31 lines
1.1 KiB
C
31 lines
1.1 KiB
C
#ifndef _PIC_H
|
|
#define _PIC_H
|
|
|
|
#include <stdint.h>
|
|
#include <stddef.h>
|
|
|
|
#define PIC1 0x20 /* IO base address for master PIC */
|
|
#define PIC2 0xA0 /* IO base address for slave PIC */
|
|
#define PIC1_COMMAND PIC1
|
|
#define PIC1_DATA (PIC1+1)
|
|
#define PIC2_COMMAND PIC2
|
|
#define PIC2_DATA (PIC2+1)
|
|
#define PIC_EOI 0x20 /* End-of-interrupt command code */
|
|
#define ICW1_ICW4 0x01 /* ICW4 (not) needed */
|
|
#define ICW1_SINGLE 0x02 /* Single (cascade) mode */
|
|
#define ICW1_INTERVAL4 0x04 /* Call address interval 4 (8) */
|
|
#define ICW1_LEVEL 0x08 /* Level triggered (edge) mode */
|
|
#define ICW1_INIT 0x10 /* Initialization - required! */
|
|
|
|
#define ICW4_8086 0x01 /* 8086/88 (MCS-80/85) mode */
|
|
#define ICW4_AUTO 0x02 /* Auto (normal) EOI */
|
|
#define ICW4_BUF_SLAVE 0x08 /* Buffered mode/slave */
|
|
#define ICW4_BUF_MASTER 0x0C /* Buffered mode/master */
|
|
#define ICW4_SFNM 0x10 /* Special fully nested (not) */
|
|
|
|
void pic_send_eoi(uint8_t irq);
|
|
void pic_remap(uint8_t offset1, uint8_t offset2);
|
|
void pic_irq_set_mask(uint8_t IRQline);
|
|
void pic_irq_clear_mask(uint8_t IRQline);
|
|
|
|
#endif
|