xref: /illumos-gate/usr/src/contrib/bhyve/dev/acpica/acpi_hpet.h (revision d0b3c59ba652f183eeec1414dd9fbdc56bf05cc8)
1 /*-
2  * Copyright (c) 2005 Poul-Henning Kamp
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  *
26  * $FreeBSD: head/sys/dev/acpica/acpi_hpet.h 224919 2011-08-16 21:51:29Z mav $
27  */
28 
29 #ifndef __ACPI_HPET_H__
30 #define	__ACPI_HPET_H__
31 
32 #define HPET_MEM_WIDTH		0x400	/* Expected memory region size */
33 
34 /* General registers */
35 #define HPET_CAPABILITIES	0x0	/* General capabilities and ID */
36 #define	HPET_CAP_VENDOR_ID	0xffff0000
37 #define	HPET_CAP_LEG_RT		0x00008000
38 #define	HPET_CAP_COUNT_SIZE	0x00002000 /* 1 = 64-bit, 0 = 32-bit */
39 #define	HPET_CAP_NUM_TIM	0x00001f00
40 #define	HPET_CAP_REV_ID		0x000000ff
41 #define HPET_PERIOD		0x4	/* Period (1/hz) of timer */
42 #define HPET_CONFIG		0x10	/* General configuration register */
43 #define	HPET_CNF_LEG_RT		0x00000002
44 #define	HPET_CNF_ENABLE		0x00000001
45 #define	HPET_ISR		0x20	/* General interrupt status register */
46 #define HPET_MAIN_COUNTER	0xf0	/* Main counter register */
47 
48 /* Timer registers */
49 #define	HPET_TIMER_CAP_CNF(x)	((x) * 0x20 + 0x100)
50 #define	HPET_TCAP_INT_ROUTE	0xffffffff00000000
51 #define	HPET_TCAP_FSB_INT_DEL	0x00008000
52 #define	HPET_TCNF_FSB_EN	0x00004000
53 #define	HPET_TCNF_INT_ROUTE	0x00003e00
54 #define	HPET_TCNF_32MODE	0x00000100
55 #define	HPET_TCNF_VAL_SET	0x00000040
56 #define	HPET_TCAP_SIZE		0x00000020 /* 1 = 64-bit, 0 = 32-bit */
57 #define	HPET_TCAP_PER_INT	0x00000010 /* Supports periodic interrupts */
58 #define	HPET_TCNF_TYPE		0x00000008 /* 1 = periodic, 0 = one-shot */
59 #define	HPET_TCNF_INT_ENB	0x00000004
60 #define	HPET_TCNF_INT_TYPE	0x00000002 /* 1 = level triggered, 0 = edge */
61 #define	HPET_TIMER_COMPARATOR(x) ((x) * 0x20 + 0x108)
62 #define	HPET_TIMER_FSB_VAL(x)	((x) * 0x20 + 0x110)
63 #define	HPET_TIMER_FSB_ADDR(x)	((x) * 0x20 + 0x114)
64 
65 #define	HPET_MIN_CYCLES		128	/* Period considered reliable. */
66 
67 #endif /* !__ACPI_HPET_H__ */
68