feat: refactor NMI interface and enhance performance logging

- Updated NMI interface references from  to  in multiple files for consistency.
- Added a new script  to convert UART performance records into structured JSON format.
- Enhanced the README documentation to include details about the new performance log parser.
- Implemented tests for the new performance log parser to ensure correct functionality.
- Added new test cases for DMA error handling and SDRAM data integrity to improve coverage.
- Updated existing test cases to accommodate changes in the NMI interface and added performance metrics.
- Refactored bus fault testbench to include fault code checks and improved error handling.
- Adjusted memory map generation and pin mapping tests to reflect recent changes in RTL structure.

tests/test_dma.py

@@ -0,0 +1,56 @@
+"""DMA protocol regression tests."""
+
+from __future__ import annotations
+
+import shutil
+import subprocess
+import sys
+from pathlib import Path
+
+
+ROOT = Path(__file__).resolve().parents[1]
+
+
+def test_dma_reports_bus_errors_and_transfers_exact_word_count(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 / "dma_error.fl"
+    source_list.write_text(
+        "\n".join(
+            [
+                "+define+SV_ASSRT_DISABLE",
+                f"+incdir+{ROOT / 'rtl/managed/clusterip/common/rtl'}",
+                f"+incdir+{ROOT / 'rtl/mini/top'}",
+                str(ROOT / "rtl/managed/clusterip/common/rtl/interface/nmi_if.sv"),
+                str(ROOT / "rtl/mini/top/soc_nmi_if.sv"),
+                str(ROOT / "rtl/managed/clusterip/common/rtl/utils/register.sv"),
+                str(ROOT / "rtl/ip/native/peripheral/dma.sv"),
+                str(ROOT / "rtl/ip/native/peripheral/dma_core.sv"),
+                str(ROOT / "tests/rtl/dma_error_tb.sv"),
+                "",
+            ]
+        ),
+        encoding="utf-8",
+    )
+    converted = tmp_path / "dma_error_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 / "dma_error_tb"
+    subprocess.run(
+        [iverilog, "-g2012", "-s", "dma_error_tb", "-o", str(simulation), str(converted)],
+        check=True,
+    )
+    result = subprocess.run([vvp, str(simulation)], text=True, capture_output=True, check=True)
+    assert "dma error responder test passed" in result.stdout