           phv_in,
	output										ready_out,

    // output to the ram part
	output reg [PHV_LEN-1:0]					phv_out,
	output reg									phv_out_valid,
	output reg [3:0]							match_addr_out,
	output reg									if_match,
	input										ready_in,

    //control path
    input [C_S_AXIS_DATA_WIDTH-1:0]			    c_s_axis_tdata,
	input [C_S_AXIS_TUSER_WIDTH-1:0]		    c_s_axis_tuser,
	input [C_S_AXIS_DATA_WIDTH/8-1:0]		    c_s_axis_tkeep,
	input									    c_s_axis_tvalid,
	input									    c_s_axis_tlast,

    output reg [C_S_AXIS_DATA_WIDTH-1:0]		c_m_axis_tdata,
	output reg [C_S_AXIS_TUSER_WIDTH-1:0]		c_m_axis_tuser,
	output reg [C_S_AXIS_DATA_WIDTH/8-1:0]		c_m_axis_tkeep,
	output reg 								    c_m_axis_tvalid,
	output reg 							    	c_m_axis_tlast

);

/********intermediate variables declared here********/
wire [3:0]		match_addr;
wire			match;

reg [PHV_LEN-1:0] phv_reg;
reg [2:0] lookup_state;

wire [11:0] vlan_id;

assign vlan_id = phv_in[140:129];

wire [204:0] dbg_input;

assign dbg_input = {vlan_id[3:0], vlan_id[11:4], extract_key};

/********intermediate variables declared here********/

//here, the output should be controlled.
localparam IDLE_S = 3'd0,
           WAIT1_S = 3'd1,
           WAIT2_S = 3'd2,
           TRANS_S = 3'd3,
		   HALT_S = 3'd4,
		   EMPTY1_S = 3'd5,
		   OUTPUT_S = 3'd6;

assign ready_out = lookup_state!=HALT_S;

always @(posedge clk or negedge rst_n) begin

    if (~rst_n) begin
        phv_reg <= 0;
        lookup_state <= IDLE_S;

        phv_out <= 0;
		phv_out_valid <= 0;
		match_addr_out <= 0;
		if_match <= 0;

		// ready_out <= 1'b1;
    end

    else begin
        case(lookup_state)
            IDLE_S: begin
                if (key_valid == 1'b1) begin
					// ready_out <= 1'b0;
                    phv_reg <= phv_in;
                    lookup_state <= WAIT1_S;
                end
                else begin
					phv_out_valid <= 0;
					if_match <= 0;
					// ready_out <= 1'b1;
                    lookup_state <= IDLE_S;
                end
            end

            WAIT1_S: begin
				if (ready_in) begin
					phv_out <= phv_reg;
					phv_out_valid <= 1'b1;

					if(match == 1'b0) begin // CAM miss
						if_match <= 0;
						match_addr_out <= 4'hf;
                	end
                	else begin // CAM hit
						if_match <= 1;
						match_addr_out <= match_addr;
                	end
                	lookup_state <= IDLE_S;
					// ready_out <= 1'b1;
				end
				else begin
					lookup_state <= HALT_S;
				end
            end
			HALT_S: begin
				if (ready_in) begin
					phv_out <= phv_reg;
					phv_out_valid <= 1'b1;

					if(match == 1'b0) begin // CAM miss
						if_match <= 0;
						match_addr_out <= 4'hf;
                	end
                	else begin // CAM hit
						if_match <= 1;
						match_addr_out <= match_addr;
                	end
                	lookup_state <= IDLE_S;
					// ready_out <= 1'b1;
				end
			end
        endcase
    end
end

//======================================================================



//======================================================================
/****control path*****/
wire [7:0]          mod_id; //module ID
//4'b0 for tcam entry;
//NOTE: we don't need tcam entry mask
//4'b2 for action table entry;
wire [3:0]          resv; //recog between tcam and action
wire [15:0]         control_flag; //dst udp port num


reg  [7:0]          c_index_cam; //table index(addr)

reg                 c_wr_en_cam; //enable table write(wena)

reg  [7:0]          c_index_act;
reg                 c_wr_en_act;
reg  [ACT_LEN-1:0]  act_entry_tmp;             
reg                 continous_flag;
reg [204:0]         cam_entry_reg;


reg [2:0]           c_state;

