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diff --git a/bertos/emul/timer_posix.h b/bertos/emul/timer_posix.h
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+/**
+ * \file
+ * <!--
+ * This file is part of BeRTOS.
+ *
+ * Bertos is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ * As a special exception, you may use this file as part of a free software
+ * library without restriction.  Specifically, if other files instantiate
+ * templates or use macros or inline functions from this file, or you compile
+ * this file and link it with other files to produce an executable, this
+ * file does not by itself cause the resulting executable to be covered by
+ * the GNU General Public License.  This exception does not however
+ * invalidate any other reasons why the executable file might be covered by
+ * the GNU General Public License.
+ *
+ * Copyright 2005 Develer S.r.l. (http://www.develer.com/)
+ *
+ * -->
+ *
+ * \version $Id$
+ *
+ * \author Bernardo Innocenti <bernie@develer.com>
+ *
+ * \brief Low-level timer module for POSIX systems (interface).
+ */
+#ifndef DRV_TIMER_POSIX_H
+#define DRV_TIMER_POSIX_H
+
+// HW dependent timer initialization
+
+#define DEFINE_TIMER_ISR     void timer_isr(UNUSED_ARG(int, arg))
+
+/** Most Linux kernels can't do better than this (CONFIG_HZ=250). */
+#define TIMER_TICKS_PER_SEC  250
+
+#define TIMER_HW_CNT         (1<<31) /* We assume 32bit integers here */
+
+#include <os/hptime.h>
+
+/// Frequency of the hardware high-precision timer.
+#define TIMER_HW_HPTICKS_PER_SEC  HPTIME_TICKS_PER_SECOND
+
+/// Not needed.
+#define timer_hw_irq() do {} while (0)
+
+#endif /* DRV_TIMER_POSIX_H */