From bf014cbaefe21ac07af4b9afaf23505b0f713f08 Mon Sep 17 00:00:00 2001
From: tmeissner <programming@goodcleanfun.de>
Date: Sun, 20 Mar 2016 17:55:34 +0100
Subject: [PATCH] Initial commit of PSL endpoint test design

---
 psl_test_endpoint/Makefile              | 33 ++++++++++++
 psl_test_endpoint/psl_test_endpoint.tcl |  6 +++
 psl_test_endpoint/psl_test_endpoint.vhd | 70 +++++++++++++++++++++++++
 3 files changed, 109 insertions(+)
 create mode 100644 psl_test_endpoint/Makefile
 create mode 100644 psl_test_endpoint/psl_test_endpoint.tcl
 create mode 100644 psl_test_endpoint/psl_test_endpoint.vhd

diff --git a/psl_test_endpoint/Makefile b/psl_test_endpoint/Makefile
new file mode 100644
index 0000000..418630d
--- /dev/null
+++ b/psl_test_endpoint/Makefile
@@ -0,0 +1,33 @@
+.PHONY: sim compile clean wave
+
+
+sim \
+work/psl_test_endpoint \
+work/psl_test_endpoint.ghw: work/psl_test_endpoint.o log
+	@echo Run test ...
+	@cd work; ghdl -r --std=08 -fpsl psl_test_endpoint \
+	                  --psl-report=../log/psl_test_endpoint.json \
+	                  --wave=../log/psl_test_endpoint.ghw \
+	                  --stop-time=200ns
+
+
+compile \
+work/psl_test_endpoint.o: psl_test_endpoint.vhd work
+	@echo "Analyse & elaborate test ..."
+	cd work; ghdl -a --std=08 -fpsl ../psl_test_endpoint.vhd
+	cd work; ghdl -e --std=08 -fpsl psl_test_endpoint
+
+
+wave: work/psl_test_endpoint.ghw
+	@echo Run waveform viewer ...
+	@gtkwave log/psl_test_endpoint.ghw -S psl_test_endpoint.tcl &
+
+
+work \
+log:
+	mkdir $@
+
+
+clean:
+	@echo Remove generated files ...
+	@rm -rf work log
diff --git a/psl_test_endpoint/psl_test_endpoint.tcl b/psl_test_endpoint/psl_test_endpoint.tcl
new file mode 100644
index 0000000..befcee9
--- /dev/null
+++ b/psl_test_endpoint/psl_test_endpoint.tcl
@@ -0,0 +1,6 @@
+set signals [list]
+lappend signals "top.psl_test_endpoint.s_rst_n"
+lappend signals "top.psl_test_endpoint.s_clk"
+lappend signals "top.psl_test_endpoint.s_write"
+lappend signals "top.psl_test_endpoint.s_read"
+set num_added [ gtkwave::addSignalsFromList $signals ]
diff --git a/psl_test_endpoint/psl_test_endpoint.vhd b/psl_test_endpoint/psl_test_endpoint.vhd
new file mode 100644
index 0000000..ecbdecc
--- /dev/null
+++ b/psl_test_endpoint/psl_test_endpoint.vhd
@@ -0,0 +1,70 @@
+library ieee;
+use ieee.std_logic_1164.all;
+use ieee.numeric_std.all;
+
+library std;
+use std.env.all;
+
+
+entity psl_test_endpoint is
+end entity psl_test_endpoint;
+
+
+architecture test of psl_test_endpoint is
+
+
+  signal s_rst_n : std_logic := '0';
+  signal s_clk   : std_logic := '0';
+  signal s_write : std_logic;
+  signal s_read  : std_logic;
+
+
+begin
+
+
+  s_rst_n <= '1' after 100 ns;
+  s_clk   <= not s_clk after 10 ns;
+
+
+  TestP : process is
+  begin
+    report "RUNNING psl_test_endpoint test case";
+    report "==========================================";
+    s_write <= '0';  -- named assertion should hit
+    s_read  <= '0';
+    wait until s_rst_n = '1' and rising_edge(s_clk);
+    s_write <= '1';
+    wait until rising_edge(s_clk);
+    s_read  <= '1';  -- assertion should hit
+    wait until rising_edge(s_clk);
+    s_write <= '0';
+    s_read  <= '0';
+    wait until rising_edge(s_clk);
+    --stop(0);
+    wait;
+  end process TestP;
+
+
+  -- psl default clock is rising_edge(s_clk);
+  -- psl endpoint E_TEST0 is {not(s_write); s_write};
+  -- psl endpoint E_TEST1 is {s_write; s_write and not(s_read)};
+  -- psl sequence abc_seq is {not(s_write); s_write};
+
+  -- ASSERT0 should be passed, but not failed
+  -- ASSERT1 should be failed
+  -- ASSERT2 should not be passed
+
+  -- psl ASSERT0 : assert always {E_TEST0} |=> {s_read} report  "ASSERT0";
+  -- psl ASSERT1 : assert always {E_TEST0} |-> {s_read} report  "ASSERT1";
+  -- psl ASSERT2 : assert always {E_TEST1} |-> {s_read} report  "ASSERT2";
+
+  -- COVERAGE0..COVERAGE2 should all hit @ same time
+  -- COVERAGE3 should never hit
+
+  -- psl COVERAGE0 : cover {not(s_write); s_write} report "COVERED0";
+  -- psl COVERAGE1 : cover {abc_seq} report "COVERED1";
+  -- psl COVERAGE2 : cover {E_TEST0} report "COVERED2";
+  -- psl COVERAGE3 : cover {E_TEST1} report "COVERED3";
+
+
+end architecture test;