Update readme, clarify licensing

README.md

@@ -242,7 +242,6 @@ python3 fuzz.py --espresso_file ../decoder --riscvtests_dir ../../../sim --riscv
 > [!TIP]
 > This work will be presented at the Computing Frontiers 2024 conference. A research paper containing our design objectives, an insight into the design and trade-offs, a comparison with similar cores, and an in-depth evaluation will be **available soon**.
 
-
 ## TODOs <a name="todos"></a>
 
 - [ ] Workflow: caching, tool versions, artifacts, dependence on some local tools
@@ -256,3 +255,7 @@ python3 fuzz.py --espresso_file ../decoder --riscvtests_dir ../../../sim --riscv
 - [ ] More documentation
 
 Please feel free to discuss and open an issue and/or pull request.
+
+## Licensing
+
+The core in the folder `rtl` is licensed under the MIT license. This license may _not_ apply to the remainder of the repository.

rtl/LICENSE.txt

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2023-2024 Meinhard Kissich
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.