URL https://opencores.org/ocsvn/openrisc/openrisc/trunk

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_dpram_32x32.v] - Blame information for rev 478

Go to most recent revision | Details | Compare with Previous | View Log


//////////////////////////////////////////////////////////////////////
////                                                              ////
////  Generic Double-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 double-port             ////
////  synchronous memory interface for different                  ////
////  types of ASIC and FPGA RAMs. Beside universal memory        ////
////  interface it also provides behavioral model of generic      ////
////  double-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                                      ////
////                                                              ////
////  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_dpram_32x32.v,v $
// Revision 2.0  2010/06/30 11:00:00  ORSoC
// Minor update: 
// Coding style changed.
//
// Revision 1.10  2005/10/19 11:37:56  jcastillo
// Added support for RAMB16 Xilinx4/Spartan3 primitives
//
// Revision 1.9  2004/06/08 18:15:48  lampret
// Changed behavior of the simulation generic models
//
// Revision 1.8  2004/04/05 08:29:57  lampret
// Merged branch_qmem into main tree.
//
// Revision 1.7.4.1  2003/07/08 15:36:37  lampret
// Added embedded memory QMEM.
//
// Revision 1.7  2003/04/07 01:19:07  lampret
// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.
//
// Revision 1.6  2002/03/28 19:25:42  lampret
// Added second type of Virtual Silicon two-port SRAM (for register file). Changed defines for VS STP RAMs.
//
// Revision 1.5  2002/02/01 19:56:54  lampret
// Fixed combinational loops.
//
// Revision 1.4  2002/01/23 07:52:36  lampret
// Changed default reset values for SR and ESR to match or1ksim's. Fixed flop model in or1200_dpram_32x32 when OR1200_XILINX_RAM32X1D is defined.
//
// Revision 1.3  2002/01/19 14:10:22  lampret
// Fixed OR1200_XILINX_RAM32X1D.
//
// Revision 1.2  2002/01/15 06:12:22  lampret
// Fixed module name when compiling with OR1200_XILINX_RAM32X1D
//
// Revision 1.1  2002/01/03 08:16:15  lampret
// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.
//
// Revision 1.10  2001/11/05 14:48:00  lampret
// Added missing endif
//
// Revision 1.9  2001/11/02 18:57:14  lampret
// Modified virtual silicon instantiations.
//
// Revision 1.8  2001/10/22 19:39:56  lampret
// Fixed parameters in generic sprams.
//
// 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_dpram_32x32(
        // Generic synchronous double-port RAM interface
        clk_a, rst_a, ce_a, oe_a, addr_a, do_a,
        clk_b, rst_b, ce_b, we_b, addr_b, di_b
);
 
//
// Default address and data buses width
//
parameter aw = 5;
parameter dw = 32;
 
//
// Generic synchronous double-port RAM interface
//
input                   clk_a;  // Clock
input                   rst_a;  // Reset
input                   ce_a;   // Chip enable input
input                   oe_a;   // Output enable input
input   [aw-1:0] addr_a; // address bus inputs
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   [aw-1:0] addr_b; // address bus inputs
input   [dw-1:0] di_b;   // input 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(1'b1),
        .aa(addr_a),
        .da(32'h00000000),
        .oena(~oe_a),
        .qb(),
        .clkb(clk_b),
        .cenb(~ce_b),
        .wenb(~we_b),
        .ab(addr_b),
        .db(di_b),
        .oenb(1'b1)
);
 
`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(),
 
        .ADRA(addr_a),
        .DA(32'h00000000),
        .WEA(1'b0),
        .OEA(oe_a),
        .MEA(ce_a),
        .CLKA(clk_a),
 
        .ADRB(addr_b),
        .DB(di_b),
        .WEB(we_b),
        .OEB(1'b1),
        .MEB(ce_b),
        .CLKB(clk_b)
);
 
