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