1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997, 1999-2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 28 #pragma ident "%Z%%M% %I% %E% SMI" 29 30 /* 31 * tod driver module for Starfire 32 * This module implements a soft tod since 33 * starfire has no tod part. 34 */ 35 36 #include <sys/types.h> 37 #include <sys/param.h> 38 #include <sys/sysmacros.h> 39 #include <sys/systm.h> 40 #include <sys/errno.h> 41 #include <sys/modctl.h> 42 #include <sys/autoconf.h> 43 #include <sys/debug.h> 44 #include <sys/clock.h> 45 #include <sys/cmn_err.h> 46 #include <sys/promif.h> 47 #include <sys/cpuvar.h> 48 #include <sys/cpu_sgnblk_defs.h> 49 #include <starfire/sys/cpu_sgn.h> 50 51 static timestruc_t todsf_get(void); 52 static void todsf_set(timestruc_t); 53 static uint_t todsf_set_watchdog_timer(uint_t); 54 static uint_t todsf_clear_watchdog_timer(void); 55 static void todsf_set_power_alarm(timestruc_t); 56 static void todsf_clear_power_alarm(void); 57 static uint64_t todsf_get_cpufrequency(void); 58 59 extern timestruc_t hrestime; 60 61 /* 62 * Module linkage information for the kernel. 63 */ 64 static struct modlmisc modlmisc = { 65 &mod_miscops, "Soft tod module for Starfire %I%" 66 }; 67 68 static struct modlinkage modlinkage = { 69 MODREV_1, (void *)&modlmisc, NULL 70 }; 71 72 int 73 _init(void) 74 { 75 if (strcmp(tod_module_name, "todstarfire") == 0) { 76 int ssp_time32; 77 char obp_string[40]; 78 79 /* Set the string to pass to OBP */ 80 (void) sprintf(obp_string, "h# %p unix-gettod", 81 (void *)&ssp_time32); 82 83 /* Get OBP to get TOD from ssp */ 84 prom_interpret(obp_string, 0, 0, 0, 0, 0); 85 86 hrestime.tv_sec = (time_t)ssp_time32; 87 88 tod_ops.tod_get = todsf_get; 89 tod_ops.tod_set = todsf_set; 90 tod_ops.tod_set_watchdog_timer = todsf_set_watchdog_timer; 91 tod_ops.tod_clear_watchdog_timer = todsf_clear_watchdog_timer; 92 tod_ops.tod_set_power_alarm = todsf_set_power_alarm; 93 tod_ops.tod_clear_power_alarm = todsf_clear_power_alarm; 94 tod_ops.tod_get_cpufrequency = todsf_get_cpufrequency; 95 96 /* 97 * Flag warning if user tried to use hardware watchdog 98 */ 99 if (watchdog_enable) { 100 cmn_err(CE_WARN, "Hardware watchdog unavailable"); 101 } 102 } 103 104 return (mod_install(&modlinkage)); 105 } 106 107 int 108 _fini(void) 109 { 110 if (strcmp(tod_module_name, "todstarfire") == 0) 111 return (EBUSY); 112 else 113 return (mod_remove(&modlinkage)); 114 } 115 116 int 117 _info(struct modinfo *modinfop) 118 { 119 return (mod_info(&modlinkage, modinfop)); 120 } 121 122 123 /* 124 * Simply return hrestime value 125 * Must be called with tod_lock held. 126 */ 127 static timestruc_t 128 todsf_get(void) 129 { 130 timestruc_t ts; 131 extern cpu_sgnblk_t *cpu_sgnblkp[]; 132 133 ASSERT(MUTEX_HELD(&tod_lock)); 134 135 ts = hrestime; 136 137 /* Update the heartbeat */ 138 if (cpu_sgnblkp[CPU->cpu_id] != NULL) 139 cpu_sgnblkp[CPU->cpu_id]->sigb_heartbeat++; 140 return (ts); 141 } 142 143 /* 144 * Null function for now. 145 * Must be called with tod_lock held. 146 */ 147 /* ARGSUSED */ 148 static void 149 todsf_set(timestruc_t ts) 150 { 151 ASSERT(MUTEX_HELD(&tod_lock)); 152 } 153 154 155 /* 156 * No watchdog function. 157 */ 158 /* ARGSUSED */ 159 static uint_t 160 todsf_set_watchdog_timer(uint_t timeoutval) 161 { 162 ASSERT(MUTEX_HELD(&tod_lock)); 163 return (0); 164 } 165 166 /* 167 * No watchdog function 168 */ 169 static uint_t 170 todsf_clear_watchdog_timer(void) 171 { 172 ASSERT(MUTEX_HELD(&tod_lock)); 173 return (0); 174 } 175 176 /* 177 * Null function. 178 */ 179 /* ARGSUSED */ 180 static void 181 todsf_set_power_alarm(timestruc_t ts) 182 { 183 ASSERT(MUTEX_HELD(&tod_lock)); 184 } 185 186 /* 187 * Null function 188 */ 189 static void 190 todsf_clear_power_alarm() 191 { 192 ASSERT(MUTEX_HELD(&tod_lock)); 193 } 194 195 /* 196 * Get clock freq from the cpunode 197 */ 198 uint64_t 199 todsf_get_cpufrequency(void) 200 { 201 return (cpunodes[CPU->cpu_id].clock_freq); 202 } 203