diff options
Diffstat (limited to 'eth/rtl/verilog/RMON/RMON_addr_gen.v')
| -rw-r--r-- | eth/rtl/verilog/RMON/RMON_addr_gen.v | 295 |
1 files changed, 295 insertions, 0 deletions
diff --git a/eth/rtl/verilog/RMON/RMON_addr_gen.v b/eth/rtl/verilog/RMON/RMON_addr_gen.v new file mode 100644 index 000000000..9da8d1f80 --- /dev/null +++ b/eth/rtl/verilog/RMON/RMON_addr_gen.v @@ -0,0 +1,295 @@ +//////////////////////////////////////////////////////////////////////
+//// ////
+//// RMON_addr_gen.v ////
+//// ////
+//// This file is part of the Ethernet IP core project ////
+//// http://www.opencores.org/projects.cgi/web/ethernet_tri_mode/////
+//// ////
+//// Author(s): ////
+//// - Jon Gao (gaojon@yahoo.com) ////
+//// ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//// ////
+//// Copyright (C) 2001 Authors ////
+//// ////
+//// This source file may be used and distributed without ////
+//// restriction provided that this copyright statement is not ////
+//// removed from the file and that any derivative work contains ////
+//// the original copyright notice and the associated disclaimer. ////
+//// ////
+//// This source file is free software; you can redistribute it ////
+//// and/or modify it under the terms of the GNU Lesser General ////
+//// Public License as published by the Free Software Foundation; ////
+//// either version 2.1 of the License, or (at your option) any ////
+//// later version. ////
+//// ////
+//// This source is distributed in the hope that it will be ////
+//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
+//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
+//// PURPOSE. See the GNU Lesser General Public License for more ////
+//// details. ////
+//// ////
+//// You should have received a copy of the GNU Lesser General ////
+//// Public License along with this source; if not, download it ////
+//// from http://www.opencores.org/lgpl.shtml ////
+//// ////
+//////////////////////////////////////////////////////////////////////
+//
+// CVS Revision History
+//
+// $Log: RMON_addr_gen.v,v $
+// Revision 1.4 2006/06/25 04:58:57 maverickist
+// no message
+//
+// Revision 1.3 2006/01/19 14:07:55 maverickist
+// verification is complete.
+//
+// Revision 1.2 2005/12/16 06:44:19 Administrator
+// replaced tab with space.
+// passed 9.6k length frame test.
+//
+// Revision 1.1.1.1 2005/12/13 01:51:45 Administrator
+// no message
+//
+module RMON_addr_gen(
+Clk ,
+Reset ,
+//RMON
+Pkt_type_rmon ,
+Pkt_length_rmon ,
+Apply_rmon ,//pluse signal looks like eop
+Pkt_err_type_rmon ,
+//
+Reg_apply ,
+Reg_addr ,
+Reg_data ,
+Reg_next ,
+//CPU
+Reg_drop_apply
+);
+input Clk ;
+input Reset ;
+ //RMON
+input [2:0] Pkt_type_rmon ;
+input [15:0] Pkt_length_rmon ;
+input Apply_rmon ;//pluse signal looks like eop
+input [2:0] Pkt_err_type_rmon ;
+ //RMON_ctrl
+output Reg_apply ;
+output [4:0] Reg_addr ;
+output [15:0] Reg_data ;
+input Reg_next ;
+ //CPU
+output Reg_drop_apply ;
+
+//******************************************************************************
+//internal signals
+//******************************************************************************
+parameter StateIdle =4'd0;
+parameter StatePktLength =4'd1;
+parameter StatePktNumber =4'd2;
+parameter StatePktType =4'd3;
+parameter StatePktRange =4'd4;
+
+reg [3:0] CurrentState /* synthesys syn_keep=1 */;
+reg [3:0] NextState;
+
+reg [2:0] PktTypeReg ;
+reg [15:0] PktLengthReg ;
+reg [2:0] PktErrTypeReg ;
+
+reg Reg_apply ;
+reg [4:0] Reg_addr ;
+reg [15:0] Reg_data ;
+reg Reg_drop_apply ;
+//******************************************************************************
+//register boundery signals
+
+//******************************************************************************
+reg Apply_rmon_dl1;
+reg Apply_rmon_dl2;
+reg Apply_rmon_pulse;
