Collaboration diagram for Interrupt Controller - x86:

Macros
#define	PIC_IRQ_COUNT (IRQ_ATA_SECONDARY + 1)
	The total number of IRQ.

Enumerations
enum	pic_irq { IRQ_TIMER = 0 , IRQ_KEYBOARD , IRQ_CASCADE , IRQ_COM2 , IRQ_COM1 , IRQ_LPT2 , IRQ_FLOPPY , IRQ_LPT1 , IRQ_CMOS , IRQ_FREE1 , IRQ_FREE2 , IRQ_FREE3 , IRQ_PS2 , IRQ_FPU , IRQ_ATA_PRIMARY , IRQ_ATA_SECONDARY }
	All available PIC irqs, by vector index. More...

Functions
void	pic_reset ()
	Reset the PIC. More...

void	pic_eoi (pic_irq)
	Send an End Of Interrupt command to the PIC. More...

void	pic_disable_irq (pic_irq)
	Disable the given IRQ.

void	pic_enable_irq (pic_irq)
	Enable the given IRQ.

Detailed Description

8259 Programmable Interrupt Controller (PIC)

Any interaction done with the PIC should be done through the functions defined inside this header.

This also includes the definition of the interrupt handlers for the IRQs raised by the PIC.

See also

Enumerator
IRQ_TIMER	Raised by the PIT.
IRQ_KEYBOARD	Raised by the keyboard.
IRQ_CASCADE	Used to access the second controller.
IRQ_COM2	Raised by the serial port.
IRQ_COM1	Raised by the serial port.

void pic_eoi ( pic_irq irq )

This is issued to the PIC chips at the end of an IRQ-based interrupt routine

Parameters

interrupt The interrupt request we finished treating

void pic_reset ( )

Should be called when entering protected mode.