1 /* $NetBSD: cctr.h,v 1.3 2008/04/28 20:24:10 martin Exp $ */ 2 3 /*- 4 * Copyright (c) 2004 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #ifndef _SYS_CCTR_H_ 30 #define _SYS_CCTR_H_ 31 32 #include <sys/timetc.h> 33 34 /* 35 * Variables used by cycle counter in kern_cctr.c. 36 */ 37 struct cctr_state { 38 volatile u_int cc_gen; /* generation number for this data set */ 39 volatile int64_t cc_val; /* reference CC value at calibration time */ 40 volatile int64_t cc_cc; /* local CC value at calibration time */ 41 volatile int64_t cc_delta; /* reference CC difference for 42 last calibration period */ 43 volatile int64_t cc_denom; /* local CC difference for 44 last calibration period */ 45 }; 46 47 struct cpu_info; 48 49 void cc_calibrate_cpu(struct cpu_info *); 50 struct timecounter *cc_init(timecounter_get_t, uint64_t, const char *, int); 51 u_int cc_get_timecount(struct timecounter *); 52 53 #endif /* _SYS_CCTR_H_ */ 54