// pic.h
// Author: Josh Holtrop
// Created: 02/26/04

#ifndef __HOS_PIC__
#define __HOS_PIC__ __HOS_PIC__

#include "hos_defines.h"
#include "sys/io.h"

#define	PIC1		0x20
#define	PIC2		0xA0
#define	PIC1_COMMAND	PIC1
#define	PIC1_DATA	(PIC1+1)
#define	PIC2_COMMAND	PIC2
#define	PIC2_DATA	(PIC2+1)
#define	PIC_EOI		0x20

#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_remap(int pic1, int pic2);
//inline void pic_mask1(byte mask);
//inline void pic_mask2(byte mask);
//inline void pic_eoi();
//inline void pic_eoi2();

//Masks interrupts on first Programmable Interrupt Controller
static inline void pic_mask1(byte mask)
{
	outportb(PIC1_DATA, mask);			//0x21, maskfield *OCW1*
}

//Masks interrupts on second Programmable Interrupt Controller
static inline void pic_mask2(byte mask)
{
 	outportb(PIC2_DATA, mask);			//0xA1, maskfield *OCW1*
}


//Signals an End Of Interrupt signal to the first PIC
static inline void pic_eoi()
{
	outportb(0x20, 0x20);
}

//Signals an End Of Interrupt signal to both the second and first PIC unit
static inline void pic_eoi2()
{
 	outportb(0xA0, 0x20);
 	outportb(0x20, 0x20);
}

#endif