text: /*
   * Copyright (c) 2004-2007 Apple Inc. All rights reserved.
   *
   * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   *
   * This file contains Original Code and/or Modifications of Original Code
   * as defined in and that are subject to the Apple Public Source License
   * Version 2.0 (the 'License'). You may not use this file except in
   * compliance with the License. The rights granted to you under the License
   * may not be used to create, or enable the creation or redistribution of,
   * unlawful or unlicensed copies of an Apple operating system, or to
   * circumvent, violate, or enable the circumvention or violation of, any
   * terms of an Apple operating system software license agreement.
   *
   * Please obtain a copy of the License at
   * http://www.opensource.apple.com/apsl/ and read it before using this file.
   *
   * The Original Code and all software distributed under the License are
   * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
   * Please see the License for the specific language governing rights and
   * limitations under the License.
   *
   * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
   */
  /*
   * @OSF_COPYRIGHT@
   */
  /*
   * @APPLE_FREE_COPYRIGHT@
   */
  /*
   *	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);
  #endif /* ASSEMBLER */
  #endif /* _I386_TSC_H_ */
  #endif /* KERNEL_PRIVATE */
  