blob: 80d91fe4f3341f684af970f22a3ebf5577b2bf76 (
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
|
/*
* Use SYS_CLK as system clock
*
* Copyright (c) 2005-2006 Kolja Waschk, rtemsdev/ixo.de
*/
#include <rtems.h>
#include <bsp.h>
#define CLOCK_REGS ((altera_avalon_timer_regs*)NIOS2_IO_BASE(CLOCK_BASE))
/*
* Periodic interval timer interrupt handler
*/
#define Clock_driver_support_at_tick() \
do { CLOCK_REGS->status = 0; } while(0)
/*
* Attach clock interrupt handler
*/
#define Clock_driver_support_install_isr(_new) \
set_vector(_new, CLOCK_VECTOR, 1)
/*
* Turn off the clock
*/
#define Clock_driver_support_shutdown_hardware() \
do { \
CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK; \
} while (0)
/*
* Set up the clock hardware
*/
static void Clock_driver_support_initialize_hardware(void)
{
uint32_t period;
CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_STOP_MSK;
period = (CLOCK_FREQ/1000000L)*rtems_configuration_get_microseconds_per_tick() - 1;
CLOCK_REGS->period_hi = period >> 16;
CLOCK_REGS->period_lo = period & 0xFFFF;
CLOCK_REGS->control = ALTERA_AVALON_TIMER_CONTROL_ITO_MSK |
ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
ALTERA_AVALON_TIMER_CONTROL_START_MSK;
NIOS2_IENABLE(1 << CLOCK_VECTOR);
}
#define CLOCK_DRIVER_USE_DUMMY_TIMECOUNTER
#include "../../../shared/clockdrv_shell.h"
|