apic_timer.c File Reference

#include <modules/drivers/apic/apic_timer.h>
#include <modules/drivers/apic/lapic.h>
#include <kernel/cpu/cpu.h>
#include <kernel/cpu/irq.h>
#include <kernel/log/log.h>
#include <kernel/sched/clock.h>
#include <kernel/sched/timer.h>
#include <kernel/utils/utils.h>
#include <kernel/defs.h>
#include <stdint.h>

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Functions
static uint64_t	apic_timer_ticks_per_ms (void)
static void	apic_timer_set (irq_virt_t virt, clock_t uptime, clock_t timeout)
static void	apic_timer_eoi (cpu_t *cpu)
uint64_t	apic_timer_init (void)
	Initialize the APIC timer subsystem.

Variables
static timer_source_t	apicTimer

Function Documentation

apic_timer_ticks_per_ms()

static uint64_t apic_timer_ticks_per_ms ( void  )

static

Definition at line 14 of file apic_timer.c.

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apic_timer_set()

static void apic_timer_set ( irq_virt_t  virt, clock_t  uptime, clock_t  timeout  )

static

Definition at line 34 of file apic_timer.c.

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apic_timer_eoi()

static void apic_timer_eoi ( cpu_t *  cpu )

static

Definition at line 67 of file apic_timer.c.

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Variable Documentation

apicTimer

timer_source_t apicTimer

static

Initial value:

= {
    .name = "APIC Timer",
    .precision = 1000, 
    .set = apic_timer_set,
    .ack = NULL,
    .eoi = apic_timer_eoi,
}

According to https://telematics.tm.kit.edu/publications/Files/61/walter_ibm_linux_challenge.pdf, the APIC timer has a precision of 1 microsecond.

Definition at line 78 of file apic_timer.c.