Add x86_64 kernel bring-up with build-selected platform adapters

toolchain/check_arch_boundaries.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+# Copyright 2026 Aaron Hance
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+# http://www.apache.org/licenses/LICENSE-2.0
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Prevent shared Pascal units from selecting architecture implementations."""
+from pathlib import Path
+import re
+import sys
+
+cpu_directive = re.compile(r"\{\$\s*if(?:def|ndef)?\b[^}]*\bCPU\w*", re.I)
+arch_import = re.compile(r"\barch\.(?:x86|x86_64)\.", re.I)
+errors = []
+for path in sorted(Path("src").rglob("*")):
+    if path.suffix not in (".pas", ".inc"):
+        continue
+    if path.parts[1] == "arch" and path.parts[2] != "common":
+        continue
+    source = path.read_text(encoding="utf-8")
+    # Ignore prose comments but retain compiler directives.
+    source = re.sub(r"\{(?!\$).*?\}|\(\*.*?\*\)|//[^\n]*", "", source, flags=re.S)
+    if cpu_directive.search(source):
+        errors.append(f"{path}: CPU conditional belongs in build selection")
+    # Existing i386-only services outside the port still import their drivers.
+    # The migrated units must depend on stable platform names instead.
+    migrated = path.as_posix() in {
+        "src/core/core.util.pas", "src/core/strings/core.strings.pas",
+        "src/io/io.stdio.pas", "src/proc/proc.mgr.pas",
+        "src/memory/memory.heap.pas", "src/memory/memory.raw.pas",
+    } or path.parts[1:3] == ("arch", "common")
+    if migrated and arch_import.search(source):
+        errors.append(f"{path}: shared unit imports an architecture implementation")
+if errors:
+    print("\n".join(errors), file=sys.stderr)
+    sys.exit(1)
+print("Shared architecture boundaries verified.")