/****for 256b exclusively*****/
reg                                 c_m_axis_tvalid_r;
reg                                 c_m_axis_tlast_r;


localparam IDLE_C = 0,
           PARSE_C = 1,
           CAM_TMP_ENTRY = 2,
           SU_CAM_TMP_ENTRY = 3,
           ACT_TMP_ENTRY_WAIT = 4,
           ACT_TMP_ENTRY_WAIT_2 = 5,
           ACT_TMP_ENTRY = 6,
		   FLUSH_REST_C = 7;

generate 
    if(C_S_AXIS_DATA_WIDTH == 512) begin
        assign mod_id = c_s_axis_tdata[368+:8];
        assign resv   = c_s_axis_tdata[376+:4];
        assign control_flag = c_s_axis_tdata[335:320];
        //LE to BE switching
        wire[C_S_AXIS_DATA_WIDTH-1:0] c_s_axis_tdata_swapped;

		assign c_s_axis_tdata_swapped = {	c_s_axis_tdata[0+:8],
											c_s_axis_tdata[8+:8],
											c_s_axis_tdata[16+:8],
											c_s_axis_tdata[24+:8],
											c_s_axis_tdata[32+:8],
											c_s_axis_tdata[40+:8],
											c_s_axis_tdata[48+:8],
											c_s_axis_tdata[56+:8],
											c_s_axis_tdata[64+:8],
											c_s_axis_tdata[72+:8],
											c_s_axis_tdata[80+:8],
											c_s_axis_tdata[88+:8],
											c_s_axis_tdata[96+:8],
											c_s_axis_tdata[104+:8],
											c_s_axis_tdata[112+:8],
											c_s_axis_tdata[120+:8],
											c_s_axis_tdata[128+:8],
											c_s_axis_tdata[136+:8],
											c_s_axis_tdata[144+:8],
											c_s_axis_tdata[152+:8],
											c_s_axis_tdata[160+:8],
											c_s_axis_tdata[168+:8],
											c_s_axis_tdata[176+:8],
											c_s_axis_tdata[184+:8],
											c_s_axis_tdata[192+:8],
											c_s_axis_tdata[200+:8],
											c_s_axis_tdata[208+:8],
											c_s_axis_tdata[216+:8],
											c_s_axis_tdata[224+:8],
											c_s_axis_tdata[232+:8],
											c_s_axis_tdata[240+:8],
											c_s_axis_tdata[248+:8],
                                            c_s_axis_tdata[256+:8],
                                            c_s_axis_tdata[264+:8],
                                            c_s_axis_tdata[272+:8],
                                            c_s_axis_tdata[280+:8],
                                            c_s_axis_tdata[288+:8],
                                            c_s_axis_tdata[296+:8],
                                            c_s_axis_tdata[304+:8],
                                            c_s_axis_tdata[312+:8],
                                            c_s_axis_tdata[320+:8],
                                            c_s_axis_tdata[328+:8],
                                            c_s_axis_tdata[336+:8],
                                            c_s_axis_tdata[344+:8],
                                            c_s_axis_tdata[352+:8],
                                            c_s_axis_tdata[360+:8],
                                            c_s_axis_tdata[368+:8],
                                            c_s_axis_tdata[376+:8],
                                            c_s_axis_tdata[384+:8],
                                            c_s_axis_tdata[392+:8],
                                            c_s_axis_tdata[400+:8],
                                            c_s_axis_tdata[408+:8],
                                            c_s_axis_tdata[416+:8],
                                            c_s_axis_tdata[424+:8],
                                            c_s_axis_tdata[432+:8],
                                            c_s_axis_tdata[440+:8],
                                            c_s_axis_tdata[448+:8],
                                            c_s_axis_tdata[456+:8],
                                            c_s_axis_tdata[464+:8],
                                            c_s_axis_tdata[472+:8],
                                            c_s_axis_tdata[480+:8],
                                            c_s_axis_tdata[488+:8],
                                            c_s_axis_tdata[496+:8],
                                            c_s_axis_tdata[504+:8]
                                            };
        always @(posedge clk or negedge rst_n) begin
            if(~rst_n) begin
                c_index_cam <= 0;
                c_wr_en_cam <= 0;

                c_index_act <= 0;
                c_wr_en_act <= 0;

                act_entry_tmp <= 0;
                cam_entry_reg <= 0;
                continous_flag <= 0;

