apic.h File Reference

#include <miniOS/types.h>

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Macros
#define	LAPIC_ID   0x020 /* Local APIC ID register */
#define	LAPIC_EOI   0x0B0 /* End-of-Interrupt register */
#define	LAPIC_SVR   0x0F0 /* Spurious Interrupt Vector Register */
#define	LAPIC_ICR_LOW   0x300 /* Interrupt Command Register low */
#define	LAPIC_ICR_HIGH   0x310 /* Interrupt Command Register high */
#define	LAPIC_TIMER_LVT   0x320 /* LVT Timer register */
#define	LAPIC_TIMER_ICR   0x380 /* Timer Initial Count Register */
#define	LAPIC_TIMER_CCR   0x390 /* Timer Current Count Register */
#define	LAPIC_TIMER_DCR   0x3E0 /* Timer Divide Configuration Register*/
#define	LAPIC_SVR_ENABLE   (1 << 8) /* Software enable bit */
#define	LAPIC_SPURIOUS_VECTOR   0xFF /* Spurious interrupt vector */
#define	IA32_APIC_BASE_MSR   0x1B
#define	IA32_APIC_BASE_ENABLE   (1 << 11) /* Global enable bit */
#define	IOAPIC_BASE   0xFEC00000UL
#define	IOAPIC_REGSEL   0x00 /* register select */
#define	IOAPIC_IOWIN   0x10 /* data window */
#define	IOAPIC_ID   0x00
#define	IOAPIC_VER   0x01
#define	IOAPIC_REDTBL_LO(n)
#define	IOAPIC_REDTBL_HI(n)
#define	IOAPIC_RTE_MASKED   (1 << 16) /* set to mask (disable) this IRQ line */
#define	IOAPIC_RTE_LEVEL   (1 << 15) /* 0=edge, 1=level trigger */
#define	IOAPIC_RTE_LOPOL   (1 << 13) /* 0=active-high, 1=active-low polarity */
#define	IRQ_VECTOR_BASE   32
#define	LAPIC_TIMER_PERIODIC   (1 << 17) /* LVT timer mode: periodic */
#define	LAPIC_TIMER_ONESHOT   (0 << 17) /* LVT timer mode: one-shot */
#define	LAPIC_TIMER_MASKED   (1 << 16) /* LVT: mask the timer */
#define	LAPIC_TIMER_VECTOR   48 /* IDT vector for LAPIC timer */
#define	SCHEDULER_KICK_VECTOR   50 /* IDT vector: scheduler-kick IPI from remote CPU */
#define	TLB_SHOOTDOWN_VECTOR   51 /* IDT vector: TLB-shootdown IPI broadcast */
#define	PANIC_HALT_VECTOR   52 /* IDT vector: panic-halt IPI broadcast */
#define	LAPIC_TIMER_DIVBY_16   0x3 /* DCR divide-by-16 */

Functions
void	lapic_init (void)
	Detect, identity-map, and software-enable the local APIC.
static void	lapic_write (uint32_t reg, uint32_t val)
	Write a 32-bit value to a LAPIC MMIO register.
static uint32_t	lapic_read (uint32_t reg)
	Read a 32-bit value from a LAPIC MMIO register.
static void	lapic_eoi (void)
	Signal End-of-Interrupt to the local APIC.
void	lapic_eoi_asm (void)
	Non-inline wrapper for lapic_eoi(), callable from assembly.
void	lapic_send_ipi (uint8_t target_lapic_id, uint8_t vector)
	Send a Fixed IPI to a remote CPU.
void	ioapic_init (void)
	Map and initialise the I/O APIC.
void	ioapic_mask_irq (uint8_t irq)
	Mask (disable) an I/O APIC redirection entry.
void	ioapic_unmask_irq (uint8_t irq)
	Unmask (enable) an I/O APIC redirection entry.
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.

Variables
volatile uint32_t *	lapic_base
volatile uint64_t	lapic_tick_count
uint32_t	lapic_bsp_timer_icr