66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
|
/*-
|
||
|
|
* Copyright (C) 2005 TAKAHASHI Yoshihiro. All rights reserved.
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or without
|
||
|
|
* modification, are permitted provided that the following conditions
|
||
|
|
* are met:
|
||
|
|
* 1. Redistributions of source code must retain the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer.
|
||
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
||
|
|
* notice, this list of conditions and the following disclaimer in the
|
||
|
|
* documentation and/or other materials provided with the distribution.
|
||
|
|
*
|
||
|
|
* THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
||
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE
|
||
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||
|
|
* SUCH DAMAGE.
|
||
|
|
*
|
||
|
|
* $FreeBSD$
|
||
|
|
*/
|
||
|
|
|
||
|
|
/*
|
||
|
|
* The outputs of the three timers are connected as follows:
|
||
|
|
*
|
||
|
|
* timer 0 -> irq 0
|
||
|
|
* timer 1 -> dma chan 0 (for dram refresh)
|
||
|
|
* timer 2 -> speaker (via keyboard controller)
|
||
|
|
*
|
||
|
|
* Timer 0 is used to call hardclock.
|
||
|
|
* Timer 2 is used to generate console beeps.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef _MACHINE_TIMERREG_H_
|
||
|
|
#define _MACHINE_TIMERREG_H_
|
||
|
|
|
||
|
|
#ifdef _KERNEL
|
||
|
|
|
||
|
|
#include <dev/ic/i8253reg.h>
|
||
|
|
|
||
|
|
#define IO_TIMER1 0x40 /* 8253 Timer #1 */
|
||
|
|
#define TIMER_CNTR0 (IO_TIMER1 + TIMER_REG_CNTR0)
|
||
|
|
#define TIMER_CNTR1 (IO_TIMER1 + TIMER_REG_CNTR1)
|
||
|
|
#define TIMER_CNTR2 (IO_TIMER1 + TIMER_REG_CNTR2)
|
||
|
|
#define TIMER_MODE (IO_TIMER1 + TIMER_REG_MODE)
|
||
|
|
|
||
|
|
#define timer_spkr_acquire() \
|
||
|
|
acquire_timer2(TIMER_SEL2 | TIMER_SQWAVE | TIMER_16BIT)
|
||
|
|
#define timer_spkr_release() \
|
||
|
|
release_timer2()
|
||
|
|
|
||
|
|
#define spkr_set_pitch(pitch) \
|
||
|
|
do { \
|
||
|
|
outb(TIMER_CNTR2, (pitch) & 0xff); \
|
||
|
|
outb(TIMER_CNTR2, (pitch) >> 8); \
|
||
|
|
} while(0)
|
||
|
|
|
||
|
|
#endif /* _KERNEL */
|
||
|
|
|
||
|
|
#endif /* _MACHINE_TIMERREG_H_ */
|