ppireg.h revision 330897 
1/*-
2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
3 *
4 * Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 *
27 * $FreeBSD: stable/11/sys/amd64/include/ppireg.h 330897 2018-03-14 03:19:51Z eadler $
28 */
29
30#ifndef _MACHINE_PPIREG_H_
31#define _MACHINE_PPIREG_H_
32
33#ifdef _KERNEL
34
35#define	IO_PPI		0x61	/* Programmable Peripheral Interface */
36
37/*
38 * PPI speaker control values
39 */
40
41#define	PIT_ENABLETMR2	0x01	/* Enable timer/counter 2 */
42#define	PIT_SPKRDATA	0x02	/* Direct to speaker */
43
44#define	PIT_SPKR	(PIT_ENABLETMR2 | PIT_SPKRDATA)
45
46#define	ppi_spkr_on()	outb(IO_PPI, inb(IO_PPI) | PIT_SPKR)
47#define	ppi_spkr_off()	outb(IO_PPI, inb(IO_PPI) & ~PIT_SPKR)
48
49#endif /* _KERNEL */
50
51#endif /* _MACHINE_PPIREG_H_ */
52