`else
 
`ifdef OR1200_VIRTUALSILICON_STP_T1
 
//
// Instantiation of ASIC memory:
//
// Virtual Silicon Two-port R/W SRAM Type 1
//
`ifdef UNUSED
vs_hdtp_64x32 #(1<<aw, aw-1, dw-1) vs_ssp(
`else
vs_hdtp_64x32 vs_ssp(
`endif
        .P1CK(clk_a),
        .P1CEN(~ce_a),
        .P1WEN(1'b1),
        .P1OEN(~oe_a),
        .P1ADR({1'b0, addr_a}),
        .P1DI(32'h0000_0000),
        .P1DOUT(do_a),
 
        .P2CK(clk_b),
        .P2CEN(~ce_b),
        .P2WEN(~ce_b),
        .P2OEN(1'b1),
        .P2ADR({1'b0, addr_b}),
        .P2DI(di_b),
        .P2DOUT()
);
 
`else
 
`ifdef OR1200_VIRTUALSILICON_STP_T2
 
//
// Instantiation of ASIC memory:
//
// Virtual Silicon Two-port R/W SRAM Type 2
//
`ifdef UNUSED
vs_hdtp_32x32 #(1<<aw, aw-1, dw-1) vs_ssp(
`else
vs_hdtp_32x32 vs_ssp(
`endif
        .RCK(clk_a),
        .REN(~ce_a),
        .OEN(~oe_a),
        .RADR(addr_a),
        .DOUT(do_a),
 
        .WCK(clk_b),
        .WEN(~ce_b),
        .WADR(addr_b),
        .DI(di_b)
);
 
`else
 
`ifdef OR1200_XILINX_RAM32X1D
 
//
// Instantiation of FPGA memory:
//
// Virtex/Spartan2
//
 
reg     [4:0]    addr_a_r;
 
always @(posedge clk_a or `OR1200_RST_EVENT rst_a)
        if (rst_a == `OR1200_RST_VALUE)
                addr_a_r <=  5'b00000;
        else if (ce_a)
                addr_a_r <=  addr_a;
 
//
// Block 0
//
or1200_xcv_ram32x8d xcv_ram32x8d_0 (
        .DPO(do_a[7:0]),
        .SPO(),
        .A(addr_b),
        .D(di_b[7:0]),
        .DPRA(addr_a_r),
        .WCLK(clk_b),
        .WE(we_b)
);
 
//
// Block 1
//
or1200_xcv_ram32x8d xcv_ram32x8d_1 (
        .DPO(do_a[15:8]),
        .SPO(),
        .A(addr_b),
        .D(di_b[15:8]),
        .DPRA(addr_a_r),
        .WCLK(clk_b),
        .WE(we_b)
);
 
 
//
// Block 2
//
or1200_xcv_ram32x8d xcv_ram32x8d_2 (
        .DPO(do_a[23:16]),
        .SPO(),
        .A(addr_b),
        .D(di_b[23:16]),
        .DPRA(addr_a_r),
        .WCLK(clk_b),
        .WE(we_b)
);
 
//
// Block 3
//
or1200_xcv_ram32x8d xcv_ram32x8d_3 (
        .DPO(do_a[31:24]),
        .SPO(),
        .A(addr_b),
        .D(di_b[31:24]),
        .DPRA(addr_a_r),
        .WCLK(clk_b),
        .WE(we_b)
);
 
`else
 
`ifdef OR1200_XILINX_RAMB4
 
//
// Instantiation of FPGA memory:
//
// Virtex/Spartan2
//
 
//
// Block 0
//
RAMB4_S16_S16 ramb4_s16_0(
        .CLKA(clk_a),
        .RSTA(1'b0),
        .ADDRA({3'b000, addr_a}),
        .DIA(16'h0000),
        .ENA(ce_a),
        .WEA(1'b0),
        .DOA(do_a[15:0]),
 
        .CLKB(clk_b),
        .RSTB(1'b0),
        .ADDRB({3'b000, addr_b}),
        .DIB(di_b[15:0]),
        .ENB(ce_b),
        .WEB(we_b),
        .DOB()
);
 
