apic.c File Reference

Intel 64 local APIC driver. More...

Functions
void	apic_timer_init (bool masked, bool periodic)
	Initializes the local APIC timer. More...
void	apic_perfcnt_init (void)
	Initializes performance counter overflow interrupt.
void	apic_perfcnt_stop (void)
	Initializes performance counter overflow interrupt.
void	apic_init (void)
	This function initializes the local APIC. This function initialzes the local APIC by writes to the memory mapped registers and by enabling it in the MSR.
void	apic_send_init_assert (uint8_t destination, uint8_t destination_shorthand)
	Send an INIT IPI (assert mode) This function sends an INIT IPI to the destination processor or the processors included in the shorthand in assert mode. More...
void	apic_send_init_deassert (void)
	Send an INIT IPI (de-assert mode) This function sends an INIT IPI to all processors. INIT IPIs in de-assert mode are always sent to all processors, regardless of the destination value and the destination shorthand value.
void	apic_send_start_up (uint8_t destination, uint8_t destination_shorthand, uint8_t realmode_startpage)
	Send a Start-Up IPI. More...
void	apic_send_std_ipi (uint8_t destination, uint8_t destination_shorthand, uint8_t vector)
	Send an standard IPI to the definded target APIC This function sends an standard IPI to the target APIC. More...
void	apic_eoi (void)
	This function sends an EOI to the local APIC An End-Of-Interrupt is sent to the local APIC. This function should be called at the end of an interrupt handler.
void	apic_seoi (uint8_t int_nr)
	This function sends a specific EOI to the local APIC A specific End-Of-Interrupt is sent to the local APIC. This function should be called at the end of an interrupt handler.
void	apic_mask_timer (void)
void	apic_unmask_timer (void)
void	systime_set_timeout (systime_t timeout)

Variables
uint64_t	apic_systime_frequency_ratio
	Ratio of APIC frequency to systime frequency * 2^32.
uint8_t	apic_id
bool	apic_bsp = true

Detailed Description

Intel 64 local APIC driver.

Function Documentation

void apic_mask_timer

(

void

)

Mask the timer interrupt.

void apic_send_init_assert	(	uint8_t	destination,
		uint8_t	destination_shorthand
	)

Send an INIT IPI (assert mode) This function sends an INIT IPI to the destination processor or the processors included in the shorthand in assert mode.

Parameters

destination	The destination, if shorthand = xapic_none
destination_shorthand	THe shorthand of the destination which may be xapic_none, xapic_self, xapic_all_inc or xapic_all_exc

void apic_send_start_up	(	uint8_t	destination,
		uint8_t	destination_shorthand,
		uint8_t	realmode_startpage
	)

Send a Start-Up IPI.

This function sends a Start-Up IPI to the destination processor or the processors included in the shorthand.

Parameters

destination	The destination, if shorthand = xapic_none
destination_shorthand	THe shorthand of the destination which may be xapic_none, xapic_self, xapic_all_inc or xapic_all_exc

void apic_send_std_ipi	(	uint8_t	destination,
		uint8_t	destination_shorthand,
		uint8_t	vector
	)

Send an standard IPI to the definded target APIC This function sends an standard IPI to the target APIC.

Parameters

destination	The destination, if shorthand = xapic_none
destination_shorthand	THe shorthand of the destination which may be xapic_none, xapic_self, xapic_all_inc or xapic_all_exc

void apic_timer_init	(	bool	masked,
		bool	periodic
	)

Initializes the local APIC timer.

Parameters

masked	Mask interrupt
periodic	Periodic or one-shot

void apic_unmask_timer

(

void

)

Unmask the timer interrupt.

void systime_set_timeout

(

systime_t

timeout

)

Set a point at which a timer interrupt should occur if it's in a past, trigger immediately

Variable Documentation

bool apic_bsp = true

True if we're on the BSP

uint8_t apic_id

The kernel's APIC ID.