                c_m_axis_tdata <= 0;
                c_m_axis_tuser <= 0;
                c_m_axis_tkeep <= 0;
                c_m_axis_tvalid <= 0;
                c_m_axis_tlast <= 0;

                c_state <= IDLE_C;

            end

            else begin
                case(c_state)
                    IDLE_C: begin
                        if(c_s_axis_tvalid) begin
                            if(mod_id[7:3] == STAGE_ID && mod_id[2:0] == LOOKUP_ID 
									&& control_flag == 16'hf2f1
									&& resv == 4'b0) begin // TCAM entry
                                c_wr_en_cam <= 1'b0;
                                c_index_cam <= c_s_axis_tdata[384+:8];
                                c_state <= CAM_TMP_ENTRY;
                            end
                            //not for lookup
                            else begin
                                c_index_cam <= 0;
                                c_wr_en_cam <= 0;

                                c_index_act <= 0;
                                c_wr_en_act <= 0;

                                act_entry_tmp <= 0;
                                continous_flag <= 0;

                                c_m_axis_tdata <= c_s_axis_tdata;
                                c_m_axis_tuser <= c_s_axis_tuser;
                                c_m_axis_tkeep <= c_s_axis_tkeep;
                                c_m_axis_tvalid <= c_s_axis_tvalid;
                                c_m_axis_tlast <= c_s_axis_tlast;

                                c_state <= IDLE_C;
                            end
                        end
                        //stay halt
                        else begin
                            c_index_cam <= 0;
                            c_wr_en_cam <= 0;

                            c_index_act <= 0;
                            c_wr_en_act <= 0;

                            act_entry_tmp <= 0;
                            continous_flag <= 0;

                            c_m_axis_tdata <= 0;
                            c_m_axis_tuser <= 0;
                            c_m_axis_tkeep <= 0;
                            c_m_axis_tvalid <= 0;
                            c_m_axis_tlast <= 0;

                            c_state <= IDLE_C;
                        end
                    end

                    CAM_TMP_ENTRY: begin
                        if(c_s_axis_tvalid) begin
                            cam_entry_reg <= c_s_axis_tdata_swapped[511 -: 205];
                            c_wr_en_cam <= 1'b1;
                            if(c_s_axis_tlast) begin
                                c_state <= IDLE_C;
                            end
                            else begin
                                c_state <= SU_CAM_TMP_ENTRY;
                            end
                        end
                        else begin
                            c_wr_en_cam <= 1'b0;
                        end
                    end

                    SU_CAM_TMP_ENTRY: begin
                        if(c_s_axis_tvalid) begin
                            cam_entry_reg <= c_s_axis_tdata_swapped[511 -: 205];
                            c_wr_en_cam <= 1'b1;
                            c_index_cam <= c_index_cam + 1'b1;
                            if(c_s_axis_tlast) begin
                                c_state <= IDLE_C;
                            end
                            else begin
                                c_state <= SU_CAM_TMP_ENTRY;
                            end
                        end
                        else begin
                            c_wr_en_cam <= 1'b0;
                        end
                    end
                endcase
            end
        end

		if (STAGE_ID == 4) begin
			// tcam1 for lookup
        	cam_top # ( 
        	    .C_DEPTH			(16),
        	    // .C_WIDTH			(256),
        	    .C_WIDTH			(205),
        	    .C_MEM_INIT			(0)
        	    // .C_MEM_INIT_FILE	("./cam_init_file.mif")
        	)
        	cam_0
        	(
        	    .CLK				(clk),
        	    .CMP_DIN			({vlan_id[3:0], vlan_id[11:4], extract_key}),
        	    //.CMP_DATA_MASK		({4'b1111, extract_mask}),
        	    .CMP_DATA_MASK      (),
				.BUSY				(),
        	    .MATCH				(match),
        	    .MATCH_ADDR			(match_addr[3:0]),

        	    //.WE				(lookup_din_en),
        	    //.WR_ADDR			(lookup_din_addr),
        	    //.DATA_MASK		(lookup_din_mask),  
        	    //.DIN				(lookup_din),

