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[/] [gigabit_udp_mac/] [trunk/] [LAN/] [UDP_KED/] [ARP_Lookup_table.vhd] - Rev 2
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--**************************************************************************************** library IEEE; use IEEE.STD_LOGIC_1164.all; use IEEE.NUMERIC_STD.all; use IEEE.std_logic_unsigned.all; library work; use work.signal_Package.all; entity ARP_Lookup_table is generic ( g_TIME_OUT_LOOKUP_TABLE_ARP : std_logic_vector(31 downto 0):= x"9502F900" --20S ); port ( -- system signals i_rx_clk : in std_logic; i_tx_clk : in std_logic; i_reset : in std_logic; -- Data in i_mac_addr_in : in std_logic_vector(47 downto 0); i_ip_addr_in : in std_logic_vector(31 downto 0); i_addr_valid_in : in std_logic; i_request_in : in std_logic; i_reqly_in : in std_logic; i_trans_data_in : in std_logic; -- Data out o_mac_addr_out : out std_logic_vector(47 downto 0); o_ip_addr_out : out std_logic_vector(31 downto 0); o_addr_valid_out : out std_logic; o_request_out : out std_logic; o_reply_out : out std_logic ); end ARP_Lookup_table; architecture Behavioral of ARP_Lookup_table is --================================= Constant =========================================================== --Generate Block Conditional Constants constant c_GENERATE_PING_MODULE : boolean := true; --if Ping Block is not Used,Value is False constant c_GENERATE_ARP_MODULE : boolean := true; --if ARP Block is not Used,Value is False constant c_DEFAULT_DST_MAC_ADDR : std_logic_vector (47 downto 0) := x"F46D04962225"; --if ARP Block is not Used,Copy PC MAC Address to This Value --Application Layer Data Length constant c_PACKET_LENGTH : std_logic_vector (15 downto 0):= x"05c0"; --1472 (Maximum Application Layer Packet Length) constant c_udp_tx_src_ip : std_logic_vector (31 downto 0):= x"C0A86403"; --192.168.100.3(FPGA IP Adress) constant c_udp_tx_dst_ip : std_logic_vector (31 downto 0):= x"C0A86402"; --192.168.100.2(PC IP Address) constant c_udp_tx_protocol : std_logic_vector (7 downto 0) := x"11"; --UDP Protocol constant c_udp_tx_src_mac : std_logic_vector (47 downto 0):= x"112233445566"; --FPGA MAC Address constant c_udp_tx_checksum : std_logic_vector (15 downto 0):= x"0000"; --UDP Checksum(Value For This Constant is not Importanat) constant c_udp_tx_src_port : std_logic_vector (15 downto 0):= x"0401"; --UDP Src Port(Value For This Constant is not Importanat) constant c_udp_tx_dst_port : std_logic_vector (15 downto 0):= x"0FF5"; --UDP Dst Port(Value For This Constant is not Importanat) --ARP Constants constant c_TIME_OUT_LOOKUP_TABLE_ARP : std_logic_vector (31 downto 0) := x"9502F900"; --20S(Value/125MHz = 20 ) constant c_TIME_OUT_WAIT_FOR_ARP_REPLY : std_logic_vector (31 downto 0) := x"07735940"; --1S (Value/125MHz = 1 ) constant c_RE_SEND_ARP_REQUEST : std_logic_vector (3 downto 0) := x"A"; --10 --IP Constants constant c_IP_TTL : std_logic_vector (7 downto 0) := x"80"; -- IP Packet Time to live constant c_IP_BC_ADDR : std_logic_vector (31 downto 0) := x"ffffffff"; -- Broadcast IP Address constant c_MAC_BC_ADDR : std_logic_vector (47 downto 0) := x"ffffffffffff"; -- Broadcast MAC Address --====================================================================================================== --============================= Top Signals ============================================================ --signal s_udp_tx_data_len : std_logic_vector (15 downto 0):= c_PACKET_LENGTH; --1472 (Maximum Application Layer Packet Length) --signal s_udp_tx_start : std_logic:='0'; --signal s_udp_tx_ready : std_logic; --signal s_udp_tx_din : std_logic_vector (7 downto 0); -- --signal s_udp_rx_dout : std_logic_vector(7 downto 0); --signal s_udp_rx_dout_rdy : std_logic; --signal s_udp_rx_dout_last : std_logic; -- --signal