c/src/lib/libbsp/m68k/av5282/timer/timer.c


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/*
 *  Timer Init
 *
 *  Use the last DMA timer (DTIM3) as the diagnostic timer.
 */

#include <rtems.h>
#include <bsp.h>

void
benchmark_timerinitialize(void)
{
    int preScaleDivisor = 58;
    int div = MCF5282_TIMER_DTMR_CLK_DIV1;
    MCF5282_TIMER3_DTRR = 0x2710;
    MCF5282_TIMER3_DTMR = 0;
    MCF5282_TIMER3_DTMR = MCF5282_TIMER_DTMR_PS(preScaleDivisor - 1) | div |
                          MCF5282_TIMER_DTMR_RST;
}

/*
 * Return timer value in microsecond units
 */
int
benchmark_timerread(void)
{
    return MCF5282_TIMER3_DTCN;
}

/*
 *  Empty function call used in loops to measure basic cost of looping
 *  in Timing Test Suite.
 */
rtems_status_code
benchmark_timerempty_function(void)
{
    return RTEMS_SUCCESSFUL;
}

void
benchmark_timerdisable_subtracting_average_overhead(rtems_boolean find_flag)
{
}