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[/] [sdr_ctrl/] [trunk/] [verif/] [tb/] [tb_top.sv] - Rev 56
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//////////////////////////////////////////////////////////////////////
//// ////
//// ////
//// This file is part of the SDRAM Controller project ////
//// http://www.opencores.org/cores/sdr_ctrl/ ////
//// ////
//// Description ////
//// SDRAM CTRL definitions. ////
//// ////
//// To Do: ////
//// nothing ////
//// ////
// Version :0.1 - Test Bench automation is improvised with ////
// seperate data,address,burst length fifo. ////
// Now user can create different write and ////
// read sequence ////
// ////
//// Author(s): ////
//// - Dinesh Annayya, dinesha@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 ////
//// ////
//////////////////////////////////////////////////////////////////////
`timescale 1ns/1ps
// This testbench verify with SDRAM TOP
module tb_top;
parameter P_SYS = 10; // 200MHz
parameter P_SDR = 20; // 100MHz
// General
reg RESETN;
reg sdram_clk;
reg sys_clk;
initial sys_clk = 0;
initial sdram_clk = 0;
always #(P_SYS/2) sys_clk = !sys_clk;
always #(P_SDR/2) sdram_clk = !sdram_clk;
parameter dw = 32; // data width
parameter tw = 8; // tag id width
parameter bl = 5; // burst_lenght_width
//-------------------------------------------
// WISH BONE Interface
//-------------------------------------------
//--------------------------------------
// Wish Bone Interface
// -------------------------------------
reg wb_stb_i ;
wire wb_ack_o ;
reg [24:0] wb_addr_i ;
reg wb_we_i ; // 1 - Write, 0 - Read
reg [dw-1:0] wb_dat_i ;
reg [dw/8-1:0] wb_sel_i ; // Byte enable
wire [dw-1:0] wb_dat_o ;
reg wb_cyc_i ;
reg [2:0] wb_cti_i ;
//--------------------------------------------
// SDRAM I/F
//--------------------------------------------
`ifdef SDR_32BIT
wire [31:0] Dq ; // SDRAM Read/Write Data Bus
wire [3:0] sdr_dqm ; // SDRAM DATA Mask
`elsif SDR_16BIT
wire [15:0] Dq ; // SDRAM Read/Write Data Bus
wire [1:0] sdr_dqm ; // SDRAM DATA Mask
`else
wire [7:0] Dq ; // SDRAM Read/Write Data Bus
wire [0:0] sdr_dqm ; // SDRAM DATA Mask
`endif
wire [1:0] sdr_ba ; // SDRAM Bank Select
wire [11:0] sdr_addr ; // SDRAM ADRESS
wire sdr_init_done ; // SDRAM Init Done
// to fix the sdram interface timing issue
wire #(2.0) sdram_clk_d = sdram_clk;
`ifdef SDR_32BIT
sdrc_top #(.SDR_DW(32),.SDR_BW(4)) u_dut(
`elsif SDR_16BIT
sdrc_top #(.SDR_DW(16),.SDR_BW(2)) u_dut(
`else // 8 BIT SDRAM
sdrc_top #(.SDR_DW(8),.SDR_BW(1)) u_dut(
`endif
// System
`ifdef SDR_32BIT
.cfg_sdr_width (2'b00 ), // 32 BIT SDRAM
`elsif SDR_16BIT
.cfg_sdr_width (2'b01 ), // 16 BIT SDRAM
`else
.cfg_sdr_width (2'b10 ), // 8 BIT SDRAM
`endif
.cfg_colbits (2'b00 ), // 8 Bit Column Address
/* WISH BONE */
