fpga: Add license checker module

Original-commit: 8ed8927b944e7ad8a5da040c7f1951aad3535e11

lib/sim/sec/license_check/gen_sha256.py

@@ -0,0 +1,38 @@
+#
+# Copyright 2023 Ettus Research, a National Instruments Brand
+#
+# SPDX-License-Identifier: GPL-3.0-or-later
+#
+"""
+Calculate hash values for license_check_tb
+"""
+
+import hashlib
+
+serial = [0x01, 0x23, 0x45, 0x67, 0x8A, 0xBC, 0xDE, 0xF0, 0x0C, 0x0D, 0xE0, 0xBB]
+pkey = [0x00] * 37 + [0x05, 0xEC]
+feature0 = [0x00, 0x00, 0xC0, 0xDE]
+feature1 = [0x00, 0x00, 0xF0, 0x0D]
+
+def main():
+    """
+    Calc and print hashes
+    """
+    sha0 = hashlib.sha256()
+    sha0.update(bytes(serial + pkey + feature0))
+    hash0 = sha0.hexdigest()
+    sha1 = hashlib.sha256()
+    sha1.update(bytes(serial + pkey + feature1))
+    hash1 = sha1.hexdigest()
+
+    print(f"// Feature 0 hash: 256'h{hash0}")
+    hash0_words = [f"hash0_{int(i/8)} = 32'h" + hash0[i:i+8] for i in range(0, 64, 8)]
+    print("// Individual words:")
+    print(";\n localparam ".join(hash0_words))
+    print(f"// Feature 1 hash: 256'h{hash1}")
+    hash1_words = [f"hash1_{int(i/8)} = 32'h" + hash1[i:i+8] for i in range(0, 64, 8)]
+    print("// Individual words:")
+    print(";\n localparam ".join(hash1_words))
+
+if __name__ == "__main__":
+    main()