Initial commit: Loongson FPGA SoC project for 2026 CIC-IEC

fpga/check_dsp.py

@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+import os
+import re
+import sys
+from pathlib import Path
+from typing import List
+
+
+def usage() -> None:
+    print("Usage: python3 check_dsp.py <dsp-utilization-report> [max-dsp]", file=sys.stderr)
+
+
+def extract_dsp_used(report: Path) -> int:
+    if not report.is_file():
+        raise FileNotFoundError(f"DSP utilization report not found: {report}")
+
+    used_values = []
+    for line in report.read_text(errors="replace").splitlines():
+        stripped = line.strip()
+        if not stripped.startswith("|") or "DSP" not in stripped.upper():
+            continue
+
+        columns = [col.strip() for col in stripped.strip("|").split("|")]
+        if len(columns) < 2:
+            continue
+        if not re.fullmatch(r"DSPs?", columns[0], re.IGNORECASE):
+            continue
+
+        match = re.fullmatch(r"\d+", columns[1])
+        if match:
+            used_values.append(int(match.group(0)))
+
+    if not used_values:
+        raise ValueError(f"No DSP utilization row found in {report}")
+
+    return max(used_values)
+
+
+def main(argv: List[str]) -> int:
+    if len(argv) not in (2, 3):
+        usage()
+        return 2
+
+    report = Path(argv[1])
+    max_allowed = int(argv[2]) if len(argv) == 3 else int(os.environ.get("DSP_MAX", "0"))
+    used = extract_dsp_used(report)
+    print(f"DSP used: {used}, allowed: {max_allowed}")
+    if used > max_allowed:
+        print(f"ERROR: DSP usage {used} exceeds allowed limit {max_allowed}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    try:
+        sys.exit(main(sys.argv))
+    except Exception as exc:
+        print(f"ERROR: {exc}", file=sys.stderr)
+        sys.exit(1)