feat: add formal properties for sysctrl and update related files

- Introduced  to define formal properties for the sysctrl module.
- Updated  to include new formal properties and source files.
- Renamed  to  in the bus module and created a new  file.
- Implemented a testbench for  in .
- Removed the obsolete  test file.
- Updated test scripts to reference the new  instead of the old RAM module.
- Adjusted various test files to ensure compatibility with the new structure and naming conventions.

tests/test_rib.py

@@ -48,7 +48,7 @@ def test_bus_preserves_incr4_and_rejects_illegal_bursts(tmp_path: Path) -> None:
                 str(ROOT / "rtl/mini/top/soc_ribl2rib.sv"),
                 str(ROOT / "rtl/mini/top/soc_rib2ribp.sv"),
                 str(ROOT / "rtl/mini/top/soc_rib_error_slave.sv"),
-                str(ROOT / "rtl/mini/top/soc_rib_ram.sv"),
+                str(ROOT / "rtl/mini/top/soc_rib2ram.sv"),
                 str(ROOT / "rtl/mini/top/bus.sv"),
                 str(ROOT / "tests/rtl/rib_bus_tb.sv"),
                 "",
@@ -77,37 +77,13 @@ def test_bus_preserves_incr4_and_rejects_illegal_bursts(tmp_path: Path) -> None:
     assert "RIB burst arbitration and protocol test passed" in result.stdout
 
 
-def test_common_spill_register_preserves_ready_valid_data(tmp_path: Path) -> None:
-    iverilog = shutil.which("iverilog")
-    vvp = shutil.which("vvp")
-    if iverilog is None or vvp is None:
-        return
-
-    simulation = tmp_path / "spill_register_tb"
-    subprocess.run(
-        [
-            iverilog,
-            "-g2012",
-            "-s",
-            "spill_register_tb",
-            "-o",
-            str(simulation),
-            str(ROOT / "rtl/managed/clusterip/common/rtl/utils/spill_register.sv"),
-            str(ROOT / "tests/rtl/spill_register_tb.sv"),
-        ],
-        check=True,
-    )
-    result = subprocess.run([vvp, str(simulation)], text=True, capture_output=True, check=True)
-    assert "spill register ready/valid test passed" in result.stdout
-
-
 def test_burst_sram_preserves_data_and_backpressure(tmp_path: Path) -> None:
     iverilog = shutil.which("iverilog")
     vvp = shutil.which("vvp")
     if iverilog is None or vvp is None:
         return
 
-    source_list = tmp_path / "soc_rib_ram.fl"
+    source_list = tmp_path / "soc_rib2ram.fl"
     source_list.write_text(
         "\n".join(
             [
@@ -118,14 +94,14 @@ def test_burst_sram_preserves_data_and_backpressure(tmp_path: Path) -> None:
                 str(ROOT / "rtl/mini/top/soc_rib_if.sv"),
                 str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
                 str(ROOT / "rtl/managed/clusterip/common/rtl/utils/spill_register.sv"),
-                str(ROOT / "rtl/mini/top/soc_rib_ram.sv"),
-                str(ROOT / "tests/rtl/soc_rib_ram_tb.sv"),
+                str(ROOT / "rtl/mini/top/soc_rib2ram.sv"),
+                str(ROOT / "tests/rtl/soc_rib2ram_tb.sv"),
                 "",
             ]
         ),
         encoding="utf-8",
     )
-    converted = tmp_path / "soc_rib_ram_tb.v"
+    converted = tmp_path / "soc_rib2ram_tb.v"
     subprocess.run(
         [
             sys.executable,
@@ -137,9 +113,9 @@ def test_burst_sram_preserves_data_and_backpressure(tmp_path: Path) -> None:
         ],
         check=True,
     )
-    simulation = tmp_path / "soc_rib_ram_tb"
+    simulation = tmp_path / "soc_rib2ram_tb"
     subprocess.run(
-        [iverilog, "-g2012", "-s", "soc_rib_ram_tb", "-o", str(simulation), str(converted)],
+        [iverilog, "-g2012", "-s", "soc_rib2ram_tb", "-o", str(simulation), str(converted)],
         check=True,
     )
     result = subprocess.run([vvp, str(simulation)], text=True, capture_output=True, check=True)