//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// Generic Single-Port Synchronous RAM ////
|
//// Generic Single-Port Synchronous RAM ////
|
//// ////
|
//// ////
|
//// This file is part of memory library available from ////
|
//// This file is part of memory library available from ////
|
//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////
|
//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////
|
//// ////
|
//// ////
|
//// Description ////
|
//// Description ////
|
//// This block is a wrapper with common single-port ////
|
//// This block is a wrapper with common single-port ////
|
//// synchronous memory interface for different ////
|
//// synchronous memory interface for different ////
|
//// types of ASIC and FPGA RAMs. Beside universal memory ////
|
//// types of ASIC and FPGA RAMs. Beside universal memory ////
|
//// interface it also provides behavioral model of generic ////
|
//// interface it also provides behavioral model of generic ////
|
//// single-port synchronous RAM. ////
|
//// single-port synchronous RAM. ////
|
//// It should be used in all OPENCORES designs that want to be ////
|
//// It should be used in all OPENCORES designs that want to be ////
|
//// portable accross different target technologies and ////
|
//// portable accross different target technologies and ////
|
//// independent of target memory. ////
|
//// independent of target memory. ////
|
//// ////
|
//// ////
|
//// Supported ASIC RAMs are: ////
|
//// Supported ASIC RAMs are: ////
|
//// - Artisan Single-Port Sync RAM ////
|
//// - Artisan Single-Port Sync RAM ////
|
//// - Avant! Two-Port Sync RAM (*) ////
|
//// - Avant! Two-Port Sync RAM (*) ////
|
//// - Virage Single-Port Sync RAM ////
|
//// - Virage Single-Port Sync RAM ////
|
//// - Virtual Silicon Single-Port Sync RAM ////
|
//// - Virtual Silicon Single-Port Sync RAM ////
|
//// ////
|
//// ////
|
//// Supported FPGA RAMs are: ////
|
//// Supported FPGA RAMs are: ////
|
//// - Xilinx Virtex RAMB16 ////
|
//// - Xilinx Virtex RAMB16 ////
|
//// - Xilinx Virtex RAMB4 ////
|
//// - Xilinx Virtex RAMB4 ////
|
//// - Altera LPM ////
|
//// - Altera LPM ////
|
//// ////
|
//// ////
|
//// To Do: ////
|
//// To Do: ////
|
//// - xilinx rams need external tri-state logic ////
|
//// - xilinx rams need external tri-state logic ////
|
//// - fix avant! two-port ram ////
|
//// - fix avant! two-port ram ////
|
//// - add additional RAMs ////
|
//// - add additional RAMs ////
|
//// ////
|
//// ////
|
//// Author(s): ////
|
//// Author(s): ////
|
//// - Damjan Lampret, lampret@opencores.org ////
|
//// - Damjan Lampret, lampret@opencores.org ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// Copyright (C) 2000 Authors and OPENCORES.ORG ////
|
//// Copyright (C) 2000 Authors and OPENCORES.ORG ////
|
//// ////
|
//// ////
|
//// This source file may be used and distributed without ////
|
//// This source file may be used and distributed without ////
|
//// restriction provided that this copyright statement is not ////
|
//// restriction provided that this copyright statement is not ////
|
//// removed from the file and that any derivative work contains ////
|
//// removed from the file and that any derivative work contains ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// the original copyright notice and the associated disclaimer. ////
|
//// ////
|
//// ////
|
//// This source file is free software; you can redistribute it ////
|
//// This source file is free software; you can redistribute it ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// and/or modify it under the terms of the GNU Lesser General ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// Public License as published by the Free Software Foundation; ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// either version 2.1 of the License, or (at your option) any ////
|
//// later version. ////
|
//// later version. ////
|
//// ////
|
//// ////
|
//// This source is distributed in the hope that it will be ////
|
//// This source is distributed in the hope that it will be ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// useful, but WITHOUT ANY WARRANTY; without even the implied ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// PURPOSE. See the GNU Lesser General Public License for more ////
|
//// details. ////
|
//// details. ////
|
//// ////
|
//// ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// You should have received a copy of the GNU Lesser General ////
|
//// Public License along with this source; if not, download it ////
|
//// Public License along with this source; if not, download it ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// from http://www.opencores.org/lgpl.shtml ////
|
//// ////
|
//// ////
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//
|
//
|
// CVS Revision History
|
// CVS Revision History
|
//
|
//
|
// $Log: or1200_spram_512x20.v,v $
|
// $Log: or1200_spram_512x20.v,v $
|
// Revision 2.0 2010/06/30 11:00:00 ORSoC
|
// Revision 2.0 2010/06/30 11:00:00 ORSoC
|
// Minor update:
|
// Minor update:
|
// Coding style changed.
