apic.c File Reference

APIC implementation. More...

#include <acpi/acpi.h>
#include <apic.h>
#include <assert.h>
#include <bsp.h>
#include <pic.h>
#include <rtems/score/idt.h>

Functions
void	apic_spurious_handler (void)
bool	lapic_initialize (void)
	Initializes the Local APIC by hardware and software enabling it.
uint32_t	lapic_timer_calc_ticks (uint64_t desired_freq_hz)
	Calculates the number of Local APIC timer ticks which can be used with lapic_timer_enable to set up a timer of given frequency.
void	lapic_timer_enable (uint32_t reload_value)
	Enables the Local APIC timer.

Variables
volatile uint32_t *	amd64_lapic_base

Detailed Description

APIC implementation.

Function Documentation

lapic_initialize()

bool lapic_initialize

(

void

)

Initializes the Local APIC by hardware and software enabling it.

Initializes the Local APIC by hardware and software enabling it, and sets up the amd64_lapic_base pointer that can be used as a 32-bit addressable array to access Local APIC registers.

Returns

true if successful.

lapic_timer_calc_ticks()

uint32_t lapic_timer_calc_ticks

(

uint64_t

desired_freq_hz

)

Calculates the number of Local APIC timer ticks which can be used with lapic_timer_enable to set up a timer of given frequency.

Parameters

desired_freq_hz

The frequency in Hz.

Returns

The number of Local APIC timer ticks.

lapic_timer_enable()

void lapic_timer_enable

(

uint32_t

reload_value

)

Enables the Local APIC timer.

Parameters

reload_value

Number of ticks per interrupt.