//
// Block 1
//
RAMB4_S16_S16 ramb4_s16_1(
        .CLKA(clk_a),
        .RSTA(1'b0),
        .ADDRA({3'b000, addr_a}),
        .DIA(16'h0000),
        .ENA(ce_a),
        .WEA(1'b0),
        .DOA(do_a[31:16]),
 
        .CLKB(clk_b),
        .RSTB(1'b0),
        .ADDRB({3'b000, addr_b}),
        .DIB(di_b[31:16]),
        .ENB(ce_b),
        .WEB(we_b),
        .DOB()
);
 
`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(32'h00000000),
        .DIPA(4'h0),
        .ENA(ce_a),
        .WEA(1'b0),
        .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(),
        .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 double-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 address registered
 
//
// Data output drivers
//
assign do_a = (oe_a) ? mem[addr_a_reg] : {dw{1'b0}};
 
//
// RAM read
//
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 write
//
always @(posedge clk_b)
        if (ce_b && we_b)
                mem[addr_b] <=  di_b;
 
`endif  // !OR1200_ALTERA_LPM
`endif  // !OR1200_XILINX_RAMB16
`endif  // !OR1200_XILINX_RAMB4
`endif  // !OR1200_XILINX_RAM32X1D
`endif  // !OR1200_VIRTUALSILICON_SSP_T1
`endif  // !OR1200_VIRTUALSILICON_SSP_T2
`endif  // !OR1200_VIRAGE_STP
`endif  // !OR1200_AVANT_ATP
`endif  // !OR1200_ARTISAN_SDP
 
endmodule

Browse

Tools

Subversion Repositories openrisc

[/] [openrisc/] [trunk/] [or1200/] [rtl/] [verilog/] [or1200_dpram_32x32.v] - Blame information for rev 478

