diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 0000000..593455a
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,28 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution;
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code Reviews
+
+All submissions, including submissions by project members, require review. We
+use Gerrit code review for this purpose. Consult
+[Gerrit User Guide](https://gerrit-documentation.storage.googleapis.com/Documentation/3.8.2/intro-user.html)
+for more information.
+
+## Community Guidelines
+
+This project follows
+[Google's Open Source Community Guidelines](https://opensource.google/conduct/).
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..7a4a3ea
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,202 @@
+
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
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+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+
+   4. Redistribution. You may reproduce and distribute copies of the
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+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
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+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
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+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
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+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   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.
\ No newline at end of file
diff --git a/external/BUILD b/external/BUILD
index e69de29..1dc90d1 100644
--- a/external/BUILD
+++ b/external/BUILD
@@ -0,0 +1,13 @@
+# Copyright 2023 Google LLC
+#
+# 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.
diff --git a/hdl/chisel/src/kelvin/vector/VAlu.scala b/hdl/chisel/src/kelvin/vector/VAlu.scala
index b074a13..2264823 100644
--- a/hdl/chisel/src/kelvin/vector/VAlu.scala
+++ b/hdl/chisel/src/kelvin/vector/VAlu.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VAluInt.scala b/hdl/chisel/src/kelvin/vector/VAluInt.scala
index 3f81781..90f648b 100644
--- a/hdl/chisel/src/kelvin/vector/VAluInt.scala
+++ b/hdl/chisel/src/kelvin/vector/VAluInt.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VCmdq.scala b/hdl/chisel/src/kelvin/vector/VCmdq.scala
index 41845ad..5ed357f 100644
--- a/hdl/chisel/src/kelvin/vector/VCmdq.scala
+++ b/hdl/chisel/src/kelvin/vector/VCmdq.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VCommon.scala b/hdl/chisel/src/kelvin/vector/VCommon.scala
index 5db855e..76edbd5 100644
--- a/hdl/chisel/src/kelvin/vector/VCommon.scala
+++ b/hdl/chisel/src/kelvin/vector/VCommon.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VConvAlu.scala b/hdl/chisel/src/kelvin/vector/VConvAlu.scala
index c469161..c0829fb 100644
--- a/hdl/chisel/src/kelvin/vector/VConvAlu.scala
+++ b/hdl/chisel/src/kelvin/vector/VConvAlu.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VConvCtrl.scala b/hdl/chisel/src/kelvin/vector/VConvCtrl.scala
index 78fa0a4..2cfc273 100644
--- a/hdl/chisel/src/kelvin/vector/VConvCtrl.scala
+++ b/hdl/chisel/src/kelvin/vector/VConvCtrl.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VCore.scala b/hdl/chisel/src/kelvin/vector/VCore.scala
index 0ce01f4..7e4cb00 100644
--- a/hdl/chisel/src/kelvin/vector/VCore.scala
+++ b/hdl/chisel/src/kelvin/vector/VCore.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VDecode.scala b/hdl/chisel/src/kelvin/vector/VDecode.scala
index 3451adc..cb9f419 100644
--- a/hdl/chisel/src/kelvin/vector/VDecode.scala
+++ b/hdl/chisel/src/kelvin/vector/VDecode.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VDecodeInstruction.scala b/hdl/chisel/src/kelvin/vector/VDecodeInstruction.scala
index 33dc5f2..ad72b54 100644
--- a/hdl/chisel/src/kelvin/vector/VDecodeInstruction.scala
+++ b/hdl/chisel/src/kelvin/vector/VDecodeInstruction.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VDecodeOp.scala b/hdl/chisel/src/kelvin/vector/VDecodeOp.scala
index 553af1b..1bbfa53 100644
--- a/hdl/chisel/src/kelvin/vector/VDecodeOp.scala
+++ b/hdl/chisel/src/kelvin/vector/VDecodeOp.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VDot.scala b/hdl/chisel/src/kelvin/vector/VDot.scala
index 50d978e..befeaec 100644
--- a/hdl/chisel/src/kelvin/vector/VDot.scala
+++ b/hdl/chisel/src/kelvin/vector/VDot.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VEncodeOp.scala b/hdl/chisel/src/kelvin/vector/VEncodeOp.scala
index 754dd69..5e4b776 100644
--- a/hdl/chisel/src/kelvin/vector/VEncodeOp.scala
+++ b/hdl/chisel/src/kelvin/vector/VEncodeOp.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VInst.scala b/hdl/chisel/src/kelvin/vector/VInst.scala
index 26efbfc..8a1b42e 100644
--- a/hdl/chisel/src/kelvin/vector/VInst.scala
+++ b/hdl/chisel/src/kelvin/vector/VInst.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VLd.scala b/hdl/chisel/src/kelvin/vector/VLd.scala
index 85a342e..fda657f 100644
--- a/hdl/chisel/src/kelvin/vector/VLd.scala
+++ b/hdl/chisel/src/kelvin/vector/VLd.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VLdSt.scala b/hdl/chisel/src/kelvin/vector/VLdSt.scala
index 256ecd8..0f32148 100644
--- a/hdl/chisel/src/kelvin/vector/VLdSt.scala
+++ b/hdl/chisel/src/kelvin/vector/VLdSt.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VRegfile.scala b/hdl/chisel/src/kelvin/vector/VRegfile.scala
index 8f3b1a4..db7396d 100644
--- a/hdl/chisel/src/kelvin/vector/VRegfile.scala
+++ b/hdl/chisel/src/kelvin/vector/VRegfile.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VRegfileSegment.scala b/hdl/chisel/src/kelvin/vector/VRegfileSegment.scala
index 5290d45..e4e17b2 100644
--- a/hdl/chisel/src/kelvin/vector/VRegfileSegment.scala
+++ b/hdl/chisel/src/kelvin/vector/VRegfileSegment.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/chisel/src/kelvin/vector/VSt.scala b/hdl/chisel/src/kelvin/vector/VSt.scala
index d9892c7..91b5565 100644
--- a/hdl/chisel/src/kelvin/vector/VSt.scala
+++ b/hdl/chisel/src/kelvin/vector/VSt.scala
@@ -1,3 +1,19 @@
+/*
+ * Copyright 2023 Google LLC
+ *
+ * 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.
+ */
+
 package kelvin
 