        	    .WE                 (c_wr_en_cam),
        	    .WR_ADDR            (c_index_cam[3:0]),
        	    .DATA_MASK          (),  //TODO do we need ternary matching?
        	    .DIN                (cam_entry_reg),
        	    .EN					(1'b1)
        	);
		end
		else begin
			// tcam1 for lookup
        	cam_top # ( 
        	    .C_DEPTH			(16),
        	    // .C_WIDTH			(256),
        	    .C_WIDTH			(205),
        	    .C_MEM_INIT			(0)
        	    // .C_MEM_INIT_FILE	("./cam_init_file.mif")
        	)
        	cam_0
        	(
        	    .CLK				(clk),
        	    .CMP_DIN			({vlan_id[3:0], vlan_id[11:4], extract_key}),
        	    //.CMP_DATA_MASK		({4'b0000, extract_mask}),
        	    .CMP_DATA_MASK      (),
        	    .BUSY				(),
        	    .MATCH				(match),
        	    .MATCH_ADDR			(match_addr[3:0]),

        	    //.WE				(lookup_din_en),
        	    //.WR_ADDR			(lookup_din_addr),
        	    //.DATA_MASK		(lookup_din_mask),  
        	    //.DIN				(lookup_din),

        	    .WE                 (c_wr_en_cam),
        	    .WR_ADDR            (c_index_cam[3:0]),
        	    .DATA_MASK          (),  //TODO do we need ternary matching?
        	    .DIN                (cam_entry_reg),
        	    .EN					(1'b1)
        	);
		end
    end
    //NOTE: data width is 256b
    else begin
		wire[C_S_AXIS_DATA_WIDTH-1:0] c_s_axis_tdata_swapped;
		assign c_s_axis_tdata_swapped = {	c_s_axis_tdata[0+:8],
											c_s_axis_tdata[8+:8],
											c_s_axis_tdata[16+:8],
											c_s_axis_tdata[24+:8],
											c_s_axis_tdata[32+:8],
											c_s_axis_tdata[40+:8],
											c_s_axis_tdata[48+:8],
											c_s_axis_tdata[56+:8],
											c_s_axis_tdata[64+:8],
											c_s_axis_tdata[72+:8],
											c_s_axis_tdata[80+:8],
											c_s_axis_tdata[88+:8],
											c_s_axis_tdata[96+:8],
											c_s_axis_tdata[104+:8],
											c_s_axis_tdata[112+:8],
											c_s_axis_tdata[120+:8],
											c_s_axis_tdata[128+:8],
											c_s_axis_tdata[136+:8],
											c_s_axis_tdata[144+:8],
											c_s_axis_tdata[152+:8],
											c_s_axis_tdata[160+:8],
											c_s_axis_tdata[168+:8],
											c_s_axis_tdata[176+:8],
											c_s_axis_tdata[184+:8],
											c_s_axis_tdata[192+:8],
											c_s_axis_tdata[200+:8],
											c_s_axis_tdata[208+:8],
											c_s_axis_tdata[216+:8],
											c_s_axis_tdata[224+:8],
											c_s_axis_tdata[232+:8],
											c_s_axis_tdata[240+:8],
											c_s_axis_tdata[248+:8]};

        assign mod_id = c_s_axis_tdata[112+:8];
        assign resv = c_s_axis_tdata[120+:4];
        assign control_flag = c_s_axis_tdata[64+:16];
		// 
		reg [2:0] c_state_next;
		reg [C_S_AXIS_DATA_WIDTH-1:0]		r_tdata, c_s_axis_tdata_d1;
		reg [C_S_AXIS_TUSER_WIDTH-1:0]		r_tuser, c_s_axis_tuser_d1;
		reg [C_S_AXIS_DATA_WIDTH/8-1:0]		r_tkeep, c_s_axis_tkeep_d1;
		reg									r_tlast, c_s_axis_tlast_d1;
		reg									r_tvalid, c_s_axis_tvalid_d1;

		reg [C_S_AXIS_DATA_WIDTH-1:0]		r_1st_tdata, r_1st_tdata_next;
		reg [C_S_AXIS_TUSER_WIDTH-1:0]		r_1st_tuser, r_1st_tuser_next;
		reg [C_S_AXIS_DATA_WIDTH/8-1:0]		r_1st_tkeep, r_1st_tkeep_next;
		reg									r_1st_tlast, r_1st_tlast_next;
		reg									r_1st_tvalid, r_1st_tvalid_next;