Line No.	Rev	Author	Line
1	10	unneback	`//////////////////////////////////////////////////////////////////////`
2			`//// ////`
3			`//// Generic Double-Port Synchronous RAM ////`
4			`//// ////`
5			`//// This file is part of memory library available from ////`
6			`//// http://www.opencores.org/cvsweb.shtml/generic_memories/ ////`
7			`//// ////`
8			`//// Description ////`
9			`//// This block is a wrapper with common double-port ////`
10			`//// synchronous memory interface for different ////`
11			`//// types of ASIC and FPGA RAMs. Beside universal memory ////`
12			`//// interface it also provides behavioral model of generic ////`
13			`//// double-port synchronous RAM. ////`
14			`//// It should be used in all OPENCORES designs that want to be ////`
15			`//// portable accross different target technologies and ////`
16			`//// independent of target memory. ////`
17			`//// ////`
18			`//// Supported ASIC RAMs are: ////`
19			`//// - Artisan Double-Port Sync RAM ////`
20			`//// - Avant! Two-Port Sync RAM (*) ////`
21			`//// - Virage 2-port Sync RAM ////`
22			`//// ////`
23			`//// Supported FPGA RAMs are: ////`
24			`//// - Xilinx Virtex RAMB16 ////`
25			`//// - Xilinx Virtex RAMB4 ////`
26			`//// - Altera LPM ////`
27			`//// ////`
28			`//// To Do: ////`
29			`//// - fix Avant! ////`
30			`//// - xilinx rams need external tri-state logic ////`
31			`//// - add additional RAMs ////`
32			`//// ////`
33			`//// Author(s): ////`
34			`//// - Damjan Lampret, lampret@opencores.org ////`
35			`//// ////`
36			`//////////////////////////////////////////////////////////////////////`
37			`//// ////`
38			`//// Copyright (C) 2000 Authors and OPENCORES.ORG ////`
39			`//// ////`
40			`//// This source file may be used and distributed without ////`
41			`//// restriction provided that this copyright statement is not ////`
42			`//// removed from the file and that any derivative work contains ////`
43			`//// the original copyright notice and the associated disclaimer. ////`
44			`//// ////`
45			`//// This source file is free software; you can redistribute it ////`
46			`//// and/or modify it under the terms of the GNU Lesser General ////`
47			`//// Public License as published by the Free Software Foundation; ////`
48			`//// either version 2.1 of the License, or (at your option) any ////`
49			`//// later version. ////`
50			`//// ////`
51			`//// This source is distributed in the hope that it will be ////`
52			`//// useful, but WITHOUT ANY WARRANTY; without even the implied ////`
53			`//// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR ////`
54			`//// PURPOSE. See the GNU Lesser General Public License for more ////`
55			`//// details. ////`
56			`//// ////`
57			`//// You should have received a copy of the GNU Lesser General ////`
58			`//// Public License along with this source; if not, download it ////`
59			`//// from http://www.opencores.org/lgpl.shtml ////`
60			`//// ////`
61			`//////////////////////////////////////////////////////////////////////`
62			`//`
63			`// CVS Revision History`
64			`//`
65	141	marcus.erl	`// $Log: or1200_dpram_32x32.v,v $`
66			`// Revision 2.0 2010/06/30 11:00:00 ORSoC`
67			`// Minor update:`
