From 0c70ec565302cf49b226d30a6295b1bbc92ebb49 Mon Sep 17 00:00:00 2001
From: tmeissner <programming@goodcleanfun.de>
Date: Mon, 25 Mar 2013 00:18:41 +0100
Subject: [PATCH] initial commit of verilog simulation environment for verilog
 cbcdes core

---
 cbcdes/sim/verilog/makefile      | 41 +++++++++++++++++
 cbcdes/sim/verilog/tb_cbcdes.tcl | 13 ++++++
 cbcdes/sim/verilog/tb_cbcdes.v   | 76 ++++++++++++++++++++++++++++++++
 3 files changed, 130 insertions(+)
 create mode 100644 cbcdes/sim/verilog/makefile
 create mode 100644 cbcdes/sim/verilog/tb_cbcdes.tcl
 create mode 100644 cbcdes/sim/verilog/tb_cbcdes.v

diff --git a/cbcdes/sim/verilog/makefile b/cbcdes/sim/verilog/makefile
new file mode 100644
index 0000000..941b48f
--- /dev/null
+++ b/cbcdes/sim/verilog/makefile
@@ -0,0 +1,41 @@
+# ======================================================================
+# DES encryption/decryption
+# algorithm according to FIPS 46-3 specification
+# Copyright (C) 2012 Torsten Meissner
+#-----------------------------------------------------------------------
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+
+# This program 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 General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+# ======================================================================
+
+
+SRC_FILES = tb_cbcdes.v ../../rtl/verilog/cbcdes.v ../../rtl/verilog/des.v
+SIM_FILES = 
+
+
+all : sim wave
+
+sim : tb_cbcdes.vcd
+
+
+tb_cbcdes.vcd : $(SRC_FILES) $(SIM_FILES)
+	iverilog -Wall -s tb_cbcdes -o tb_cbcdes $(SRC_FILES)
+	vvp tb_cbcdes
+
+wave : tb_cbcdes.vcd
+	gtkwave -T tb_cbcdes.tcl tb_cbcdes.vcd
+	
+clean :
+	echo "# cleaning simulation files"
+	rm -f tb_cbcdes
+	rm -f tb_cbcdes.vcd
diff --git a/cbcdes/sim/verilog/tb_cbcdes.tcl b/cbcdes/sim/verilog/tb_cbcdes.tcl
new file mode 100644
index 0000000..ccc46d5
--- /dev/null
+++ b/cbcdes/sim/verilog/tb_cbcdes.tcl
@@ -0,0 +1,13 @@
+set signals [list]
+lappend signals "tb_cdes.reset"
+lappend signals "tb_cdes.clk"
+lappend signals "tb_cdes.start"
+lappend signals "tb_cdes.validin"
+lappend signals "tb_cdes.mode"
+lappend signals "tb_cdes.key"
+lappend signals "tb_cdes.iv"
+lappend signals "tb_cdes.datain"
+lappend signals "tb_cdes.readyout"
+lappend signals "tb_cdes.validout"
+lappend signals "tb_cdes.dataout"
+set num_added [ gtkwave::addSignalsFromList $signals ]
diff --git a/cbcdes/sim/verilog/tb_cbcdes.v b/cbcdes/sim/verilog/tb_cbcdes.v
new file mode 100644
index 0000000..e788023
--- /dev/null
+++ b/cbcdes/sim/verilog/tb_cbcdes.v
@@ -0,0 +1,76 @@
+// ======================================================================
+// DES encryption/decryption testbench
+// tests according to NIST 800-17 special publication
+// Copyright (C) 2012 Torsten Meissner
+//-----------------------------------------------------------------------
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 2 of the License, or
+// (at your option) any later version.
+//
+// This program 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 General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+// ======================================================================
+
+`timescale 1ns/1ps
+
+
+
+module tb_cbcdes;
+
+
+  // set dumpfile
+  initial begin
+     $dumpfile ("tb_cbcdes.vcd");
+     $dumpvars (0, tb_cbcdes);
+  end
+
+
+  reg reset;
+  reg clk = 0;
+  reg mode;
+  reg [0:63] key;
+  reg [0:63] datain;
+  reg validin;
+  reg start;
+  reg [0:63] iv;
+  wire [0:63] dataout;
+  wire validout;
+  wire readyout;
+
+
+  // setup simulation
+  initial begin
+    reset = 1;
+    #1  reset = 0;
+    #20 reset = 1;
+  end
+
+
+  // generate clock with 100 mhz
+  always #5 clk = !clk;
+
+
+  // dut
+  cbcdes i_cbcdes (
+    .reset_i(reset),
+    .clk_i(clk),
+    .start_i(start),
+    .mode_i(mode),
+    .key_i(key),
+    .iv_i(iv),
+    .data_i(datain),
+    .valid_i(validin),
+    .ready_o(readyout),
+    .data_o(dataout),
+    .valid_o(validout)
+  );
+
+
+endmodule