/*
 * RTEMS generic mcf548x BSP
 *
 * The file contains the diagnostic timer code of generic MCF548x
 * BSP.
 *
 * Parts of the code has been derived from the "dBUG source code"
 * package Freescale is providing for M548X EVBs. The usage of
 * the modified or unmodified code and it's integration into the
 * generic mcf548x BSP has been done according to the Freescale
 * license terms.
 *
 * The Freescale license terms can be reviewed in the file
 *
 *    LICENSE.Freescale
 *
 * The generic mcf548x BSP has been developed on the basic
 * structures and modules of the av5282 BSP.
 */

/*
 * Copyright (c) 2007 embedded brains GmbH. All rights reserved.
 *
 * The license and distribution terms for this file may be
 * found in the file LICENSE in this distribution or at
 * http://www.rtems.org/license/LICENSE.
 */

/*
 *  Timer Init
 *
 *  Use the second slice timer (SLT1) as the diagnostic timer.
 */

#include <rtems.h>
#include <rtems/btimer.h>
#include <bsp.h>
#include <mcf548x/mcf548x.h>

bool benchmark_timer_find_average_overhead;
static uint32_t microsecond_timer_value = 0;

void benchmark_timer_initialize(void)
{
    MCF548X_SLT_SLTCNT1 = 0xFFFFFFFF;
    MCF548X_SLT_SCR1 |= (MCF548X_SLT_SCR_TEN | MCF548X_SLT_SCR_RUN);
}

/*
 * Return timer value in microsecond units
 * XLB clock 100 MHz / 1us is equal to 100 counts
 */
uint32_t
benchmark_timer_read(void)
{
    microsecond_timer_value = (0xFFFFFFFF - MCF548X_SLT_SCNT1)/100;

    return microsecond_timer_value;
}

void
benchmark_timer_disable_subtracting_average_overhead(bool find_flag)
{
    benchmark_timer_find_average_overhead = find_flag;
}