timex.h

microwindows移植到S3C44B0的源码

/*
 * timex.h:
 *         System clock frequency.
 * copyright:
 *         (C) 2001 RidgeRun, Inc. (http://www.ridgerun.com)
 * author: Gordon McNutt <[e-mail]>
 *
 * This program is free software; you can redistribute  it and/or modify it
 * under  the terms of  the GNU General  Public License as published by the
 * Free Software Foundation;  either version 2 of the  License, or (at your
 * option) any later version.
 *
 * THIS  SOFTWARE  IS PROVIDED   ``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  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.
 *
 * You should have received a copy of the  GNU General Public License along
 * with this program; if not, write  to the Free Software Foundation, Inc.,
 * 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */
#ifndef __ASM_ARCH_TIMEX_H__
#define __ASM_ARCH_TIMEX_H__

/*
 * CLOCK_TICK_RATE -- frequency fed to the timer. Used to
 * compute LATCH. LATCH is the number of clock ticks per timer interrupt.
 * (See linux/timex.h, armnommu/mach-dsc21/time.c).
 * defines taken from the 2.0.38 port, include/linux/timex.h --rp
 */

#ifndef __arm__
#define CLOCK_TICK_RATE	1193180 /* Underlying HZ */
#define CLOCK_TICK_FACTOR	20	/* Factor of both 1000000 and CLOCK_TICK_RATE */
#else
#define CLOCK_TICK_RATE		2000000
#define CLOCK_TICK_FACTOR	1000000
#endif

#endif /* __ASM_ARCH_TIMEX_H__ */