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/*
* Timer Init
*
* Use the last DMA timer (DTIM3) as the diagnostic timer.
*
* Author: W. Eric Norum <norume@aps.anl.gov>
*
* COPYRIGHT (c) 2005.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.com/license/LICENSE.
*/
#include <rtems.h>
#include <bsp.h>
void
benchmark_timerinitialize(void)
{
int preScaleDivisor = bsp_get_CPU_clock_speed() / 1000000;
int div = MCF5282_TIMER_DTMR_CLK_DIV1;
if (preScaleDivisor > 256) {
preScaleDivisor /= 16;
div = MCF5282_TIMER_DTMR_CLK_DIV16;
}
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)
{
}
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