#include <ipxe/io.h>

Macros
#define	PIC8259_H

#define	IRQ_PIC_CUTOFF 8

#define	PIC1_ICW1 0x20

#define	PIC1_OCW2 0x20

#define	PIC1_OCW3 0x20

#define	PIC1_ICR 0x20

#define	PIC1_IRR 0x20

#define	PIC1_ISR 0x20

#define	PIC1_ICW2 0x21

#define	PIC1_ICW3 0x21

#define	PIC1_ICW4 0x21

#define	PIC1_IMR 0x21

#define	PIC2_ICW1 0xa0

#define	PIC2_OCW2 0xa0

#define	PIC2_OCW3 0xa0

#define	PIC2_ICR 0xa0

#define	PIC2_IRR 0xa0

#define	PIC2_ISR 0xa0

#define	PIC2_ICW2 0xa1

#define	PIC2_ICW3 0xa1

#define	PIC2_ICW4 0xa1

#define	PIC2_IMR 0xa1

#define	OCW3_ID 0x08

#define	OCW3_READ_IRR 0x02

#define	OCW3_READ_ISR 0x03

#define	ICR_EOI_NON_SPECIFIC 0x20

#define	ICR_EOI_NOP 0x40

#define	ICR_EOI_SPECIFIC 0x60

#define	ICR_EOI_SET_PRIORITY 0xc0

#define	IMR_REG(x) ( (x) < IRQ_PIC_CUTOFF ? PIC1_IMR : PIC2_IMR )

#define	IMR_BIT(x) ( 1 << ( (x) % IRQ_PIC_CUTOFF ) )

#define	irq_enabled(x) ( ( inb ( IMR_REG(x) ) & IMR_BIT(x) ) == 0 )

#define	enable_irq(x) outb ( inb( IMR_REG(x) ) & ~IMR_BIT(x), IMR_REG(x) )

#define	disable_irq(x) outb ( inb( IMR_REG(x) ) \| IMR_BIT(x), IMR_REG(x) )

#define	ICR_REG(irq) ( (irq) < IRQ_PIC_CUTOFF ? PIC1_ICR : PIC2_ICR )

#define	ICR_VALUE(irq) ( (irq) % IRQ_PIC_CUTOFF )

#define	CHAINED_IRQ 2

#define	IRQ_INT(irq) ( ( ( (irq) - IRQ_PIC_CUTOFF ) ^ 0x70 ) & 0x7f )

#define	IRQ_MAX 15

#define	IRQ_NONE -1U

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)

void	send_eoi (unsigned int irq)
	Send End-Of-Interrupt to the PIC. More...

Macro Definition Documentation

◆ PIC8259_H

#define PIC8259_H

Definition at line 10 of file pic8259.h.

◆ IRQ_PIC_CUTOFF

#define IRQ_PIC_CUTOFF 8

Definition at line 14 of file pic8259.h.

◆ PIC1_ICW1

#define PIC1_ICW1 0x20

Definition at line 17 of file pic8259.h.

◆ PIC1_OCW2

#define PIC1_OCW2 0x20

Definition at line 18 of file pic8259.h.

◆ PIC1_OCW3

#define PIC1_OCW3 0x20

Definition at line 19 of file pic8259.h.

◆ PIC1_ICR

#define PIC1_ICR 0x20

Definition at line 20 of file pic8259.h.

◆ PIC1_IRR

#define PIC1_IRR 0x20

Definition at line 21 of file pic8259.h.

◆ PIC1_ISR

#define PIC1_ISR 0x20

Definition at line 22 of file pic8259.h.

◆ PIC1_ICW2

#define PIC1_ICW2 0x21

Definition at line 23 of file pic8259.h.

◆ PIC1_ICW3

#define PIC1_ICW3 0x21

Definition at line 24 of file pic8259.h.

◆ PIC1_ICW4

#define PIC1_ICW4 0x21

Definition at line 25 of file pic8259.h.

◆ PIC1_IMR

#define PIC1_IMR 0x21

Definition at line 26 of file pic8259.h.

◆ PIC2_ICW1

#define PIC2_ICW1 0xa0

Definition at line 27 of file pic8259.h.

◆ PIC2_OCW2

#define PIC2_OCW2 0xa0

Definition at line 28 of file pic8259.h.

