//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Tubo 8051 cores MAC Interface Module ////
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//// Tubo 8051 cores MAC Interface Module ////
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//// ////
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//// ////
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//// This file is part of the Turbo 8051 cores project ////
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//// This file is part of the Turbo 8051 cores project ////
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//// http://www.opencores.org/cores/turbo8051/ ////
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//// http://www.opencores.org/cores/turbo8051/ ////
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//// ////
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//// ////
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//// Description ////
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//// Description ////
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//// Turbo 8051 definitions. ////
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//// Turbo 8051 definitions. ////
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//// ////
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//// ////
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//// To Do: ////
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//// To Do: ////
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//// nothing ////
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//// nothing ////
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//// ////
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//// ////
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//// Author(s): ////
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//// Author(s): ////
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//// - Dinesh Annayya, dinesha@opencores.org ////
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//// - Dinesh Annayya, dinesha@opencores.org ////
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//// ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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//// ////
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//// ////
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//// Copyright (C) 2000 Authors and OPENCORES.ORG ////
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//// Copyright (C) 2000 Authors and OPENCORES.ORG ////
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//// ////
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//// ////
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//// This source file may be used and distributed without ////
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//// This source file may be used and distributed without ////
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//// restriction provided that this copyright statement is not ////
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//// restriction provided that this copyright statement is not ////
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//// removed from the file and that any derivative work contains ////
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//// removed from the file and that any derivative work contains ////
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//// the original copyright notice and the associated disclaimer. ////
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//// the original copyright notice and the associated disclaimer. ////
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//// ////
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//// ////
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//// This source file is free software; you can redistribute it ////
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//// This source file is free software; you can redistribute it ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// and/or modify it under the terms of the GNU Lesser General ////
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//// Public License as published by the Free Software Foundation; ////
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//// Public License as published by the Free Software Foundation; ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// either version 2.1 of the License, or (at your option) any ////
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//// later version. ////
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//// later version. ////
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//// ////
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//// ////
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//// This source is distributed in the hope that it will be ////
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//// This source is distributed in the hope that it will be ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// PURPOSE. See the GNU Lesser General Public License for more ////
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//// details. ////
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//// details. ////
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//// ////
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//// ////
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//// You should have received a copy of the GNU Lesser General ////
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//// You should have received a copy of the GNU Lesser General ////
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//// Public License along with this source; if not, download it ////
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//// Public License along with this source; if not, download it ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// from http://www.opencores.org/lgpl.shtml ////
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//// ////
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//// ////
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//////////////////////////////////////////////////////////////////////
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//////////////////////////////////////////////////////////////////////
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// ------------------------------------------------------------------------
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// ------------------------------------------------------------------------
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// Description :
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// Description :
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// This module instantiates the Eth/Arp/IP/TCP/UDP Packet Parser
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// This module instantiates the Eth/Arp/IP/TCP/UDP Packet Parser
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//
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//
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// ------------------------------------------------------------------------
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// ------------------------------------------------------------------------
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module g_eth_parser (
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module g_eth_parser (
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s_reset_n,
