102 lines
3.0 KiB
C
102 lines
3.0 KiB
C
/* $Id:$ */
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/*
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* Copyright (c) 2008-2010 Aaron Turner.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the names of the copyright owners nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "config.h"
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#include "defines.h"
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#include "common.h"
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#include <sys/types.h>
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#include <sys/time.h>
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#include <unistd.h>
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#include <errno.h>
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#include <string.h>
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#ifdef HAVE_SYS_EVENT
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#include <sys/event.h>
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#endif
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/* necessary for ioport_sleep() functions */
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#ifdef HAVE_SYS_IO_H /* Linux */
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#include <sys/io.h>
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#elif defined HAVE_ARCHITECTURE_I386_PIO_H /* OS X */
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#include <architecture/i386/pio.h>
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#endif
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float gettimeofday_sleep_value;
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int ioport_sleep_value;
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void
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ioport_sleep_init(void)
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{
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#ifdef HAVE_IOPERM
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ioperm(0x80,1,1);
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ioport_sleep_value = inb(0x80);
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#else
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err(-1, "Platform does not support IO Port for timing");
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#endif
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}
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void
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ioport_sleep(const struct timespec nap)
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{
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#ifdef HAVE_IOPERM
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struct timeval nap_for;
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u_int32_t usec;
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time_t i;
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TIMESPEC_TO_TIMEVAL(&nap_for, &nap);
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/*
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* process the seconds, we do this in a loop so we don't have to
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* use slower 64bit integers or worry about integer overflows.
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*/
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for (i = 0; i < nap_for.tv_sec; i ++) {
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usec = SEC_TO_MICROSEC(nap_for.tv_sec);
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while (usec > 0) {
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usec --;
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outb(ioport_sleep_value, 0x80);
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}
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}
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/* process the usec */
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usec = nap.tv_nsec / 1000;
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usec --; /* fudge factor for all the above */
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while (usec > 0) {
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usec --;
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outb(ioport_sleep_value, 0x80);
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}
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#else
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err(-1, "Platform does not support IO Port for timing");
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#endif
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}
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