 import chisel3._
diff --git a/hdl/verilog/BUILD b/hdl/verilog/BUILD
index 85ee4f8..a1df259 100644
--- a/hdl/verilog/BUILD
+++ b/hdl/verilog/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 load("@rules_hdl//verilog:providers.bzl", "VerilogInfo", "verilog_library")
 
 verilog_library(
diff --git a/hdl/verilog/ClockGate.v b/hdl/verilog/ClockGate.v
index e170ae7..3993c52 100644
--- a/hdl/verilog/ClockGate.v
+++ b/hdl/verilog/ClockGate.v
@@ -1,3 +1,17 @@
+// Copyright 2023 Google LLC
+//
+// 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.
+
 module ClockGate(
   input         clk_i,
   input         enable,  // '1' passthrough, '0' disable.
diff --git a/hdl/verilog/Sram_1rw_256x256.v b/hdl/verilog/Sram_1rw_256x256.v
index e3603de..d0a0b9a 100644
--- a/hdl/verilog/Sram_1rw_256x256.v
+++ b/hdl/verilog/Sram_1rw_256x256.v
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 module Sram_1rw_256x256(
   input          clock,
diff --git a/hdl/verilog/Sram_1rwm_256x288.v b/hdl/verilog/Sram_1rwm_256x288.v
index 425b662..7750f9d 100644
--- a/hdl/verilog/Sram_1rwm_256x288.v
+++ b/hdl/verilog/Sram_1rwm_256x288.v
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 module Sram_1rwm_256x288(
   input          clock,
diff --git a/lib/BUILD b/lib/BUILD
index 7c0b795..90059a6 100644
--- a/lib/BUILD
+++ b/lib/BUILD
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 load("@io_bazel_rules_scala//scala:scala.bzl", "scala_library")
 
 scala_library(
diff --git a/rules/BUILD b/rules/BUILD
index ffd0fb0..a603184 100644
--- a/rules/BUILD
+++ b/rules/BUILD
@@ -1 +1,15 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 package(default_visibility = ["//visibility:public"])
diff --git a/rules/chisel.bzl b/rules/chisel.bzl
index d097498..c31f0cf 100644
--- a/rules/chisel.bzl
+++ b/rules/chisel.bzl
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 load("@io_bazel_rules_scala//scala:scala.bzl", "scala_binary", "scala_library")
 load("@rules_hdl//verilog:providers.bzl", "VerilogInfo", "verilog_library")
 load("@kelvin_hw//rules:verilator.bzl", "verilator_cc_library")
diff --git a/rules/deps.bzl b/rules/deps.bzl
index e26ce4d..e4e5404 100644
--- a/rules/deps.bzl
+++ b/rules/deps.bzl
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load(
     "@io_bazel_rules_scala//scala:scala_maven_import_external.bzl",
diff --git a/rules/repos.bzl b/rules/repos.bzl
index e22179c..a7bec48 100644
--- a/rules/repos.bzl
+++ b/rules/repos.bzl
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 # Kelvin repositories
 #
 
diff --git a/rules/verilator.bzl b/rules/verilator.bzl
index 6f1b72e..c00bad3 100644
--- a/rules/verilator.bzl
+++ b/rules/verilator.bzl
@@ -1,3 +1,17 @@
+# Copyright 2023 Google LLC
+#
+# 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.
+
 # Modified from bazel_rules_hdl to use SystemC
 """Functions for verilator."""
 
