StdLib/Include/Ipf/machine/cpu_counter.h

   1 /*      $NetBSD: cpu_counter.h,v 1.1 2006/09/20 13:33:04 kochi Exp $    */
   2
   3 /*-
   4  * Copyright (c) 2006 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Takayoshi Kochi.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  * 3. All advertising materials mentioning features or use of this software
  19  *    must display the following acknowledgement:
  20  *        This product includes software developed by the NetBSD
  21  *        Foundation, Inc. and its contributors.
  22  * 4. Neither the name of The NetBSD Foundation nor the names of its
  23  *    contributors may be used to endorse or promote products derived
  24  *    from this software without specific prior written permission.
  25  *
  26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  36  * POSSIBILITY OF SUCH DAMAGE.
  37  */
  38
  39 #ifndef _IA64_CPU_COUNTER_H_
  40 #define _IA64_CPU_COUNTER_H_
  41
  42 /*
  43  * Machine-specific support for CPU counter.
  44  */
  45
  46 #ifdef _KERNEL
  47
  48 #include <machine/ia64_cpu.h>
  49
  50 static __inline int
  51 cpu_hascounter(void)
  52 {
  53         return 1;
  54 }
  55
  56 static __inline uint64_t
  57 cpu_counter(void)
  58 {
  59         return ia64_get_itc();
  60 }
  61
  62 static __inline uint32_t
  63 cpu_counter32(void)
  64 {
  65         return (ia64_get_itc() & 0xffffffffUL);
  66 }
  67
  68 static __inline uint64_t
  69 cpu_frequency(struct cpu_info *ci)
  70 {
  71         extern uint64_t itc_frequency;
  72
  73         return itc_frequency;
  74 }
  75
  76 #endif /* _KERNEL */
  77
  78 #endif /* !_IA64_CPU_COUNTER_H_ */