68			`// Coding style changed.`
69			`//`
70			`// Revision 1.10 2005/10/19 11:37:56 jcastillo`
71			`// Added support for RAMB16 Xilinx4/Spartan3 primitives`
72			`//`
73	10	unneback	`// Revision 1.9 2004/06/08 18:15:48 lampret`
74			`// Changed behavior of the simulation generic models`
75			`//`
76			`// Revision 1.8 2004/04/05 08:29:57 lampret`
77			`// Merged branch_qmem into main tree.`
78			`//`
79			`// Revision 1.7.4.1 2003/07/08 15:36:37 lampret`
80			`// Added embedded memory QMEM.`
81			`//`
82			`// Revision 1.7 2003/04/07 01:19:07 lampret`
83			`// Added Altera LPM RAMs. Changed generic RAM output when OE inactive.`
84			`//`
85			`// Revision 1.6 2002/03/28 19:25:42 lampret`
86			`// Added second type of Virtual Silicon two-port SRAM (for register file). Changed defines for VS STP RAMs.`
87			`//`
88			`// Revision 1.5 2002/02/01 19:56:54 lampret`
89			`// Fixed combinational loops.`
90			`//`
91			`// Revision 1.4 2002/01/23 07:52:36 lampret`
92			`// Changed default reset values for SR and ESR to match or1ksim's. Fixed flop model in or1200_dpram_32x32 when OR1200_XILINX_RAM32X1D is defined.`
93			`//`
94			`// Revision 1.3 2002/01/19 14:10:22 lampret`
95			`// Fixed OR1200_XILINX_RAM32X1D.`
96			`//`
97			`// Revision 1.2 2002/01/15 06:12:22 lampret`
98			`// Fixed module name when compiling with OR1200_XILINX_RAM32X1D`
99			`//`
100			`// Revision 1.1 2002/01/03 08:16:15 lampret`
101			`// New prefixes for RTL files, prefixed module names. Updated cache controllers and MMUs.`
102			`//`
103			`// Revision 1.10 2001/11/05 14:48:00 lampret`
104			`// Added missing endif`
105			`//`
106			`// Revision 1.9 2001/11/02 18:57:14 lampret`
107			`// Modified virtual silicon instantiations.`
108			`//`
109			`// Revision 1.8 2001/10/22 19:39:56 lampret`
110			`// Fixed parameters in generic sprams.`
111			`//`
112			`// Revision 1.7 2001/10/21 17:57:16 lampret`
113			`// 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.`
114			`//`
115			`// Revision 1.6 2001/10/14 13:12:09 lampret`
116			`// MP3 version.`
117			`//`
118			`// Revision 1.1.1.1 2001/10/06 10:18:36 igorm`
119			`// no message`
120			`//`
121			`// Revision 1.1 2001/08/09 13:39:33 lampret`
122			`// Major clean-up.`
123			`//`
124			`// Revision 1.2 2001/07/30 05:38:02 lampret`
125			`// Adding empty directories required by HDL coding guidelines`
126			`//`
127			`//`
128
129			`// synopsys translate_off`
130			`include "timescale.v"
131			`// synopsys translate_on`
132			`include "or1200_defines.v"
133
134			`module or1200_dpram_32x32(`
135			`// Generic synchronous double-port RAM interface`
136			`clk_a, rst_a, ce_a, oe_a, addr_a, do_a,`
137			`clk_b, rst_b, ce_b, we_b, addr_b, di_b`
138			`);`
139
140			`//`
141			`// Default address and data buses width`
142			`//`
143			`parameter aw = 5;`
144			`parameter dw = 32;`
145
146			`//`
147			`// Generic synchronous double-port RAM interface`
148			`//`
149			`input clk_a; // Clock`
150			`input rst_a; // Reset`
151			`input ce_a; // Chip enable input`
152			`input oe_a; // Output enable input`
153			`input [aw-1:0] addr_a; // address bus inputs`
154			`output [dw-1:0] do_a; // output data bus`
155			`input clk_b; // Clock`