|
// Coding style changed.
|
//
|
//
|
// Revision 1.9 2005/10/19 11:37:56 jcastillo
|
// Revision 1.9 2005/10/19 11:37:56 jcastillo
|
// Added support for RAMB16 Xilinx4/Spartan3 primitives
|
// Added support for RAMB16 Xilinx4/Spartan3 primitives
|
//
|
//
|
// Revision 1.8 2004/06/08 18:15:32 lampret
|
// Revision 1.8 2004/06/08 18:15:32 lampret
|
// Changed behavior of the simulation generic models
|
// Changed behavior of the simulation generic models
|
//
|
//
|
// Revision 1.7 2004/04/05 08:29:57 lampret
|
// Revision 1.7 2004/04/05 08:29:57 lampret
|
// Merged branch_qmem into main tree.
|
// Merged branch_qmem into main tree.
|
//
|
//
|
// Revision 1.3.4.1 2003/12/09 11:46:48 simons
|
// Revision 1.3.4.1 2003/12/09 11:46:48 simons
|
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
|
// Mbist nameing changed, Artisan ram instance signal names fixed, some synthesis waning fixed.
|
//
|
//
|
// Revision 1.3 2003/04/07 01:19:07 lampret
|
// Revision 1.3 2003/04/07 01:19:07 lampret
|
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
|
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
|
//
|
//
|
// Revision 1.2 2002/10/17 20:04:40 lampret
|
// Revision 1.2 2002/10/17 20:04:40 lampret
|
// Added BIST scan. Special VS RAMs need to be used to implement BIST.
|
// Added BIST scan. Special VS RAMs need to be used to implement BIST.
|
//
|
//
|
// Revision 1.1 2002/01/03 08:16:15 lampret
|
// Revision 1.1 2002/01/03 08:16:15 lampret
|
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
|
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
|
//
|
//
|
// Revision 1.10 2001/11/27 21:24:04 lampret
|
// Revision 1.10 2001/11/27 21:24:04 lampret
|
// Changed instantiation name of VS RAMs.
|
// Changed instantiation name of VS RAMs.
|
//
|
//
|
// Revision 1.9 2001/11/27 19:45:04 lampret
|
// Revision 1.9 2001/11/27 19:45:04 lampret
|
// Fixed VS RAM instantiation - again.
|
// Fixed VS RAM instantiation - again.
|
//
|
//
|
// Revision 1.8 2001/11/23 21:42:31 simons
|
// Revision 1.8 2001/11/23 21:42:31 simons
|
// Program counter divided to PPC and NPC.
|
// Program counter divided to PPC and NPC.
|
//
|
//
|
// Revision 1.6 2001/10/21 17:57:16 lampret
|
// Revision 1.6 2001/10/21 17:57:16 lampret
|
// 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.
|
// 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.
|
//
|
//
|
// Revision 1.5 2001/10/14 13:12:09 lampret
|
// Revision 1.5 2001/10/14 13:12:09 lampret
|
// MP3 version.
|
// MP3 version.
|
//
|
//
|
// Revision 1.1.1.1 2001/10/06 10:18:36 igorm
|
// Revision 1.1.1.1 2001/10/06 10:18:36 igorm
|
// no message
|
// no message
|
//
|
//
|
// Revision 1.1 2001/08/09 13:39:33 lampret
|
// Revision 1.1 2001/08/09 13:39:33 lampret
|
// Major clean-up.
|
// Major clean-up.