diff --git a/tests/verilator_sim/fifo.h b/tests/verilator_sim/fifo.h
index 2e00709..e12d809 100644
--- a/tests/verilator_sim/fifo.h
+++ b/tests/verilator_sim/fifo.h
@@ -1,4 +1,17 @@
 // Copyright 2023 Google LLC
+//
+// 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.
+
 #ifndef TESTS_VERILATOR_SIM_FIFO_H_
 #define TESTS_VERILATOR_SIM_FIFO_H_
 
diff --git a/tests/verilator_sim/kelvin/alu_ref.h b/tests/verilator_sim/kelvin/alu_ref.h
index 6ab9372..bf61daf 100644
--- a/tests/verilator_sim/kelvin/alu_ref.h
+++ b/tests/verilator_sim/kelvin/alu_ref.h
@@ -1,5 +1,17 @@
 // Copyright 2023 Google LLC
 //
+// 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.
+//
 // Reference alu ops implementation
 #ifndef TESTS_VERILATOR_SIM_KELVIN_ALU_REF_H_
 #define TESTS_VERILATOR_SIM_KELVIN_ALU_REF_H_
diff --git a/tests/verilator_sim/kelvin/core_if.h b/tests/verilator_sim/kelvin/core_if.h
index 7ecbf4a..9c26d5b 100644
--- a/tests/verilator_sim/kelvin/core_if.h
+++ b/tests/verilator_sim/kelvin/core_if.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_CORE_IF_H_
 #define TESTS_VERILATOR_SIM_KELVIN_CORE_IF_H_
diff --git a/tests/verilator_sim/kelvin/core_tb.cc b/tests/verilator_sim/kelvin/core_tb.cc
index f23c1f7..9836dc6 100644
--- a/tests/verilator_sim/kelvin/core_tb.cc
+++ b/tests/verilator_sim/kelvin/core_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VCore.h"  // Generated
 #include "absl/flags/flag.h"
diff --git a/tests/verilator_sim/kelvin/dbus2axi_tb.cc b/tests/verilator_sim/kelvin/dbus2axi_tb.cc
index 91f1da7..55f14ae 100644
--- a/tests/verilator_sim/kelvin/dbus2axi_tb.cc
+++ b/tests/verilator_sim/kelvin/dbus2axi_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VDBus2Axi.h"
 #include "tests/verilator_sim/sysc_tb.h"
diff --git a/tests/verilator_sim/kelvin/debug_if.h b/tests/verilator_sim/kelvin/debug_if.h
index 370501d..d2d6ac9 100644
--- a/tests/verilator_sim/kelvin/debug_if.h
+++ b/tests/verilator_sim/kelvin/debug_if.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_DEBUG_IF_H_
 #define TESTS_VERILATOR_SIM_KELVIN_DEBUG_IF_H_
diff --git a/tests/verilator_sim/kelvin/kelvin_cfg.h b/tests/verilator_sim/kelvin/kelvin_cfg.h
index 424a507..8fb5ac4 100644
--- a/tests/verilator_sim/kelvin/kelvin_cfg.h
+++ b/tests/verilator_sim/kelvin/kelvin_cfg.h
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_KELVIN_CFG_H_
 #define TESTS_VERILATOR_SIM_KELVIN_KELVIN_CFG_H_
diff --git a/tests/verilator_sim/kelvin/l1dcache_tb.cc b/tests/verilator_sim/kelvin/l1dcache_tb.cc
index 88ffec4..cb901d1 100644
--- a/tests/verilator_sim/kelvin/l1dcache_tb.cc
+++ b/tests/verilator_sim/kelvin/l1dcache_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "tests/verilator_sim/sysc_tb.h"
 
diff --git a/tests/verilator_sim/kelvin/l1icache_tb.cc b/tests/verilator_sim/kelvin/l1icache_tb.cc
index 3f05e7f..b77beb1 100644
--- a/tests/verilator_sim/kelvin/l1icache_tb.cc
+++ b/tests/verilator_sim/kelvin/l1icache_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "tests/verilator_sim/sysc_tb.h"
 
