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 BASE_ART_CLOCK_SOURCE_SP 25000000ULL /* 25MHz */ 46 #define IA32_PERF_STS 0x198 47 #define SLOW_TSC_THRESHOLD 1000067800 /* if slower, nonzero shift required in nanotime() algorithm */ 48 49 #ifndef ASSEMBLER 50 extern uint64_t busFCvtt2n; 51 extern uint64_t busFCvtn2t; 52 extern uint64_t tscFreq; 53 extern uint64_t tscFCvtt2n; 54 extern uint64_t tscFCvtn2t; 55 extern uint64_t tscGranularity; 56 extern uint64_t bus2tsc; 57 extern uint64_t busFreq; 58 extern uint32_t flex_ratio; 59 extern uint32_t flex_ratio_min; 60 extern uint32_t flex_ratio_max; 61 extern uint64_t tsc_at_boot; 62 63 struct tscInfo { 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 }; 76 typedef struct tscInfo tscInfo_t; 77 78 extern void tsc_get_info(tscInfo_t *info); 79 80 extern void tsc_init(void); 81 82 #if DEVELOPMENT || DEBUG 83 extern void cpu_data_tsc_sync_deltas_string(char *buf, uint32_t buflen, 84 uint32_t start_cpu, uint32_t end_cpu); 85 #endif 86 87 #endif /* ASSEMBLER */ 88 #endif /* _I386_TSC_H_ */ 89 #endif /* KERNEL_PRIVATE */ 90