FreeBSD/Linux Kernel Cross Reference
sys/sparc64/sparc64/prof_machdep.c

     /*-
      * 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
     *
     * $FreeBSD$
     */
    
    #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;
            int delta;
            static u_long prev_count;
    
            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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