1/*
2 * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * @OSF_COPYRIGHT@
30 */
31/*
32 * @APPLE_FREE_COPYRIGHT@
33 */
34/*
35 *	File:		tsc.h
36 *	Purpose:	Contains the TSC initialization and conversion
37 *			factors.
38 */
39#ifdef KERNEL_PRIVATE
40#ifndef _I386_TSC_H_
41#define _I386_TSC_H_
42
43#define BASE_NHM_CLOCK_SOURCE 	133333333ULL
44#define IA32_PERF_STS		0x198
45#define	SLOW_TSC_THRESHOLD	1000067800	/* if slower, nonzero shift required in nanotime() algorithm */
46
47#ifndef ASSEMBLER
48extern uint64_t	busFCvtt2n;
49extern uint64_t	busFCvtn2t;
50extern uint64_t tscFreq;
51extern uint64_t tscFCvtt2n;
52extern uint64_t tscFCvtn2t;
53extern uint64_t tscGranularity;
54extern uint64_t bus2tsc;
55extern uint64_t busFreq;
56extern uint32_t	flex_ratio;
57extern uint32_t	flex_ratio_min;
58extern uint32_t	flex_ratio_max;
59
60struct tscInfo
61{
62	uint64_t	busFCvtt2n;
63	uint64_t	busFCvtn2t;
64	uint64_t	tscFreq;
65	uint64_t	tscFCvtt2n;
66	uint64_t	tscFCvtn2t;
67	uint64_t	tscGranularity;
68	uint64_t	bus2tsc;
69	uint64_t	busFreq;
70	uint32_t	flex_ratio;
71	uint32_t	flex_ratio_min;
72	uint32_t	flex_ratio_max;
73};
74typedef struct tscInfo tscInfo_t;
75
76extern void tsc_get_info(tscInfo_t *info);
77
78extern void tsc_init(void);
79#endif /* ASSEMBLER */
80#endif /* _I386_TSC_H_ */
81#endif /* KERNEL_PRIVATE */
82