[ot] python/qemu: ot.top: add a new module to manage OT tops.

For now, only enumerate supported top names.

Signed-off-by: Emmanuel Blot <[email protected]>

Author: rivos-eblot

python/qemu/ot/top/__init__.py

@@ -0,0 +1,27 @@
+# Copyright (c) 2025 2025 lowRISC contributors.
+# SPDX-License-Identifier: Apache2
+
+"""OpenTitan Tops."""
+
+from ot.util.misc import classproperty
+from typing import Optional
+
+
+class OpenTitanTop:
+    """OpenTitan supported tops."""
+
+    SHORT_MAP = {
+        'darjeeling': 'dj',
+        'earlgrey': 'eg',
+    }
+
+    @classproperty
+    def names(cls) -> list[str]:
+        """Supported top names."""
+        # pylint: disable=no-self-argument
+        return list(cls.SHORT_MAP)
+
+    @classmethod
+    def short_name(cls, topname: str) -> Optional[str]:
+        """Get the short form of a top."""
+        return cls.SHORT_MAP.get(topname.lower())