Subversion Repositories or1k

//////////////////////////////////////////////////////////////////////
////                                                              ////
////  OR1200's Load/Store unit                                    ////
////                                                              ////
////  This file is part of the OpenRISC 1200 project              ////
////  http://www.opencores.org/cores/or1k/                        ////
////                                                              ////
////  Description                                                 ////
////  Interface between CPU and DC.                               ////
////                                                              ////
////  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                     ////
////                                                              ////
//////////////////////////////////////////////////////////////////////
//
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.1.1.1  2001/10/06 10:18:36  igorm
// no message
//
// Revision 1.2  2001/08/09 13:39:33  lampret
// Major clean-up.
//
// Revision 1.1  2001/07/20 00:46:03  lampret
// Development version of RTL. Libraries are missing.
//
//
 
// synopsys translate_off
`include "timescale.v"
// synopsys translate_on
`include "defines.v"
 
module lsu(
	// Clock and reset
	clk, rst,
 
	// Internal i/f
	addrbase, addrofs, lsu_op, lsu_datain, lsu_dataout, lsu_stall,
 
	// External i/f to DC
	dc_stall, dc_addr, dc_datain, dc_dataout, dc_lsuop
);
 
parameter dw = `OPERAND_WIDTH;
parameter aw = `REGFILE_ADDR_WIDTH;
 
//
// I/O
//
 
//
// Clock and reset
//
input				clk;
input				rst;
 
//
// Internal i/f
//
input	[31:0]			addrbase;
input	[31:0]			addrofs;
input	[`LSUOP_WIDTH-1:0]	lsu_op;
input	[dw-1:0]		lsu_datain;
output	[dw-1:0]		lsu_dataout;
output				lsu_stall;
 
//
// External i/f to DC
//
input				dc_stall;
output	[31:0]			dc_addr;
input	[dw-1:0]		dc_datain;
output	[dw-1:0]		dc_dataout;
output	[`LSUOP_WIDTH-1:0]	dc_lsuop;
 
//
// Not much of a LSU right now
//
assign dc_addr = addrbase + addrofs;
assign dc_dataout = lsu_datain;
assign lsu_dataout = dc_datain;
assign lsu_stall = dc_stall;
assign dc_lsuop = lsu_op;
 
endmodule