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//////////////////////////////////////////////////////////////////////

////                                                              ////

////  OR1200's DC TAG RAMs                                        ////

////                                                              ////

////  This file is part of the OpenRISC 1200 project              ////

////  http://opencores.org/project,or1k                           ////

////                                                              ////

////  Description                                                 ////

////  Instatiation of data cache tag rams.                        ////

////                                                              ////

////  To Do:                                                      ////

////   - make it smaller and faster                               ////

////                                                              ////

////  Author(s):                                                  ////

////      - Damjan Lampret, lampret@opencores.org                 ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

////                                                              ////

//// Copyright (C) 2000 Authors and OPENCORES.ORG                 ////

////                                                              ////

//// 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                     ////

////                                                              ////

//////////////////////////////////////////////////////////////////////

//

// $Log: or1200_dc_tag.v,v $

// Revision 2.0  2010/06/30 11:00:00  ORSoC

// Minor update: 

// Coding style changed.

//

// synopsys translate_off

`include "timescale.v"

// synopsys translate_on

`include "or1200_defines.v"

module or1200_dc_tag(

        // Clock and reset

        clk, rst,

`ifdef OR1200_BIST

        // RAM BIST

        mbist_si_i, mbist_so_o, mbist_ctrl_i,

`endif

        // Internal i/f

        addr, en, we, datain, tag_v, tag, dirty

);

parameter dw = `OR1200_DCTAG_W+1;

parameter aw = `OR1200_DCTAG;

//

// I/O

//

input                           clk;

input                           rst;

input   [aw-1:0]         addr;

input                           en;

input                           we;

input   [dw-1:0]         datain;

output                          tag_v;

output  [dw-3:0]         tag;

output                          dirty;

`ifdef OR1200_BIST

//

// RAM BIST

//

input mbist_si_i;

input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;

output mbist_so_o;

`endif

`ifdef OR1200_NO_DC

//

// Data cache not implemented

//

assign tag = {dw-1{1'b0}};

assign tag_v = 1'b0;

`ifdef OR1200_BIST

assign mbist_so_o = mbist_si_i;

`endif

`else

//

// Instantiation of TAG RAM block

//

`ifdef OR1200_DC_1W_4KB

   or1200_spram #

     (

      .aw(8),

      .dw(21 + 1)

      )

`endif

`ifdef OR1200_DC_1W_8KB

   or1200_spram #

     (

      .aw(9),

      .dw(20 + 1)

      )

`endif

   dc_tag0

     (

`ifdef OR1200_BIST

      // RAM BIST

      .mbist_si_i(mbist_si_i),

      .mbist_so_o(mbist_so_o),

      .mbist_ctrl_i(mbist_ctrl_i),

`endif

      .clk(clk),

      .ce(en),

      .we(we),

      .addr(addr),

      .di(datain),

      .doq({tag, tag_v, dirty})

      );

`endif

endmodule // or1200_dc_tag