lapic.c File Reference

#include <miniOS/arch/x86_64/apic.h>
#include <miniOS/arch/x86_64/port.h>
#include <miniOS/arch/x86_64/irq.h>
#include <miniOS/arch/x86_64/segment.h>
#include <miniOS/arch/x86_64/smp.h>
#include <miniOS/mm/vmm.h>
#include <miniOS/io.h>
#include <miniOS/sched/sched.h>

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Functions
static void	pic_disable (void)
void	lapic_init (void)
	Detect, identity-map, and software-enable the local APIC.
void	lapic_eoi_asm (void)
	Non-inline wrapper for lapic_eoi(), callable from assembly.
static uint64_t	lapic_rdtsc (void)
void	lapic_timer_isr (void *frame)
void	lapic_timer_idt_install (void)
	Install the IDT entry for LAPIC_TIMER_VECTOR (48).
void	lapic_timer_init (void)
	Calibrate and start the BSP LAPIC timer.
void	lapic_timer_init_ap (void)
	Start the LAPIC timer on the calling AP.
void	lapic_send_ipi (uint8_t target_lapic_id, uint8_t vector)
	Send a Fixed IPI to a remote CPU.
void	sched_kick_isr (void *frame)

Variables
volatile uint32_t *	lapic_base = NULL
uint32_t	lapic_bsp_timer_icr = 0
volatile uint64_t	lapic_tick_count = 0
uint64_t	miniOS_tsc_hz = 0
uint64_t	miniOS_tsc_boot = 0

Function Documentation

lapic_rdtsc()

uint64_t lapic_rdtsc ( void )

inlinestatic

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lapic_timer_isr()

void lapic_timer_isr

(

void *

frame

)

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pic_disable()

void pic_disable ( void )

static

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sched_kick_isr()

void sched_kick_isr

(

void *

frame

)

sched_kick_isr() - Scheduler-kick IPI C handler. @frame: Interrupt frame pointer (unused).

Called from sched_kick_wrapper on the remote CPU. Sends EOI before calling sched_tick() so the LAPIC can accept new interrupts while the context switch is in progress.

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Variable Documentation

miniOS_tsc_boot

uint64_t miniOS_tsc_boot = 0

miniOS_tsc_hz

uint64_t miniOS_tsc_hz = 0