blob: a8cb5171d18c0e1fbd90566f7efc44e0af929525 (
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
|
/*
* Instantiate the clock driver shell for psim based
* on the decrementer register.
*
* $Id$
*/
#include <rtems.h>
/*
* If defined, speed up the clock ticks while the idle task is running so
* time spent in the idle task is minimized. This significantly reduces
* the wall time required to execute the RTEMS test suites.
*/
#define CLOCK_DRIVER_USE_FAST_IDLE
#define CLOCK_VECTOR PPC_IRQ_DECREMENTER
/* On psim, each click of the decrementer register corresponds
* to 1 instruction. By setting this to 100, we are indicating
* that we are assuming it can execute 100 instructions per
* microsecond. This corresponds to sustaining 1 instruction
* per cycle at 100 Mhz. Whether this is a good guess or not
* is anyone's guess.
*/
extern int PSIM_INSTRUCTIONS_PER_MICROSECOND;
unsigned int PPC_DECREMENTER_CLICKS;
#define Clock_driver_support_install_isr( _new, _old ) \
do { \
_old = (rtems_isr_entry) set_vector( _new, CLOCK_VECTOR, 1 ); \
PPC_DECREMENTER_CLICKS = (unsigned int)&PSIM_INSTRUCTIONS_PER_MICROSECOND; \
PPC_DECREMENTER_CLICKS *= rtems_configuration_get_microseconds_per_tick(); \
/* PPC_DECREMENTER_CLICKS = 5000; */ \
} while(0)
#define Clock_driver_support_initialize_hardware() \
do { \
unsigned int _clicks = PPC_DECREMENTER_CLICKS; \
PPC_Set_decrementer( _clicks ); \
} while (0)
#define Clock_driver_support_at_tick() \
Clock_driver_support_initialize_hardware()
#define Clock_driver_support_shutdown_hardware()
#include "../../../shared/clockdrv_shell.c"
|
