RTOS/rtems
1
0
Fork 0
forked from Imagelibrary/rtems
Code Pull Requests Activity

2001-01-09 Joel Sherrill <joel@OARcorp.com>

Browse Source 
* clockdrv_shell.c (CLOCK_DRIVER_ISRS_PER_TICK): Add support for
	multiple ISRs per clock tick.  Testing per hacking on mips/jmr3904
	clock driver.
This commit is contained in:
Joel Sherrill
2001-01-09 17:10:56 +00:00
parent 026f4aa247
commit d3d5319334
2 changed files with 51 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
c/src/lib/libbsp/shared/ChangeLog
View File

@@ -1,3 +1,9 @@
2001-01-09 Joel Sherrill <joel@OARcorp.com>
* clockdrv_shell.c (CLOCK_DRIVER_ISRS_PER_TICK): Add support for
multiple ISRs per clock tick. Testing per hacking on mips/jmr3904
clock driver.
2001-01-03 Joel Sherrill <joel@OARcorp.com>
* clockdrv_shell.c: Fixed syntax error in fast idle support.

59
c/src/lib/libbsp/shared/clockdrv_shell.c
View File

@@ -16,18 +16,34 @@
#include <bsp.h>
#include <rtems/libio.h>
#if defined(CLOCK_DRIVER_USE_FAST_IDLE) && defined(CLOCK_DRIVER_ISRS_PER_TICK)
#error "clockdrv_shell.c: fast idle and N ISRs per tick is not supported"
#endif
/*
* ISRs until next clock tick
*/
#ifdef CLOCK_DRIVER_ISRS_PER_TICK
volatile rtems_unsigned32 Clock_driver_isrs;
#endif
/*
* Clock ticks since initialization
*/
volatile rtems_unsigned32 Clock_driver_ticks;
/*
* ISR formerly installed.
*/
rtems_isr_entry Old_ticker;
void Clock_exit( void );
/*
* These are set by clock driver during its init
* Major and minor number.
*/
rtems_device_major_number rtems_clock_major = ~0;
@@ -51,16 +67,23 @@ rtems_isr Clock_isr(
rtems_vector_number vector
)
{
/*
* Accurate count of ISRs
*/
Clock_driver_ticks += 1;
#ifdef CLOCK_DRIVER_USE_FAST_IDLE
do {
Clock_driver_ticks += 1;
rtems_clock_tick();
} while ( _Thread_Executing == _Thread_Idle &&
_Thread_Heir == _Thread_Executing);
Clock_driver_support_at_tick();
return;
#else
/*
* Do the hardware specific per-tick action.
*
@@ -69,21 +92,25 @@ rtems_isr Clock_isr(
Clock_driver_support_at_tick();
#ifdef CLOCK_DRIVER_ISRS_PER_TICK
/*
* The driver has seen another tick.
* The driver is multiple ISRs per clock tick.
*/
Clock_driver_ticks += 1;
if ( !Clock_driver_isrs ) {
/*
*/
#ifndef CLOCK_DRIVER_ISRS_ARE_ONE_MILLISECOND
rtems_clock_tick();
#else
#error "Clock driver shell: Does not currently support counting mseconds."
#endif
Clock_driver_isrs = CLOCK_DRIVER_ISRS_PER_TICK;
}
Clock_driver_isrs--;
#else
/*
* The driver is one ISR per clock tick.
*/
rtems_clock_tick();
#endif
#endif
}
@@ -101,8 +128,6 @@ rtems_isr Clock_isr(
*
*/
extern int CLOCK_SPEED;
void Install_clock(
rtems_isr_entry clock_isr
)
@@ -176,6 +201,14 @@ rtems_device_driver Clock_initialize(
rtems_clock_major = major;
rtems_clock_minor = minor;
/*
* If we are counting ISRs per tick, then initialize the counter.
*/
#ifdef CLOCK_DRIVER_ISRS_PER_TICK
Clock_driver_isrs = CLOCK_DRIVER_ISRS_PER_TICK;
#endif
return RTEMS_SUCCESSFUL;
}