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-------------------------------------------------------------------------------
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-- Title : Packet Codec MK2
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-- Project :
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-------------------------------------------------------------------------------
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-- File : pkt_codec_mk2.vhd
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-- Author : Lasse Lehtonen
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-- Company :
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-- Created : 2011-01-12
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-- Last update: 2011-12-02
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-- Platform :
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-- Standard : VHDL'93
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-------------------------------------------------------------------------------
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-- Description: Helps connecting IPs to network-on-chip
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--
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-- Contains 4 sub-blocks: clk domain crossing (cdc) and 3 units for handling
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-- the addresses.
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--
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-- Generics
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--
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-- address_mode_g 0 : IP gives raw network address
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-- address_mode_g 1 : IP gives integer ID numbers as target address
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-- address_mode_g 2 : IP gives memory mapped addresses
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--
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-- clock_mode_g 0 : Use one clock for both ip and the net
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-- (clk_ip must be same as clk_net)
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-- clock_mode_g 1 : Use two asynchronous clocks
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--
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-- noc_type_g 0 : ase_noc
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-- noc_type_g 1 : ase_mesh1
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--
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-------------------------------------------------------------------------------
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-- Copyright (c) 2011
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-------------------------------------------------------------------------------
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-- Revisions :
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-- Date Version Author Description
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-- 2011-01-12 1.0 ase Created
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-------------------------------------------------------------------------------
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library ieee;
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use ieee.std_logic_1164.all;
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use ieee.numeric_std.all;
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use work.ase_noc_pkg.all;
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use work.ase_mesh1_pkg.all;
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entity pkt_codec_mk2 is
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generic (
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my_id_g : natural;
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data_width_g : positive; -- in bits
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cmd_width_g : positive; -- in bits
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agents_g : positive; -- total num of agents
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cols_g : positive; -- noc size in x dimension
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rows_g : positive; -- noc size in y dimension
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agent_ports_g : positive;
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addr_flit_en_g : natural; -- put addr from IP to 2nd flit of pkt?
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address_mode_g : natural; -- 3 choices: 0-2
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clock_mode_g : natural; -- 0: synchr, 1= clk_ip differs from clk_net
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rip_addr_g : natural; -- remove noc addr at the receiver?
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noc_type_g : natural
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);
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port (
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clk_ip : in std_logic;
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clk_net : in std_logic;
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rst_n : in std_logic;
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-- IP read interface
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ip_cmd_out : out std_logic_vector(cmd_width_g-1 downto 0);
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ip_data_out : out std_logic_vector(data_width_g-1 downto 0);
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ip_stall_in : in std_logic;
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-- IP write interface
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ip_cmd_in : in std_logic_vector(cmd_width_g-1 downto 0);
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ip_data_in : in std_logic_vector(data_width_g-1 downto 0);
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ip_stall_out : out std_logic;
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-- NoC write interface
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net_cmd_out : out std_logic_vector(cmd_width_g-1 downto 0);
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net_data_out : out std_logic_vector(data_width_g-1 downto 0);
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net_stall_in : in std_logic;
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-- NoC read interface
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net_cmd_in : in std_logic_vector(cmd_width_g-1 downto 0);
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net_data_in : in std_logic_vector(data_width_g-1 downto 0);
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net_stall_out : out std_logic
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);
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end entity pkt_codec_mk2;
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architecture structural of pkt_codec_mk2 is
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-----------------------------------------------------------------------------
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-- SIGNALS
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-----------------------------------------------------------------------------
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-- from ip to net path
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-- cdc -> at
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signal net_cmd_from_cdc : std_logic_vector(cmd_width_g-1 downto 0);
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signal net_data_from_cdc : std_logic_vector(data_width_g-1 downto 0);
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signal net_stall_to_cdc : std_logic;
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-- at -> ag
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signal net_cmd_from_at : std_logic_vector(cmd_width_g-1 downto 0);
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signal net_data_from_at : std_logic_vector(data_width_g-1 downto 0);
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signal net_stall_to_at : std_logic;
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signal orig_addr_from_at : std_logic_vector(data_width_g-1 downto 0);
