#include <bsp.h>
#include <bsp/irq-generic.h>
#include <bspopts.h>
#include <libcpu/cpuModel.h>
#include <assert.h>
#include <rtems/timecounter.h>
#include "../../../shared/dev/clock/clockimpl.h"

Macros
#define	CLOCK_VECTOR 0

#define	CLOCK_DRIVER_ISRS_PER_TICK 1

#define	CLOCK_DRIVER_ISRS_PER_TICK_VALUE pc386_isrs_per_tick

#define	READ_8254(_lsb, _msb)

#define	Clock_driver_support_set_interrupt_affinity(online_processors)

Functions
void	Clock_isr (void *param)

void	Clock_driver_install_handler (void)

void	Clock_driver_support_initialize_hardware (void)

Variables
volatile uint32_t	pc386_microseconds_per_isr

volatile uint32_t	pc386_isrs_per_tick

uint32_t	pc386_clock_click_count

volatile uint32_t	Clock_driver_ticks
	ISRs until next clock tick.

bool	Clock_isr_enabled = false

Detailed Description

Clock Tick Device Driver

History:

Original driver was go32 clock by Joel Sherrill
go32 clock driver hardware code was inserted into new boilerplate when the pc386 BSP by: Pedro Miguel Da Cruz Neto Romano pmcnr.nosp@m.@cam.nosp@m.oes.r.nosp@m.nl.i.nosp@m.st.ut.nosp@m.l.pt Jose Rufino ruf@a.nosp@m.ster.nosp@m.ix.is.nosp@m.t.ut.nosp@m.l.pt
Reworked by Joel Sherrill to use clock driver template. This removes all boilerplate and leave original hardware code I developed for the go32 BSP.

Macro Definition Documentation

◆ Clock_driver_support_set_interrupt_affinity

#define Clock_driver_support_set_interrupt_affinity ( online_processors )

Value:

  do { \
    /* FIXME: Is there a way to do this on x86? */ \
    (void) online_processors; \
  } while (0)

◆ READ_8254

#define READ_8254	(	_lsb,
		_msb
	)

Value:

  do { outport_byte(TIMER_MODE, TIMER_SEL0|TIMER_LATCH);      \
     inport_byte(TIMER_CNTR0, _lsb);                          \
     inport_byte(TIMER_CNTR0, _msb);                          \
  } while (0)

Variable Documentation

◆ Clock_driver_ticks

volatile uint32_t Clock_driver_ticks

extern

ISRs until next clock tick.

Clock ticks since initialization

Macros