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[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_spram_1024x8.v] - Blame information for rev 55

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//////////////////////////////////////////////////////////////////////
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////                                                              ////
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////  Generic Single-Port Synchronous RAM                         ////
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////                                                              ////
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////  This file is part of memory library available from          ////
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////  http://www.opencores.org/cvsweb.shtml/generic_memories/     ////
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////                                                              ////
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////  Description                                                 ////
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////  This block is a wrapper with common single-port             ////
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////  synchronous memory interface for different                  ////
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////  types of ASIC and FPGA RAMs. Beside universal memory        ////
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////  interface it also provides behavioral model of generic      ////
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////  single-port synchronous RAM.                                ////
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////  It should be used in all OPENCORES designs that want to be  ////
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////  portable accross different target technologies and          ////
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////  independent of target memory.                               ////
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////                                                              ////
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////  Supported ASIC RAMs are:                                    ////
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////  - Artisan Single-Port Sync RAM                              ////
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////  - Avant! Two-Port Sync RAM (*)                              ////
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////  - Virage Single-Port Sync RAM                               ////
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////  - Virtual Silicon Single-Port Sync RAM                      ////
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////                                                              ////
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////  Supported FPGA RAMs are:                                    ////
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////  - Xilinx Virtex RAMB16                                      ////
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////  - Xilinx Virtex RAMB4                                       ////
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////  - Altera LPM                                                ////
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////                                                              ////
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////  To Do:                                                      ////
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////   - xilinx rams need external tri-state logic                ////
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////   - fix avant! two-port ram                                  ////
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////   - add additional RAMs                                      ////
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////                                                              ////
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////  Author(s):                                                  ////
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////      - Damjan Lampret, lampret@opencores.org                 ////
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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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////                                                              ////
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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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//// 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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////                                                              ////
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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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//// 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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//// later version.                                               ////
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////                                                              ////
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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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//// 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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//// details.                                                     ////
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////                                                              ////
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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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//// from http://www.opencores.org/lgpl.shtml                     ////
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////                                                              ////
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//////////////////////////////////////////////////////////////////////
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//
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// CVS Revision History
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//
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// $Log: not supported by cvs2svn $
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// Revision 1.8  2004/06/08 18:15:32  lampret
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// Changed behavior of the simulation generic models
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//
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// Revision 1.7  2004/04/05 08:29:57  lampret
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// Merged branch_qmem into main tree.
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//
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// Revision 1.3.4.1  2003/12/09 11:46:48  simons
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// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
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//
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// Revision 1.3  2003/04/07 01:19:07  lampret
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// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
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//
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// Revision 1.2  2002/10/17 20:04:40  lampret
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// Added BIST scan. Special VS RAMs need to be used to implement BIST.
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//
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// Revision 1.1  2002/01/03 08:16:15  lampret
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// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
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//
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// Revision 1.8  2001/11/02 18:57:14  lampret
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// Modified virtual silicon instantiations.
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//
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// Revision 1.7  2001/10/21 17:57:16  lampret
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// Removed params from generic_XX.v. Added translate_off/on in sprs.v and id.v. Removed spr_addr from dc.v and ic.v. Fixed CR+LF.
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//
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// Revision 1.6  2001/10/14 13:12:09  lampret
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// MP3 version.
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//
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// Revision 1.1.1.1  2001/10/06 10:18:36  igorm
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// no message
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//
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// Revision 1.1  2001/08/09 13:39:33  lampret
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// Major clean-up.
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//
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// Revision 1.2  2001/07/30 05:38:02  lampret
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// Adding empty directories required by HDL coding guidelines
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//
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//
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// synopsys translate_off
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`include "timescale.v"
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// synopsys translate_on
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`include "or1200_defines.v"
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110
module or1200_spram_1024x8(
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`ifdef OR1200_BIST
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        // RAM BIST
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        mbist_si_i, mbist_so_o, mbist_ctrl_i,
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`endif
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        // Generic synchronous single-port RAM interface
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        clk, rst, ce, we, oe, addr, di, doq
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);
118
 
119
//
120
// Default address and data buses width
121
//
122
parameter aw = 10;
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parameter dw = 8;
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125
`ifdef OR1200_BIST
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//
127
// RAM BIST
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//
129
input mbist_si_i;
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input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
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output mbist_so_o;
132
`endif
133
 
134
//
135
// Generic synchronous single-port RAM interface
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//
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input                   clk;    // Clock
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input                   rst;    // Reset
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input                   ce;     // Chip enable input
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input                   we;     // Write enable input
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input                   oe;     // Output enable input
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input   [aw-1:0] addr;   // address bus inputs
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input   [dw-1:0] di;     // input data bus
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output  [dw-1:0] doq;    // output data bus
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146
//
147
// Internal wires and registers
148
//
149
 
150
`ifdef OR1200_ARTISAN_SSP
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`else
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`ifdef OR1200_VIRTUALSILICON_SSP
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`else
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`ifdef OR1200_BIST
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assign mbist_so_o = mbist_si_i;
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`endif
157
`endif
158
`endif
159
 
