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[/] [udp_ip_stack/] [tags/] [v2.0/] [rtl/] [vhdl/] [IPv4.vhd] - Rev 37
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---------------------------------------------------------------------------------- -- Company: -- Engineer: Peter Fall -- -- Create Date: 16:20:42 06/01/2011 -- Design Name: -- Module Name: IPv4 - Behavioral -- Project Name: -- Target Devices: -- Tool versions: -- Description: -- handle simple IP RX and TX -- doesnt handle seg & reass -- dest MAC addr resolution through ARP layer -- Handle IPv4 protocol -- Respond to ARP requests and replies -- Ignore pkts that are not IP -- Ignore pkts that are not addressed to us-- -- Dependencies: -- -- Revision: -- Revision 0.01 - File Created -- Revision 0.02 - separated RX and TX clocks -- Revision 0.03 - Added mac_data_out_first -- 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; entity IPv4 is 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 IPv4; architecture structural of IPv4 is COMPONENT IPv4_TX 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 -- system signals clk : in STD_LOGIC; -- same clock used to clock mac data and ip data reset : in STD_LOGIC; our_ip_address : in STD_LOGIC_VECTOR (31 downto 0); our_mac_address : in std_logic_vector (47 downto 0); -- ARP lookup signals arp_req_req : out arp_req_req_type; arp_req_rslt : in arp_req_rslt_type; -- 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 IPv4_RX PORT( -- IP Layer signals ip_rx : out ipv4_rx_type; ip_rx_start : out std_logic; -- indicates receipt of ip frame. -- system signals clk : in STD_LOGIC; reset : in STD_LOGIC; our_ip_address : in STD_LOGIC_VECTOR (31 downto 0); rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us -- 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 ); END COMPONENT; begin TX : IPv4_TX 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, clk => tx_clk, reset => reset, our_ip_address => our_ip_address, our_mac_address => our_mac_address, arp_req_req => arp_req_req, arp_req_rslt => arp_req_rslt, mac_tx_req => mac_tx_req, mac_tx_granted => mac_tx_granted, mac_data_out_ready => mac_data_out_ready, mac_data_out_valid => mac_data_out_valid, mac_data_out_first => mac_data_out_first, mac_data_out_last => mac_data_out_last, mac_data_out => mac_data_out ); RX : IPv4_RX PORT MAP ( ip_rx => ip_rx, ip_rx_start => ip_rx_start, clk => rx_clk, reset => reset, our_ip_address => our_ip_address, rx_pkt_count => rx_pkt_count, mac_data_in => mac_data_in, mac_data_in_valid => mac_data_in_valid, mac_data_in_last => mac_data_in_last ); end structural;
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