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/*
* Timer_init()
*
* Use TIMER 1 and TIMER 2 for Timing Test Suite
*
* The hardware on the MC68360 makes these routines very simple.
*
* Based on the `gen68302' board support package, and covered by the
* original distribution terms.
*
* W. Eric Norum
* Saskatchewan Accelerator Laboratory
* University of Saskatchewan
* Saskatoon, Saskatchewan, CANADA
* eric@skatter.usask.ca
*
* $Id$
*/
/*
*
* Input parameters: NONE
*
* Output parameters: NONE
*
* NOTE: It is important that the timer start/stop overhead be
* determined when porting or modifying this code.
*
* COPYRIGHT (c) 1989-1997.
* On-Line Applications Research Corporation (OAR).
* Copyright assigned to U.S. Government, 1994.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.OARcorp.com/rtems/license.html.
*/
#include <rtems.h>
#include <bsp.h>
#include "m68360.h"
void
Timer_initialize (void)
{
/*
* Reset timers 1 and 2
*/
m360.tgcr &= ~0x00FF;
m360.tcn1 = 0;
m360.tcn2 = 0;
m360.ter1 = 0xFFFF;
m360.ter2 = 0xFFFF;
/*
* Cascade timers 1 and 2
*/
m360.tgcr |= 0x0080;
/*
* Configure timers 1 and 2 to a single 32-bit, 1 MHz timer.
* HARDWARE:
* Change the `25' to match your processor clock
*/
m360.tmr2 = ((25-1) << 8) | 0x2;
m360.tmr1 = 0;
/*
* Start the timers
*/
m360.tgcr |= 0x0011;
}
/*
* Return timer value in microsecond units
*/
int
Read_timer (void)
{
return *(rtems_unsigned32 *)&m360.tcn1;
}
/*
* Empty function call used in loops to measure basic cost of looping
* in Timing Test Suite.
*/
rtems_status_code
Empty_function (void)
{
return RTEMS_SUCCESSFUL;
}
void
Set_find_average_overhead(rtems_boolean find_flag)
{
}
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