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/*-
* Copyright (c) 1996 Bruce D. Evans.
* Copyright (c) 2002 by Thomas Moestl <tmm@FreeBSD.org>.
* 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.
*
* from: src/sys/i386/isa/prof_machdep.c,v 1.16 2000/07/04 11:25:19
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef GUPROF
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/gmon.h>
#include <sys/kernel.h>
#include <sys/sysctl.h>
#include <machine/profile.h>
int cputime_bias;
/*
* Return the time elapsed since the last call. The units are machine-
* dependent.
* XXX: this is not SMP-safe. It should use per-CPU variables; %tick can be
* used though.
*/
int
cputime(void)
{
u_long count;
static u_long prev_count;
int delta;
count = rd(tick);
delta = (int)(count - prev_count);
prev_count = count;
return (delta);
}
/*
* The start and stop routines need not be here since we turn off profiling
* before calling them. They are here for convenience.
*/
void
startguprof(struct gmonparam *gp)
{
gp->profrate = tick_freq;
cputime_bias = 0;
cputime();
}
void
stopguprof(struct gmonparam *gp)
{
/* Nothing to do. */
}
#endif /* GUPROF */
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