xref: /illumos-gate/usr/src/uts/common/io/pic.c (revision 2d6eb4a5)
1*7c478bd9Sstevel@tonic-gate /*
2*7c478bd9Sstevel@tonic-gate  * CDDL HEADER START
3*7c478bd9Sstevel@tonic-gate  *
4*7c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7c478bd9Sstevel@tonic-gate  * Common Development and Distribution License, Version 1.0 only
6*7c478bd9Sstevel@tonic-gate  * (the "License").  You may not use this file except in compliance
7*7c478bd9Sstevel@tonic-gate  * with the License.
8*7c478bd9Sstevel@tonic-gate  *
9*7c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10*7c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
11*7c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
12*7c478bd9Sstevel@tonic-gate  * and limitations under the License.
13*7c478bd9Sstevel@tonic-gate  *
14*7c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
15*7c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16*7c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
17*7c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
18*7c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
19*7c478bd9Sstevel@tonic-gate  *
20*7c478bd9Sstevel@tonic-gate  * CDDL HEADER END
21*7c478bd9Sstevel@tonic-gate  */
22*7c478bd9Sstevel@tonic-gate /*
23*7c478bd9Sstevel@tonic-gate  * Copyright 1999 Sun Microsystems, Inc.  All rights reserved.
24*7c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
25*7c478bd9Sstevel@tonic-gate  */
26*7c478bd9Sstevel@tonic-gate 
27*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1990, 1991 UNIX System Laboratories, Inc.	*/
28*7c478bd9Sstevel@tonic-gate /*	Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T	*/
29*7c478bd9Sstevel@tonic-gate /*	  All Rights Reserved  	*/
30*7c478bd9Sstevel@tonic-gate 
31*7c478bd9Sstevel@tonic-gate #include <sys/types.h>
32*7c478bd9Sstevel@tonic-gate #include <sys/pic.h>
33*7c478bd9Sstevel@tonic-gate #include <sys/sunddi.h>
34*7c478bd9Sstevel@tonic-gate 
35*7c478bd9Sstevel@tonic-gate void
picsetup()36*7c478bd9Sstevel@tonic-gate picsetup()
37*7c478bd9Sstevel@tonic-gate {
38*7c478bd9Sstevel@tonic-gate 	/* initialize master first 				*/
39*7c478bd9Sstevel@tonic-gate 	/* ICW1: Edge-triggered, Cascaded, need ICW4 	*/
40*7c478bd9Sstevel@tonic-gate 	(void) outb(MCMD_PORT, PIC_ICW1BASE|PIC_NEEDICW4);
41*7c478bd9Sstevel@tonic-gate 
42*7c478bd9Sstevel@tonic-gate 	/* ICW2: start master vectors at PIC_VECTBASE 		*/
43*7c478bd9Sstevel@tonic-gate 	(void) outb(MIMR_PORT, PIC_VECTBASE);
44*7c478bd9Sstevel@tonic-gate 
45*7c478bd9Sstevel@tonic-gate 	/* ICW3: define which lines are connected to slaves 	*/
46*7c478bd9Sstevel@tonic-gate 	(void) outb(MIMR_PORT, 1 << MASTERLINE);
47*7c478bd9Sstevel@tonic-gate 
48*7c478bd9Sstevel@tonic-gate 	/* ICW4: buffered master (?), norm eoi, mcs 86 		*/
49*7c478bd9Sstevel@tonic-gate 	(void) outb(MIMR_PORT, PIC_86MODE);
50*7c478bd9Sstevel@tonic-gate 
51*7c478bd9Sstevel@tonic-gate 	/* OCW1: Start the master with all interrupts off 	*/
52*7c478bd9Sstevel@tonic-gate 	(void) outb(MIMR_PORT, 0xFF);
53*7c478bd9Sstevel@tonic-gate 
54*7c478bd9Sstevel@tonic-gate 	/* OCW3: set master into "read isr mode" 		*/
55*7c478bd9Sstevel@tonic-gate 	(void) outb(MCMD_PORT, PIC_READISR);
56*7c478bd9Sstevel@tonic-gate 
57*7c478bd9Sstevel@tonic-gate 	/* initialize the slave 				*/
58*7c478bd9Sstevel@tonic-gate 	/* ICW1: Edge-triggered, Cascaded, need ICW4 	*/
59*7c478bd9Sstevel@tonic-gate 	(void) outb(SCMD_PORT, PIC_ICW1BASE|PIC_NEEDICW4);
60*7c478bd9Sstevel@tonic-gate 
61*7c478bd9Sstevel@tonic-gate 	/* ICW2: set base of vectors 				*/
62*7c478bd9Sstevel@tonic-gate 	outb(SIMR_PORT, PIC_VECTBASE +  8);
63*7c478bd9Sstevel@tonic-gate 
64*7c478bd9Sstevel@tonic-gate 	/* ICW3: specify ID for this slave 			*/
65*7c478bd9Sstevel@tonic-gate 	outb(SIMR_PORT, MASTERLINE);
66*7c478bd9Sstevel@tonic-gate 
67*7c478bd9Sstevel@tonic-gate 	/* ICW4: buffered slave (?), norm eoi, mcs 86 		*/
68*7c478bd9Sstevel@tonic-gate 	outb(SIMR_PORT, PIC_86MODE);
69*7c478bd9Sstevel@tonic-gate 
70*7c478bd9Sstevel@tonic-gate 	/* OCW1: set interrupt mask 				*/
71*7c478bd9Sstevel@tonic-gate 	outb(SIMR_PORT, 0xff);
72*7c478bd9Sstevel@tonic-gate 
73*7c478bd9Sstevel@tonic-gate 	/* OCW3: set pic into "read isr mode" 			*/
74*7c478bd9Sstevel@tonic-gate 	outb(SCMD_PORT, PIC_READISR);
75*7c478bd9Sstevel@tonic-gate }
76