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[/] [udp_ip_stack/] [tags/] [v2.0/] [rtl/] [vhdl/] [IP_complete_nomac.vhd] - Rev 22
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---------------------------------------------------------------------------------- -- Company: -- Engineer: -- -- Create Date: 12:43:16 06/04/2011 -- Design Name: -- Module Name: IP_complete_nomac - Behavioral -- Project Name: -- Target Devices: -- Tool versions: -- Description: Implements complete IP stack with ARP (but no MAC) -- -- Dependencies: -- -- Revision: -- Revision 0.01 - File Created -- Revision 0.02 - separated RX and TX clocks -- Revision 0.03 - Added mac_tx_tfirst -- Additional Comments: -- ---------------------------------------------------------------------------------- LIBRARY ieee; USE ieee.std_logic_1164.ALL; use IEEE.NUMERIC_STD.ALL; use work.axi.all; use work.ipv4_types.all; use work.arp_types.all; use work.arp; use work.arpv2; entity IP_complete_nomac is generic ( CLOCK_FREQ : integer := 125000000; -- freq of data_in_clk -- needed to timout cntr ARP_TIMEOUT : integer := 60; -- ARP response timeout (s) ARP_MAX_PKT_TMO : integer := 5; -- # wrong nwk pkts received before set error MAX_ARP_ENTRIES : integer := 255 -- max entries in the ARP store ); Port ( -- IP Layer signals ip_tx_start : in std_logic; ip_tx : in ipv4_tx_type; -- IP tx cxns ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission) ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data ip_rx_start : out std_logic; -- indicates receipt of ip frame. ip_rx : out ipv4_rx_type; -- system signals rx_clk : in STD_LOGIC; tx_clk : in STD_LOGIC; reset : in STD_LOGIC; our_ip_address : in STD_LOGIC_VECTOR (31 downto 0); our_mac_address : in std_logic_vector (47 downto 0); control : in ip_control_type; -- status signals arp_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- count of arp pkts received ip_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us -- MAC Transmitter mac_tx_tdata : out std_logic_vector(7 downto 0); -- data byte to tx mac_tx_tvalid : out std_logic; -- tdata is valid mac_tx_tready : in std_logic; -- mac is ready to accept data mac_tx_tfirst : out std_logic; -- indicates first byte of frame mac_tx_tlast : out std_logic; -- indicates last byte of frame -- MAC Receiver mac_rx_tdata : in std_logic_vector(7 downto 0); -- data byte received mac_rx_tvalid : in std_logic; -- indicates tdata is valid mac_rx_tready : out std_logic; -- tells mac that we are ready to take data mac_rx_tlast : in std_logic -- indicates last byte of the trame ); end IP_complete_nomac; architecture structural of IP_complete_nomac is COMPONENT IPv4 PORT( -- IP Layer signals ip_tx_start : in std_logic; ip_tx : in ipv4_tx_type; -- IP tx cxns ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission) ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data ip_rx_start : out std_logic; -- indicates receipt of ip frame. ip_rx : out ipv4_rx_type; -- system control signals rx_clk : in STD_LOGIC; tx_clk : in STD_LOGIC; reset : in STD_LOGIC; our_ip_address : in STD_LOGIC_VECTOR (31 downto 0); our_mac_address : in std_logic_vector (47 downto 0); -- system status signals rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us -- ARP lookup signals arp_req_req : out arp_req_req_type; arp_req_rslt : in arp_req_rslt_type; -- MAC layer RX signals mac_data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame) mac_data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock mac_data_in_last : in STD_LOGIC; -- indicates last data in frame -- MAC layer TX signals mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx) mac_tx_granted : in std_logic; -- indicates that access to channel has been granted mac_data_out_ready : in std_logic; -- indicates system ready to consume data mac_data_out_valid : out std_logic; -- indicates data out is valid mac_data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame mac_data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame mac_data_out : out std_logic_vector (7 downto 0) -- ethernet frame (from dst mac addr through to last byte of frame) ); END COMPONENT; COMPONENT arp generic ( CLOCK_FREQ : integer := 125000000; -- freq of data_in_clk -- needed to timout cntr ARP_TIMEOUT : integer := 60; -- ARP response timeout (s) ARP_MAX_PKT_TMO : integer := 1; -- (added for compatibility with arpv2. this value not used in this impl) MAX_ARP_ENTRIES : integer := 1 -- (added for compatibility with arpv2. this value not used in this impl) ); Port ( -- lookup request signals arp_req_req : in arp_req_req_type; arp_req_rslt : out arp_req_rslt_type; -- MAC layer RX signals data_in_clk : in STD_LOGIC; reset : in STD_LOGIC; data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame) data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock data_in_last : in STD_LOGIC; -- indicates last data in frame -- MAC layer TX signals mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx) mac_tx_granted : in std_logic; -- indicates that access to channel has been granted data_out_clk : in std_logic; data_out_ready : in std_logic; -- indicates system ready to consume data data_out_valid : out std_logic; -- indicates data out is valid data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame data_out : out