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|
/*===============================================================*\
| Project: RTEMS TQM8xx BSP |
+-----------------------------------------------------------------+
| This file has been adapted to MPC8xx by |
| Thomas Doerfler <Thomas.Doerfler@embedded-brains.de> |
| Copyright (c) 2008 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
| |
| See the other copyright notice below for the original parts. |
+-----------------------------------------------------------------+
| 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. |
| |
+-----------------------------------------------------------------+
| this file contains the console driver |
\*===============================================================*/
/*
* benchmark_timer_initialize()
*
* Use TIMER 1 and TIMER 2 for Timing Test Suite
*
* this is derived from "timer.c" available in the m68k/gen68360 BSP
* adapted by Thomas Doerfler <Thomas.Doerfler@embedded-brains.de>
*
* $Id$
*/
/*
*
* 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) 1989-1999.
* 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>
#include <mpc8xx.h>
bool benchmark_timer_find_average_overhead;
void
benchmark_timer_initialize (void)
{
/*
* Reset timers 1 and 2
*/
m8xx.tgcr &= ~0x00FF;
m8xx.tcn1 = 0;
m8xx.tcn2 = 0;
m8xx.ter1 = 0xFFFF;
m8xx.ter2 = 0xFFFF;
/*
* Cascade timers 1 and 2
*/
m8xx.tgcr |= M8xx_TGCR_CAS2;
/*
* Configure timers 1 and 2 to a single 32-bit, BUS_clock timer.
*/
m8xx.tmr2 = (0 << 8) | 0x2;
m8xx.tmr1 = 0;
/*
* Start the timers
*/
m8xx.tgcr |= 0x0011;
}
/*
* Return timer value in microsecond units
*/
int benchmark_timer_read(void)
{
int retval;
retval = *(uint32_t*)&m8xx.tcn1;
retval = retval * 1000000LL / BSP_bus_frequency;
return retval;
}
void benchmark_timer_disable_subtracting_average_overhead(
bool find_flag
)
{
benchmark_timer_find_average_overhead = find_flag;
}
|
