Implement new swap scheme for devices with large erase size using scratch with status area
diff --git a/boot/bootutil/src/crc32c.h b/boot/bootutil/src/crc32c.h
new file mode 100644
index 0000000..329b9d3
--- /dev/null
+++ b/boot/bootutil/src/crc32c.h
@@ -0,0 +1,32 @@
+/*
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Copyright (c) 2020 Cypress Semiconductors
+ *
+ * Original license:
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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 H_CRC32C_
+#define H_CRC32C_
+
+#include <stdint.h>
+
+uint32_t crc32c_checksum(const uint8_t *address, uint32_t length);
+
+#endif /* H_CRC32C_ */