diff --git a/pipelined/config/buildroot/wally-config.vh b/pipelined/config/buildroot/wally-config.vh
index 56292c84..5ab833be 100644
--- a/pipelined/config/buildroot/wally-config.vh
+++ b/pipelined/config/buildroot/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/fpga/wally-config.vh b/pipelined/config/fpga/wally-config.vh
index 16f7ca45..4989b571 100644
--- a/pipelined/config/fpga/wally-config.vh
+++ b/pipelined/config/fpga/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv32e/wally-config.vh b/pipelined/config/rv32e/wally-config.vh
index f029e0e6..66d4049f 100644
--- a/pipelined/config/rv32e/wally-config.vh
+++ b/pipelined/config/rv32e/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv32gc/wally-config.vh b/pipelined/config/rv32gc/wally-config.vh
index 4d346e5a..85c207e9 100644
--- a/pipelined/config/rv32gc/wally-config.vh
+++ b/pipelined/config/rv32gc/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv32i/wally-config.vh b/pipelined/config/rv32i/wally-config.vh
index 7fb355c5..b6330579 100644
--- a/pipelined/config/rv32i/wally-config.vh
+++ b/pipelined/config/rv32i/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv32ic/wally-config.vh b/pipelined/config/rv32ic/wally-config.vh
index 311ce8ab..085bbad3 100644
--- a/pipelined/config/rv32ic/wally-config.vh
+++ b/pipelined/config/rv32ic/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv64fpquad/wally-config.vh b/pipelined/config/rv64fpquad/wally-config.vh
index 2df9867f..aab3df73 100644
--- a/pipelined/config/rv64fpquad/wally-config.vh
+++ b/pipelined/config/rv64fpquad/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv64gc/wally-config.vh b/pipelined/config/rv64gc/wally-config.vh
index 29148944..606c95eb 100644
--- a/pipelined/config/rv64gc/wally-config.vh
+++ b/pipelined/config/rv64gc/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/rv64i/wally-config.vh b/pipelined/config/rv64i/wally-config.vh
index c7304c72..203ee455 100644
--- a/pipelined/config/rv64i/wally-config.vh
+++ b/pipelined/config/rv64i/wally-config.vh
@@ -11,18 +11,19 @@
 // 
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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 shared configuration
 `include "wally-shared.vh"
diff --git a/pipelined/config/shared/wally-constants.vh b/pipelined/config/shared/wally-constants.vh
index 0acc12b8..0999fc20 100644
--- a/pipelined/config/shared/wally-constants.vh
+++ b/pipelined/config/shared/wally-constants.vh
@@ -15,18 +15,19 @@
 //
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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.
+////////////////////////////////////////////////////////////////////////////////////////////////
 
 // constants defining different privilege modes
 // defined in Table 1.1 of the privileged spec
diff --git a/pipelined/config/shared/wally-shared.vh b/pipelined/config/shared/wally-shared.vh
index 2fcb3af7..4e43c721 100644
--- a/pipelined/config/shared/wally-shared.vh
+++ b/pipelined/config/shared/wally-shared.vh
@@ -9,18 +9,19 @@
 //
 // Copyright (C) 2021 Harvey Mudd College & Oklahoma State University
 //
-// 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:
+// SPDX-License-Identifier: Apache-2.0 WITH SHL-2.1
 //
-// The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+// Licensed under the Solderpad Hardware License v 2.1 (the “License”); you may not use this file 
+// except in compliance with the License, or, at your option, the Apache License version 2.0. You 
+// may obtain a copy of the License at
 //
-// 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.
-///////////////////////////////////////////
+// https://solderpad.org/licenses/SHL-2.1/
+//
+// Unless required by applicable law or agreed to in writing, any work 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.
+////////////////////////////////////////////////////////////////////////////////////////////////
 
 // division constants
 `define RADIX 32'h4