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s_reset_n,
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app_clk,
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app_clk,
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// Configuration
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// Configuration
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cfg_filters,
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cfg_filters,
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cfg_mac_sa,
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cfg_mac_sa,
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cfg_ip_sa,
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cfg_ip_sa,
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|
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// Input Control Information
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// Input Control Information
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eop,
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eop,
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dval,
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dval,
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data,
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data,
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|
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// output status
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// output status
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pkt_done,
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pkt_done,
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pkt_len,
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pkt_len,
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pkt_status,
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pkt_status,
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pkt_drop_ind,
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pkt_drop_ind,
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pkt_drop_reason
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pkt_drop_reason
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);
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);
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|
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//------------------------------
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//------------------------------
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// Global Input signal
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// Global Input signal
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//------------------------------
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//------------------------------
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input s_reset_n; // Active low reset signal
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input s_reset_n; // Active low reset signal
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input app_clk ; // Application clock
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input app_clk ; // Application clock
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|
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//------------------------------
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//------------------------------
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// Configuration
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// Configuration
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//------------------------------
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//------------------------------
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input [31:0] cfg_filters; // Filter rules
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input [31:0] cfg_filters; // Filter rules
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// [0] - filtering enabled
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// [0] - filtering enabled
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// [1] - allow local mac-da only
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// [1] - allow local mac-da only
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// [2] - allow local mac-da only + IP4 local ip-da
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// [2] - allow local mac-da only + IP4 local ip-da
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// [3] - allow local mac-da only + IP4 local ip-da + TCP
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// [3] - allow local mac-da only + IP4 local ip-da + TCP
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// [4] - allow local mac-da only + IP4 local ip-da + UDP
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// [4] - allow local mac-da only + IP4 local ip-da + UDP
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// [5] - allow local mac-da only + IP4 local ip-da + ICMP
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// [5] - allow local mac-da only + IP4 local ip-da + ICMP
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// [6] - allow local mac-da only + ARP
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// [6] - allow local mac-da only + ARP
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|
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input [47:0] cfg_mac_sa; // 48 bit mac DA
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input [47:0] cfg_mac_sa; // 48 bit mac DA
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input [31:0] cfg_ip_sa; // 32 bit IP DA
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input [31:0] cfg_ip_sa; // 32 bit IP DA
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|
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//---------------------------
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//---------------------------
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// Input Control Information
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// Input Control Information
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//---------------------------
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//---------------------------
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input eop;
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input eop;
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input dval;
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input dval;
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input [7:0] data;
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input [7:0] data;
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|
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//-----------------------------
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//-----------------------------
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// output status
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// output status
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//-----------------------------
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//-----------------------------
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output [11:0] pkt_len; // Packet Length
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output [11:0] pkt_len; // Packet Length
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output pkt_done; // Packet Processing done indication
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output pkt_done; // Packet Processing done indication