		reg [7:0]							c_index_cam_next, c_index_act_next;
		reg									c_wr_en_cam_next, c_wr_en_act_next;
		reg [204:0]							c_wr_cam_data, c_wr_cam_data_next;
		reg [ACT_LEN-1:0]					c_wr_act_data, c_wr_act_data_next;

		always @(*) begin
			c_state_next = c_state;

			r_tdata = 0;
			r_tkeep = 0;
			r_tuser = 0;
			r_tlast = 0;
			r_tvalid = 0;

			r_1st_tdata_next = r_1st_tdata;
			r_1st_tkeep_next = r_1st_tkeep;
			r_1st_tuser_next = r_1st_tuser;
			r_1st_tlast_next = r_1st_tlast;
			r_1st_tvalid_next = r_1st_tvalid;

			c_index_cam_next = c_index_cam;
			c_index_act_next = c_index_act;
			c_wr_en_cam_next = 0;
			c_wr_en_act_next = 0;
			c_wr_cam_data_next = c_wr_cam_data;
			c_wr_act_data_next = c_wr_act_data;

			case (c_state) 
				IDLE_C: begin // 1st segment
					r_tvalid = 0;
					if (c_s_axis_tvalid) begin
						// store 1st segment
						r_1st_tdata_next = c_s_axis_tdata;
						r_1st_tuser_next = c_s_axis_tuser;
						r_1st_tkeep_next = c_s_axis_tkeep;
						r_1st_tlast_next = c_s_axis_tlast;
						r_1st_tvalid_next = c_s_axis_tvalid;

						c_state_next = PARSE_C;
					end
				end
				PARSE_C: begin // 2nd segment
					if (mod_id[7:3] == STAGE_ID && mod_id[2:0] == LOOKUP_ID && 
						control_flag == 16'hf2f1 && c_s_axis_tvalid && resv==4'b0) begin
						// should not emit segment
						c_index_cam_next = c_s_axis_tdata[128+:8];
						c_state_next = CAM_TMP_ENTRY;
					end
					else if (!c_s_axis_tvalid) begin
					end
					else begin
						// emit
						r_tdata = r_1st_tdata;
						r_tkeep = r_1st_tkeep;
						r_tuser = r_1st_tuser;
						r_tlast = r_1st_tlast;
						r_tvalid = r_1st_tvalid;
						c_state_next = FLUSH_REST_C;
					end
				end
				CAM_TMP_ENTRY: begin
					if (c_s_axis_tvalid) begin
						c_wr_en_cam_next = 1; // next clk to write
						c_wr_cam_data_next = c_s_axis_tdata_swapped[51+:205];
						
						c_state_next = IDLE_C;
					end
				end
				FLUSH_REST_C: begin
					c_wr_en_cam_next = 0;
					c_wr_en_act_next = 0;
					r_tdata = c_s_axis_tdata_d1;
					r_tkeep = c_s_axis_tkeep_d1;
					r_tuser = c_s_axis_tuser_d1;
					r_tlast = c_s_axis_tlast_d1;
					r_tvalid = c_s_axis_tvalid_d1;
					if (c_s_axis_tvalid_d1 && c_s_axis_tlast_d1) begin
						c_state_next = IDLE_C;
					end
				end
			endcase
		end

		always @(posedge clk) begin
			if (~rst_n) begin
				c_state <= IDLE_C;

				// control output
				c_m_axis_tdata <= 0;
				c_m_axis_tuser <= 0;
				c_m_axis_tkeep <= 0;
				c_m_axis_tlast <= 0;
				c_m_axis_tvalid <= 0;
				//
				c_index_cam <= 0;
				c_index_act <= 0;
				c_wr_en_cam <= 0;
				c_wr_en_act <= 0;
				c_wr_cam_data <= 0;
				c_wr_act_data <= 0;
			end
			else begin
				c_state <= c_state_next;