|
//
|
//
|
// Revision 1.2 2001/07/30 05:38:02 lampret
|
// Revision 1.2 2001/07/30 05:38:02 lampret
|
// Adding empty directories required by HDL coding guidelines
|
// Adding empty directories required by HDL coding guidelines
|
//
|
//
|
//
|
//
|
|
|
// synopsys translate_off
|
// synopsys translate_off
|
`include "timescale.v"
|
`include "timescale.v"
|
// synopsys translate_on
|
// synopsys translate_on
|
`include "or1200_defines.v"
|
`include "or1200_defines.v"
|
|
|
module or1200_spram_512x20(
|
module or1200_spram_512x20(
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
// RAM BIST
|
// RAM BIST
|
mbist_si_i, mbist_so_o, mbist_ctrl_i,
|
mbist_si_i, mbist_so_o, mbist_ctrl_i,
|
`endif
|
`endif
|
// Generic synchronous single-port RAM interface
|
// Generic synchronous single-port RAM interface
|
clk, rst, ce, we, oe, addr, di, doq
|
clk, rst, ce, we, oe, addr, di, doq
|
);
|
);
|
|
|
//
|
//
|
// Default address and data buses width
|
// Default address and data buses width
|
//
|
//
|
parameter aw = 9;
|
parameter aw = 9;
|
parameter dw = 20;
|
parameter dw = 20;
|
|
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
//
|
//
|
// RAM BIST
|
// RAM BIST
|
//
|
//
|
input mbist_si_i;
|
input mbist_si_i;
|
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
|
input [`OR1200_MBIST_CTRL_WIDTH - 1:0] mbist_ctrl_i;
|
output mbist_so_o;
|
output mbist_so_o;
|
`endif
|
`endif
|
|
|
//
|
//
|
// Generic synchronous single-port RAM interface
|
// Generic synchronous single-port RAM interface
|
//
|
//
|
input clk; // Clock
|
input clk; // Clock
|
input rst; // Reset
|
input rst; // Reset
|
input ce; // Chip enable input
|
input ce; // Chip enable input
|
input we; // Write enable input
|
input we; // Write enable input
|
input oe; // Output enable input
|
input oe; // Output enable input
|
input [aw-1:0] addr; // address bus inputs
|
input [aw-1:0] addr; // address bus inputs
|
input [dw-1:0] di; // input data bus
|
input [dw-1:0] di; // input data bus
|
output [dw-1:0] doq; // output data bus
|
output [dw-1:0] doq; // output data bus
|
|
|
//
|
//
|
// Internal wires and registers
|
// Internal wires and registers
|
//
|
//
|
`ifdef OR1200_XILINX_RAMB4
|
`ifdef OR1200_XILINX_RAMB4
|
wire [3:0] unconnected;
|
wire [3:0] unconnected;
|
`else
|
`else
|
`ifdef OR1200_XILINX_RAMB16
|
`ifdef OR1200_XILINX_RAMB16
|
wire [11:0] unconnected;
|
wire [11:0] unconnected;
|
`endif // !OR1200_XILINX_RAMB16
|
`endif // !OR1200_XILINX_RAMB16
|
`endif // !OR1200_XILINX_RAMB4
|
`endif // !OR1200_XILINX_RAMB4
|
|
|
`ifdef OR1200_ARTISAN_SSP
|
`ifdef OR1200_ARTISAN_SSP
|
`else
|
`else
|
`ifdef OR1200_VIRTUALSILICON_SSP
|
`ifdef OR1200_VIRTUALSILICON_SSP
|
`else
|
`else
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
assign mbist_so_o = mbist_si_i;
|
assign mbist_so_o = mbist_si_i;
|
`endif
|
`endif
|
`endif
|
`endif
|
`endif
|
`endif
|
|
|
`ifdef OR1200_ARTISAN_SSP
|
`ifdef OR1200_ARTISAN_SSP
|
|
|
//
|
//
|
