1*3446Smrj /* 2*3446Smrj * CDDL HEADER START 3*3446Smrj * 4*3446Smrj * The contents of this file are subject to the terms of the 5*3446Smrj * Common Development and Distribution License (the "License"). 6*3446Smrj * You may not use this file except in compliance with the License. 7*3446Smrj * 8*3446Smrj * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9*3446Smrj * or http://www.opensolaris.org/os/licensing. 10*3446Smrj * See the License for the specific language governing permissions 11*3446Smrj * and limitations under the License. 12*3446Smrj * 13*3446Smrj * When distributing Covered Code, include this CDDL HEADER in each 14*3446Smrj * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15*3446Smrj * If applicable, add the following below this CDDL HEADER, with the 16*3446Smrj * fields enclosed by brackets "[]" replaced with your own identifying 17*3446Smrj * information: Portions Copyright [yyyy] [name of copyright owner] 18*3446Smrj * 19*3446Smrj * CDDL HEADER END 20*3446Smrj */ 21*3446Smrj 22*3446Smrj /* 23*3446Smrj * Copyright 2007 Sun Microsystems, Inc. All rights reserved. 24*3446Smrj * Use is subject to license terms. 25*3446Smrj */ 26*3446Smrj 27*3446Smrj /* Copyright (c) 1990, 1991 UNIX System Laboratories, Inc. */ 28*3446Smrj /* Copyright (c) 1984, 1986, 1987, 1988, 1989, 1990 AT&T */ 29*3446Smrj /* All Rights Reserved */ 30*3446Smrj 31*3446Smrj #pragma ident "%Z%%M% %I% %E% SMI" 32*3446Smrj 33*3446Smrj #include <sys/param.h> 34*3446Smrj #include <sys/time.h> 35*3446Smrj #include <sys/systm.h> 36*3446Smrj #include <sys/archsystm.h> 37*3446Smrj #include <sys/lockstat.h> 38*3446Smrj 39*3446Smrj #include <sys/clock.h> 40*3446Smrj #include <sys/debug.h> 41*3446Smrj #include <sys/smp_impldefs.h> 42*3446Smrj #include <sys/rtc.h> 43*3446Smrj 44*3446Smrj /* 45*3446Smrj * This file contains all generic part of clock and timer handling. 46*3446Smrj * Specifics are now in separate files and may be overridden by TOD 47*3446Smrj * modules. 48*3446Smrj */ 49*3446Smrj unsigned int microdata = 50; /* loop count for 10 microsecond wait. */ 50*3446Smrj /* MUST be initialized for those who */ 51*3446Smrj /* insist on calling "tenmicrosec" before */ 52*3446Smrj /* the clock has been initialized. */ 53*3446Smrj 54*3446Smrj char *tod_module_name; /* Settable in /etc/system */ 55*3446Smrj 56*3446Smrj /* 57*3446Smrj * Write the specified time into the clock chip. 58*3446Smrj * Must be called with tod_lock held. 59*3446Smrj */ 60*3446Smrj void 61*3446Smrj tod_set(timestruc_t ts) 62*3446Smrj { 63*3446Smrj ASSERT(MUTEX_HELD(&tod_lock)); 64*3446Smrj 65*3446Smrj /* 66*3446Smrj * Prevent false alarm in tod_validate() due to tod value change. 67*3446Smrj */ 68*3446Smrj tod_fault_reset(); 69*3446Smrj TODOP_SET(tod_ops, ts); 70*3446Smrj } 71*3446Smrj 72*3446Smrj /* 73*3446Smrj * Read the current time from the clock chip and convert to UNIX form. 74*3446Smrj * Assumes that the year in the clock chip is valid. 75*3446Smrj * Must be called with tod_lock held. 76*3446Smrj */ 77*3446Smrj timestruc_t 78*3446Smrj tod_get(void) 79*3446Smrj { 80*3446Smrj timestruc_t ts; 81*3446Smrj 82*3446Smrj ASSERT(MUTEX_HELD(&tod_lock)); 83*3446Smrj 84*3446Smrj ts = TODOP_GET(tod_ops); 85*3446Smrj ts.tv_sec = tod_validate(ts.tv_sec); 86*3446Smrj return (ts); 87*3446Smrj } 88*3446Smrj 89*3446Smrj /* 90*3446Smrj * The following wrappers have been added so that locking 91*3446Smrj * can be exported to platform-independent clock routines 92*3446Smrj * (ie adjtime(), clock_setttime()), via a functional interface. 93*3446Smrj */ 94*3446Smrj int 95*3446Smrj hr_clock_lock(void) 96*3446Smrj { 97*3446Smrj ushort_t s; 98*3446Smrj 99*3446Smrj CLOCK_LOCK(&s); 100*3446Smrj return (s); 101*3446Smrj } 102*3446Smrj 103*3446Smrj void 104*3446Smrj hr_clock_unlock(int s) 105*3446Smrj { 106*3446Smrj CLOCK_UNLOCK(s); 107*3446Smrj } 108*3446Smrj 109*3446Smrj /* 110*3446Smrj * Support routines for horrid GMT lag handling 111*3446Smrj */ 112*3446Smrj 113*3446Smrj static time_t gmt_lag; /* offset in seconds of gmt to local time */ 114*3446Smrj 115*3446Smrj void 116*3446Smrj sgmtl(time_t arg) 117*3446Smrj { 118*3446Smrj gmt_lag = arg; 119*3446Smrj } 120*3446Smrj 121*3446Smrj time_t 122*3446Smrj ggmtl(void) 123*3446Smrj { 124*3446Smrj return (gmt_lag); 125*3446Smrj } 126*3446Smrj 127*3446Smrj /* rtcsync() - set 'time', assuming RTC and GMT lag are correct */ 128*3446Smrj 129*3446Smrj void 130*3446Smrj rtcsync(void) 131*3446Smrj { 132*3446Smrj timestruc_t ts; 133*3446Smrj 134*3446Smrj mutex_enter(&tod_lock); 135*3446Smrj ts = TODOP_GET(tod_ops); 136*3446Smrj set_hrestime(&ts); 137*3446Smrj mutex_exit(&tod_lock); 138*3446Smrj } 139