156			`input rst_b; // Reset`
157			`input ce_b; // Chip enable input`
158			`input we_b; // Write enable input`
159			`input [aw-1:0] addr_b; // address bus inputs`
160			`input [dw-1:0] di_b; // input data bus`
161
162			`//`
163			`// Internal wires and registers`
164			`//`
165
166			`ifdef OR1200_ARTISAN_SDP
167
168			`//`
169			`// Instantiation of ASIC memory:`
170			`//`
171			`// Artisan Synchronous Double-Port RAM (ra2sh)`
172			`//`
173			`ifdef UNUSED
174			`art_hsdp_32x32 #(dw, 1<<aw, aw) artisan_sdp(`
175			`else
176			`art_hsdp_32x32 artisan_sdp(`
177			`endif
178			`.qa(do_a),`
179			`.clka(clk_a),`
180			`.cena(~ce_a),`
181			`.wena(1'b1),`
182			`.aa(addr_a),`
183			`.da(32'h00000000),`
184			`.oena(~oe_a),`
185			`.qb(),`
186			`.clkb(clk_b),`
187			`.cenb(~ce_b),`
188			`.wenb(~we_b),`
189			`.ab(addr_b),`
190			`.db(di_b),`
191			`.oenb(1'b1)`
192			`);`
193
194			`else
195
196			`ifdef OR1200_AVANT_ATP
197
198			`//`
199			`// Instantiation of ASIC memory:`
200			`//`
201			`// Avant! Asynchronous Two-Port RAM`
202			`//`
203			`avant_atp avant_atp(`
204			`.web(~we),`
205			`.reb(),`
206			`.oeb(~oe),`
207			`.rcsb(),`
208			`.wcsb(),`
209			`.ra(addr),`
210			`.wa(addr),`
211			`.di(di),`
212			`.doq(doq)`
213			`);`
214
215			`else
216
217			`ifdef OR1200_VIRAGE_STP
218
219			`//`
220			`// Instantiation of ASIC memory:`
221			`//`
222			`// Virage Synchronous 2-port R/W RAM`
223			`//`
224			`virage_stp virage_stp(`
225			`.QA(do_a),`
226			`.QB(),`
227
228			`.ADRA(addr_a),`
229			`.DA(32'h00000000),`
230			`.WEA(1'b0),`
231			`.OEA(oe_a),`
232			`.MEA(ce_a),`
233			`.CLKA(clk_a),`
234
235			`.ADRB(addr_b),`
236			`.DB(di_b),`
237			`.WEB(we_b),`
238			`.OEB(1'b1),`
239			`.MEB(ce_b),`
240			`.CLKB(clk_b)`
241			`);`
242
243			`else
244
245			`ifdef OR1200_VIRTUALSILICON_STP_T1
246
247			`//`
248			`// Instantiation of ASIC memory:`
249			`//`
250			`// Virtual Silicon Two-port R/W SRAM Type 1`
251			`//`
252			`ifdef UNUSED
253			`vs_hdtp_64x32 #(1<<aw, aw-1, dw-1) vs_ssp(`
254			`else
255			`vs_hdtp_64x32 vs_ssp(`
256			`endif
257			`.P1CK(clk_a),`
258			`.P1CEN(~ce_a),`
259			`.P1WEN(1'b1),`
260			`.P1OEN(~oe_a),`
261			`.P1ADR({1'b0, addr_a}),`
262			`.P1DI(32'h0000_0000),`
263			`.P1DOUT(do_a),`
264
265			`.P2CK(clk_b),`
266			`.P2CEN(~ce_b),`
267			`.P2WEN(~ce_b),`
268			`.P2OEN(1'b1),`
269			`.P2ADR({1'b0, addr_b}),`
270			`.P2DI(di_b),`
271			`.P2DOUT()`
272			`);`
273
274			`else
275
276			`ifdef OR1200_VIRTUALSILICON_STP_T2
277
278			`//`
279			`// Instantiation of ASIC memory:`
280			`//`
281			`// Virtual Silicon Two-port R/W SRAM Type 2`
282			`//`
283			`ifdef UNUSED
284			`vs_hdtp_32x32 #(1<<aw, aw-1, dw-1) vs_ssp(`
285			`else
286			`vs_hdtp_32x32 vs_ssp(`
287			`endif
288			`.RCK(clk_a),`
289			`.REN(~ce_a),`
290			`.OEN(~oe_a),`
291			`.RADR(addr_a),`
292			`.DOUT(do_a),`
293
294			`.WCK(clk_b),`
295			`.WEN(~ce_b),`
296			`.WADR(addr_b),`
297			`.DI(di_b)`
298			`);`
299
300			`else
301
302			`ifdef OR1200_XILINX_RAM32X1D
303
304			`//`
305			`// Instantiation of FPGA memory:`
306			`//`
307			`// Virtex/Spartan2`
308			`//`
309
310			`reg [4:0] addr_a_r;`
311
