| Line 1... |
Line 1... |
|
//////////////////////////////////////////////////////////////////////
|
|
//// ////
|
|
//// Generic Two-Port Synchronous RAM ////
|
|
//// ////
|
|
//// This file is part of memory library available from ////
|
|
//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////
|
|
//// ////
|
|
//// Description ////
|
|
//// This block is a wrapper with common two-port ////
|
|
//// synchronous memory interface for different ////
|
|
//// types of ASIC and FPGA RAMs. Beside universal memory ////
|
|
//// interface it also provides behavioral model of generic ////
|
|
//// two-port synchronous RAM. ////
|
|
//// It should be used in all OPENCORES designs that want to be ////
|
|
//// portable accross different target technologies and ////
|
|
//// independent of target memory. ////
|
|
//// ////
|
|
//// Supported ASIC RAMs are: ////
|
|
//// - Artisan Double-Port Sync RAM ////
|
|
//// - Avant! Two-Port Sync RAM (*) ////
|
|
//// - Virage 2-port Sync RAM ////
|
|
//// ////
|
|
//// Supported FPGA RAMs are: ////
|
|
//// - Xilinx Virtex RAMB16 ////
|
|
//// - Xilinx Virtex RAMB4 ////
|
|
//// - Altera LPM ////
|
|
//// ////
|
|
//// To Do: ////
|
|
//// - fix Avant! ////
|
|
//// - xilinx rams need external tri-state logic ////
|
|
//// - add additional RAMs (VS etc) ////
|
|
//// ////
|
|
//// 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: or1200_tpram_32x32.v,v $
|
|
// Revision 2.0 2010/06/30 11:00:00 ORSoC
|
|
// Minor update:
|
|
// Coding style changed.
|
|
//
|
|
// Revision 1.5 2005/10/19 11:37:56 jcastillo
|
|
// Added support for RAMB16 Xilinx4/Spartan3 primitives
|
|
//
|
|
// Revision 1.4 2004/06/08 18:15:48 lampret
|
|
// Changed behavior of the simulation generic models
|
|
//
|
|
// Revision 1.3 2004/04/05 08:29:57 lampret
|
|
// Merged branch_qmem into main tree.
|
|
//
|
|
// Revision 1.2.4.1 2003/07/08 15:36:37 lampret
|
|
// Added embedded memory QMEM.
|
|
//
|
|
// Revision 1.2 2003/04/07 01:19:07 lampret
|
|
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
|
|
//
|
|
// Revision 1.1 2002/01/03 08:16:15 lampret
|
|
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
|
|
//
|
|
// Revision 1.7 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.
|
|
//
|
|
// Revision 1.6 2001/10/14 13:12:09 lampret
|
|
// MP3 version.
|
|
//
|
|
// Revision 1.1.1.1 2001/10/06 10:18:36 igorm
|
|
// no message
|
|
//
|
|
// Revision 1.1 2001/08/09 13:39:33 lampret
|
|
// Major clean-up.
|
|
//
|
|
// Revision 1.2 2001/07/30 05:38:02 lampret
|
|
// Adding empty directories required by HDL coding guidelines
|
|
//
|
|
//
|
|
|
|
// synopsys translate_off
|
|
`include "timescale.v"
|
|
// synopsys translate_on
|
|
`include "or1200_defines.v"
|
|
|
|
module or1200_tpram_32x32(
|
|
// Generic synchronous two-port RAM interface
|
|
clk_a, rst_a, ce_a, we_a, oe_a, addr_a, di_a, do_a,
|
|
clk_b, rst_b, ce_b, we_b, oe_b, addr_b, di_b, do_b
|
|
);
|
|
|
|
//
|
|
// Default address and data buses width
|
|
//
|
|
parameter aw = 5;
|
|
parameter dw = 32;
|
|
|
|
//
|
|
// Generic synchronous two-port RAM interface
|
|
//
|
|
input clk_a; // Clock
|
|
input rst_a; // Reset
|
|
input ce_a; // Chip enable input
|
|
input we_a; // Write enable input
|
|
