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----------------------------------------------------------------------------------
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-- Company:
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-- Company:
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-- Engineer: Peter Fall
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-- Engineer: Peter Fall
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--
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--
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-- Create Date: 16:20:42 06/01/2011
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-- Create Date: 16:20:42 06/01/2011
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-- Design Name:
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-- Design Name:
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-- Module Name: IPv4 - Behavioral
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-- Module Name: IPv4 - Behavioral
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-- Project Name:
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-- Project Name:
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-- Target Devices:
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-- Target Devices:
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-- Tool versions:
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-- Tool versions:
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-- Description:
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-- Description:
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-- handle simple IP RX and TX
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-- handle simple IP RX and TX
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-- doesnt handle seg & reass
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-- doesnt handle seg & reass
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-- dest MAC addr resolution through ARP layer
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-- dest MAC addr resolution through ARP layer
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-- Handle IPv4 protocol
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-- Handle IPv4 protocol
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-- Respond to ARP requests and replies
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-- Respond to ARP requests and replies
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-- Ignore pkts that are not IP
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-- Ignore pkts that are not IP
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-- Ignore pkts that are not addressed to us--
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-- Ignore pkts that are not addressed to us--
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-- Dependencies:
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-- Dependencies:
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--
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--
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-- Revision:
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-- Revision:
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-- Revision 0.01 - File Created
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-- Revision 0.01 - File Created
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-- Revision 0.02 - separated RX and TX clocks
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-- Revision 0.02 - separated RX and TX clocks
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-- Revision 0.03 - Added mac_data_out_first
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-- Additional Comments:
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-- Additional Comments:
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--
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--
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----------------------------------------------------------------------------------
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----------------------------------------------------------------------------------
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LIBRARY ieee;
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LIBRARY ieee;
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USE ieee.std_logic_1164.ALL;
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USE ieee.std_logic_1164.ALL;
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use IEEE.NUMERIC_STD.ALL;
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use IEEE.NUMERIC_STD.ALL;
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use work.axi.all;
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use work.axi.all;
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use work.ipv4_types.all;
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use work.ipv4_types.all;
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use work.arp_types.all;
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use work.arp_types.all;
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entity IPv4 is
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entity IPv4 is
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Port (
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Port (
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-- IP Layer signals
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-- IP Layer signals
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ip_tx_start : in std_logic;
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ip_tx_start : in std_logic;
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ip_tx : in ipv4_tx_type; -- IP tx cxns
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ip_tx : in ipv4_tx_type; -- IP tx cxns
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ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission)
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ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission)
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ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data
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ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data
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ip_rx_start : out std_logic; -- indicates receipt of ip frame.
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ip_rx_start : out std_logic; -- indicates receipt of ip frame.
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ip_rx : out ipv4_rx_type;
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ip_rx : out ipv4_rx_type;
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-- system control signals
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-- system control signals
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rx_clk : in STD_LOGIC;
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rx_clk : in STD_LOGIC;
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tx_clk : in STD_LOGIC;
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tx_clk : in STD_LOGIC;
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reset : in STD_LOGIC;
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reset : in STD_LOGIC;
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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our_mac_address : in std_logic_vector (47 downto 0);
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our_mac_address : in std_logic_vector (47 downto 0);
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-- system status signals
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-- system status signals
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rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us
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rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us
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-- ARP lookup signals
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-- ARP lookup signals
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arp_req_req : out arp_req_req_type;
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arp_req_req : out arp_req_req_type;
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arp_req_rslt : in arp_req_rslt_type;
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arp_req_rslt : in arp_req_rslt_type;
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-- MAC layer RX signals
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-- MAC layer RX signals
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mac_data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock
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mac_data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock
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mac_data_in_last : in STD_LOGIC; -- indicates last data in frame
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mac_data_in_last : in STD_LOGIC; -- indicates last data in frame
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-- MAC layer TX signals
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-- MAC layer TX signals
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mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx)
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mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx)
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mac_tx_granted : in std_logic; -- indicates that access to channel has been granted
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mac_tx_granted : in std_logic; -- indicates that access to channel has been granted
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mac_data_out_ready : in std_logic; -- indicates system ready to consume data
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mac_data_out_ready : in std_logic; -- indicates system ready to consume data
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mac_data_out_valid : out std_logic; -- indicates data out is valid
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mac_data_out_valid : out std_logic; -- indicates data out is valid
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mac_data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame
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mac_data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame
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mac_data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame
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mac_data_out : out std_logic_vector (7 downto 0) -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_out : out std_logic_vector (7 downto 0) -- ethernet frame (from dst mac addr through to last byte of frame)
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);
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);
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end IPv4;
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end IPv4;
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architecture structural of IPv4 is
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architecture structural of IPv4 is
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COMPONENT IPv4_TX
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COMPONENT IPv4_TX
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PORT(
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PORT(
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-- IP Layer signals
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-- IP Layer signals
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ip_tx_start : in std_logic;
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ip_tx_start : in std_logic;