312	358	julius	always @(posedge clk_a or `OR1200_RST_EVENT rst_a)
313			if (rst_a == `OR1200_RST_VALUE)
314	258	julius	`addr_a_r <= 5'b00000;`
315	10	unneback	`else if (ce_a)`
316	258	julius	`addr_a_r <= addr_a;`
317	10	unneback
318			`//`
319			`// Block 0`
320			`//`
321			`or1200_xcv_ram32x8d xcv_ram32x8d_0 (`
322			`.DPO(do_a[7:0]),`
323			`.SPO(),`
324			`.A(addr_b),`
325			`.D(di_b[7:0]),`
326			`.DPRA(addr_a_r),`
327			`.WCLK(clk_b),`
328			`.WE(we_b)`
329			`);`
330
331			`//`
332			`// Block 1`
333			`//`
334			`or1200_xcv_ram32x8d xcv_ram32x8d_1 (`
335			`.DPO(do_a[15:8]),`
336			`.SPO(),`
337			`.A(addr_b),`
338			`.D(di_b[15:8]),`
339			`.DPRA(addr_a_r),`
340			`.WCLK(clk_b),`
341			`.WE(we_b)`
342			`);`
343
344
345			`//`
346			`// Block 2`
347			`//`
348			`or1200_xcv_ram32x8d xcv_ram32x8d_2 (`
349			`.DPO(do_a[23:16]),`
350			`.SPO(),`
351			`.A(addr_b),`
352			`.D(di_b[23:16]),`
353			`.DPRA(addr_a_r),`
354			`.WCLK(clk_b),`
355			`.WE(we_b)`
356			`);`
357
358			`//`
359			`// Block 3`
360			`//`
361			`or1200_xcv_ram32x8d xcv_ram32x8d_3 (`
362			`.DPO(do_a[31:24]),`
363			`.SPO(),`
364			`.A(addr_b),`
365			`.D(di_b[31:24]),`
366			`.DPRA(addr_a_r),`
367			`.WCLK(clk_b),`
368			`.WE(we_b)`
369			`);`
370
371			`else
372
373			`ifdef OR1200_XILINX_RAMB4
374
375			`//`
376			`// Instantiation of FPGA memory:`
377			`//`
378			`// Virtex/Spartan2`
379			`//`
380
381			`//`
382			`// Block 0`
383			`//`
384			`RAMB4_S16_S16 ramb4_s16_0(`
385			`.CLKA(clk_a),`
386	141	marcus.erl	`.RSTA(1'b0),`
387	10	unneback	`.ADDRA({3'b000, addr_a}),`
388			`.DIA(16'h0000),`
389			`.ENA(ce_a),`
390			`.WEA(1'b0),`
391			`.DOA(do_a[15:0]),`
392
393			`.CLKB(clk_b),`
394	141	marcus.erl	`.RSTB(1'b0),`
395	10	unneback	`.ADDRB({3'b000, addr_b}),`
396			`.DIB(di_b[15:0]),`
397			`.ENB(ce_b),`
398			`.WEB(we_b),`
399			`.DOB()`
400			`);`
401
402			`//`
403			`// Block 1`
404			`//`
405			`RAMB4_S16_S16 ramb4_s16_1(`
406			`.CLKA(clk_a),`
407	141	marcus.erl	`.RSTA(1'b0),`
408	10	unneback	`.ADDRA({3'b000, addr_a}),`
409			`.DIA(16'h0000),`
410			`.ENA(ce_a),`
411			`.WEA(1'b0),`
412			`.DOA(do_a[31:16]),`
413
414			`.CLKB(clk_b),`
415	141	marcus.erl	`.RSTB(1'b0),`
416	10	unneback	`.ADDRB({3'b000, addr_b}),`
417			`.DIB(di_b[31:16]),`
418			`.ENB(ce_b),`
419			`.WEB(we_b),`
420			`.DOB()`
421			`);`
422
423			`else
424
425			`ifdef OR1200_XILINX_RAMB16
426
427			`//`
428			`// Instantiation of FPGA memory:`
429			`//`
430			`// Virtex4/Spartan3E`
431			`//`
432			`// Added By Nir Mor`
433			`//`
434
435			`RAMB16_S36_S36 ramb16_s36_s36(`
436			`.CLKA(clk_a),`
437	141	marcus.erl	`.SSRA(1'b0),`
438	10	unneback	`.ADDRA({4'b0000, addr_a}),`
439			`.DIA(32'h00000000),`
440			`.DIPA(4'h0),`
441			`.ENA(ce_a),`
442			`.WEA(1'b0),`
443			`.DOA(do_a),`
444			`.DOPA(),`
445
446			`.CLKB(clk_b),`
447	141	marcus.erl	`.SSRB(1'b0),`
448	10	unneback	`.ADDRB({4'b0000, addr_b}),`
449			`.DIB(di_b),`
450			`.DIPB(4'h0),`
451			`.ENB(ce_b),`
452			`.WEB(we_b),`
453			`.DOB(),`
454			`.DOPB()`
455			`);`
456
457			`else
458
459			`ifdef OR1200_ALTERA_LPM_XXX
460
461			`//`
462			`// Instantiation of FPGA memory:`
463			`//`
464			`// Altera LPM`
465			`//`
466			`// Added By Jamil Khatib`
467			`//`
