diff --git a/include/tools_share/sptool.h b/include/tools_share/sptool.h
new file mode 100644
index 0000000..67a2cf0
--- /dev/null
+++ b/include/tools_share/sptool.h
@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2018, Arm Limited. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef SPTOOL_H
+#define SPTOOL_H
+
+#include <stdint.h>
+
+/* Header for a secure partition package. There is one per package. */
+struct sp_pkg_header {
+	uint64_t version;
+	uint64_t number_of_sp;
+};
+
+/*
+ * Entry descriptor in a secure partition package. Each entry comprises a
+ * secure partition and its resource description.
+ */
+struct sp_pkg_entry {
+	uint64_t sp_offset;
+	uint64_t sp_size;
+	uint64_t rd_offset;
+	uint64_t rd_size;
+};
+
+#endif /* SPTOOL_H */