◆ PIC2_OCW3

#define PIC2_OCW3 0xa0

Definition at line 29 of file pic8259.h.

◆ PIC2_ICR

#define PIC2_ICR 0xa0

Definition at line 30 of file pic8259.h.

◆ PIC2_IRR

#define PIC2_IRR 0xa0

Definition at line 31 of file pic8259.h.

◆ PIC2_ISR

#define PIC2_ISR 0xa0

Definition at line 32 of file pic8259.h.

◆ PIC2_ICW2

#define PIC2_ICW2 0xa1

Definition at line 33 of file pic8259.h.

◆ PIC2_ICW3

#define PIC2_ICW3 0xa1

Definition at line 34 of file pic8259.h.

◆ PIC2_ICW4

#define PIC2_ICW4 0xa1

Definition at line 35 of file pic8259.h.

◆ PIC2_IMR

#define PIC2_IMR 0xa1

Definition at line 36 of file pic8259.h.

◆ OCW3_ID

#define OCW3_ID 0x08

Definition at line 39 of file pic8259.h.

◆ OCW3_READ_IRR

#define OCW3_READ_IRR 0x02

Definition at line 40 of file pic8259.h.

◆ OCW3_READ_ISR

#define OCW3_READ_ISR 0x03

Definition at line 41 of file pic8259.h.

◆ ICR_EOI_NON_SPECIFIC

#define ICR_EOI_NON_SPECIFIC 0x20

Definition at line 42 of file pic8259.h.

◆ ICR_EOI_NOP

#define ICR_EOI_NOP 0x40

Definition at line 43 of file pic8259.h.

◆ ICR_EOI_SPECIFIC

#define ICR_EOI_SPECIFIC 0x60

Definition at line 44 of file pic8259.h.

◆ ICR_EOI_SET_PRIORITY

#define ICR_EOI_SET_PRIORITY 0xc0

Definition at line 45 of file pic8259.h.

◆ IMR_REG

#define IMR_REG ( x ) ( (x) < IRQ_PIC_CUTOFF ? PIC1_IMR : PIC2_IMR )

Definition at line 48 of file pic8259.h.

◆ IMR_BIT

#define IMR_BIT ( x ) ( 1 << ( (x) % IRQ_PIC_CUTOFF ) )

Definition at line 49 of file pic8259.h.

◆ irq_enabled

#define irq_enabled ( x ) ( ( inb ( IMR_REG(x) ) & IMR_BIT(x) ) == 0 )

Definition at line 50 of file pic8259.h.

◆ enable_irq

#define enable_irq ( x ) outb ( inb( IMR_REG(x) ) & ~IMR_BIT(x), IMR_REG(x) )

Definition at line 51 of file pic8259.h.

◆ disable_irq

#define disable_irq ( x ) outb ( inb( IMR_REG(x) ) | IMR_BIT(x), IMR_REG(x) )

Definition at line 52 of file pic8259.h.

◆ ICR_REG

#define ICR_REG ( irq ) ( (irq) < IRQ_PIC_CUTOFF ? PIC1_ICR : PIC2_ICR )

Definition at line 55 of file pic8259.h.

◆ ICR_VALUE

#define ICR_VALUE ( irq ) ( (irq) % IRQ_PIC_CUTOFF )

Definition at line 56 of file pic8259.h.

◆ CHAINED_IRQ

#define CHAINED_IRQ 2

Definition at line 57 of file pic8259.h.

◆ IRQ_INT

#define IRQ_INT ( irq ) ( ( ( (irq) - IRQ_PIC_CUTOFF ) ^ 0x70 ) & 0x7f )

Definition at line 60 of file pic8259.h.

◆ IRQ_MAX

#define IRQ_MAX 15

Definition at line 63 of file pic8259.h.

◆ IRQ_NONE

#define IRQ_NONE -1U

Definition at line 64 of file pic8259.h.

Function Documentation

◆ FILE_LICENCE()

FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL )

◆ send_eoi()

void send_eoi ( unsigned int irq )

Send End-Of-Interrupt to the PIC.

Parameters

irq	IRQ number

Definition at line 65 of file pic8259.c.

                                    {
         send_specific_eoi ( irq );
 }

References send_specific_eoi().

Referenced by undinet_open().

Macros

Functions