56 lines
1.6 KiB
C
56 lines
1.6 KiB
C
#ifndef SHADE_PIC_H
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#define SHADE_PIC_H
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#include <stdint.h>
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#define PIC1 0x20 /* IO base address for master PIC */
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#define PIC2 0xA0 /* IO base address for slave PIC */
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#define PIC1_COMMAND PIC1
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#define PIC1_DATA (PIC1+1)
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#define PIC2_COMMAND PIC2
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#define PIC2_DATA (PIC2+1)
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#define PIC_EOI 0x20 /* End-of-interrupt command code */
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#define ICW1_ICW4 0x01 /* ICW4 (not) needed */
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#define ICW1_SINGLE 0x02 /* Single (cascade) mode */
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#define ICW1_INTERVAL4 0x04 /* Call address interval 4 (8) */
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#define ICW1_LEVEL 0x08 /* Level triggered (edge) mode */
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#define ICW1_INIT 0x10 /* Initialization - required! */
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#define ICW4_8086 0x01 /* 8086/88 (MCS-80/85) mode */
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#define ICW4_AUTO 0x02 /* Auto (normal) EOI */
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#define ICW4_BUF_SLAVE 0x08 /* Buffered mode/slave */
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#define ICW4_BUF_MASTER 0x0C /* Buffered mode/master */
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#define ICW4_SFNM 0x10 /* Special fully nested (not) */
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#define PIC_READ_IRR 0x0a /* OCW3 irq ready next CMD read */
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#define PIC_READ_ISR 0x0b /* OCW3 irq service next CMD read */
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#define IRQ_PIT 0
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#define IRQ_KEYBOARD 1
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#define IRQ_INTERNAL 2
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#define IRQ_COM2 3
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#define IRQ_COM1 4
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#define IRQ_LPT2 5
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#define IRQ_FLOPPY 6
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#define IRQ_LPT1 7
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#define IRQ_CMOS 8
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#define IRQ_UNUSED 9
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#define IRQ_UNUSED 10
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#define IRQ_UNUSED 11
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#define IRQ_PS2_MOUSE 12
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#define IRQ_FPU 13
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#define IRQ_ATA_PRIMARY 14
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#define IRQ_ATA_SECONDARY 15
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void pic_send_eoi(uint8_t irq);
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void pic_remap(int offset1, int offset2);
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void pic_mask_irq(uint8_t irq);
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void pic_unmask_irq(uint8_t irq);
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static uint16_t __pic_get_irq_reg(int ocw3);
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uint16_t pic_get_irr();
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uint16_t pic_get_isr();
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#endif |