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/*
* Copyright (c) 1995 The University of Utah and
* the Computer Systems Laboratory at the University of Utah (CSL).
* All rights reserved.
*
* Permission to use, copy, modify and distribute this software is hereby
* granted provided that (1) source code retains these copyright, permission,
* and disclaimer notices, and (2) redistributions including binaries
* reproduce the notices in supporting documentation, and (3) all advertising
* materials mentioning features or use of this software display the following
* acknowledgement: ``This product includes software developed by the
* Computer Systems Laboratory at the University of Utah.''
*
* THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
* IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
* ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* CSL requests users of this software to return to csl-dist@cs.utah.edu any
* improvements that they make and grant CSL redistribution rights.
*
* Author: Bryan Ford, University of Utah CSL
*/
#include <mach/machine/pio.h>
#include "pic.h"
#include "i16.h"
CODE16
/* Program the PICs to use a different set of interrupt vectors.
Assumes processor I flag is off. */
void i16_pic_set_master(int base)
{
unsigned char old_mask;
/* Save the original interrupt mask. */
old_mask = inb(MASTER_OCW); PIC_DELAY();
/* Initialize the master PIC. */
outb(MASTER_ICW, PICM_ICW1); PIC_DELAY();
outb(MASTER_OCW, base); PIC_DELAY();
outb(MASTER_OCW, PICM_ICW3); PIC_DELAY();
outb(MASTER_OCW, PICM_ICW4); PIC_DELAY();
/* Restore the original interrupt mask. */
outb(MASTER_OCW, old_mask); PIC_DELAY();
}
void i16_pic_set_slave(int base)
{
unsigned char old_mask;
/* Save the original interrupt mask. */
old_mask = inb(SLAVES_OCW); PIC_DELAY();
/* Initialize the slave PIC. */
outb(SLAVES_ICW, PICS_ICW1); PIC_DELAY();
outb(SLAVES_OCW, base); PIC_DELAY();
outb(SLAVES_OCW, PICS_ICW3); PIC_DELAY();
outb(SLAVES_OCW, PICS_ICW4); PIC_DELAY();
/* Restore the original interrupt mask. */
outb(SLAVES_OCW, old_mask); PIC_DELAY();
}
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