diff --git a/tests/verilator_sim/kelvin/memory_if.h b/tests/verilator_sim/kelvin/memory_if.h
index 733bd33..1366221 100644
--- a/tests/verilator_sim/kelvin/memory_if.h
+++ b/tests/verilator_sim/kelvin/memory_if.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_MEMORY_IF_H_
 #define TESTS_VERILATOR_SIM_KELVIN_MEMORY_IF_H_
diff --git a/tests/verilator_sim/kelvin/valu.h b/tests/verilator_sim/kelvin/valu.h
index 0719491..7df24d1 100644
--- a/tests/verilator_sim/kelvin/valu.h
+++ b/tests/verilator_sim/kelvin/valu.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_VALU_H_
 #define TESTS_VERILATOR_SIM_KELVIN_VALU_H_
diff --git a/tests/verilator_sim/kelvin/valu_tb.cc b/tests/verilator_sim/kelvin/valu_tb.cc
index 5d05ade..0a4d25e 100644
--- a/tests/verilator_sim/kelvin/valu_tb.cc
+++ b/tests/verilator_sim/kelvin/valu_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVAlu.h"
 #include "tests/verilator_sim/kelvin/valu.h"
diff --git a/tests/verilator_sim/kelvin/valuint_tb.cc b/tests/verilator_sim/kelvin/valuint_tb.cc
index 05999be..3b579b4 100644
--- a/tests/verilator_sim/kelvin/valuint_tb.cc
+++ b/tests/verilator_sim/kelvin/valuint_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVAluInt.h"  // Generated.
 #include "tests/verilator_sim/kelvin/valu.h"
diff --git a/tests/verilator_sim/kelvin/vcmdq_tb.cc b/tests/verilator_sim/kelvin/vcmdq_tb.cc
index 7f1068c..aec9c50 100644
--- a/tests/verilator_sim/kelvin/vcmdq_tb.cc
+++ b/tests/verilator_sim/kelvin/vcmdq_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVCmdq.h"
 #include "tests/verilator_sim/sysc_tb.h"
diff --git a/tests/verilator_sim/kelvin/vconvalu_tb.cc b/tests/verilator_sim/kelvin/vconvalu_tb.cc
index 1a30c4b..6015a6f 100644
--- a/tests/verilator_sim/kelvin/vconvalu_tb.cc
+++ b/tests/verilator_sim/kelvin/vconvalu_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVConvAlu.h"
 #include "tests/verilator_sim/kelvin/kelvin_cfg.h"
diff --git a/tests/verilator_sim/kelvin/vconvctrl_tb.cc b/tests/verilator_sim/kelvin/vconvctrl_tb.cc
index daee93e..47cfd41 100644
--- a/tests/verilator_sim/kelvin/vconvctrl_tb.cc
+++ b/tests/verilator_sim/kelvin/vconvctrl_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVConvCtrl.h"
 #include "tests/verilator_sim/kelvin/kelvin_cfg.h"
diff --git a/tests/verilator_sim/kelvin/vdecode.h b/tests/verilator_sim/kelvin/vdecode.h
index 701b6f7..42a8168 100644
--- a/tests/verilator_sim/kelvin/vdecode.h
+++ b/tests/verilator_sim/kelvin/vdecode.h
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_VDECODE_H_
 #define TESTS_VERILATOR_SIM_KELVIN_VDECODE_H_
diff --git a/tests/verilator_sim/kelvin/vdecode_tb.cc b/tests/verilator_sim/kelvin/vdecode_tb.cc
index 5e364ff..3d5c81d 100644
--- a/tests/verilator_sim/kelvin/vdecode_tb.cc
+++ b/tests/verilator_sim/kelvin/vdecode_tb.cc
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVDecode.h"
 #include "tests/verilator_sim/sysc_tb.h"
diff --git a/tests/verilator_sim/kelvin/vdecodeinstruction_tb.cc b/tests/verilator_sim/kelvin/vdecodeinstruction_tb.cc
index d3986a5..a38393f 100644
--- a/tests/verilator_sim/kelvin/vdecodeinstruction_tb.cc
+++ b/tests/verilator_sim/kelvin/vdecodeinstruction_tb.cc
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVDecodeInstruction.h"
 #include "tests/verilator_sim/sysc_tb.h"
diff --git a/tests/verilator_sim/kelvin/vdecodeop.h b/tests/verilator_sim/kelvin/vdecodeop.h
index 6f5733d..3156e3a 100644
--- a/tests/verilator_sim/kelvin/vdecodeop.h
+++ b/tests/verilator_sim/kelvin/vdecodeop.h
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_VDECODEOP_H_
 #define TESTS_VERILATOR_SIM_KELVIN_VDECODEOP_H_
diff --git a/tests/verilator_sim/kelvin/vencodeop.h b/tests/verilator_sim/kelvin/vencodeop.h
index 636c079..38f9f68 100644
--- a/tests/verilator_sim/kelvin/vencodeop.h
+++ b/tests/verilator_sim/kelvin/vencodeop.h
@@ -1,4 +1,16 @@
-// Copyright 2023 Google LLC.
+// Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_KELVIN_VENCODEOP_H_
 #define TESTS_VERILATOR_SIM_KELVIN_VENCODEOP_H_
diff --git a/tests/verilator_sim/kelvin/vld_tb.cc b/tests/verilator_sim/kelvin/vld_tb.cc
index cfb8db6..8a65da5 100644
--- a/tests/verilator_sim/kelvin/vld_tb.cc
+++ b/tests/verilator_sim/kelvin/vld_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVLd.h"
 
