blob: 215e8f64d3b38fda7ca02afdad896f2769f9cffb (
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
|
/*
* Clock Tick Device Driver
*
* This routine initializes the Real Time Clock Counter Timer which is
* part of the MEC on the ERC32 CPU.
*
* The tick frequency is directly programmed to the configured number of
* microseconds per tick.
*
* COPYRIGHT (c) 1989-2006.
* 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.
*
* Ported to ERC32 implementation of the SPARC by On-Line Applications
* Research Corporation (OAR) under contract to the European Space
* Agency (ESA).
*
* ERC32 modifications of respective RTEMS file: COPYRIGHT (c) 1995.
* European Space Agency.
*
* $Id$
*/
#include <bsp.h>
#include <bspopts.h>
#if SIMSPARC_FAST_IDLE==1
#define CLOCK_DRIVER_USE_FAST_IDLE
#endif
/*
* The Real Time Clock Counter Timer uses this trap type.
*/
#define CLOCK_VECTOR ERC32_TRAP_TYPE( ERC32_INTERRUPT_REAL_TIME_CLOCK )
#define Clock_driver_support_at_tick()
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
_old = set_vector( _new, CLOCK_VECTOR, 1 ); \
} while(0)
extern int CLOCK_SPEED;
uint32_t bsp_clock_nanoseconds_since_last_tick(void)
{
uint32_t clicks;
clicks = ERC32_MEC.Real_Time_Clock_Counter;
return (uint32_t) (BSP_Configuration.microseconds_per_tick - clicks) * 1000;
}
#define Clock_driver_nanoseconds_since_last_tick bsp_clock_nanoseconds_since_last_tick
#define Clock_driver_support_initialize_hardware() \
do { \
/* approximately 1 us per countdown */ \
ERC32_MEC.Real_Time_Clock_Scalar = CLOCK_SPEED - 1; \
ERC32_MEC.Real_Time_Clock_Counter = \
BSP_Configuration.microseconds_per_tick; \
\
ERC32_MEC_Set_Real_Time_Clock_Timer_Control( \
ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING | \
ERC32_MEC_TIMER_COUNTER_LOAD_SCALER | \
ERC32_MEC_TIMER_COUNTER_LOAD_COUNTER \
); \
\
ERC32_MEC_Set_Real_Time_Clock_Timer_Control( \
ERC32_MEC_TIMER_COUNTER_ENABLE_COUNTING | \
ERC32_MEC_TIMER_COUNTER_RELOAD_AT_ZERO \
); \
} while (0)
#define Clock_driver_support_shutdown_hardware() \
do { \
ERC32_Mask_interrupt( ERC32_INTERRUPT_REAL_TIME_CLOCK ); \
\
ERC32_MEC_Set_Real_Time_Clock_Timer_Control( \
ERC32_MEC_TIMER_COUNTER_DISABLE_COUNTING \
); \
} while (0)
#include "../../../shared/clockdrv_shell.c"
|