s_udp_rx_src_ip : std_logic_vector(31 downto 0); --signal s_udp_rx_src_port : std_logic_vector(15 downto 0); --signal s_udp_rx_dst_port : std_logic_vector(15 downto 0); --signal s_udp_rx_data_len : std_logic_vector(15 downto 0); --signal s_udp_rx_err_out_top : std_logic_vector(3 downto 0); --signal s_udp_tx_err_out_top : std_logic_vector(3 downto 0); --signal s_arp_rx_err_out_top : std_logic_vector(3 downto 0); --signal s_ip_rx_dst_ip_top : std_logic_vector(31 downto 0); --signal s_ip_rx_err_out_top : std_logic_vector (3 downto 0); --signal s_ip_tx_err_out_top : std_logic_vector (3 downto 0); -- -- --signal s_rx_clk_out : std_logic; --signal s_buff_rx_clk_out : std_logic; --signal s_tx_clk_out : std_logic; --signal s_buff_tx_clk_out : std_logic; --signal s_clk_125 : std_logic; --signal s_clk_100 : std_logic; --signal s_clk_m : std_logic; -- ----chip scope --signal s_control : std_logic_vector (35 downto 0); --signal s_data_log : std_logic_vector (15 downto 0); -- -- ----for transmit data --signal s_data_test_val : std_logic:='0'; --signal s_data_test_last : std_logic:='0'; --signal s_data_test : std_logic_vector (7 downto 0):=(others=>'0'); --signal s_cnt2 : std_logic_vector (15 downto 0):=(others=>'0'); --signal s_global_reset : std_logic:='1'; -- -- -- --signal s_gmii_txd : std_logic_vector(7 downto 0); --signal s_gmii_tx_en : std_logic; --signal s_gmii_tx_er : std_logic; --====================================================================================================== --===================== Reset_gen Signals ============================================================== signal s_cnt_rst : std_logic_vector(15 downto 0):=(others=>'0'); --====================================================================================================== --================================ Ethernet 1g Signals ================================================= signal s_gtx_clk : std_logic; signal s_tx_clk : std_logic; signal s_rx_clk : std_logic; signal s_rstn : std_logic; signal s_rx_reset : std_logic; signal s_tx_reset : std_logic; --mac to gmii_if signals signal s_mac_gmii_rxd : std_logic_vector(7 downto 0); signal s_mac_gmii_rx_dv : std_logic; signal s_mac_gmii_rx_er : std_logic; signal s_mac_gmii_txd : std_logic_vector(7 downto 0); signal s_mac_gmii_tx_en : std_logic; signal s_mac_gmii_tx_er : std_logic; --ip to mac signals signal s_mac_tx_tready : std_logic; signal s_mac_tx_tdata : std_logic_vector(7 downto 0); signal s_mac_tx_tvalid : std_logic; signal s_mac_tx_tlast : std_logic; signal s_mac_rx_tdata : std_logic_vector(7 downto 0); signal s_mac_rx_tvalid : std_logic; signal s_mac_rx_tlast : std_logic; --====================================================================================================== --================================ UDP Signals ========================================================= -------- for transfer Rx data from IP to UDP layer---------------- signal s_ip_rx_dout : std_logic_vector(7 downto 0); signal s_ip_rx_dout_rdy : std_logic; signal s_ip_rx_dout_last : std_logic; -------- for transfer Rx status data from IP to UDP layer--------- signal s_ip_rx_src_ip : std_logic_vector(31 downto 0); signal s_ip_rx_dst_ip : std_logic_vector(31 downto 0); signal s_ip_rx_data_len : std_logic_vector(15 downto 0); signal s_ip_rx_protocol : std_logic_vector(7 downto 0); signal s_ip_rx_broadcast : std_logic; signal s_ip_rx_err_out_udp : std_logic_vector (3 downto 0); signal s_ip_tx_err_out_udp : std_logic_vector (3 downto 0); signal s_arp_rx_err_out_udp : std_logic_vector (3 downto 0); -------- for transfer Tx data from UDP to IP layer--------------- signal s_ip_tx_start : std_logic; signal s_ip_tx_rdy : std_logic; signal s_ip_tx_din : std_logic_vector(7 downto 0); -------- for transfer Tx header data from UDP to IP