feat: implement XPI output-enable isolation test and add related testbench

tests/test_xpi_io.py

@@ -0,0 +1,78 @@
+"""RTL regression for XPI output-enable isolation during input phases."""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_xpi_releases_data_pads_while_receiving(tmp_path: Path) -> None:
+    iverilog = shutil.which("iverilog")
+    vvp = shutil.which("vvp")
+    if iverilog is None or vvp is None:
+        return
+
+    generated = tmp_path / "generated"
+    subprocess.run(
+        [
+            sys.executable,
+            str(ROOT / "rtl/mini/address_map/generate_memory_map.py"),
+            "--map",
+            str(ROOT / "rtl/mini/address_map/memory_map.json"),
+            "--output-dir",
+            str(generated),
+        ],
+        check=True,
+    )
+    source_list = tmp_path / "xpi_io.fl"
+    source_list.write_text(
+        "\n".join(
+            [
+                "+define+SV_ASSRT_DISABLE",
+                f"+incdir+{generated / 'rtl'}",
+                f"+incdir+{ROOT / 'rtl/ip/rib/storage'}",
+                f"+incdir+{ROOT / 'rtl/managed/clusterip/common/rtl'}",
+                str(ROOT / "rtl/managed/clusterip/common/rtl/interface/rib_if.sv"),
+                str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
+                str(ROOT / "rtl/ip/rib/storage/xpi.sv"),
+                str(ROOT / "rtl/ip/rib/storage/xpi_clkgen.sv"),
+                str(ROOT / "rtl/ip/rib/storage/xpi_core.sv"),
+                str(ROOT / "tests/rtl/xpi_io_tb.sv"),
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+    converted = tmp_path / "xpi_io_tb.v"
+    subprocess.run(
+        [
+            sys.executable,
+            str(ROOT / "rtl/mini/script/convt_sv2v.py"),
+            "-f",
+            str(source_list),
+            "--output",
+            str(converted),
+        ],
+        check=True,
+    )
+    simulation = tmp_path / "xpi_io_tb"
+    subprocess.run(
+        [
+            iverilog,
+            "-g2012",
+            "-s",
+            "xpi_io_tb",
+            "-o",
+            str(simulation),
+            str(converted),
+        ],
+        check=True,
+    )
+    result = subprocess.run([vvp, str(simulation)], text=True, capture_output=True, check=True)
+
+    assert "XPI pad drive isolation test passed" in result.stdout