Reorganize test dir to ensure test of installed pkg

tests/lib/test_params.py

@@ -0,0 +1,29 @@
+from itertools import product
+
+from .cpuifs.apb3 import APB3, FlatAPB3
+from .cpuifs.axi4lite import AXI4Lite, FlatAXI4Lite
+from .cpuifs.passthrough import Passthrough
+
+
+all_cpuif = [
+    APB3(),
+    FlatAPB3(),
+    AXI4Lite(),
+    FlatAXI4Lite(),
+    Passthrough(),
+]
+
+def get_permutations(spec):
+    param_list = []
+    for v in product(*spec.values()):
+        param_list.append(dict(zip(spec, v)))
+    return param_list
+
+#-------------------------------------------------------------------------------
+# TODO: this wont scale well. Create groups of permutations. not necessary to permute everything all the time.
+TEST_PARAMS = get_permutations({
+    "cpuif": all_cpuif,
+    "retime_read_fanin": [True, False],
+    "retime_read_response": [True, False],
+    "reuse_hwif_typedefs": [True, False],
+})