Split up common into kernel,place,route

Signed-off-by: gatecat <gatecat@ds0.me>

common/kernel/embed.h

@@ -0,0 +1,49 @@
+/*
+ *  nextpnr -- Next Generation Place and Route
+ *
+ *  Copyright (C) 2020  whitequark <whitequark@whitequark.org>
+ *
+ *  Permission to use, copy, modify, and/or distribute this software for any
+ *  purpose with or without fee is hereby granted, provided that the above
+ *  copyright notice and this permission notice appear in all copies.
+ *
+ *  THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ *  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ *  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ *  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ *  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ *  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+
+#ifndef EMBED_H
+#define EMBED_H
+
+#include "nextpnr.h"
+NEXTPNR_NAMESPACE_BEGIN
+
+#if !defined(EXTERNAL_CHIPDB_ROOT) && !defined(WIN32)
+
+struct EmbeddedFile
+{
+    static EmbeddedFile *head;
+
+    std::string filename;
+    const void *content;
+    EmbeddedFile *next = nullptr;
+
+    EmbeddedFile(const std::string &filename, const void *content) : filename(filename), content(content)
+    {
+        next = head;
+        head = this;
+    }
+};
+
+#endif
+
+const void *get_chipdb(const std::string &filename);
+
+NEXTPNR_NAMESPACE_END
+
+#endif // EMBED_H