blob: 312d699a2884e9a71640e27752b5b42c27c0a250 (
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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/*
* RTEMS TQM8xx BSP
*
* This file contains the console driver.
*/
/*
* Copyright (c) 2008 Thomas Doerfler, embedded brains GmbH & Co. KG
* 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.
*/
/*
* 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>
*/
/*
*
* 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.org/license/LICENSE.
*/
#include <rtems.h>
#include <bsp.h>
#include <rtems/btimer.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
*/
benchmark_timer_t benchmark_timer_read(void)
{
uint32_t 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;
}
|
