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ad 2008-05-10 17:18:48 +00:00
parent b6c10a6fe5
commit f372a4ddde
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sys/sys/cc_microtime.h
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/* $NetBSD: cc_microtime.h,v 1.6 2008/04/28 20:24:10 martin Exp $ */
/*-
* Copyright (c) 2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _SYS_CC_MICROTIME_H_
#define _SYS_CC_MICROTIME_H_
/* XXX this file is not named right - rather something like tsc.h */
void tsc_calibrate_cpu(struct cpu_info *);
/*
* Variables used by cc_microtime().
*/
struct cc_microtime_state {
volatile u_int cc_gen; /* generation number for this data set */
volatile int64_t cc_val; /* reference TSC value at calibration time */
volatile int64_t cc_cc; /* local TSC value at calibration time */
volatile int64_t cc_delta; /* reference TSC difference for
last calibration period */
volatile int64_t cc_denom; /* local TSC difference for
last calibration period */
int64_t cc_pad[3];
};
#endif /* _SYS_CC_MICROTIME_H_ */