.wb_rst_i (!RESETN ),
.wb_clk_i (sys_clk ),
.wb_stb_i (wb_stb_i ),
.wb_ack_o (wb_ack_o ),
.wb_addr_i (wb_addr_i ),
.wb_we_i (wb_we_i ),
.wb_dat_i (wb_dat_i ),
.wb_sel_i (wb_sel_i ),
.wb_dat_o (wb_dat_o ),
.wb_cyc_i (wb_cyc_i ),
.wb_cti_i (wb_cti_i ),
/* Interface to SDRAMs */
.sdram_clk (sdram_clk ),
.sdram_resetn (RESETN ),
.sdr_cs_n (sdr_cs_n ),
.sdr_cke (sdr_cke ),
.sdr_ras_n (sdr_ras_n ),
.sdr_cas_n (sdr_cas_n ),
.sdr_we_n (sdr_we_n ),
.sdr_dqm (sdr_dqm ),
.sdr_ba (sdr_ba ),
.sdr_addr (sdr_addr ),
.sdr_dq (Dq ),
/* Parameters */
.sdr_init_done (sdr_init_done ),
.cfg_req_depth (2'h3 ), //how many req. buffer should hold
.cfg_sdr_en (1'b1 ),
.cfg_sdr_mode_reg (12'h033 ),
.cfg_sdr_tras_d (4'h4 ),
.cfg_sdr_trp_d (4'h2 ),
.cfg_sdr_trcd_d (4'h2 ),
.cfg_sdr_cas (3'h3 ),
.cfg_sdr_trcar_d (4'h7 ),
.cfg_sdr_twr_d (4'h1 ),
.cfg_sdr_rfsh (12'h100 ), // reduced from 12'hC35
.cfg_sdr_rfmax (3'h6 )
);
`ifdef SDR_32BIT
mt48lc2m32b2 #(.data_bits(32)) u_sdram32 (
.Dq (Dq ) ,
.Addr (sdr_addr ),
.Ba (sdr_ba ),
.Clk (sdram_clk_d ),
.Cke (sdr_cke ),
.Cs_n (sdr_cs_n ),
.Ras_n (sdr_ras_n ),
.Cas_n (sdr_cas_n ),
.We_n (sdr_we_n ),
.Dqm (sdr_dqm )
);
`elsif SDR_16BIT
IS42VM16400K u_sdram16 (
.dq (Dq ),
.addr (sdr_addr ),
.ba (sdr_ba ),
.clk (sdram_clk_d ),
.cke (sdr_cke ),
.csb (sdr_cs_n ),
.rasb (sdr_ras_n ),
.casb (sdr_cas_n ),
.web (sdr_we_n ),
.dqm (sdr_dqm )
);
`else
mt48lc8m8a2 #(.data_bits(8)) u_sdram8 (
.Dq (Dq ) ,
.Addr (sdr_addr ),
.Ba (sdr_ba ),
.Clk (sdram_clk_d ),
.Cke (sdr_cke ),
.Cs_n (sdr_cs_n ),
.Ras_n (sdr_ras_n ),
.Cas_n (sdr_cas_n ),
.We_n (sdr_we_n ),
.Dqm (sdr_dqm )
);
`endif
//--------------------
// data/address/burst length FIFO
//--------------------
int dfifo[$]; // data fifo
int afifo[$]; // address fifo
int bfifo[$]; // Burst Length fifo
reg [31:0] read_data;
reg [31:0] ErrCnt;
int k;
reg [31:0] StartAddr;
/////////////////////////////////////////////////////////////////////////
// Test Case
/////////////////////////////////////////////////////////////////////////
initial begin //{
ErrCnt = 0;
wb_addr_i = 0;
wb_dat_i = 0;
wb_sel_i = 4'h0;
wb_we_i = 0;
wb_stb_i = 0;
wb_cyc_i = 0;
RESETN = 1'h1;
#100
// Applying reset
RESETN = 1'h0;
#10000;
// Releasing reset
RESETN = 1'h1;
#1000;
wait(u_dut.sdr_init_done == 1);
#1000;
$display("-------------------------------------- ");
$display(" Case-1: Single Write/Read Case ");
$display("-------------------------------------- ");
burst_write(32'h4_0000,8'h4);
#1000;
burst_read();
// Repeat one more time to analysis the
// SDRAM state change for same col/row address
$display("-------------------------------------- ");
$display(" Case-2: Repeat same transfer once again ");
$display("----------------------------------------");
burst_write(32'h4_0000,8'h4);
burst_read();
