49 lines
1.8 KiB
C
49 lines
1.8 KiB
C
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/*-
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* Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _MACHINE_PPIREG_H_
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#define _MACHINE_PPIREG_H_
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#ifdef _KERNEL
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#define IO_PPI 0x35 /* Programmable Peripheral Interface */
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/*
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* PPI speaker control values
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*/
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#define PIT_ENABLETMR1 0x08 /* Enable timer/counter 1 */
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#define PIT_SPKR (PIT_ENABLETMR1)
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#define ppi_spkr_on() outb(IO_PPI, inb(IO_PPI) & ~PIT_SPKR)
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#define ppi_spkr_off() outb(IO_PPI, inb(IO_PPI) | PIT_SPKR)
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#endif /* _KERNEL */
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#endif /* _MACHINE_PPIREG_H_ */
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