1 files changed, 72 insertions, 0 deletions
diff --git a/include/drivers/arm/cryptocell/util.h b/include/drivers/arm/cryptocell/util.h
new file mode 100644
index 00000000..18fb5999
--- /dev/null
+++ b/include/drivers/arm/cryptocell/util.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef UTIL_H
+#define UTIL_H
+
+/*
+ * All the includes that are needed for code using this module to
+ * compile correctly should be #included here.
+ */
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+/************************ Defines ******************************/
+
+/* invers the bytes on a word- used for output from HASH */
+#ifdef BIG__ENDIAN
+#define UTIL_INVERSE_UINT32_BYTES(val)	(val)
+#else
+#define UTIL_INVERSE_UINT32_BYTES(val) \
+	(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | (((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
+#endif
+
+/* invers the bytes on a word - used for input data for HASH */
+#ifdef BIG__ENDIAN
+#define UTIL_REVERT_UINT32_BYTES(val) \
+	(((val) >> 24) | (((val) & 0x00FF0000) >> 8) | (((val) & 0x0000FF00) << 8) | (((val) & 0x000000FF) << 24))
+#else
+#define UTIL_REVERT_UINT32_BYTES(val)	(val)
+#endif
+
+ /* ------------------------------------------------------------
+ **
+ * @brief This function executes a reverse bytes copying from one buffer to another buffer.
+ *
+ * @param[in] dst_ptr - The pointer to destination buffer.
+ * @param[in] src_ptr - The pointer to source buffer.
+ * @param[in] size    - The size in bytes.
+ *
+ */
+
+void UTIL_ReverseMemCopy(uint8_t *dst_ptr, uint8_t *src_ptr, uint32_t size);
+
+
+ /* ------------------------------------------------------------
+  **
+  * @brief This function executes a reversed byte copy on a specified buffer.
+  *
+  *        on a 6 byte byffer:
+  *
+  *        buff[5] <---> buff[0]
+  *        buff[4] <---> buff[1]
+  *        buff[3] <---> buff[2]
+  *
+  * @param[in] dst_ptr - The counter buffer.
+  * @param[in] src_ptr - The counter size in bytes.
+  *
+  */
+void UTIL_ReverseBuff(uint8_t *buff_ptr, uint32_t size);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif