blob: c763d5d81d70a8a5b43bb52524e25184db8ac88a (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* 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;
}
|