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output [15:0] pkt_status; // packet processing status
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output [15:0] pkt_status; // packet processing status
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// [1:0] - MAC-DA
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// [1:0] - MAC-DA
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// 2'b00 - Broadcast frame
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// 2'b00 - Broadcast frame
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// 2'b01 - Multicast frame
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// 2'b01 - Multicast frame
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// 2'b10 - unicast frame, other than local DA
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// 2'b10 - unicast frame, other than local DA
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// 2'b11 - unicast local DA frame
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// 2'b11 - unicast local DA frame
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// [3:2] - MAC-SA
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// [3:2] - MAC-SA
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// 2'b00 - Broadcast frame
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// 2'b00 - Broadcast frame
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// 2'b01 - Multicast frame
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// 2'b01 - Multicast frame
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// 2'b10 - unicast frame, other than local DA
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// 2'b10 - unicast frame, other than local DA
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// 2'b11 - unicast local DA frame
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// 2'b11 - unicast local DA frame
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// [6:4] - 3'b000 - Unknown Ethernet frame
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// [6:4] - 3'b000 - Unknown Ethernet frame
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// 3'b001 - IP4 Frame
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// 3'b001 - IP4 Frame
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// 3'b010 - IP4 Frame + TCP
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// 3'b010 - IP4 Frame + TCP
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// 3'b011 - IP4 Frame + UDP
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// 3'b011 - IP4 Frame + UDP
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// 3'b100 - IP4 Frame + ICMP
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// 3'b100 - IP4 Frame + ICMP
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// 3'b101 - ARP frame
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// 3'b101 - ARP frame
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output pkt_drop_ind; // Packet Drop Inidcation
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output pkt_drop_ind; // Packet Drop Inidcation
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output [7:0] pkt_drop_reason; // Reason for Frame Drop
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output [7:0] pkt_drop_reason; // Reason for Frame Drop
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// [0] - Non Local DA
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// [0] - Non Local DA
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// [1] - Local DA == Remote SA
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// [1] - Local DA == Remote SA
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// [2] - Non Local IP-DA
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// [2] - Non Local IP-DA
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// [3] - Local IP-DA == Remote IP-SA
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// [3] - Local IP-DA == Remote IP-SA
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// [4] - Not Valid IP4/TCP/UDP/ARP/ICMP Frame
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// [4] - Not Valid IP4/TCP/UDP/ARP/ICMP Frame
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// [5] - L2 Check sum error
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// [5] - L2 Check sum error
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// [6] - L3 Check Sum Error
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// [6] - L3 Check Sum Error
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// [7] - L4 Check Sum Error
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// [7] - L4 Check Sum Error
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|
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reg [11:0] bcnt ; // Byte counter
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reg [11:0] bcnt ; // Byte counter
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reg [11:0] pkt_len ; // packet length
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reg [11:0] pkt_len ; // packet length
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reg pkt_done ; // packet complete indication + Packet Status Valid
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reg pkt_done ; // packet complete indication + Packet Status Valid
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reg pkt_drop_ind ;
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reg pkt_drop_ind ;
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always @(s_reset_n or posedge app_clk) begin
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always @(negedge s_reset_n or posedge app_clk) begin
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if(s_reset_n == 1'b0) begin
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if(s_reset_n == 1'b0) begin
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bcnt <= 0;
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bcnt <= 0;
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pkt_len <= 0;
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pkt_len <= 0;
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pkt_done <= 0;
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pkt_done <= 0;
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pkt_drop_ind <= 0;
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pkt_drop_ind <= 0;
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end
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end
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else begin
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else begin
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if(dval) begin
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if(dval) begin
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if(eop) begin
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if(eop) begin
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bcnt <= 0;
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bcnt <= 0;
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pkt_len <= bcnt +1;
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pkt_len <= bcnt +1;
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pkt_done <= 1;
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pkt_done <= 1;
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end else begin
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end else begin
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bcnt <= bcnt +1;
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bcnt <= bcnt +1;