burst_write(32'h0040_0000,8'h5);
burst_read();
$display("----------------------------------------");
$display(" Case-3 Create a Page Cross Over ");
$display("----------------------------------------");
burst_write(32'h0000_0FF0,8'h8);
burst_write(32'h0001_0FF4,8'hF);
burst_write(32'h0002_0FF8,8'hF);
burst_write(32'h0003_0FFC,8'hF);
burst_write(32'h0004_0FE0,8'hF);
burst_write(32'h0005_0FE4,8'hF);
burst_write(32'h0006_0FE8,8'hF);
burst_write(32'h0007_0FEC,8'hF);
burst_write(32'h0008_0FD0,8'hF);
burst_write(32'h0009_0FD4,8'hF);
burst_write(32'h000A_0FD8,8'hF);
burst_write(32'h000B_0FDC,8'hF);
burst_write(32'h000C_0FC0,8'hF);
burst_write(32'h000D_0FC4,8'hF);
burst_write(32'h000E_0FC8,8'hF);
burst_write(32'h000F_0FCC,8'hF);
burst_write(32'h0010_0FB0,8'hF);
burst_write(32'h0011_0FB4,8'hF);
burst_write(32'h0012_0FB8,8'hF);
burst_write(32'h0013_0FBC,8'hF);
burst_write(32'h0014_0FA0,8'hF);
burst_write(32'h0015_0FA4,8'hF);
burst_write(32'h0016_0FA8,8'hF);
burst_write(32'h0017_0FAC,8'hF);
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
$display("----------------------------------------");
$display(" Case:4 4 Write & 4 Read ");
$display("----------------------------------------");
burst_write(32'h4_0000,8'h4);
burst_write(32'h5_0000,8'h5);
burst_write(32'h6_0000,8'h6);
burst_write(32'h7_0000,8'h7);
burst_read();
burst_read();
burst_read();
burst_read();
$display("---------------------------------------");
$display(" Case:5 24 Write & 24 Read With Different Bank and Row ");
$display("---------------------------------------");
//----------------------------------------
// Address Decodeing:
// with cfg_col bit configured as: 00
// <12 Bit Row> <2 Bit Bank> <8 Bit Column> <2'b00>
//
burst_write({12'h000,2'b00,8'h00,2'b00},8'h4); // Row: 0 Bank : 0
burst_write({12'h000,2'b01,8'h00,2'b00},8'h5); // Row: 0 Bank : 1
burst_write({12'h000,2'b10,8'h00,2'b00},8'h6); // Row: 0 Bank : 2
burst_write({12'h000,2'b11,8'h00,2'b00},8'h7); // Row: 0 Bank : 3
burst_write({12'h001,2'b00,8'h00,2'b00},8'h4); // Row: 1 Bank : 0
burst_write({12'h001,2'b01,8'h00,2'b00},8'h5); // Row: 1 Bank : 1
burst_write({12'h001,2'b10,8'h00,2'b00},8'h6); // Row: 1 Bank : 2
burst_write({12'h001,2'b11,8'h00,2'b00},8'h7); // Row: 1 Bank : 3
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_write({12'h002,2'b00,8'h00,2'b00},8'h4); // Row: 2 Bank : 0
burst_write({12'h002,2'b01,8'h00,2'b00},8'h5); // Row: 2 Bank : 1
burst_write({12'h002,2'b10,8'h00,2'b00},8'h6); // Row: 2 Bank : 2
burst_write({12'h002,2'b11,8'h00,2'b00},8'h7); // Row: 2 Bank : 3
burst_write({12'h003,2'b00,8'h00,2'b00},8'h4); // Row: 3 Bank : 0
burst_write({12'h003,2'b01,8'h00,2'b00},8'h5); // Row: 3 Bank : 1
burst_write({12'h003,2'b10,8'h00,2'b00},8'h6); // Row: 3 Bank : 2
