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* Copyright (c) 2004-2007 Apple Inc. All rights reserved.
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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* This file contains Original Code and/or Modifications of Original Code
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* Version 2.0 (the 'License'). You may not use this file except in
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* Please obtain a copy of the License at
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/*
* @OSF_COPYRIGHT@
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/*
* @APPLE_FREE_COPYRIGHT@
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/*
* File: tsc.h
* Purpose: Contains the TSC initialization and conversion
* factors.
*/
#ifdef KERNEL_PRIVATE
#ifndef _I386_TSC_H_
#define _I386_TSC_H_
#define BASE_NHM_CLOCK_SOURCE 133333333ULL
#define BASE_ART_CLOCK_SOURCE 24000000ULL /* 24MHz */
#define BASE_ART_CLOCK_SOURCE_SP 25000000ULL /* 25MHz */
#define IA32_PERF_STS 0x198
#define SLOW_TSC_THRESHOLD 1000067800 /* if slower, nonzero shift required in nanotime() algorithm */
#ifndef ASSEMBLER
extern uint64_t busFCvtt2n;
extern uint64_t busFCvtn2t;
extern uint64_t tscFreq;
extern uint64_t tscFCvtt2n;
extern uint64_t tscFCvtn2t;
extern uint64_t tscGranularity;
extern uint64_t bus2tsc;
extern uint64_t busFreq;
extern uint32_t flex_ratio;
extern uint32_t flex_ratio_min;
extern uint32_t flex_ratio_max;
extern uint64_t tsc_at_boot;
struct tscInfo {
uint64_t busFCvtt2n;
uint64_t busFCvtn2t;
uint64_t tscFreq;
uint64_t tscFCvtt2n;
uint64_t tscFCvtn2t;
uint64_t tscGranularity;
uint64_t bus2tsc;
uint64_t busFreq;
uint32_t flex_ratio;
uint32_t flex_ratio_min;
uint32_t flex_ratio_max;
};
typedef struct tscInfo tscInfo_t;
extern void tsc_get_info(tscInfo_t *info);
extern void tsc_init(void);
#if DEVELOPMENT || DEBUG
extern void cpu_data_tsc_sync_deltas_string(char *buf, uint32_t buflen,
uint32_t start_cpu, uint32_t end_cpu);
#endif
#endif /* ASSEMBLER */
#endif /* _I386_TSC_H_ */
#endif /* KERNEL_PRIVATE */