int.c

#include "head.h"


extern struct FIFO8 keyfifo;
extern struct FIFO8 mousefifo;

void init_pic(void)
{
	io_out8(PIC0_IMR, 0xff);
	io_out8(PIC1_IMR, 0xff);

	io_out8(PIC0_ICW1, 0x11);
	io_out8(PIC0_ICW2, 0x20);
	io_out8(PIC0_ICW3, 1<<2);
	io_out8(PIC0_ICW4, 0x01);

	io_out8(PIC1_ICW1, 0x11);
	io_out8(PIC1_ICW2, 0x28);
	io_out8(PIC1_ICW3, 2);
	io_out8(PIC1_ICW4, 0x01);

	io_out8(PIC0_IMR, 0xfb);
	io_out8(PIC1_IMR, 0xff);

	// keybuf.next_r = keybuf.next_w = keybuf.len = 0;

	return;
}



void inthandler21(int *esp)  //process keyboard int
{
	unsigned char data;
	io_out8(PIC0_OCW2, 0x61);
	data=io_in8(PORT_KEYDAT);
	fifo8_put(&keyfifo, data);
	
	return;
}

void inthandler2c(int *esp)		//process mouse int
{
	unsigned char data;
	io_out8(PIC1_OCW2, 0x64);
	io_out8(PIC0_OCW2, 0x62);
	data=io_in8(PORT_KEYDAT);
	fifo8_put(&mousefifo, data);
	return;
}

void inthandler27(int *esp)
{
	io_out8(PIC0_OCW2, 0x67); 
	return;
}