std_logic_vector (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame) -- system signals our_mac_address : in STD_LOGIC_VECTOR (47 downto 0); our_ip_address : in STD_LOGIC_VECTOR (31 downto 0); control : in arp_control_type; req_count : out STD_LOGIC_VECTOR(7 downto 0) -- count of arp pkts received ); END COMPONENT; COMPONENT tx_arbitrator PORT( clk : in std_logic; reset : in std_logic; req_1 : in std_logic; grant_1 : out std_logic; data_1 : in std_logic_vector(7 downto 0); -- data byte to tx valid_1 : in std_logic; -- tdata is valid first_1 : in std_logic; -- indicates first byte of frame last_1 : in std_logic; -- indicates last byte of frame req_2 : in std_logic; grant_2 : out std_logic; data_2 : in std_logic_vector(7 downto 0); -- data byte to tx valid_2 : in std_logic; -- tdata is valid first_2 : in std_logic; -- indicates first byte of frame last_2 : in std_logic; -- indicates last byte of frame data : out std_logic_vector(7 downto 0); -- data byte to tx valid : out std_logic; -- tdata is valid first : out std_logic; -- indicates first byte of frame last : out std_logic -- indicates last byte of frame ); END COMPONENT; ------------------- -- Configuration -- -- Enable one of the following to specify which -- implementation of the ARP layer to use ------------------- -- for arp_layer : arp use entity work.arp; -- single slot arbitrator for arp_layer : arp use entity work.arpv2; -- multislot arbitrator --------------------------- -- Signals --------------------------- -- ARP REQUEST signal arp_req_req_int : arp_req_req_type; signal arp_req_rslt_int : arp_req_rslt_type; -- MAC arbitration busses signal ip_mac_req : std_logic; signal ip_mac_grant : std_logic; signal ip_mac_data_out : std_logic_vector (7 downto 0); signal ip_mac_valid : std_logic; signal ip_mac_first : std_logic; signal ip_mac_last : std_logic; signal arp_mac_req : std_logic; signal arp_mac_grant : std_logic; signal arp_mac_data_out : std_logic_vector (7 downto 0); signal arp_mac_valid : std_logic; signal arp_mac_first : std_logic; signal arp_mac_last : std_logic; -- MAC RX bus signal mac_rx_tready_int : std_logic; -- MAC TX bus signal mac_tx_tdata_int : std_logic_vector (7 downto 0); signal mac_tx_tvalid_int : std_logic; signal mac_tx_tfirst_int : std_logic; signal mac_tx_tlast_int : std_logic; -- control signals signal mac_tx_granted_int : std_logic; begin mac_rx_tready_int <= '1'; -- enable the mac receiver -- set followers mac_tx_tdata <= mac_tx_tdata_int; mac_tx_tvalid <= mac_tx_tvalid_int; mac_tx_tfirst <= mac_tx_tfirst_int; mac_tx_tlast <= mac_tx_tlast_int; mac_rx_tready <= mac_rx_tready_int; ------------------------------------------------------------------------------ -- Instantiate the IP layer ------------------------------------------------------------------------------ IP_layer : IPv4 PORT MAP ( ip_tx_start => ip_tx_start, ip_tx => ip_tx, ip_tx_result => ip_tx_result, ip_tx_data_out_ready=> ip_tx_data_out_ready, ip_rx_start => ip_rx_start, ip_rx => ip_rx, rx_clk => rx_clk, tx_clk => tx_clk, reset => reset, our_ip_address => our_ip_address, our_mac_address => our_mac_address, rx_pkt_count => ip_pkt_count, arp_req_req => arp_req_req_int, arp_req_rslt => arp_req_rslt_int, mac_tx_req => ip_mac_req, mac_tx_granted => ip_mac_grant, mac_data_out_ready => mac_tx_tready, mac_data_out_valid => ip_mac_valid, mac_data_out_first => ip_mac_first, mac_data_out_last => ip_mac_last, mac_data_out => ip_mac_data_out, mac_data_in => mac_rx_tdata, mac_data_in_valid => mac_rx_tvalid, mac_data_in_last => mac_rx_tlast ); ------------------------------------------------------------------------------ -- Instantiate the ARP layer ------------------------------------------------------------------------------ arp_layer : arp generic map ( CLOCK_FREQ => CLOCK_FREQ, ARP_TIMEOUT => ARP_TIMEOUT, ARP_MAX_PKT_TMO => ARP_MAX_PKT_TMO, MAX_ARP_ENTRIES => MAX_ARP_ENTRIES ) Port map( -- request signals arp_req_req => arp_req_req_int, arp_req_rslt => arp_req_rslt_int, -- rx signals data_in_clk => rx_clk, reset => reset, data_in => mac_rx_tdata, data_in_valid => mac_rx_tvalid, data_in_last => mac_rx_tlast, -- tx signals mac_tx_req => arp_mac_req, mac_tx_granted => arp_mac_grant, data_out_clk => tx_clk, data_out_ready => mac_tx_tready, data_out_valid => arp_mac_valid, data_out_first => arp_mac_first, data_out_last => arp_mac_last, data_out => arp_mac_data_out, -- system signals our_mac_address => our_mac_address, our_ip_address => our_ip_address, control => control.arp_controls, req_count => arp_pkt_count ); ------------------------------------------------------------------------------ -- Instantiate the TX Arbitrator ------------------------------------------------------------------------------ mac_tx_arb : tx_arbitrator Port map( clk => tx_clk, reset => reset, req_1 => ip_mac_req, grant_1 => ip_mac_grant, data_1 => ip_mac_data_out, valid_1 => ip_mac_valid, first_1 => ip_mac_first, last_1 => ip_mac_last, req_2 => arp_mac_req, grant_2 => arp_mac_grant, data_2 => arp_mac_data_out, valid_2 => arp_mac_valid, first_2 => arp_mac_first, last_2 => arp_mac_last, data => mac_tx_tdata_int, valid => mac_tx_tvalid_int, first => mac_tx_tfirst_int, last => mac_tx_tlast_int ); end structural;
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