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diff --git a/cpukit/include/rtems/imfsimpl.h b/cpukit/include/rtems/imfsimpl.h
new file mode 100644
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+++ b/cpukit/include/rtems/imfsimpl.h
@@ -0,0 +1,92 @@
+/* SPDX-License-Identifier: BSD-2-Clause */
+
+/**
+ * @file
+ *
+ * @brief This header file contains interfaces used by the implementation of
+ *   the In-Memory File System.
+ */
+
+/*
+ * Copyright (C) 2013, 2018 embedded brains GmbH & Co. KG
+ *
+ * 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 OWNER 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 _RTEMS_IMFSIMPL_H
+#define _RTEMS_IMFSIMPL_H
+
+#include <rtems/imfs.h>
+#include <rtems/score/timecounter.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @addtogroup IMFS
+ *
+ * @{
+ */
+
+static inline time_t _IMFS_get_time( void )
+{
+  struct bintime now;
+
+  /* Use most efficient way to get the time in seconds (CLOCK_REALTIME) */
+  _Timecounter_Getbintime( &now );
+
+  return now.sec;
+}
+
+static inline void IMFS_update_atime( IMFS_jnode_t *jnode )
+{
+  jnode->stat_atime = _IMFS_get_time();
+}
+
+static inline void IMFS_update_mtime( IMFS_jnode_t *jnode )
+{
+  jnode->stat_mtime = _IMFS_get_time();
+}
+
+static inline void IMFS_update_ctime( IMFS_jnode_t *jnode )
+{
+  jnode->stat_ctime = _IMFS_get_time();
+}
+
+static inline void IMFS_mtime_ctime_update( IMFS_jnode_t *jnode )
+{
+  time_t now;
+
+  now = _IMFS_get_time();
+
+  jnode->stat_mtime = now;
+  jnode->stat_ctime = now;
+}
+
+/** @} */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _RTEMS_IMFSIMPL_H */