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 BASE_ART_CLOCK_SOURCE 24000000ULL /* 24Mhz */
45#define IA32_PERF_STS 0x198
46#define SLOW_TSC_THRESHOLD 1000067800 /* if slower, nonzero shift required in nanotime() algorithm */
47
48#ifndef ASSEMBLER
49extern uint64_t busFCvtt2n;
50extern uint64_t busFCvtn2t;
51extern uint64_t tscFreq;
52extern uint64_t tscFCvtt2n;
53extern uint64_t tscFCvtn2t;
54extern uint64_t tscGranularity;
55extern uint64_t bus2tsc;
56extern uint64_t busFreq;
57extern uint32_t flex_ratio;
58extern uint32_t flex_ratio_min;
59extern uint32_t flex_ratio_max;
60extern uint64_t tsc_at_boot;
61
62struct tscInfo
63{
64 uint64_t busFCvtt2n;
65 uint64_t busFCvtn2t;
66 uint64_t tscFreq;
67 uint64_t tscFCvtt2n;
68 uint64_t tscFCvtn2t;
69 uint64_t tscGranularity;
70 uint64_t bus2tsc;
71 uint64_t busFreq;
72 uint32_t flex_ratio;
73 uint32_t flex_ratio_min;
74 uint32_t flex_ratio_max;
75};
76typedef struct tscInfo tscInfo_t;
77
78extern void tsc_get_info(tscInfo_t *info);
79
80extern void tsc_init(void);
81#endif /* ASSEMBLER */
82#endif /* _I386_TSC_H_ */
83#endif /* KERNEL_PRIVATE */
84