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pkt_done <= 0;
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pkt_done <= 0;
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end
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end
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end else begin
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end else begin
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pkt_done <= 0;
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pkt_done <= 0;
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end
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end
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end
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end
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end
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end
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reg mac_da_bc ; // frame da is broad cast
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reg mac_da_bc ; // frame da is broad cast
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reg mac_da_mc ; // frame da is multicast
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reg mac_da_mc ; // frame da is multicast
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reg mac_da_match ; // frame da match to local address
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reg mac_da_match ; // frame da match to local address
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reg mac_sa_bc ; // frame sa is broadcast
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reg mac_sa_bc ; // frame sa is broadcast
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reg mac_sa_mc ; // frame sa is multicast
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reg mac_sa_mc ; // frame sa is multicast
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reg mac_sa_match ; // frame sa match to local address
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reg mac_sa_match ; // frame sa match to local address
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reg ipv4f ; // frame is ipv4
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reg ipv4f ; // frame is ipv4
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reg arpf ; // frame is arp
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reg arpf ; // frame is arp
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reg tcpf ; // frame is tcp
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reg tcpf ; // frame is tcp
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reg udpf ; // frame is udp
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reg udpf ; // frame is udp
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reg ip_sa_match ; // ip4 sa matches to local IP Address
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reg ip_sa_match ; // ip4 sa matches to local IP Address
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reg ip_da_match ; // ip4 da matches to local IP Address
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reg ip_da_match ; // ip4 da matches to local IP Address
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reg[15:0] pkt_status ; // Packet Status
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reg[15:0] pkt_status ; // Packet Status
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always @(s_reset_n or posedge app_clk) begin
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always @(negedge s_reset_n or posedge app_clk) begin
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if(s_reset_n == 1'b0) begin
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if(s_reset_n == 1'b0) begin
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mac_da_bc <= 0;
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mac_da_bc <= 0;
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mac_da_mc <= 0;
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mac_da_mc <= 0;
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mac_da_match <= 0;
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mac_da_match <= 0;
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mac_sa_bc <= 0;
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mac_sa_bc <= 0;
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mac_sa_mc <= 0;
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mac_sa_mc <= 0;
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mac_sa_match <= 0;
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mac_sa_match <= 0;
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ipv4f <= 0;
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ipv4f <= 0;
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arpf <= 0;
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arpf <= 0;
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tcpf <= 0;
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tcpf <= 0;
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udpf <= 0;
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udpf <= 0;
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ip_sa_match <= 0;
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ip_sa_match <= 0;
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ip_da_match <= 0;
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ip_da_match <= 0;
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pkt_status <= 0;
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pkt_status <= 0;
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end
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end
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else begin
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else begin
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if(dval) begin
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if(dval) begin
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if(!eop) begin
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if(!eop) begin
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// DA Analysis
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// DA Analysis
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// Broadcast Frame
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// Broadcast Frame
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mac_da_bc <= (bcnt == 0) ? (data == 8'hff) :
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mac_da_bc <= (bcnt == 0) ? (data == 8'hff) :
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(bcnt == 1) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 1) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 2) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 2) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 3) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 3) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 4) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 4) ? (data == 8'hff) & mac_da_bc :
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(bcnt == 5) ? (data == 8'hff) & mac_da_bc : mac_da_bc;
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(bcnt == 5) ? (data == 8'hff) & mac_da_bc : mac_da_bc;
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// multicast frame
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// multicast frame
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mac_da_mc <= (bcnt == 0) ? (data[7] == 1'b1) : mac_da_mc & !mac_da_bc;
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mac_da_mc <= (bcnt == 0) ? (data[7] == 1'b1) : mac_da_mc & !mac_da_bc;
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// local unicast frame