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-- from net to ip path
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-- ar -> cdc
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signal ip_cmd_from_ar : std_logic_vector(cmd_width_g-1 downto 0);
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signal ip_data_from_ar : std_logic_vector(data_width_g-1 downto 0);
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signal ip_stall_to_ar : std_logic;
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-------------------------------------------------------------------------------
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begin -- architecture structural
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-------------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- CLOCK DOMAIN CROSSING (cdc) at both ends (sender + receiver)
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-----------------------------------------------------------------------------
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cdc_1 : entity work.cdc
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generic map (
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cmd_width_g => cmd_width_g,
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data_width_g => data_width_g,
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clock_mode_g => clock_mode_g
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)
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port map (
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clk_ip => clk_ip,
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clk_net => clk_net,
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rst_n => rst_n,
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ip_cmd_out => ip_cmd_out,
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ip_data_out => ip_data_out,
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ip_stall_in => ip_stall_in,
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ip_cmd_in => ip_cmd_in,
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ip_data_in => ip_data_in,
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ip_stall_out => ip_stall_out,
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net_cmd_out => net_cmd_from_cdc,
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net_data_out => net_data_from_cdc,
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net_stall_in => net_stall_to_cdc,
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net_cmd_in => ip_cmd_from_ar,
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net_data_in => ip_data_from_ar,
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net_stall_out => ip_stall_to_ar);
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-----------------------------------------------------------------------------
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-- ADDRESS TRANSLATION (only at sender side, i.e. from IP to NET)
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-----------------------------------------------------------------------------
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addr_translation_1 : entity work.addr_translation
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generic map (
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my_id_g => my_id_g,
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cmd_width_g => cmd_width_g,
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data_width_g => data_width_g,
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address_mode_g => address_mode_g,
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cols_g => cols_g,
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rows_g => rows_g,
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agents_g => agents_g,
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agent_ports_g => agent_ports_g,
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addr_flit_en_g => addr_flit_en_g,
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noc_type_g => noc_type_g
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)
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port map (
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clk => clk_net,
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rst_n => rst_n,
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ip_cmd_in => net_cmd_from_cdc,
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ip_data_in => net_data_from_cdc,
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ip_stall_out => net_stall_to_cdc,
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net_cmd_out => net_cmd_from_at,
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net_data_out => net_data_from_at,
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net_stall_in => net_stall_to_at,
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orig_addr_out => orig_addr_from_at
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);
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-----------------------------------------------------------------------------
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-- ADDRESS GENERATOR (only at sender side, i.e. from IP to NET)
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-----------------------------------------------------------------------------
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addr_gen_1 : entity work.addr_gen
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generic map (
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cmd_width_g => cmd_width_g,
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data_width_g => data_width_g,
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addr_flit_en_g => addr_flit_en_g
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)
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port map (
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clk => clk_net,
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rst_n => rst_n,
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ip_cmd_in => net_cmd_from_at,
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ip_data_in => net_data_from_at,
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ip_stall_out => net_stall_to_at,
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orig_addr_in => orig_addr_from_at,
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net_cmd_out => net_cmd_out,
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net_data_out => net_data_out,
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net_stall_in => net_stall_in
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);
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-----------------------------------------------------------------------------
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-- ADDRESS RIPPER / REPLACER (only at receiver side, i.e. from NET to IP)
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-----------------------------------------------------------------------------
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addr_rip_1 : entity work.addr_rip
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generic map (
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cmd_width_g => cmd_width_g,
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data_width_g => data_width_g,
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addr_flit_en_g => addr_flit_en_g,
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rip_addr_g => rip_addr_g
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)
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port map (
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clk => clk_net,
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rst_n => rst_n,
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net_cmd_in => net_cmd_in,
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net_data_in => net_data_in,
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net_stall_out => net_stall_out,
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ip_cmd_out => ip_cmd_from_ar,
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ip_data_out => ip_data_from_ar,
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ip_stall_in => ip_stall_to_ar);
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end architecture structural;
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