// Instantiation of ASIC memory:
|
// Instantiation of ASIC memory:
|
//
|
//
|
// Artisan Synchronous Single-Port RAM (ra1sh)
|
// Artisan Synchronous Single-Port RAM (ra1sh)
|
//
|
//
|
`ifdef UNUSED
|
`ifdef UNUSED
|
art_hssp_512x20 #(dw, 1<<aw, aw) artisan_ssp(
|
art_hssp_512x20 #(dw, 1<<aw, aw) artisan_ssp(
|
`else
|
`else
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
art_hssp_512x20_bist artisan_ssp(
|
art_hssp_512x20_bist artisan_ssp(
|
`else
|
`else
|
art_hssp_512x20 artisan_ssp(
|
art_hssp_512x20 artisan_ssp(
|
`endif
|
`endif
|
`endif
|
`endif
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
// RAM BIST
|
// RAM BIST
|
.mbist_si_i(mbist_si_i),
|
.mbist_si_i(mbist_si_i),
|
.mbist_so_o(mbist_so_o),
|
.mbist_so_o(mbist_so_o),
|
.mbist_ctrl_i(mbist_ctrl_i),
|
.mbist_ctrl_i(mbist_ctrl_i),
|
`endif
|
`endif
|
.CLK(clk),
|
.CLK(clk),
|
.CEN(~ce),
|
.CEN(~ce),
|
.WEN(~we),
|
.WEN(~we),
|
.A(addr),
|
.A(addr),
|
.D(di),
|
.D(di),
|
.OEN(~oe),
|
.OEN(~oe),
|
.Q(doq)
|
.Q(doq)
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_AVANT_ATP
|
`ifdef OR1200_AVANT_ATP
|
|
|
//
|
//
|
// Instantiation of ASIC memory:
|
// Instantiation of ASIC memory:
|
//
|
//
|
// Avant! Asynchronous Two-Port RAM
|
// Avant! Asynchronous Two-Port RAM
|
//
|
//
|
avant_atp avant_atp(
|
avant_atp avant_atp(
|
.web(~we),
|
.web(~we),
|
.reb(),
|
.reb(),
|
.oeb(~oe),
|
.oeb(~oe),
|
.rcsb(),
|
.rcsb(),
|
.wcsb(),
|
.wcsb(),
|
.ra(addr),
|
.ra(addr),
|
.wa(addr),
|
.wa(addr),
|
.di(di),
|
.di(di),
|
.doq(doq)
|
.doq(doq)
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_VIRAGE_SSP
|
`ifdef OR1200_VIRAGE_SSP
|
|
|
//
|
//
|
// Instantiation of ASIC memory:
|
// Instantiation of ASIC memory:
|
//
|
//
|
// Virage Synchronous 1-port R/W RAM
|
// Virage Synchronous 1-port R/W RAM
|
//
|
//
|
virage_ssp virage_ssp(
|
virage_ssp virage_ssp(
|
.clk(clk),
|
.clk(clk),
|
.adr(addr),
|
.adr(addr),
|
.d(di),
|
.d(di),
|
.we(we),
|
.we(we),
|
.oe(oe),
|
.oe(oe),
|
.me(ce),
|
.me(ce),
|
.q(doq)
|
.q(doq)
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_VIRTUALSILICON_SSP
|
`ifdef OR1200_VIRTUALSILICON_SSP
|
|
|
//
|
//
|
// Instantiation of ASIC memory:
|
// Instantiation of ASIC memory:
|
//
|
//
|
// Virtual Silicon Single-Port Synchronous SRAM
|
// Virtual Silicon Single-Port Synchronous SRAM
|
//
|
//
|
`ifdef UNUSED
|
`ifdef UNUSED
|
vs_hdsp_512x20 #(1<<aw, aw-1, dw-1) vs_ssp(
|
vs_hdsp_512x20 #(1<<aw, aw-1, dw-1) vs_ssp(
|
`else
|
`else
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
vs_hdsp_512x20_bist vs_ssp(
|
vs_hdsp_512x20_bist vs_ssp(
|
`else
|
`else
|
vs_hdsp_512x20 vs_ssp(
|
vs_hdsp_512x20 vs_ssp(
|
`endif
|
`endif
|
`endif
|
`endif
|
`ifdef OR1200_BIST
|
`ifdef OR1200_BIST
|
// RAM BIST
|
// RAM BIST
|
.mbist_si_i(mbist_si_i),
|
.mbist_si_i(mbist_si_i),
|
.mbist_so_o(mbist_so_o),
|
.mbist_so_o(mbist_so_o),
|
.mbist_ctrl_i(mbist_ctrl_i),
|
.mbist_ctrl_i(mbist_ctrl_i),
|
`endif
|
`endif
|
.CK(clk),
|
.CK(clk),