layer-------- signal s_ip_tx_src_ip : std_logic_vector(31 downto 0); signal s_ip_tx_dst_ip : std_logic_vector(31 downto 0); signal s_ip_tx_src_mac : std_logic_vector(47 downto 0); signal s_ip_tx_data_len : std_logic_vector(15 downto 0); signal s_ip_tx_protocol : std_logic_vector(7 downto 0); ----------------------------------------------------------------- --====================================================================================================== --============================= IP Signals ============================================================= signal s_ip_mac_tx_tvalid : std_logic; signal s_ip_mac_tx_tlast : std_logic; signal s_ip_mac_tx_tdata : std_logic_vector(7 downto 0); signal s_ip_mac_tx_req : std_logic; signal s_ip_mac_tx_granted : std_logic; signal s_arp_mac_tx_tvalid : std_logic; signal s_arp_mac_tx_tlast : std_logic; signal s_arp_mac_tx_tdata : std_logic_vector(7 downto 0); signal s_arp_mac_tx_req : std_logic; signal s_arp_mac_tx_granted : std_logic; signal s_ping_mac_tx_tvalid : std_logic; signal s_ping_mac_tx_tlast : std_logic; signal s_ping_mac_tx_tdata : std_logic_vector(7 downto 0); signal s_ping_mac_tx_req : std_logic; signal s_ping_mac_tx_granted : std_logic; signal s_lookup_req : std_logic; signal s_lookup_ip : std_logic_vector(31 downto 0); signal s_lookup_mac_addr : std_logic_vector(47 downto 0); signal s_lookup_mac_got : std_logic; signal s_lookup_mac_err : std_logic; signal s_no_ping_packet : std_logic; signal s_ip_rx_err_out : std_logic_vector(3 downto 0); --====================================================================================================== --============================= IP4_TX Signals ========================================================== type t_tx_ip_state_type is (IDLE,WAIT_MAC_ADDR,WAIT_CHN,SEND_DATA); type t_crc_state_type is (IDLE, TOT_LEN, ID, FLAGS, TTL, CKS, SAH, SAL, DAH, DAL, ADDOVF, FINAL, WAIT_END); signal st_crc_state : t_crc_state_type:=IDLE; signal s_tx_hdr_cks : std_logic_vector (23 downto 0):=(others=>'0'); signal s_cal_cheksum : std_logic:='0'; signal st_tx_ip_state : t_tx_ip_state_type:=IDLE; signal s_cnt_ip_tx : std_logic_vector (15 downto 0):=(others=>'0'); signal s_dst_mac_addr : std_logic_vector (47 downto 0); -- arp block updats this signal signal s_total_length : std_logic_vector (15 downto 0); -- s_total_length is i_data_length+20(ip header) signal s_ip_header : std_logic_vector (7 downto 0):=(others=>'0'); --======================================================================================================== --============================ IP4_RX Signals============================================================ type t_rx_ip_state_type is (IDLE,ETH_H,IP_H,USER_DATA,WAIT_END); signal st_RX_IP_STATE : t_rx_ip_state_type:=IDLE; signal s_cnt_ip_rx : std_logic_vector (15 downto 0):=x"0001"; signal s_src_ip_ip_rx : std_logic_vector (31 downto 0):=(others=>'0'); signal s_dst_ip_ip_rx : std_logic_vector (31 downto 0):=(others=>'0'); signal s_data_len_ip_rx : std_logic_vector (15 downto 0):=(others=>'0'); signal s_protocol_ip_rx : std_logic_vector (7 downto 0) :=(others=>'0'); signal s_broadcast_ip_rx : std_logic; --======================================================================================================== --==================================== ARP Signals ========================================================== type t_arp_state_type is (IDLE,LOOK_UP,WAIT_PC_REPLY); signal st_ARP_STATE : t_arp_state_type:=IDLE; signal s_timeout_wait_reply_cnt : std_logic_vector(31 downto 0):=(others=>'0'); signal s_error_cnt : std_logic_vector(3 downto 0):=(others=>'0'); --ARP_TX Signals signal s_dst_ip_addr_pc : std_logic_vector(31 downto 0):=(others=>'0'); signal s_dst_mac_addr_pc : std_logic_vector(47 downto 0):=(others=>'0'); signal