Subversion Repositories raptor64

`timescale 1ns / 1ps

//=============================================================================

//        __

//   \\__/ o\    (C) 2013  Robert Finch

//    \  __ /    All rights reserved.

//     \/_//     robfinch<remove>@opencores.org

//       ||

//  

//      Raptor64_icache_ram.v

//

//  

// 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 3 of the License, or     

// (at your option) any later version.                                      

//                                                                          

// This source file 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 General Public License for more details.                             

//                                                                          

// You should have received a copy of the GNU General Public License        

// along with this program.  If not, see <http://www.gnu.org/licenses/>.    

//                                                                          

//

//=============================================================================

//

module Raptor64_icache_ram(wclk, we, adr, d, rclk, pc, insn);

input wclk;

input we;

input [13:0] adr;

input [63:0] d;

input rclk;

input [13:0] pc;

output [31:0] insn;

reg [31:0] ramLo [0:2047];

reg [31:0] ramHi [0:2047];

reg [13:2] radr;

always @(posedge wclk)

        if (we) begin

                ramLo[adr[13:3]] <= d[31: 0];

                ramHi[adr[13:3]] <= d[63:32];

        end

always @(posedge rclk)

        radr <= pc[13:2];

assign insn = radr[2] ? ramHi[radr[13:3]] : ramLo[radr[13:3]];

endmodule