|
.ADR(addr),
|
.ADR(addr),
|
.DI(di),
|
.DI(di),
|
.WEN(~we),
|
.WEN(~we),
|
.CEN(~ce),
|
.CEN(~ce),
|
.OEN(~oe),
|
.OEN(~oe),
|
.DOUT(doq)
|
.DOUT(doq)
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_XILINX_RAMB4
|
`ifdef OR1200_XILINX_RAMB4
|
|
|
//
|
//
|
// Instantiation of FPGA memory:
|
// Instantiation of FPGA memory:
|
//
|
//
|
// Virtex/Spartan2
|
// Virtex/Spartan2
|
//
|
//
|
|
|
//
|
//
|
// Block 0
|
// Block 0
|
//
|
//
|
RAMB4_S8 ramb4_s8_0(
|
RAMB4_S8 ramb4_s8_0(
|
.CLK(clk),
|
.CLK(clk),
|
.RST(1'b0),
|
.RST(1'b0),
|
.ADDR(addr),
|
.ADDR(addr),
|
.DI(di[7:0]),
|
.DI(di[7:0]),
|
.EN(ce),
|
.EN(ce),
|
.WE(we),
|
.WE(we),
|
.DO(doq[7:0])
|
.DO(doq[7:0])
|
);
|
);
|
|
|
//
|
//
|
// Block 1
|
// Block 1
|
//
|
//
|
RAMB4_S8 ramb4_s8_1(
|
RAMB4_S8 ramb4_s8_1(
|
.CLK(clk),
|
.CLK(clk),
|
.RST(1'b0),
|
.RST(1'b0),
|
.ADDR(addr),
|
.ADDR(addr),
|
.DI(di[15:8]),
|
.DI(di[15:8]),
|
.EN(ce),
|
.EN(ce),
|
.WE(we),
|
.WE(we),
|
.DO(doq[15:8])
|
.DO(doq[15:8])
|
);
|
);
|
|
|
//
|
//
|
// Block 2
|
// Block 2
|
//
|
//
|
RAMB4_S8 ramb4_s8_2(
|
RAMB4_S8 ramb4_s8_2(
|
.CLK(clk),
|
.CLK(clk),
|
.RST(1'b0),
|
.RST(1'b0),
|
.ADDR(addr),
|
.ADDR(addr),
|
.DI({4'b0000, di[19:16]}),
|
.DI({4'b0000, di[19:16]}),
|
.EN(ce),
|
.EN(ce),
|
.WE(we),
|
.WE(we),
|
.DO({unconnected, doq[19:16]})
|
.DO({unconnected, doq[19:16]})
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_XILINX_RAMB16
|
`ifdef OR1200_XILINX_RAMB16
|
|
|
//
|
//
|
// Instantiation of FPGA memory:
|
// Instantiation of FPGA memory:
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//
|
//
|
// Virtex4/Spartan3E
|
// Virtex4/Spartan3E
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//
|
//
|
// Added By Nir Mor
|
// Added By Nir Mor
|
//
|
//
|
|
|
RAMB16_S36 ramb16_s36(
|
RAMB16_S36 ramb16_s36(
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.CLK(clk),
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.CLK(clk),
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.SSR(1'b0),
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.SSR(1'b0),
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.ADDR(addr),
|
.ADDR(addr),
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.DI({12'h000,di}),
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.DI({12'h000,di}),
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.DIP(4'h0),
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.DIP(4'h0),
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.EN(ce),
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.EN(ce),
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.WE(we),
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.WE(we),
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.DO({unconnected,doq}),
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.DO({unconnected,doq}),
|
.DOP()
|
.DOP()
|
);
|
);
|
|
|
`else
|
`else
|
|
|
`ifdef OR1200_ALTERA_LPM
|
`ifdef OR1200_ALTERA_LPM
|
|
|
//
|
//
|
// Instantiation of FPGA memory:
