Add permission validator unit test. Still needs more but basics are here!

diff --git a/TLB/test/test_permission_validator.py b/TLB/test/test_permission_validator.py
new file mode 100644 (file)
index 0000000..6b4d757
--- /dev/null
+++ b/TLB/test/test_permission_validator.py
@@ -0,0 +1,145 @@
+import sys
+sys.path.append("../src")
+sys.path.append("../../TestUtil")
+
+from nmigen.compat.sim import run_simulation
+
+from PermissionValidator import PermissionValidator
+
+from test_helper import assert_op
+
+def set_validator(dut, d, xwr, sm, sa, asid):
+    yield dut.data.eq(d)
+    yield dut.xwr.eq(xwr)
+    yield dut.super_mode.eq(sm)
+    yield dut.super_access.eq(sa)
+    yield dut.asid.eq(asid)
+    yield
+
+def check_valid(dut, v, op):
+    out_v = yield dut.valid
+    assert_op("Valid", out_v, v, op)
+
+def testbench(dut):
+    # 80 bits represented. Ignore the MSB as it will be truncated
+    # ASID is bits first 4 hex values (bits 64 - 78)
+
+    # Test user mode entry valid
+    # Global Bit matching ASID
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000031
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 0
+    super_access = 0
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0) 
+
+    # Test user mode entry valid
+    # Global Bit nonmatching ASID
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000031
+    # Ignore MSB it will be truncated
+    asid = 0x7FF6
+    super_mode = 0
+    super_access = 0
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test user mode entry invalid
+    # Global Bit nonmatching ASID
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000021
+    # Ignore MSB it will be truncated
+    asid = 0x7FF6  
+    super_mode = 0
+    super_access = 0
+    xwr = 0
+    valid = 0
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)     
+    
+    # Test user mode entry valid
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000011
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 0
+    super_access = 0
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test user mode entry invalid
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000011
+    # Ignore MSB it will be truncated
+    asid = 0x7FF6
+    super_mode = 0
+    super_access = 0
+    xwr = 0
+    valid = 0
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test supervisor mode entry valid
+    # The entry is NOT in user mode
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000001
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 1
+    super_access = 0
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test supervisor mode entry invalid
+    # The entry is in user mode
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000011
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 1
+    super_access = 0
+    xwr = 0
+    valid = 0
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test supervisor mode entry valid
+    # The entry is NOT in user mode with access
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000001
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 1
+    super_access = 1
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+    # Test supervisor mode entry valid
+    # The entry is in user mode with access
+    # Ensure that user mode and valid is enabled!
+    data = 0x7FFF0000000000000011
+    # Ignore MSB it will be truncated
+    asid = 0x7FFF
+    super_mode = 1
+    super_access = 1
+    xwr = 0
+    valid = 1
+    yield from set_validator(dut, data, xwr, super_mode, super_access, asid)
+    yield from check_valid(dut, valid, 0)
+
+if __name__ == "__main__":
+    dut = PermissionValidator(64 + 15);
+    run_simulation(dut, testbench(dut), vcd_name="Waveforms/test_permission_validator.vcd")
+    print("PermissionValidator Unit Test Success")