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