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ip_tx : in ipv4_tx_type; -- IP tx cxns
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ip_tx : in ipv4_tx_type; -- IP tx cxns
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ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission)
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ip_tx_result : out std_logic_vector (1 downto 0); -- tx status (changes during transmission)
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ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data
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ip_tx_data_out_ready : out std_logic; -- indicates IP TX is ready to take data
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-- system control signals
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clk : in STD_LOGIC;
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-- system signals
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clk : in STD_LOGIC; -- same clock used to clock mac data and ip data
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reset : in STD_LOGIC;
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reset : in STD_LOGIC;
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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our_mac_address : in std_logic_vector (47 downto 0);
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our_mac_address : in std_logic_vector (47 downto 0);
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-- ARP lookup signals
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-- ARP lookup signals
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arp_req_req : out arp_req_req_type;
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arp_req_req : out arp_req_req_type;
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arp_req_rslt : in arp_req_rslt_type;
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arp_req_rslt : in arp_req_rslt_type;
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-- MAC layer TX signals
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-- MAC layer TX signals
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mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx)
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mac_tx_req : out std_logic; -- indicates that ip wants access to channel (stays up for as long as tx)
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mac_tx_granted : in std_logic; -- indicates that access to channel has been granted
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mac_tx_granted : in std_logic; -- indicates that access to channel has been granted
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mac_data_out_ready : in std_logic; -- indicates system ready to consume data
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mac_data_out_ready : in std_logic; -- indicates system ready to consume data
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mac_data_out_valid : out std_logic; -- indicates data out is valid
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mac_data_out_valid : out std_logic; -- indicates data out is valid
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mac_data_out_first : out std_logic; -- with data out valid indicates the first byte of a frame
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mac_data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame
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mac_data_out_last : out std_logic; -- with data out valid indicates the last byte of a frame
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mac_data_out : out std_logic_vector (7 downto 0) -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_out : out std_logic_vector (7 downto 0) -- ethernet frame (from dst mac addr through to last byte of frame)
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);
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);
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END COMPONENT;
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END COMPONENT;
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COMPONENT IPv4_RX
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COMPONENT IPv4_RX
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PORT(
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PORT(
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-- IP Layer signals
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-- IP Layer signals
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ip_rx : out ipv4_rx_type;
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ip_rx : out ipv4_rx_type;
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ip_rx_start : out std_logic; -- indicates receipt of ip frame.
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ip_rx_start : out std_logic; -- indicates receipt of ip frame.
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-- system signals
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-- system signals
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clk : in STD_LOGIC;
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clk : in STD_LOGIC;
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reset : in STD_LOGIC;
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reset : in STD_LOGIC;
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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our_ip_address : in STD_LOGIC_VECTOR (31 downto 0);
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rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us
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rx_pkt_count : out STD_LOGIC_VECTOR(7 downto 0); -- number of IP pkts received for us
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-- MAC layer RX signals
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-- MAC layer RX signals
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mac_data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_in : in STD_LOGIC_VECTOR (7 downto 0); -- ethernet frame (from dst mac addr through to last byte of frame)
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mac_data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock
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mac_data_in_valid : in STD_LOGIC; -- indicates data_in valid on clock
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mac_data_in_last : in STD_LOGIC -- indicates last data in frame
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mac_data_in_last : in STD_LOGIC -- indicates last data in frame
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);
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);
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END COMPONENT;
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END COMPONENT;
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begin
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begin
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TX : IPv4_TX PORT MAP (
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TX : IPv4_TX PORT MAP (
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ip_tx_start => ip_tx_start,
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ip_tx_start => ip_tx_start,
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ip_tx => ip_tx,
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ip_tx => ip_tx,
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ip_tx_result => ip_tx_result,
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ip_tx_result => ip_tx_result,
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ip_tx_data_out_ready=> ip_tx_data_out_ready,
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ip_tx_data_out_ready=> ip_tx_data_out_ready,
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clk => tx_clk,
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clk => tx_clk,
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reset => reset,
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reset => reset,
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our_ip_address => our_ip_address,
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our_ip_address => our_ip_address,
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our_mac_address => our_mac_address,
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our_mac_address => our_mac_address,
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arp_req_req => arp_req_req,
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arp_req_req => arp_req_req,
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arp_req_rslt => arp_req_rslt,
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arp_req_rslt => arp_req_rslt,
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mac_tx_req => mac_tx_req,
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mac_tx_req => mac_tx_req,
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mac_tx_granted => mac_tx_granted,
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mac_tx_granted => mac_tx_granted,
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mac_data_out_ready => mac_data_out_ready,
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mac_data_out_ready => mac_data_out_ready,
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mac_data_out_valid => mac_data_out_valid,
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mac_data_out_valid => mac_data_out_valid,
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mac_data_out_first => mac_data_out_first,
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mac_data_out_last => mac_data_out_last,
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mac_data_out_last => mac_data_out_last,
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mac_data_out => mac_data_out
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mac_data_out => mac_data_out
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);
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);
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RX : IPv4_RX PORT MAP (
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RX : IPv4_RX PORT MAP (
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ip_rx => ip_rx,
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ip_rx => ip_rx,
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ip_rx_start => ip_rx_start,
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ip_rx_start => ip_rx_start,
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clk => rx_clk,
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clk => rx_clk,
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reset => reset,
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reset => reset,
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our_ip_address => our_ip_address,
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our_ip_address => our_ip_address,
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rx_pkt_count => rx_pkt_count,
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rx_pkt_count => rx_pkt_count,
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mac_data_in => mac_data_in,
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mac_data_in => mac_data_in,
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mac_data_in_valid => mac_data_in_valid,
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mac_data_in_valid => mac_data_in_valid,
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mac_data_in_last => mac_data_in_last
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mac_data_in_last => mac_data_in_last
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);
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);
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end structural;
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end structural;
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