+reg [2:0] Pkt_type_rmon_dl1 ;
+reg [15:0] Pkt_length_rmon_dl1 ;
+reg [2:0] Pkt_err_type_rmon_dl1 ;
+
+always @(posedge Clk or posedge Reset)
+ if (Reset)
+ begin
+ Pkt_type_rmon_dl1 <=0;
+ Pkt_length_rmon_dl1 <=0;
+ Pkt_err_type_rmon_dl1 <=0;
+ end
+ else
+ begin
+ Pkt_type_rmon_dl1 <=Pkt_type_rmon ;
+ Pkt_length_rmon_dl1 <=Pkt_length_rmon ;
+ Pkt_err_type_rmon_dl1 <=Pkt_err_type_rmon ;
+ end
+
+always @(posedge Clk or posedge Reset)
+ if (Reset)
+ begin
+ Apply_rmon_dl1 <=0;
+ Apply_rmon_dl2 <=0;
+ end
+ else
+ begin
+ Apply_rmon_dl1 <=Apply_rmon;
+ Apply_rmon_dl2 <=Apply_rmon_dl1;
+ end
+
+always @(Apply_rmon_dl1 or Apply_rmon_dl2)
+ if (Apply_rmon_dl1&!Apply_rmon_dl2)
+ Apply_rmon_pulse =1;
+ else
+ Apply_rmon_pulse =0;
+
+
+
+always @(posedge Clk or posedge Reset)
+ if (Reset)
+ begin
+ PktTypeReg <=0;
+ PktLengthReg <=0;
+ PktErrTypeReg <=0;
+ end
+ else if (Apply_rmon_pulse&&CurrentState==StateIdle)
+ begin
+ PktTypeReg <=Pkt_type_rmon_dl1 ;
+ PktLengthReg <=Pkt_length_rmon_dl1 ;
+ PktErrTypeReg <=Pkt_err_type_rmon_dl1 ;
+ end
+
+
+//******************************************************************************
+//State Machine
+//******************************************************************************
+always @(posedge Clk or posedge Reset)
+ if (Reset)
+ CurrentState <=StateIdle;
+ else
+ CurrentState <=NextState;
+
+always @(CurrentState or Apply_rmon_pulse or Reg_next)
+ case (CurrentState)
+ StateIdle:
+ if (Apply_rmon_pulse)
+ NextState =StatePktLength;
+ else
+ NextState =StateIdle;
+ StatePktLength:
+ if (Reg_next)
+ NextState =StatePktNumber;
+ else
+ NextState =CurrentState;
+ StatePktNumber:
+ if (Reg_next)
+ NextState =StatePktType;
+ else
+ NextState =CurrentState;
+ StatePktType:
+ if (Reg_next)
+ NextState =StatePktRange;
+ else
+ NextState =CurrentState;
+ StatePktRange:
+ if (Reg_next)
+ NextState =StateIdle;
+ else
+ NextState =CurrentState;
+ default:
+ NextState =StateIdle;
+ endcase
+
+//******************************************************************************
+//gen output signals
+//******************************************************************************
+//Reg_apply
+always @ (CurrentState)
+ if (CurrentState==StatePktLength||CurrentState==StatePktNumber||
+ CurrentState==StatePktType||CurrentState==StatePktRange)
+ Reg_apply =1;
+ else
+ Reg_apply =0;
+
+//Reg_addr
+always @ (posedge Clk or posedge Reset)
+ if (Reset)
+ Reg_addr <=0;
+ else case (CurrentState)
+ StatePktLength:
+ Reg_addr <=5'd00;
+ StatePktNumber:
+ Reg_addr <=5'd01;
+ StatePktType:
+ case(PktTypeReg)
+ 3'b011:
+ Reg_addr <=5'd02; //broadcast
+ 3'b001:
+ Reg_addr <=5'd03; //multicast
+ 3'b100:
+ Reg_addr <=5'd16; //pause frame
+ default:
+ Reg_addr <=5'd04; //unicast
+ endcase
+ StatePktRange:
+ case(PktErrTypeReg)
+ 3'b001:
+ Reg_addr <=5'd05;
+ 3'b010:
+ Reg_addr <=5'd06;
+ 3'b011:
+ Reg_addr <=5'd07;
+ 3'b100:
+ if (PktLengthReg<64)
+ Reg_addr <=5'd08;
+ else if (PktLengthReg==64)
+ Reg_addr <=5'd09;
+ else if (PktLengthReg<128)
+ Reg_addr <=5'd10;
+ else if (PktLengthReg<256)
+ Reg_addr <=5'd11;
+ else if (PktLengthReg<512)
+ Reg_addr <=5'd12;
+ else if (PktLengthReg<1024)
+ Reg_addr <=5'd13;
+ else if (PktLengthReg<1519)
+ Reg_addr <=5'd14;
+ else
+ Reg_addr <=5'd15;
+ default:
+ Reg_addr <=5'd05;
+ endcase
+ default:
+ Reg_addr <=5'd05;
+ endcase
+
+//Reg_data
+always @ (CurrentState or PktLengthReg)
+ case (CurrentState)
+ StatePktLength:
+ Reg_data =PktLengthReg;
+ StatePktNumber:
+ Reg_data =1;
+ StatePktType:
+ Reg_data =1;
+ StatePktRange:
+ Reg_data =1;
+ default:
+ Reg_data =0;
+ endcase
+
+//Reg_drop_apply
+always @ (posedge Clk or posedge Reset)
+ if (Reset)
+ Reg_drop_apply <=0;
+ else if (CurrentState!=StateIdle&&Apply_rmon_pulse)
+ Reg_drop_apply <=1;
+ else
+ Reg_drop_apply <=0;
+
+
+endmodule
+
|