diff --git a/tests/verilator_sim/kelvin/vldst_tb.cc b/tests/verilator_sim/kelvin/vldst_tb.cc
index 28d8fa3..83e1edf 100644
--- a/tests/verilator_sim/kelvin/vldst_tb.cc
+++ b/tests/verilator_sim/kelvin/vldst_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVLdSt.h"
 
diff --git a/tests/verilator_sim/kelvin/vregfile_tb.cc b/tests/verilator_sim/kelvin/vregfile_tb.cc
index b1377d8..cf45955 100644
--- a/tests/verilator_sim/kelvin/vregfile_tb.cc
+++ b/tests/verilator_sim/kelvin/vregfile_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVRegfile.h"
 
diff --git a/tests/verilator_sim/kelvin/vregfilesegment_tb.cc b/tests/verilator_sim/kelvin/vregfilesegment_tb.cc
index 0c3cfbc..6d44ad1 100644
--- a/tests/verilator_sim/kelvin/vregfilesegment_tb.cc
+++ b/tests/verilator_sim/kelvin/vregfilesegment_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVRegfileSegment.h"
 
diff --git a/tests/verilator_sim/kelvin/vst_tb.cc b/tests/verilator_sim/kelvin/vst_tb.cc
index 9c5aafb..f425a10 100644
--- a/tests/verilator_sim/kelvin/vst_tb.cc
+++ b/tests/verilator_sim/kelvin/vst_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "VVSt.h"
 
diff --git a/tests/verilator_sim/matcha/kelvin_if.h b/tests/verilator_sim/matcha/kelvin_if.h
index bf32c6c..f18ec48 100644
--- a/tests/verilator_sim/matcha/kelvin_if.h
+++ b/tests/verilator_sim/matcha/kelvin_if.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_MATCHA_KELVIN_IF_H_
 #define TESTS_VERILATOR_SIM_MATCHA_KELVIN_IF_H_
diff --git a/tests/verilator_sim/matcha/kelvin_tb.cc b/tests/verilator_sim/matcha/kelvin_tb.cc
index d5a9c50..fe1a765 100644
--- a/tests/verilator_sim/matcha/kelvin_tb.cc
+++ b/tests/verilator_sim/matcha/kelvin_tb.cc
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #include "tests/verilator_sim/sysc_tb.h"
 
diff --git a/tests/verilator_sim/sysc_module.h b/tests/verilator_sim/sysc_module.h
index 7d8637e..1836ce6 100644
--- a/tests/verilator_sim/sysc_module.h
+++ b/tests/verilator_sim/sysc_module.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_SYSC_MODULE_H_
 #define TESTS_VERILATOR_SIM_SYSC_MODULE_H_
diff --git a/tests/verilator_sim/sysc_tb.h b/tests/verilator_sim/sysc_tb.h
index 6caca7f..96302eb 100644
--- a/tests/verilator_sim/sysc_tb.h
+++ b/tests/verilator_sim/sysc_tb.h
@@ -1,4 +1,16 @@
 // Copyright 2023 Google LLC
+//
+// 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.
 
 #ifndef TESTS_VERILATOR_SIM_SYSC_TB_H_
 #define TESTS_VERILATOR_SIM_SYSC_TB_H_
diff --git a/utils/get_workspace_status.sh b/utils/get_workspace_status.sh
index 730757e..c92a9d9 100755
--- a/utils/get_workspace_status.sh
+++ b/utils/get_workspace_status.sh
@@ -1,6 +1,18 @@
 #!/bin/bash
 # Copyright 2023 Google LLC
 #
+# 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.
+#
 # This script will be run by bazel when the build process wants to generate
 # information about the status of the workspace.
 #