				// output ctrl master signals
				c_m_axis_tdata <= r_tdata;
				c_m_axis_tkeep <= r_tkeep;
				c_m_axis_tuser <= r_tuser;
				c_m_axis_tlast <= r_tlast;
				c_m_axis_tvalid <= r_tvalid;
				//
				c_index_cam <= c_index_cam_next;
				c_index_act <= c_index_act_next;
				c_wr_en_cam <= c_wr_en_cam_next;
				c_wr_en_act <= c_wr_en_act_next;
				c_wr_cam_data <= c_wr_cam_data_next;
				c_wr_act_data <= c_wr_act_data_next;
			end
		end

		always @(posedge clk) begin
			if (~rst_n) begin
				// delayed 1 clk
				c_s_axis_tdata_d1 <= 0;
				c_s_axis_tuser_d1 <= 0;
				c_s_axis_tkeep_d1 <= 0;
				c_s_axis_tlast_d1 <= 0;
				c_s_axis_tvalid_d1 <= 0;
				//
				r_1st_tdata <= 0;
				r_1st_tkeep <= 0;
				r_1st_tuser <= 0;
				r_1st_tlast <= 0;
				r_1st_tvalid <= 0;
			end
			else begin
				// delayed 1 clk
				c_s_axis_tdata_d1 <= c_s_axis_tdata;
				c_s_axis_tuser_d1 <= c_s_axis_tuser;
				c_s_axis_tkeep_d1 <= c_s_axis_tkeep;
				c_s_axis_tlast_d1 <= c_s_axis_tlast;
				c_s_axis_tvalid_d1 <= c_s_axis_tvalid;
				// 
				r_1st_tdata <= r_1st_tdata_next;
				r_1st_tkeep <= r_1st_tkeep_next;
				r_1st_tuser <= r_1st_tuser_next;
				r_1st_tlast <= r_1st_tlast_next;
				r_1st_tvalid <= r_1st_tvalid_next;
			end
		end

		if (STAGE_ID == 4) begin
			// tcam1 for lookup
        	cam_top # ( 
        	    .C_DEPTH			(16),
        	    // .C_WIDTH			(256),
        	    .C_WIDTH			(205), // 192+1+12
        	    .C_MEM_INIT			(0)
        	    // .C_MEM_INIT_FILE	("./cam_init_file.mif")
        	)
        	//TODO remember to change it back.
        	cam_0
        	(
        	    .CLK				(clk),
				.RST 				(~rst_n),
        	    .CMP_DIN			({vlan_id[3:0], vlan_id[11:4], extract_key}),
        	    // .CMP_DATA_MASK		({4'b1111, extract_mask}),
        	    .CMP_DATA_MASK		(),
        	    .BUSY				(),
        	    .MATCH				(match),
        	    .MATCH_ADDR			(match_addr),

        	    //.WE				(lookup_din_en),
        	    //.WR_ADDR			(lookup_din_addr),
        	    //.DATA_MASK		(lookup_din_mask),  
        	    //.DIN				(lookup_din),

        	    .WE                 (c_wr_en_cam),
        	    .WR_ADDR            (c_index_cam[3:0]),
        	    // .WR_ADDR            (c_index_cam),
        	    .DATA_MASK          (),  //TODO do we need ternary matching?
        	    .DIN                (c_wr_cam_data),
        	    .EN					(1'b1)
        	);
		end
		else begin
			// tcam1 for lookup
        	cam_top # ( 
        	    .C_DEPTH			(16),
        	    // .C_WIDTH			(256),
        	    .C_WIDTH			(205), // 192+1+12
        	    .C_MEM_INIT			(0)
        	    // .C_MEM_INIT_FILE	("./cam_init_file.mif")
        	)
        	//TODO remember to change it back.
        	cam_0
        	(
        	    .CLK				(clk),
				.RST 				(~rst_n),
        	    .CMP_DIN			({vlan_id[3:0], vlan_id[11:4], extract_key}),
        	    // .CMP_DATA_MASK		({4'b0000, extract_mask}),
        	    .CMP_DATA_MASK		(),
        	    .BUSY				(),
        	    .MATCH				(match),
        	    .MATCH_ADDR			(match_addr),

        	    //.WE				(lookup_din_en),
        	    //.WR_ADDR			(lookup_din_addr),
        	    //.DATA_MASK		(lookup_din_mask),  
        	    //.DIN				(lookup_din),

        	    .WE                 (c_wr_en_cam),
        	    .WR_ADDR            (c_index_cam[3:0]),
        	    // .WR_ADDR            (c_index_cam),
        	    .DATA_MASK          (),  //TODO do we need ternary matching?
        	    .DIN                (c_wr_cam_data),
        	    .EN					(1'b1)
        	);
		end
    end

endgenerate

endmodule