66 lines
1.6 KiB
C
66 lines
1.6 KiB
C
// pic.h
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// Author: Josh Holtrop
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// Created: 02/26/04
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#ifndef __HOS_PIC__
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#define __HOS_PIC__ __HOS_PIC__
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#include "hos_defines.h"
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#include "sys/io.h"
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#define PIC1 0x20
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#define PIC2 0xA0
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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
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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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void pic_remap(int pic1, int pic2);
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//inline void pic_mask1(byte mask);
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//inline void pic_mask2(byte mask);
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//inline void pic_eoi();
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//inline void pic_eoi2();
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//Masks interrupts on first Programmable Interrupt Controller
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static inline void pic_mask1(byte mask)
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{
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outportb(PIC1_DATA, mask); //0x21, maskfield *OCW1*
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}
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//Masks interrupts on second Programmable Interrupt Controller
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static inline void pic_mask2(byte mask)
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{
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outportb(PIC2_DATA, mask); //0xA1, maskfield *OCW1*
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}
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//Signals an End Of Interrupt signal to the first PIC
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static inline void pic_eoi()
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{
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outportb(0x20, 0x20);
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}
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//Signals an End Of Interrupt signal to both the second and first PIC unit
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static inline void pic_eoi2()
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{
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outportb(0xA0, 0x20);
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outportb(0x20, 0x20);
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}
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#endif
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