1 /* $NetBSD: clock.c,v 1.1 2011/01/26 01:18:54 pooka 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 37 #include <stand/common/common.h> 38 39 long 40 getsecs() 41 { 42 struct _Tc *Tc = (struct _Tc *)TIMER_DEFAULT_ADDRESS; 43 uint64_t now; 44 static int inited = 0; 45 46 if (!inited) { 47 inited = 1; 48 Tc->Control = TCCT_ENABLE; 49 } 50 51 /* starts from 0 at powerup, and counts up */ 52 now = Tc->FreeRunning; 53 #if 0 54 /* requires full 64bit math support */ 55 now = now / 10*1000*1000; 56 #else 57 /* good nuf */ 58 now = now >> 23; 59 #endif 60 return (long) now; 61 } 62