Home | History | Annotate | Line # | Download | only in common 
      1 /*      $NetBSD: clock.c,v 1.2 2014/02/24 22:31:56 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2010 The NetBSD Foundation, Inc.
      5  * Copyright (c) 1999 The NetBSD Foundation, Inc.
      6  * All rights reserved.
      7  *
      8  * This code was written by Alessandro Forin and Neil Pittman
      9  * at Microsoft Research and contributed to The NetBSD Foundation
     10  * by Microsoft Corporation.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     22  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     23  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     24  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     25  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     26  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     27  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     28  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     29  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     30  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     31  * POSSIBILITY OF SUCH DAMAGE.
     32  */
     33 
     34 #include <sys/types.h>
     35 #include <machine/emipsreg.h>
     36 #include <lib/libsa/net.h>
     37 
     38 #include <stand/common/common.h>
     39 
     40 satime_t
     41 getsecs(void)
     42 {
     43     struct _Tc *Tc = (struct _Tc *)TIMER_DEFAULT_ADDRESS;
     44 	uint64_t now;
     45     static int inited = 0;
     46 
     47     if (!inited) {
     48         inited = 1;
     49         Tc->Control = TCCT_ENABLE;
     50     }
     51 
     52     /* starts from 0 at powerup, and counts up */
     53 	now = Tc->FreeRunning;
     54 #if 0
     55     /* requires full 64bit math support */
     56     now = now / 10*1000*1000;
     57 #else
     58     /* good nuf */
     59     now = now >> 23;
     60 #endif
     61     return (long) now;
     62 }
     63