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

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* 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
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6
c/src/lib/libbsp/shared/ChangeLog
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@@ -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> 2001-01-03 Joel Sherrill <joel@OARcorp.com>
* clockdrv_shell.c: Fixed syntax error in fast idle support. * clockdrv_shell.c: Fixed syntax error in fast idle support.

57
c/src/lib/libbsp/shared/clockdrv_shell.c
View File

@@ -16,18 +16,34 @@
#include <bsp.h> #include <bsp.h>
#include <rtems/libio.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 * Clock ticks since initialization
*/ */
volatile rtems_unsigned32 Clock_driver_ticks; volatile rtems_unsigned32 Clock_driver_ticks;
/*
* ISR formerly installed.
*/
rtems_isr_entry Old_ticker; rtems_isr_entry Old_ticker;
void Clock_exit( void ); 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; rtems_device_major_number rtems_clock_major = ~0;
@@ -51,16 +67,23 @@ rtems_isr Clock_isr(
rtems_vector_number vector rtems_vector_number vector
) )
{ {
/*
* Accurate count of ISRs
*/
Clock_driver_ticks += 1;
#ifdef CLOCK_DRIVER_USE_FAST_IDLE #ifdef CLOCK_DRIVER_USE_FAST_IDLE
do { do {
Clock_driver_ticks += 1;
rtems_clock_tick(); rtems_clock_tick();
} while ( _Thread_Executing == _Thread_Idle && } while ( _Thread_Executing == _Thread_Idle &&
_Thread_Heir == _Thread_Executing); _Thread_Heir == _Thread_Executing);
Clock_driver_support_at_tick(); Clock_driver_support_at_tick();
return; return;
#else #else
/* /*
* Do the hardware specific per-tick action. * Do the hardware specific per-tick action.
* *
@@ -69,21 +92,25 @@ rtems_isr Clock_isr(
Clock_driver_support_at_tick(); 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 ) {
/* rtems_clock_tick();
*/
#ifndef CLOCK_DRIVER_ISRS_ARE_ONE_MILLISECOND Clock_driver_isrs = CLOCK_DRIVER_ISRS_PER_TICK;
rtems_clock_tick(); }
Clock_driver_isrs--;
#else #else
#error "Clock driver shell: Does not currently support counting mseconds."
#endif
/*
* The driver is one ISR per clock tick.
*/
rtems_clock_tick();
#endif
#endif #endif
} }
@@ -101,8 +128,6 @@ rtems_isr Clock_isr(
* *
*/ */
extern int CLOCK_SPEED;
void Install_clock( void Install_clock(
rtems_isr_entry clock_isr rtems_isr_entry clock_isr
) )
@@ -176,6 +201,14 @@ rtems_device_driver Clock_initialize(
rtems_clock_major = major; rtems_clock_major = major;
rtems_clock_minor = minor; 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; return RTEMS_SUCCESSFUL;
} }