1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD 3 * 4 * Copyright (c) 2018-2022 Intel Corporation. 5 * Copyright (c) 2014 Tycho Nightingale <tycho.nightingale@pluribusnetworks.com> 6 * Copyright (c) 2011 NetApp, Inc. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY NETAPP, INC ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL NETAPP, INC OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * $FreeBSD$ 31 */ 32 33 #ifndef _PIT_H_ 34 #define _PIT_H_ 35 36 #include "i8253reg.h" 37 #include "vmmapi.h" 38 39 #define IO_TIMER1_PORT 0x40 /* 8253 Timer #1 */ 40 #define NMISC_PORT 0x61 41 42 #define PIT_ATPIC_IRQ 0 43 #define PIT_IOAPIC_IRQ 2 44 45 /* 46 * The outputs of the three timers are connected as follows: 47 * 48 * timer 0 -> irq 0 49 * timer 1 -> dma chan 0 (for dram refresh) 50 * timer 2 -> speaker (via keyboard controller) 51 * 52 * Timer 0 is used to call hardclock. 53 * Timer 2 is used to generate console beeps. 54 */ 55 #define TIMER_CNTR0 (IO_TIMER1_PORT + TIMER_REG_CNTR0) 56 #define TIMER_CNTR1 (IO_TIMER1_PORT + TIMER_REG_CNTR1) 57 #define TIMER_CNTR2 (IO_TIMER1_PORT + TIMER_REG_CNTR2) 58 #define TIMER_MODE (IO_TIMER1_PORT + TIMER_REG_MODE) 59 60 int vpit_init(struct vmctx *ctx); 61 void vpit_deinit(struct vmctx *ctx); 62 63 #endif /* _PIT_H_ */ 64