input oe_a; // Output enable input
|
|
input [aw-1:0] addr_a; // address bus inputs
|
|
input [dw-1:0] di_a; // input data bus
|
|
output [dw-1:0] do_a; // output data bus
|
|
input clk_b; // Clock
|
|
input rst_b; // Reset
|
|
input ce_b; // Chip enable input
|
|
input we_b; // Write enable input
|
|
input oe_b; // Output enable input
|
|
input [aw-1:0] addr_b; // address bus inputs
|
|
input [dw-1:0] di_b; // input data bus
|
|
output [dw-1:0] do_b; // output data bus
|
|
|
|
//
|
|
// Internal wires and registers
|
|
//
|
|
|
|
|
|
`ifdef OR1200_ARTISAN_SDP
|
|
|
|
//
|
|
// Instantiation of ASIC memory:
|
|
//
|
|
// Artisan Synchronous Double-Port RAM (ra2sh)
|
|
//
|
|
`ifdef UNUSED
|
|
art_hsdp_32x32 #(dw, 1<<aw, aw) artisan_sdp(
|
|
`else
|
|
art_hsdp_32x32 artisan_sdp(
|
|
`endif
|
|
.qa(do_a),
|
|
.clka(clk_a),
|
|
.cena(~ce_a),
|
|
.wena(~we_a),
|
|
.aa(addr_a),
|
|
.da(di_a),
|
|
.oena(~oe_a),
|
|
.qb(do_b),
|
|
.clkb(clk_b),
|
|
.cenb(~ce_b),
|
|
.wenb(~we_b),
|
|
.ab(addr_b),
|
|
.db(di_b),
|
|
.oenb(~oe_b)
|
|
);
|
|
|
|
`else
|
|
|
|
`ifdef OR1200_AVANT_ATP
|
|
|
|
//
|
|
// Instantiation of ASIC memory:
|
|
//
|
|
// Avant! Asynchronous Two-Port RAM
|
|
//
|
|
avant_atp avant_atp(
|
|
.web(~we),
|
|
.reb(),
|
|
.oeb(~oe),
|
|
.rcsb(),
|
|
.wcsb(),
|
|
.ra(addr),
|
|
.wa(addr),
|
|
.di(di),
|
|
.doq(doq)
|
|
);
|
|
|
|
`else
|
|
|
|
`ifdef OR1200_VIRAGE_STP
|
|
|
|
//
|
|
// Instantiation of ASIC memory:
|
|
//
|
|
// Virage Synchronous 2-port R/W RAM
|
|
//
|
|
virage_stp virage_stp(
|
|
.QA(do_a),
|
|
.QB(do_b),
|
|
|
|
.ADRA(addr_a),
|
|
.DA(di_a),
|
|
.WEA(we_a),
|
|
.OEA(oe_a),
|
|
.MEA(ce_a),
|
|
.CLKA(clk_a),
|
|
|
|
.ADRB(adr_b),
|
|
.DB(di_b),
|
|
.WEB(we_b),
|
|
.OEB(oe_b),
|
|
.MEB(ce_b),
|
|
.CLKB(clk_b)
|
|
);
|
|
|
|
`else
|
|
|
|
`ifdef OR1200_XILINX_RAMB4
|
|
|
|
//
|
|
// Instantiation of FPGA memory:
|
|
//
|
|
// Virtex/Spartan2
|
|
//
|
|
|
|
//
|
|
// Block 0
|
|
//
|
|
RAMB4_S16_S16 ramb4_s16_s16_0(
|
|
.CLKA(clk_a),
|
|
.RSTA(1'b0),
|
|
.ADDRA(addr_a),
|
|
.DIA(di_a[15:0]),
|
|
.ENA(ce_a),
|
|
.WEA(we_a),
|
|
.DOA(do_a[15:0]),
|
|
|
|
.CLKB(clk_b),
|
|
.RSTB(1'b0),
|
|
.ADDRB(addr_b),
|
|
.DIB(di_b[15:0]),
|
|
.ENB(ce_b),
|
|
.WEB(we_b),
|
|
.DOB(do_b[15:0])
|
|
);
|
|
|
|
//
|
|
// Block 1
|
|
//
|
|
RAMB4_S16_S16 ramb4_s16_s16_1(
|
|
.CLKA(clk_a),
|
|
.RSTA(1'b0),
|
|
.ADDRA(addr_a),
|
|
.DIA(di_a[31:16]),
|
|
.ENA(ce_a),
|
|
.WEA(we_a),
|
|
.DOA(do_a[31:16]),
|
|
|
|
.CLKB(clk_b),
|
|
.RSTB(1'b0),
|
|
.ADDRB(addr_b),
|
|
.DIB(di_b[31:16]),
|
|
.ENB(ce_b),
|
|
.WEB(we_b),
|
|
.DOB(do_b[31:16])
|
|
);
|
|
|
|
`else
|
|
|
|
`ifdef OR1200_XILINX_RAMB16
|
|
|
|
//
|
|
// Instantiation of FPGA memory:
|
|
//
|
|
// Virtex4/Spartan3E
|
|
//
|
|
// Added By Nir Mor
|
|
//
|
|
|
|
RAMB16_S36_S36 ramb16_s36_s36(
|
|
.CLKA(clk_a),
|
|
.SSRA(1'b0),
|
|
.ADDRA({4'b0000,addr_a}),
|
|
.DIA(di_a),
|
|
.DIPA(4'h0),
|
|
.ENA(ce_a),
|
|
.WEA(we_a),
|
|
.DOA(do_a),
|
|
.DOPA(),
|
|
|
|
.CLKB(clk_b),
|
|
.SSRB(1'b0),
|
|
.ADDRB({4'b0000,addr_b}),
|
|
.DIB(di_b),
|
|
.DIPB(4'h0),
|
|
.ENB(ce_b),
|
|
.WEB(we_b),
|
|
.DOB(do_b),
|
|
.DOPB()
|
|
);
|
|
|
|
`else
|
|
|
|
`ifdef OR1200_ALTERA_LPM_XXX
|
|
|
|
//
|
|
// Instantiation of FPGA memory:
|
|
//
|
|
// Altera LPM
|
|
//
|
|
