/*********************************************************************
 *                
 * Copyright (C) 2002-2003, 2007-2010,  Karlsruhe University
 *                
 * File path:     glue/v4-x86/schedule.h
 * Description:   scheduling functions
 *                
 * 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 AUTHOR 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 AUTHOR 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.
 *                
 * $Id: schedule.h,v 1.6 2003/09/24 19:04:36 skoglund Exp $
 *                
 ********************************************************************/
#ifndef __GLUE__V4_X86__SCHEDULE_H__
#define __GLUE__V4_X86__SCHEDULE_H__

#include INC_API(kernelinterface.h)

INLINE u32_t get_timer_tick_length()
{
    return TIMER_TICK_LENGTH;
}

/**
 * sets the current processor asleep
 */
#ifndef CONFIG_SMP_IDLE_POLL
INLINE void processor_sleep()
{
    x86_sleep();
}
#else
extern void processor_sleep();
#endif

INLINE u64_t get_cpu_cycles()
{
    // We hope that all processors have synchronized cycle counters.
    return x86_rdtsc();
}

INLINE u64_t get_timestamp()
{
    // We hope that all processors have synchronized cycle counters.
    return get_cpu_cycles() / 
        (get_kip()->processor_info.get_procdesc(0)->internal_freq / 1000);
}

#endif /* !__GLUE__V4_X86__SCHEDULE_H__ */