73 lines
2.2 KiB
C
73 lines
2.2 KiB
C
/* $NetBSD: cpu_counter.h,v 1.6 2020/07/26 08:08:41 simonb Exp $ */
|
|
|
|
/*
|
|
* Copyright (c) 2000 Soren S. Jorvang. 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 AUTHOR 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 AUTHOR 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 _MIPS_CPU_COUNTER_H_
|
|
#define _MIPS_CPU_COUNTER_H_
|
|
|
|
/*
|
|
* Machine-specific support for CPU counter.
|
|
*/
|
|
|
|
#ifdef _KERNEL
|
|
#if __mips < 3
|
|
#include <mips/locore.h>
|
|
#endif
|
|
|
|
static __inline int
|
|
cpu_hascounter(void)
|
|
{
|
|
/*
|
|
* MIPS III and MIPS IV CPU's have a cycle counter
|
|
* running at half the internal pipeline rate.
|
|
*/
|
|
#if __mips >= 3
|
|
return 1;
|
|
#elif !defined(__mips_o32) || defined(MIPS3_PLUS)
|
|
return (MIPS_HAS_CLOCK);
|
|
#else
|
|
return 0;
|
|
#endif
|
|
}
|
|
|
|
#if __mips >= 3 || !defined(__mips_o32) || defined(MIPS3_PLUS)
|
|
#define cpu_counter() cpu_counter32()
|
|
|
|
uint32_t cpu_counter32(void); /* weak alias of mips3_cp0_count_read */
|
|
#else
|
|
#define cpu_counter() (0)
|
|
#define cpu_counter32() (0)
|
|
#endif
|
|
|
|
static __inline uint64_t
|
|
cpu_frequency(struct cpu_info *ci)
|
|
{
|
|
return ci->ci_cctr_freq;
|
|
}
|
|
|
|
#endif /* _KERNEL */
|
|
#endif /* !_MIPS_CPU_COUNTER_H_ */
|