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_performance_log.py

@@ -0,0 +1,52 @@
+"""Tests for the machine-readable benchmark log parser."""
+
+from __future__ import annotations
+
+from scripts.parse_performance_log import parse_log
+
+
+def test_parse_log_requires_terminal_marker_and_complete_samples() -> None:
+    report = parse_log(
+        "PERF region=sdram op=read words=1024 checksum=0x1234 mgmt_wait=10 "
+        "native_wait=9 sdram_wait=8 psram_wait=0 flash_wait=0 dma_wait=0\n"
+        "PERF_BENCHMARK_PASS\n"
+    )
+
+    assert report["status"] == "passed"
+    assert report["failure_marker"] is False
+    assert report["pass_marker"] is True
+    assert report["samples"] == [
+        {
+            "checksum": 0x1234,
+            "dma_wait": 0,
+            "flash_wait": 0,
+            "mgmt_wait": 10,
+            "native_wait": 9,
+            "operation": "read",
+            "psram_wait": 0,
+            "region": "sdram",
+            "sdram_wait": 8,
+            "words": 1024,
+        }
+    ]
+
+
+def test_parse_log_rejects_missing_benchmark_marker() -> None:
+    report = parse_log(
+        "PERF region=flash op=read words=1024 checksum=0 mgmt_wait=1 native_wait=1 "
+        "sdram_wait=0 psram_wait=0 flash_wait=1 dma_wait=0\n"
+    )
+
+    assert report["status"] == "failed"
+
+
+def test_parse_log_rejects_report_with_performance_failure() -> None:
+    report = parse_log(
+        "PERF region=sdram op=read words=1024 checksum=0x1234 mgmt_wait=10 "
+        "native_wait=9 sdram_wait=8 psram_wait=0 flash_wait=0 dma_wait=0\n"
+        "PERF_FAIL region=sdram op=read reason=data expected=1234 actual=0\n"
+        "PERF_BENCHMARK_PASS\n"
+    )
+
+    assert report["status"] == "failed"
+    assert report["failure_marker"] is True