diff --git a/hifi/xaf/host-apf/proxy/xf-trace.c b/hifi/xaf/host-apf/proxy/xf-trace.c
new file mode 100644
index 0000000..fb90267
--- /dev/null
+++ b/hifi/xaf/host-apf/proxy/xf-trace.c
@@ -0,0 +1,90 @@
+/*******************************************************************************
+* Copyright (C) 2018 Cadence Design Systems, Inc.
+* 
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to use this Software with Cadence processor cores only and 
+* not with any other processors and platforms, subject to
+* the following conditions:
+* 
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+* 
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+******************************************************************************/
+
+#include "xf.h"
+#include <sys/time.h>
+
+#if XF_TRACE
+/*******************************************************************************
+ * Local data definitions
+ ******************************************************************************/
+
+/* ...tracing lock */
+static pthread_mutex_t  xf_trace_mutex;
+
+/*******************************************************************************
+ * Tracing facility
+ ******************************************************************************/
+
+/* ...timestamp function */
+static u32 xf_timenow(void)
+{
+    struct timeval          tv;
+
+    /* ...get current time value */
+    gettimeofday(&tv, NULL);
+
+    /* ...wrap over every 100 seconds */
+    return (u32)((tv.tv_sec % 100) * 1000000 + tv.tv_usec);
+}
+
+/* ...tracing initialization */
+void xf_trace_init(const char *banner)
+{
+    /* ...initialize tracing lock */
+    pthread_mutex_init(&xf_trace_mutex, NULL);
+
+    /* ...output banner */
+    xf_trace(banner);
+}
+
+/* ...tracing primitive */
+int xf_trace(const char *format, ...)
+{
+    va_list     args;
+    static char buf[256];
+    char       *b = buf;
+    
+    /* ...get global tracing lock */
+    pthread_mutex_lock(&xf_trace_mutex);
+
+    /* ...output timestamp */
+    b += sprintf(b, "[%08u] ", xf_timenow());
+
+    /* ...output format string */
+    va_start(args, format);
+    b += vsprintf(b, format, args);
+    va_end(args);
+
+    /* ...put terminator */
+    *b = '\0';
+
+    /* ...output prepared string */
+    __xf_puts(buf);
+    
+    /* ...release tracing lock */
+    pthread_mutex_unlock(&xf_trace_mutex);
+
+    return 0;
+}
+
+#endif  /* XF_TRACE */