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// local unicast frame
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mac_da_match <= (bcnt == 0) ? (cfg_mac_sa[7:0] == data) :
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mac_da_match <= (bcnt == 0) ? (cfg_mac_sa[7:0] == data) :
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(bcnt == 1) ? (cfg_mac_sa[15:8] == data) & mac_da_match :
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(bcnt == 1) ? (cfg_mac_sa[15:8] == data) & mac_da_match :
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(bcnt == 2) ? (cfg_mac_sa[23:16] == data) & mac_da_match :
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(bcnt == 2) ? (cfg_mac_sa[23:16] == data) & mac_da_match :
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(bcnt == 3) ? (cfg_mac_sa[31:24] == data) & mac_da_match :
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(bcnt == 3) ? (cfg_mac_sa[31:24] == data) & mac_da_match :
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(bcnt == 4) ? (cfg_mac_sa[39:32] == data) & mac_da_match :
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(bcnt == 4) ? (cfg_mac_sa[39:32] == data) & mac_da_match :
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(bcnt == 5) ? (cfg_mac_sa[47:40] == data) & mac_da_match :
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(bcnt == 5) ? (cfg_mac_sa[47:40] == data) & mac_da_match :
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mac_da_match;
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mac_da_match;
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|
|
|
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// SA Analysis
|
// SA Analysis
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mac_sa_bc <= (bcnt == 6) ? (data == 8'hff) :
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mac_sa_bc <= (bcnt == 6) ? (data == 8'hff) :
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(bcnt == 7) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 7) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 8) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 8) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 9) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 9) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 10) ? (data == 8'hff) & mac_sa_bc :
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(bcnt == 10) ? (data == 8'hff) & mac_sa_bc :
|
(bcnt == 11) ? (data == 8'hff) & mac_sa_bc : mac_sa_bc;
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(bcnt == 11) ? (data == 8'hff) & mac_sa_bc : mac_sa_bc;
|
|
|
mac_sa_mc <= (bcnt == 6) ? (data[7] == 1'b1) : mac_sa_mc & !mac_sa_bc;
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mac_sa_mc <= (bcnt == 6) ? (data[7] == 1'b1) : mac_sa_mc & !mac_sa_bc;
|
|
|
mac_sa_match <= (bcnt == 6) ? (cfg_mac_sa[7:0] == data) :
|
mac_sa_match <= (bcnt == 6) ? (cfg_mac_sa[7:0] == data) :
|
(bcnt == 7) ? (cfg_mac_sa[15:8] == data) & mac_sa_match :
|
(bcnt == 7) ? (cfg_mac_sa[15:8] == data) & mac_sa_match :
|
(bcnt == 8) ? (cfg_mac_sa[23:16] == data) & mac_sa_match :
|
(bcnt == 8) ? (cfg_mac_sa[23:16] == data) & mac_sa_match :
|
(bcnt == 9) ? (cfg_mac_sa[31:24] == data) & mac_sa_match :
|
(bcnt == 9) ? (cfg_mac_sa[31:24] == data) & mac_sa_match :
|
(bcnt == 10) ? (cfg_mac_sa[39:32] == data) & mac_sa_match :
|
(bcnt == 10) ? (cfg_mac_sa[39:32] == data) & mac_sa_match :
|
(bcnt == 11) ? (cfg_mac_sa[47:40] == data) & mac_sa_match :
|
(bcnt == 11) ? (cfg_mac_sa[47:40] == data) & mac_sa_match :
|
mac_sa_match;
|
mac_sa_match;
|
|
|
// L3 Protocol Analysis
|
// L3 Protocol Analysis
|
ipv4f <= (bcnt == 12) ? (data == 8'h08) :
|
ipv4f <= (bcnt == 12) ? (data == 8'h08) :
|
(bcnt == 13) ? (data == 8'h00) & ipv4f : ipv4f;
|
(bcnt == 13) ? (data == 8'h00) & ipv4f : ipv4f;
|
|
|
arpf <= (bcnt == 12) ? (data == 8'h08) :
|
arpf <= (bcnt == 12) ? (data == 8'h08) :
|
(bcnt == 13) ? (data == 8'h06) & arpf : arpf;
|
(bcnt == 13) ? (data == 8'h06) & arpf : arpf;
|
// L4 Protocol Analysis
|
// L4 Protocol Analysis
|
tcpf <= (bcnt == 23) ? (data == 8'h06) & ipv4f: tcpf;
|
tcpf <= (bcnt == 23) ? (data == 8'h06) & ipv4f: tcpf;
|
udpf <= (bcnt == 23) ? (data == 8'h11) & ipv4f: udpf;
|
udpf <= (bcnt == 23) ? (data == 8'h11) & ipv4f: udpf;
|
// IP DA and SA Match
|
// IP DA and SA Match
|
ip_sa_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:
|
ip_sa_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:
|
(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_sa_match:
|
(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_sa_match:
|
(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_sa_match:
|
(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_sa_match:
|
(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_sa_match:
|
(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_sa_match:
|
ip_sa_match;
|
ip_sa_match;
|
ip_da_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:
|
ip_da_match <= (bcnt == 26) ? (data == cfg_ip_sa[7:0]) & ipv4f:
|
(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_da_match:
|
(bcnt == 27) ? (data == cfg_ip_sa[15:8]) & ipv4f & ip_da_match:
|
(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_da_match:
|
(bcnt == 28) ? (data == cfg_ip_sa[23:16]) & ipv4f & ip_da_match:
|
(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_da_match:
|
(bcnt == 29) ? (data == cfg_ip_sa[31:24]) & ipv4f & ip_da_match:
|
ip_da_match;
|
ip_da_match;
|
|
|
end else begin // on EOP
|
end else begin // on EOP
|
|
|
if(&mac_da_match) begin
|
if(&mac_da_match) begin
|
pkt_status[1:0] <= 2'b11; // Local DA
|
pkt_status[1:0] <= 2'b11; // Local DA
|
end else if(mac_da_bc) begin
|
end else if(mac_da_bc) begin
|
pkt_status[1:0] <= 2'b00; // Broadcast frame
|
pkt_status[1:0] <= 2'b00; // Broadcast frame
|
end else if(mac_da_mc) begin
|
end else if(mac_da_mc) begin
|
pkt_status[1:0] <= 2'b01; // Multicase frame
|
pkt_status[1:0] <= 2'b01; // Multicase frame
|
end else
|
end else
|
pkt_status[1:0] <= 2'b10; // Unknown Unicast frame
|
pkt_status[1:0] <= 2'b10; // Unknown Unicast frame
|
|
|
if(&mac_sa_match) begin
|
if(&mac_sa_match) begin
|
pkt_status[3:2] <= 2'b11; // Local DA
|
pkt_status[3:2] <= 2'b11; // Local DA
|
end else if(mac_sa_bc) begin
|
end else if(mac_sa_bc) begin
|
pkt_status[3:2] <= 2'b00; // Broadcast frame
|
pkt_status[3:2] <= 2'b00; // Broadcast frame
|
end else if(mac_sa_mc) begin
|
end else if(mac_sa_mc) begin
|
pkt_status[3:2] <= 2'b01; // Multicast frame
|
pkt_status[3:2] <= 2'b01; // Multicast frame
|
end else
|
end else
|
pkt_status[3:2] <= 2'b10; // Unknown Unicast frame
|
pkt_status[3:2] <= 2'b10; // Unknown Unicast frame
|
|
|
if(tcpf) begin
|
if(tcpf) begin
|
pkt_status[6:4] <= 3'b010; // IP4 Frame + TCP
|
pkt_status[6:4] <= 3'b010; // IP4 Frame + TCP
|
end else if(udpf) begin
|
end else if(udpf) begin
|
pkt_status[6:4] <= 3'b011; // IP4 Frame + UDP
|
pkt_status[6:4] <= 3'b011; // IP4 Frame + UDP
|
end else if(arpf) begin
|
end else if(arpf) begin
|
pkt_status[6:4] <= 3'b101; // ARP frame
|
pkt_status[6:4] <= 3'b101; // ARP frame
|
end else
|
end else
|
pkt_status[6:4] <= 2'b00; // UnKnown Ethernet frame
|
pkt_status[6:4] <= 2'b00; // UnKnown Ethernet frame
|
|
|
mac_da_match <= 0;
|
mac_da_match <= 0;
|
mac_sa_match <= 0;
|
mac_sa_match <= 0;
|
mac_sa_bc <= 0;
|
mac_sa_bc <= 0;
|
mac_sa_mc <= 0;
|
mac_sa_mc <= 0;
|
mac_da_bc <= 0;
|
mac_da_bc <= 0;
|
mac_da_mc <= 0;
|
mac_da_mc <= 0;
|
|
tcpf <= 0;
|
|
udpf <= 0;
|
|
arpf <= 0;
|
|
ipv4f <= 0;
|
end
|
end
|
end
|
end
|
end
|
end
|
end
|
end
|
|
|
|
|
endmodule
|
endmodule
|
|
|