s_dst_ip_addr_lookup : std_logic_vector(31 downto 0):=(others=>'0'); signal s_fpga_req_tx : std_logic:='0'; signal s_pc_req_tx : std_logic:='0'; --ARP_RX Signals signal s_ip_addr0 : std_logic_vector(31 downto 0); signal s_mac_addr0 : std_logic_vector(47 downto 0); signal s_addr_valid0 : std_logic; signal s_pc_reply_rx : std_logic; signal s_pc_req_rx : std_logic; --=========================================================================================================== --=============================== ARP RX Signals ============================================================ type t_rx_arp_state_type is (IDLE,ETH_H,ARP_DATA,WAIT_END); signal st_RX_ARP_STATE : t_rx_arp_state_type:=IDLE; signal s_cnt_arp_rx : std_logic_vector (15 downto 0):=x"0001"; signal s_dst_ip : std_logic_vector (31 downto 0):=(others=>'0'); signal s_operation : std_logic_vector (15 downto 0):=(others=>'0'); signal s_addr_valid : std_logic:='0'; signal s_pc_req : std_logic:='0'; signal s_pc_reply : std_logic:='0'; signal s_src_mac_arp_rx : std_logic_vector (47 downto 0):=(others=>'0'); signal s_src_ip_arp_rx : std_logic_vector (31 downto 0):=(others=>'0'); signal s_addr_valid_pulse : std_logic:='0'; signal s_pc_req_pulse : std_logic:='0'; signal s_pc_reply_pulse : std_logic:='0'; signal s_trans_data_pulse : std_logic:='0'; --=========================================================================================================== --=================================== ARP LOOKUP_TABLE Signals ============================================== signal s_timeout_lookup_table_cnt : std_logic_vector(31 downto 0):=(others=>'0'); signal s_din : std_logic_vector(82 downto 0):=(others=>'0'); signal s_wr_en : std_logic; signal s_dout : std_logic_vector(82 downto 0):=(others=>'0'); signal s_valid : std_logic; signal s_empty : std_logic; signal s_notempty : std_logic; signal s_mac_addr_out : std_logic_vector(47 downto 0):=(others=>'0'); signal s_ip_addr_out : std_logic_vector(31 downto 0):=(others=>'0'); signal s_addr_valid_out : std_logic:='0'; signal s_request_out : std_logic:='0'; signal s_reply_out : std_logic:='0'; --============================================================================================================ --============================ ARP TX Signals ================================================================ type t_arp_tx_state_type is (IDLE,WAIT_CHN,SEND_DATA); signal st_tx_arp_state : t_arp_tx_state_type:=IDLE; signal s_cnt_arp_tx : std_logic_vector (7 downto 0):=(others=>'0'); signal s_arp_type : std_logic_vector (15 downto 0):=(others=>'0'); signal s_dst_ip_addr : std_logic_vector (31 downto 0):=(others=>'0'); signal s_dst_mac_addr1 : std_logic_vector (47 downto 0):=(others=>'0'); signal s_dst_mac_addr2 : std_logic_vector (47 downto 0):=(others=>'0'); --============================================================================================================ --============================== PING Signals ================================================================= --for Delayed Inputs signal s_mac_data_in_r : std_logic_vector (7 downto 0); signal s_mac_data_in_valid_r : std_logic; signal s_mac_data_in_last_r : std_logic; --Sync_fifo_ping Signals signal s_ip_rx_in : std_logic_vector(14 downto 0); signal s_ip_rx_out : std_logic_vector(14 downto 0):=(others=>'0'); signal s_mac_data_in : std_logic_vector(7 downto 0); signal s_mac_data_in_valid : std_logic; signal s_mac_data_in_last : std_logic; signal s_mac_data_in_last_d : std_logic; signal s_ip_rx_err_in : std_logic_vector(3 downto 0); signal s_no_ping_data : std_logic; signal s_empty_sync_fifo : std_logic:='0'; signal s_not_empty_sync_fifo: std_logic; --Data_fifo_ping Signals signal s_rst_fifo_ping : std_logic:='1'; signal s_wr_en_fifo_ping : std_logic:='0'; signal s_din_fifo_ping : std_logic_vector(7 downto 0):=(others=>'0'); signal s_rd_en_fifo_ping : std_logic; signal s_dout_fifo_ping : std_logic_vector(7 downto 0); --Checksum Signals signal s_checksum_data_out : std_logic_vector(15 downto 0); signal s_checksum_data_in : std_logic_vector(7 downto 0); signal s_checksum_start_calc : std_logic:='0'; signal s_checksum_stop_calc : std_logic:='0'; --st_PING_STATE Machine Process Signals type t_ping_state is (IDLE,ACQUIRE_DATA,WAIT_END,WAIT_CHN,SEND_DATA); signal st_PING_STATE : t_ping_state:=IDLE; signal s_wr_cnt : std_logic_vector(7 downto 0):=(others=>'0'); signal s_rd_cnt : std_logic_vector(7 downto 0):=(others=>'0'); signal s_start_send : std_logic; signal s_src_mac_ping : std_logic_vector(47 downto 0):=(others=>'0'); signal s_dst_mac_ping : std_logic_vector(47 downto 0):=(others=>'0'); signal s_src_ip_ping : std_logic_vector(31 downto 0):=(others=>'0'); signal s_dst_ip_ping : std_logic_vector(31 downto 0):=(others=>'0'); --================================================================================================================= --================================= Ping Checksum Calc Signals ==================================================== type t_checksum_state is (IDLE,CALC); signal st_checksum_state : t_checksum_state:=IDLE; signal s_flag : std_logic:='0'; signal s_din_r : std_logic_vector(7 downto 0); signal s_sum : std_logic_vector(31 downto 0):=(others=>'0'); --================================================================================================================= --============================ TX_Arbitior Signals ===================================================================== type t_state_type is (IDLE,DATA_REQ,ARP_REQ,PING_REQ); signal st_STATE : t_state_type:=IDLE; --====================================================================================================================== --============================ UDP RX Signals =========================================================================== type t_rx_udp_state_type is (IDLE, UDP_HDR, USER_DATA, WAIT_END); signal st_RX_UDP_STATE : t_rx_udp_state_type:=IDLE; signal s_cnt_udp_rx : std_logic_vector (15 downto 0):=x"0001"; signal s_src_ip_udp_rx : std_logic_vector (31 downto 0):=(others=>'0'); signal s_src_port : std_logic_vector (15 downto 0):=(others=>'0'); signal s_dst_port : std_logic_vector (15 downto 0):=(others=>'0'); signal s_data_len_udp_rx : std_logic_vector (15 downto 0):=(others=>'0'); signal s_err_out : std_logic_vector (3 downto 0) :=(others=>'0'); --======================================================================================================================= --============================ UDP TX Signals ============================================================================= type t_tx_udp_state_type is (IDLE,SEND_DATA); signal st_tx_udp_state : t_tx_udp_state_type:=IDLE; signal s_cnt_udp_tx : std_logic_vector (15 downto 0):=(others=>'0'); signal s_ip_data_len : std_logic_vector (15 downto 0); signal s_udp_header : std_logic_vector (7 downto 0):=(others=>'0'); --========================================================================================================================== --============================ PHY_Interface Signals ======================================================================= signal s_gmii_col_reg : std_logic; signal s_gmii_col_reg_reg : std_logic; signal s_gmii_rx_clk : std_logic; --========================================================================================================================== --=========================== Ping_Pong Fifo Signals ======================================================================= signal s_empty1 : std_logic; signal s_empty2 : std_logic; signal s_notempty1 : std_logic; signal s_notempty2 : std_logic; signal s_data_m : std_logic_vector(7 downto 0); signal s_valid_m : std_logic; signal s_last_m : std_logic; signal s_wr_en_a : std_logic:='0'; signal s_din_a : std_logic_vector(7 downto 0):=(others=>'0'); signal s_rd_en_a : std_logic; signal s_dout_a : std_logic_vector(7 downto 0); signal s_valid_a : std_logic; signal s_empty_a : std_logic; signal s_wr_en_b : std_logic:='0'; signal s_din_b : std_logic_vector(7 downto 0):=(others=>'0'); signal s_rd_en_b : std_logic; signal s_dout_b : std_logic_vector(7 downto 0); signal s_valid_b : std_logic; signal s_empty_b : std_logic; signal s_cnt_a : std_logic_vector(15 downto 0):=(others=>'0'); signal s_cnt_b : std_logic_vector(15 downto 0):=(others=>'0'); signal s_rd_cnt_a : std_logic_vector(15 downto 0):=(others=>'0'); signal s_rd_cnt_b : std_logic_vector(15 downto 0):=(others=>'0'); signal s_busy_a : std_logic:='0'; signal s_busy_b : std_logic:='0'; signal s_last_a : std_logic:='0'; signal s_last_b : std_logic:='0'; signal s_dout_len : std_logic_vector(15 downto 0); type t_pingpong_state is (wait_data,rd_fifo_a,rd_fifo_b); signal st_ping_pong_state : t_pingpong_state:=wait_data; --========================================================================================================================= --=========Sync Fifo for Convert RX_CLK Domain Signals to TX_CLK Domain Signals=============== component arp_sync_fifo port ( rst : IN STD_LOGIC; wr_clk : IN STD_LOGIC; wr_en : IN STD_LOGIC; din : IN STD_LOGIC_VECTOR(82 DOWNTO 0); rd_clk : IN STD_LOGIC; rd_en : IN STD_LOGIC; dout : OUT STD_LOGIC_VECTOR(82 DOWNTO 0); valid : OUT STD_LOGIC; full : OUT STD_LOGIC; empty : OUT STD_LOGIC ); end component; --============================================================================================ begin s_notempty <= not(s_empty); s_din <= (i_reqly_in & i_request_in & i_addr_valid_in & i_ip_addr_in & i_mac_addr_in); s_mac_addr_out <= s_dout(47 downto 0); s_ip_addr_out <= s_dout(79 downto 48); s_addr_valid_out <= s_dout(80); s_request_out <= s_dout(81); s_reply_out <= s_dout(82); --================== Process for Update and Timeout Arp Lookup Table ============================ p_update_arp_lookup:process(i_tx_clk) begin if rising_edge(i_tx_clk) then if (i_reset = '1' ) then s_timeout_lookup_table_cnt <= (others=>'0'); o_addr_valid_out <= '0'; else s_timeout_lookup_table_cnt <= s_timeout_lookup_table_cnt+1; if (s_valid = '1') then s_timeout_lookup_table_cnt <= (others=>'0'); o_addr_valid_out <= s_addr_valid_out; o_mac_addr_out <= s_mac_addr_out; o_ip_addr_out <= s_ip_addr_out; elsif (s_timeout_lookup_table_cnt = g_TIME_OUT_LOOKUP_TABLE_ARP) then --20s time out s_timeout_lookup_table_cnt <= (others=>'0'); o_addr_valid_out <= '0'; end if; end if; end if; end process p_update_arp_lookup; --=============================================================================================== --==================== Process for deliver ARP Requests to ARP_RX Module ======================== p_Synchronous:process(i_tx_clk) begin if rising_edge(i_tx_clk) then if (i_reset = '1' ) then o_request_out <= '0'; o_reply_out <= '0'; else o_request_out <= '0'; o_reply_out <= '0'; if (s_valid = '1') then o_request_out <=s_request_out; o_reply_out <=s_reply_out; end if; end if; end if; end process p_Synchronous; --=============================================================================================== --=========Sync Fifo for Convert RX_CLK Domain Signals to TX_CLK Domain Signals ================= inst_arp_sync_fifo1:arp_sync_fifo port map ( rst => i_reset, wr_clk => i_rx_clk, wr_en => i_trans_data_in, din => s_din, rd_clk => i_tx_clk, rd_en => s_notempty, dout => s_dout, valid => s_valid, full => open, empty => s_empty ); --=============================================================================================== end Behavioral;