468			`altqpram altqpram_component (`
469			`.wraddress_a (addr_a),`
470			`.inclocken_a (ce_a),`
471			`.wraddress_b (addr_b),`
472			`.wren_a (we_a),`
473			`.inclocken_b (ce_b),`
474			`.wren_b (we_b),`
475	141	marcus.erl	`.inaclr_a (1'b0),`
476			`.inaclr_b (1'b0),`
477	10	unneback	`.inclock_a (clk_a),`
478			`.inclock_b (clk_b),`
479			`.data_a (di_a),`
480			`.data_b (di_b),`
481			`.q_a (do_a),`
482			`.q_b (do_b)`
483			`);`
484
485			`defparam altqpram_component.operation_mode = "BIDIR_DUAL_PORT",`
486			`altqpram_component.width_write_a = dw,`
487			`altqpram_component.widthad_write_a = aw,`
488			`altqpram_component.numwords_write_a = dw,`
489			`altqpram_component.width_read_a = dw,`
490			`altqpram_component.widthad_read_a = aw,`
491			`altqpram_component.numwords_read_a = dw,`
492			`altqpram_component.width_write_b = dw,`
493			`altqpram_component.widthad_write_b = aw,`
494			`altqpram_component.numwords_write_b = dw,`
495			`altqpram_component.width_read_b = dw,`
496			`altqpram_component.widthad_read_b = aw,`
497			`altqpram_component.numwords_read_b = dw,`
498			`altqpram_component.indata_reg_a = "INCLOCK_A",`
499			`altqpram_component.wrcontrol_wraddress_reg_a = "INCLOCK_A",`
500			`altqpram_component.outdata_reg_a = "INCLOCK_A",`
501			`altqpram_component.indata_reg_b = "INCLOCK_B",`
502			`altqpram_component.wrcontrol_wraddress_reg_b = "INCLOCK_B",`
503			`altqpram_component.outdata_reg_b = "INCLOCK_B",`
504			`altqpram_component.indata_aclr_a = "INACLR_A",`
505			`altqpram_component.wraddress_aclr_a = "INACLR_A",`
506			`altqpram_component.wrcontrol_aclr_a = "INACLR_A",`
507			`altqpram_component.outdata_aclr_a = "INACLR_A",`
508			`altqpram_component.indata_aclr_b = "NONE",`
509			`altqpram_component.wraddress_aclr_b = "NONE",`
510			`altqpram_component.wrcontrol_aclr_b = "NONE",`
511			`altqpram_component.outdata_aclr_b = "INACLR_B",`
512			`altqpram_component.lpm_hint = "USE_ESB=ON";`
513			`//examplar attribute altqpram_component NOOPT TRUE`
514
515			`else
516
517			`//`
518			`// Generic double-port synchronous RAM model`
519			`//`
520
521			`//`
522			`// Generic RAM's registers and wires`
523			`//`
524			`reg [dw-1:0] mem [(1<<aw)-1:0]; // RAM content`
525			`reg [aw-1:0] addr_a_reg; // RAM address registered`
526
527			`//`
528			`// Data output drivers`
529			`//`
530			`assign do_a = (oe_a) ? mem[addr_a_reg] : {dw{1'b0}};`
531
532			`//`
533			`// RAM read`
534			`//`
535	358	julius	always @(posedge clk_a or `OR1200_RST_EVENT rst_a)
536			if (rst_a == `OR1200_RST_VALUE)
537	258	julius	`addr_a_reg <= {aw{1'b0}};`
538	10	unneback	`else if (ce_a)`
539	258	julius	`addr_a_reg <= addr_a;`
540	10	unneback
541			`//`
542			`// RAM write`
543			`//`
544			`always @(posedge clk_b)`
545			`if (ce_b && we_b)`
546	258	julius	`mem[addr_b] <= di_b;`
547	10	unneback
548			`endif // !OR1200_ALTERA_LPM
549			`endif // !OR1200_XILINX_RAMB16
550			`endif // !OR1200_XILINX_RAMB4
551			`endif // !OR1200_XILINX_RAM32X1D
552			`endif // !OR1200_VIRTUALSILICON_SSP_T1
553			`endif // !OR1200_VIRTUALSILICON_SSP_T2
554			`endif // !OR1200_VIRAGE_STP
555			`endif // !OR1200_AVANT_ATP
556			`endif // !OR1200_ARTISAN_SDP
557
558			`endmodule`