160
`ifdef OR1200_ARTISAN_SSP
161
 
162
//
163
// Instantiation of ASIC memory:
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//
165
// Artisan Synchronous Single-Port RAM (ra1sh)
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//
167
`ifdef UNUSED
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art_hssp_1024x8 #(dw, 1<<aw, aw) artisan_ssp(
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`else
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`ifdef OR1200_BIST
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art_hssp_1024x8_bist artisan_ssp(
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`else
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art_hssp_1024x8 artisan_ssp(
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`endif
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`endif
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`ifdef OR1200_BIST
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        // RAM BIST
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        .mbist_si_i(mbist_si_i),
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        .mbist_so_o(mbist_so_o),
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        .mbist_ctrl_i(mbist_ctrl_i),
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`endif
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        .CLK(clk),
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        .CEN(~ce),
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        .WEN(~we),
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        .A(addr),
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        .D(di),
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        .OEN(~oe),
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        .Q(doq)
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);
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191
`else
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`ifdef OR1200_AVANT_ATP
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//
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// Instantiation of ASIC memory:
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//
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// Avant! Asynchronous Two-Port RAM
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//
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avant_atp avant_atp(
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        .web(~we),
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        .reb(),
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        .oeb(~oe),
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        .rcsb(),
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        .wcsb(),
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        .ra(addr),
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        .wa(addr),
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        .di(di),
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        .doq(doq)
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);
211
 
212
`else
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`ifdef OR1200_VIRAGE_SSP
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//
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// Instantiation of ASIC memory:
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//
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// Virage Synchronous 1-port R/W RAM
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//
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virage_ssp virage_ssp(
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        .clk(clk),
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        .adr(addr),
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        .d(di),
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        .we(we),
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        .oe(oe),
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        .me(ce),
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        .q(doq)
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);
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231
`else
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`ifdef OR1200_VIRTUALSILICON_SSP
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//
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// Instantiation of ASIC memory:
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//
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// Virtual Silicon Single-Port Synchronous SRAM
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//
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`ifdef UNUSED
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vs_hdsp_1024x8 #(1<<aw, aw-1, dw-1) vs_ssp(
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`else
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`ifdef OR1200_BIST
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vs_hdsp_1024x8_bist vs_ssp(
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`else
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vs_hdsp_1024x8 vs_ssp(
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`endif
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`endif
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`ifdef OR1200_BIST
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        // RAM BIST
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        .mbist_si_i(mbist_si_i),
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        .mbist_so_o(mbist_so_o),
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        .mbist_ctrl_i(mbist_ctrl_i),
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`endif
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        .CK(clk),
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        .ADR(addr),
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        .DI(di),
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        .WEN(~we),
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        .CEN(~ce),
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        .OEN(~oe),
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        .DOUT(doq)
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);
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`else
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`ifdef OR1200_XILINX_RAMB4
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//
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// Instantiation of FPGA memory:
270
//
271
// Virtex/Spartan2
272
//
273
 
274
//
275
// Block 0
276
//
277
RAMB4_S4 ramb4_s4_0(
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        .CLK(clk),
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        .RST(rst),
280
        .ADDR(addr),
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        .DI(di[3:0]),
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        .EN(ce),
283
        .WE(we),
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        .DO(doq[3:0])
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);
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287
//
288
// Block 1
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//
290
RAMB4_S4 ramb4_s4_1(
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        .CLK(clk),
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        .RST(rst),
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        .ADDR(addr),
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        .DI(di[7:4]),
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        .EN(ce),
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        .WE(we),
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        .DO(doq[7:4])
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);
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300
`else
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`ifdef OR1200_XILINX_RAMB16
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//
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// Instantiation of FPGA memory:
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//
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// Virtex4/Spartan3E
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//
309
// Added By Nir Mor
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//
311
 
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RAMB16_S9 ramb16_s9(
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        .CLK(clk),
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        .SSR(rst),
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        .ADDR({1'b0,addr}),
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        .DI(di),
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        .DIP(1'b0),
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        .EN(ce),
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        .WE(we),
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        .DO(doq),
321
        .DOP()
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);
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324
`else
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`ifdef OR1200_ALTERA_LPM
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328
//
329
// Instantiation of FPGA memory:
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//
331
// Altera LPM
332
//
333
// Added By Jamil Khatib
334
//
335
 
336
wire    wr;
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338
assign  wr = ce & we;
339
 
340
initial $display("Using Altera LPM.");
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342
lpm_ram_dq lpm_ram_dq_component (
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        .address(addr),
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        .inclock(clk),
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        .outclock(clk),
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        .data(di),
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        .we(wr),
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        .q(doq)
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);
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defparam lpm_ram_dq_component.lpm_width = dw,
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        lpm_ram_dq_component.lpm_widthad = aw,
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        lpm_ram_dq_component.lpm_indata = "REGISTERED",
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        lpm_ram_dq_component.lpm_address_control = "REGISTERED",
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        lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
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        lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
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        // examplar attribute lpm_ram_dq_component NOOPT TRUE
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359
`else
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361
//
362
// Generic single-port synchronous RAM model
363
//
364
 
365
//
366
// Generic RAM's registers and wires
367
//
368
reg     [dw-1:0] mem [(1<<aw)-1:0];       // RAM content
369
reg     [aw-1:0] addr_reg;               // RAM address register
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371
//
372
// Data output drivers
373
//
374
assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};
375
 
376
//
377
// RAM address register
378
//
379
always @(posedge clk or posedge rst)
380
        if (rst)
381
                addr_reg <= #1 {aw{1'b0}};
382
        else if (ce)
383
                addr_reg <= #1 addr;
384
 
385
//
386
// RAM write
387
//
388
always @(posedge clk)
389
        if (ce && we)
390
                mem[addr] <= #1 di;
391
 
392
`endif  // !OR1200_ALTERA_LPM
393
`endif  // !OR1200_XILINX_RAMB16
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`endif  // !OR1200_XILINX_RAMB4
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`endif  // !OR1200_VIRTUALSILICON_SSP
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`endif  // !OR1200_VIRAGE_SSP
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`endif  // !OR1200_AVANT_ATP
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`endif  // !OR1200_ARTISAN_SSP
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endmodule

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