timer.c File Reference

Leon3 timer management. More...

#include <errno.h>
#include <bsp.h>
#include <core/time.h>
#include <core/sched.h>
#include <arch.h>
#include "ioports.h"
#include "sparc_conf.h"
#include "timer.h"
#include "irq.h"
#include "../traps.h"

Go to the source code of this file.

Functions
void	timer_isr (void)
pok_ret_t	pok_bsp_time_init ()

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Detailed Description

Leon3 timer management.

Author:

Fabien Chouteau

Definition in file timer.c.

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Function Documentation

pok_ret_t pok_bsp_time_init

(

)

Initialize the timer, register the ISR and unmask the interrupt.

See also:

unmask_irq(irq_nbr)

Definition at line 50 of file timer.c.

{
  outw(TIMER1 + TIMER_SCALER_OFFSET, 1);
  outw(TIMER1 + TIMER_SCAL_RELOAD_OFFSET, 1);

  outw(TIMER1 + TIMER_CNT_VAL_OFFSET, 1);
  outw(TIMER1 + TIMER_RELOAD_OFFSET, SPARC_PROC_FREQ / POK_TIMER_FREQUENCY);
  outw(TIMER1 + TIMER_CTRL_OFFSET,
       TIMER_CTRL_EN | TIMER_CTRL_RS | TIMER_CTRL_LD | TIMER_CTRL_IE);

  pok_arch_event_register(SPARC_TRAP_IRQ_BASE + TIMER_IRQ, timer_isr);
  unmask_irq(TIMER_IRQ);
  return (POK_ERRNO_OK);
}

void timer_isr

(

void

)

Timer interrupt subroutine.

See also:

ack_irq(irq_nbr)

Definition at line 39 of file timer.c.

{
  ack_irq(TIMER_IRQ);
  CLOCK_HANDLER
  return;
}