Adding unit test for CAM

diff --git a/TLB/test/test_cam.py b/TLB/test/test_cam.py
new file mode 100644 (file)
index 0000000..f48e6e6
--- /dev/null
+++ b/TLB/test/test_cam.py
@@ -0,0 +1,57 @@
+from nmigen.compat.sim import run_simulation
+
+from test_helper import check
+from Cam import Cam
+
+def set_cam(dut, c, a, k, d):
+    yield dut.command.eq(c)
+    yield dut.address.eq(a)
+    yield dut.key_in.eq(k)
+    yield dut.data_in.eq(d)
+    yield
+    
+def check_data_hit(dut, data_hit, op):
+    out_dh = yield dut.data_hit
+    yield from check("Data Hit", out_dh, data_hit, op)
+    
+def check_data(dut, data, op):
+    out_d = yield dut.data
+    yield from check("Data", out_d, data, op)  
+    
+def check_all(dut, data_hit, data, dh_op, d_op):
+    yield from check_data_hit(dut, data_hit, dh_op)
+    yield from check_data(dut, data, d_op)
+    
+
+def testbench(dut):
+    # NA
+    command = 0
+    address = 0
+    key = 0
+    data = 0
+    data_hit = 0
+    yield from set_cam(dut, command, address, key, data)
+    yield from check_data_hit(dut, data_hit, 0)
+    
+    # Search
+    command = 3
+    address = 0
+    key = 0
+    data = 0
+    data_hit = 0
+    yield from set_cam(dut, command, address, key, data)
+    yield from check_data_hit(dut, data_hit, 0)    
+    
+    # Write Entry 0
+    command = 1
+    address = 0
+    key = 5
+    data = 4
+    data_hit = 1
+    yield from set_cam(dut, command, address, key, data)
+    yield from check_data_hit(dut, data_hit, 0)     
+
+if __name__ == "__main__":
+    dut = Cam(4, 4, 4)
+    run_simulation(dut, testbench(dut), vcd_name="Waveforms/cam_test.vcd")
+    print("Cam Unit Test Success")
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