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      1 /*	$NetBSD: cpu_counter.h,v 1.2 2008/04/28 20:23:25 martin 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _IA64_CPU_COUNTER_H_
     33 #define _IA64_CPU_COUNTER_H_
     34 
     35 /*
     36  * Machine-specific support for CPU counter.
     37  */
     38 
     39 #ifdef _KERNEL
     40 
     41 #include <machine/ia64_cpu.h>
     42 
     43 static __inline int
     44 cpu_hascounter(void)
     45 {
     46 	return 1;
     47 }
     48 
     49 static __inline uint64_t
     50 cpu_counter(void)
     51 {
     52 	return ia64_get_itc();
     53 }
     54 
     55 static __inline uint32_t
     56 cpu_counter32(void)
     57 {
     58 	return (ia64_get_itc() & 0xffffffffUL);
     59 }
     60 
     61 static __inline uint64_t
     62 cpu_frequency(struct cpu_info *ci)
     63 {
     64 	extern uint64_t itc_frequency;
     65 
     66 	return itc_frequency;
     67 }
     68 
     69 #endif /* _KERNEL */
     70 
     71 #endif /* !_IA64_CPU_COUNTER_H_ */
     72