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diff --git a/lib/libutee/include/tee_internal_api_extensions.h b/lib/libutee/include/tee_internal_api_extensions.h
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+++ b/lib/libutee/include/tee_internal_api_extensions.h
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+/*
+ * Copyright (c) 2014, STMicroelectronics International N.V.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef TEE_INTERNAL_API_EXTENSIONS_H
+#define TEE_INTERNAL_API_EXTENSIONS_H
+
+/* trace support */
+#include <trace.h>
+#include <stdio.h>
+#include <tee_api_defines_extensions.h>
+#include <tee_api_types.h>
+
+void tee_user_mem_mark_heap(void);
+size_t tee_user_mem_check_heap(void);
+/* Hint implementation defines */
+#define TEE_USER_MEM_HINT_NO_FILL_ZERO       0x80000000
+
+/*
+ * Cache maintenance support (TA requires the CACHE_MAINTENANCE property)
+ *
+ * TEE_CacheClean() Write back to memory any dirty data cache lines. The line
+ *                  is marked as not dirty. The valid bit is unchanged.
+ *
+ * TEE_CacheFlush() Purges any valid data cache lines. Any dirty cache lines
+ *                  are first written back to memory, then the cache line is
+ *                  invalidated.
+ *
+ * TEE_CacheInvalidate() Invalidate any valid data cache lines. Any dirty line
+ *                       are not written back to memory.
+ */
+TEE_Result TEE_CacheClean(char *buf, size_t len);
+TEE_Result TEE_CacheFlush(char *buf, size_t len);
+TEE_Result TEE_CacheInvalidate(char *buf, size_t len);
+
+#endif