// Added By Jamil Khatib
|
|
//
|
|
altqpram altqpram_component (
|
|
.wraddress_a (addr_a),
|
|
.inclocken_a (ce_a),
|
|
.wraddress_b (addr_b),
|
|
.wren_a (we_a),
|
|
.inclocken_b (ce_b),
|
|
.wren_b (we_b),
|
|
.inaclr_a (1'b0),
|
|
.inaclr_b (1'b0),
|
|
.inclock_a (clk_a),
|
|
.inclock_b (clk_b),
|
|
.data_a (di_a),
|
|
.data_b (di_b),
|
|
.q_a (do_a),
|
|
.q_b (do_b)
|
|
);
|
|
|
|
defparam altqpram_component.operation_mode = "BIDIR_DUAL_PORT",
|
|
altqpram_component.width_write_a = dw,
|
|
altqpram_component.widthad_write_a = aw,
|
|
altqpram_component.numwords_write_a = dw,
|
|
altqpram_component.width_read_a = dw,
|
|
altqpram_component.widthad_read_a = aw,
|
|
altqpram_component.numwords_read_a = dw,
|
|
altqpram_component.width_write_b = dw,
|
|
altqpram_component.widthad_write_b = aw,
|
|
altqpram_component.numwords_write_b = dw,
|
|
altqpram_component.width_read_b = dw,
|
|
altqpram_component.widthad_read_b = aw,
|
|
altqpram_component.numwords_read_b = dw,
|
|
altqpram_component.indata_reg_a = "INCLOCK_A",
|
|
altqpram_component.wrcontrol_wraddress_reg_a = "INCLOCK_A",
|
|
altqpram_component.outdata_reg_a = "INCLOCK_A",
|
|
altqpram_component.indata_reg_b = "INCLOCK_B",
|
|
altqpram_component.wrcontrol_wraddress_reg_b = "INCLOCK_B",
|
|
altqpram_component.outdata_reg_b = "INCLOCK_B",
|
|
altqpram_component.indata_aclr_a = "INACLR_A",
|
|
altqpram_component.wraddress_aclr_a = "INACLR_A",
|
|
altqpram_component.wrcontrol_aclr_a = "INACLR_A",
|
|
altqpram_component.outdata_aclr_a = "INACLR_A",
|
|
altqpram_component.indata_aclr_b = "NONE",
|
|
altqpram_component.wraddress_aclr_b = "NONE",
|
|
altqpram_component.wrcontrol_aclr_b = "NONE",
|
|
altqpram_component.outdata_aclr_b = "INACLR_B",
|
|
altqpram_component.lpm_hint = "USE_ESB=ON";
|
|
//examplar attribute altqpram_component NOOPT TRUE
|
|
|
|
`else
|
|
|
|
//
|
|
// Generic two-port synchronous RAM model
|
|
//
|
|
|
|
//
|
|
// Generic RAM's registers and wires
|
|
//
|
|
reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content
|
|
reg [aw-1:0] addr_a_reg; // RAM read address register
|
|
reg [aw-1:0] addr_b_reg; // RAM read address register
|
|
|
|
//
|
|
// Data output drivers
|
|
//
|
|
assign do_a = (oe_a) ? mem[addr_a_reg] : {dw{1'b0}};
|
|
assign do_b = (oe_b) ? mem[addr_b_reg] : {dw{1'b0}};
|
|
|
|
//
|
|
// RAM write
|
|
//
|
|
always @(posedge clk_a)
|
|
if (ce_a && we_a)
|
|
mem[addr_a] <= di_a;
|
|
|
|
//
|
|
// RAM write
|
|
//
|
|
always @(posedge clk_b)
|
|
if (ce_b && we_b)
|
|
mem[addr_b] <= di_b;
|
|
|
|
//
|
|
// RAM read address register
|
|
//
|
|
always @(posedge clk_a or `OR1200_RST_EVENT rst_a)
|
|
if (rst_a == `OR1200_RST_VALUE)
|
|
addr_a_reg <= {aw{1'b0}};
|
|
else if (ce_a)
|
|
addr_a_reg <= addr_a;
|
|
|
|
//
|
|
// RAM read address register
|
|
//
|
|
always @(posedge clk_b or `OR1200_RST_EVENT rst_b)
|
|
if (rst_b == `OR1200_RST_VALUE)
|
|
addr_b_reg <= {aw{1'b0}};
|
|
else if (ce_b)
|
|
addr_b_reg <= addr_b;
|
|
|
|
`endif // !OR1200_ALTERA_LPM
|
|
`endif // !OR1200_XILINX_RAMB16
|
|
`endif // !OR1200_XILINX_RAMB4
|
|
`endif // !OR1200_VIRAGE_STP
|
|
`endif // !OR1200_AVANT_ATP
|
|
`endif // !OR1200_ARTISAN_SDP
|
|
|
|
endmodule
|
|
|
No newline at end of file
|
No newline at end of file
|