|
// Instantiation of FPGA memory:
|
//
|
//
|
// Altera LPM
|
// Altera LPM
|
//
|
//
|
// Added By Jamil Khatib
|
// Added By Jamil Khatib
|
//
|
//
|
|
|
wire wr;
|
wire wr;
|
|
|
assign wr = ce & we;
|
assign wr = ce & we;
|
|
|
initial $display("Using Altera LPM.");
|
initial $display("Using Altera LPM.");
|
|
|
lpm_ram_dq lpm_ram_dq_component (
|
lpm_ram_dq lpm_ram_dq_component (
|
.address(addr),
|
.address(addr),
|
.inclock(clk),
|
.inclock(clk),
|
.outclock(clk),
|
.outclock(clk),
|
.data(di),
|
.data(di),
|
.we(wr),
|
.we(wr),
|
.q(doq)
|
.q(doq)
|
);
|
);
|
|
|
defparam lpm_ram_dq_component.lpm_width = dw,
|
defparam lpm_ram_dq_component.lpm_width = dw,
|
lpm_ram_dq_component.lpm_widthad = aw,
|
lpm_ram_dq_component.lpm_widthad = aw,
|
lpm_ram_dq_component.lpm_indata = "REGISTERED",
|
lpm_ram_dq_component.lpm_indata = "REGISTERED",
|
lpm_ram_dq_component.lpm_address_control = "REGISTERED",
|
lpm_ram_dq_component.lpm_address_control = "REGISTERED",
|
lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
|
lpm_ram_dq_component.lpm_outdata = "UNREGISTERED",
|
lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
|
lpm_ram_dq_component.lpm_hint = "USE_EAB=ON";
|
// examplar attribute lpm_ram_dq_component NOOPT TRUE
|
// examplar attribute lpm_ram_dq_component NOOPT TRUE
|
|
|
`else
|
`else
|
|
|
//
|
//
|
// Generic single-port synchronous RAM model
|
// Generic single-port synchronous RAM model
|
//
|
//
|
|
|
//
|
//
|
// Generic RAM's registers and wires
|
// Generic RAM's registers and wires
|
//
|
//
|
reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content
|
reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content
|
reg [aw-1:0] addr_reg; // RAM address register
|
reg [aw-1:0] addr_reg; // RAM address register
|
|
|
//
|
//
|
// Data output drivers
|
// Data output drivers
|
//
|
//
|
assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};
|
assign doq = (oe) ? mem[addr_reg] : {dw{1'b0}};
|
|
|
//
|
//
|
// RAM address register
|
// RAM address register
|
//
|
//
|
always @(posedge clk or posedge rst)
|
always @(posedge clk or `OR1200_RST_EVENT rst)
|
if (rst)
|
if (rst == `OR1200_RST_VALUE)
|
addr_reg <= {aw{1'b0}};
|
addr_reg <= {aw{1'b0}};
|
else if (ce)
|
else if (ce)
|
addr_reg <= addr;
|
addr_reg <= addr;
|
|
|
//
|
//
|
// RAM write
|
// RAM write
|
//
|
//
|
always @(posedge clk)
|
always @(posedge clk)
|
if (ce && we)
|
if (ce && we)
|
mem[addr] <= di;
|
mem[addr] <= di;
|
|
|
`endif // !OR1200_ALTERA_LPM
|
`endif // !OR1200_ALTERA_LPM
|
`endif // !OR1200_XILINX_RAMB16
|
`endif // !OR1200_XILINX_RAMB16
|
`endif // !OR1200_XILINX_RAMB4
|
`endif // !OR1200_XILINX_RAMB4
|
`endif // !OR1200_VIRTUALSILICON_SSP
|
`endif // !OR1200_VIRTUALSILICON_SSP
|
`endif // !OR1200_VIRAGE_SSP
|
`endif // !OR1200_VIRAGE_SSP
|
`endif // !OR1200_AVANT_ATP
|
`endif // !OR1200_AVANT_ATP
|
`endif // !OR1200_ARTISAN_SSP
|
`endif // !OR1200_ARTISAN_SSP
|
|
|
endmodule
|
endmodule
|
|
|