burst_write({12'h003,2'b11,8'h00,2'b00},8'h7); // Row: 3 Bank : 3
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_write({12'h002,2'b00,8'h00,2'b00},8'h4); // Row: 2 Bank : 0
burst_write({12'h002,2'b01,8'h01,2'b00},8'h5); // Row: 2 Bank : 1
burst_write({12'h002,2'b10,8'h02,2'b00},8'h6); // Row: 2 Bank : 2
burst_write({12'h002,2'b11,8'h03,2'b00},8'h7); // Row: 2 Bank : 3
burst_write({12'h003,2'b00,8'h04,2'b00},8'h4); // Row: 3 Bank : 0
burst_write({12'h003,2'b01,8'h05,2'b00},8'h5); // Row: 3 Bank : 1
burst_write({12'h003,2'b10,8'h06,2'b00},8'h6); // Row: 3 Bank : 2
burst_write({12'h003,2'b11,8'h07,2'b00},8'h7); // Row: 3 Bank : 3
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
burst_read();
$display("---------------------------------------------------");
$display(" Case: 6 Random 2 write and 2 read random");
$display("---------------------------------------------------");
for(k=0; k < 20; k++) begin
StartAddr = $random & 32'h003FFFFF;
burst_write(StartAddr,($random & 8'h0f)+1);
#100;
StartAddr = $random & 32'h003FFFFF;
burst_write(StartAddr,($random & 8'h0f)+1);
#100;
burst_read();
#100;
burst_read();
#100;
end
#10000;
$display("###############################");
if(ErrCnt == 0)
$display("STATUS: SDRAM Write/Read TEST PASSED");
else
$display("ERROR: SDRAM Write/Read TEST FAILED");
$display("###############################");
$finish;
end
task burst_write;
input [31:0] Address;
input [7:0] bl;
int i;
begin
afifo.push_back(Address);
bfifo.push_back(bl);
@ (negedge sys_clk);
$display("Write Address: %x, Burst Size: %d",Address,bl);
for(i=0; i < bl; i++) begin
wb_stb_i = 1;
wb_cyc_i = 1;
wb_we_i = 1;
wb_sel_i = 4'b1111;
wb_addr_i = Address[31:2]+i;
wb_dat_i = $random & 32'hFFFFFFFF;
dfifo.push_back(wb_dat_i);
do begin
@ (posedge sys_clk);
end while(wb_ack_o == 1'b0);
@ (negedge sys_clk);
$display("Status: Burst-No: %d Write Address: %x WriteData: %x ",i,wb_addr_i,wb_dat_i);
end
wb_stb_i = 0;
wb_cyc_i = 0;
wb_we_i = 'hx;
wb_sel_i = 'hx;
wb_addr_i = 'hx;
wb_dat_i = 'hx;
end
endtask
task burst_read;
reg [31:0] Address;
reg [7:0] bl;
int i,j;
reg [31:0] exp_data;
begin
Address = afifo.pop_front();
bl = bfifo.pop_front();
@ (negedge sys_clk);
for(j=0; j < bl; j++) begin
wb_stb_i = 1;
wb_cyc_i = 1;
wb_we_i = 0;
wb_addr_i = Address[31:2]+j;
exp_data = dfifo.pop_front(); // Exptected Read Data
do begin
@ (posedge sys_clk);
end while(wb_ack_o == 1'b0);
if(wb_dat_o !== exp_data) begin
$display("READ ERROR: Burst-No: %d Addr: %x Rxp: %x Exd: %x",j,wb_addr_i,wb_dat_o,exp_data);
ErrCnt = ErrCnt+1;
end else begin
$display("READ STATUS: Burst-No: %d Addr: %x Rxd: %x",j,wb_addr_i,wb_dat_o);
end
@ (negedge sdram_clk);
end
wb_stb_i = 0;
wb_cyc_i = 0;
wb_we_i = 'hx;
wb_addr_i = 'hx;
end
endtask
endmodule
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