add license and copyright header to dcache.py,

extracted authors from git history for the file, but made sure to
credit the original dcache.vhdl as being from microwatt and its
license being CC4

diff --git a/src/soc/experiment/dcache.py b/src/soc/experiment/dcache.py
index 4cd1c0abdac53e920a011eb02c866b13c4d95c5c..0d021e0daecb4856622aa5d8051c91d8f20ecf5d 100644 (file)
--- a/src/soc/experiment/dcache.py
+++ b/src/soc/experiment/dcache.py
@@ -1,3 +1,17 @@
+#!/usr/bin/env python3
+#
+# Copyright (C) 2020,2021 Luke Kenneth Casson Leighton <lkcl@lkcl.net>
+# Copyright (C) 2020 Cole Poirier
+# Copyright (C) 2020,2021 Cesar Strauss
+# Copyright (C) 2021 Tobias Platen
+#
+# Original dcache.vhdl Copyright of its authors and licensed
+# by IBM under CC-BY 4.0
+# https://github.com/antonblanchard/microwatt
+#
+# Conversion to nmigen funded by NLnet and NGI POINTER under EU Grants
+# 871528 and 957073, under the LGPL-v3+ License
+
 """DCache
 
 based on Anton Blanchard microwatt dcache.vhdl