1 /* $NetBSD: OsdSchedule.c,v 1.12 2009/08/23 15:16:16 jmcneill Exp $ */ 2 3 /* 4 * Copyright 2001 Wasabi Systems, Inc. 5 * All rights reserved. 6 * 7 * Written by Jason R. Thorpe for Wasabi Systems, Inc. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed for the NetBSD Project by 20 * Wasabi Systems, Inc. 21 * 4. The name of Wasabi Systems, Inc. may not be used to endorse 22 * or promote products derived from this software without specific prior 23 * written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 27 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 28 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL WASABI SYSTEMS, INC 29 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 32 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 33 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 34 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 * POSSIBILITY OF SUCH DAMAGE. 36 */ 37 38 /* 39 * OS Services Layer 40 * 41 * 6.3: Scheduling services 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: OsdSchedule.c,v 1.12 2009/08/23 15:16:16 jmcneill Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/malloc.h> 49 #include <sys/proc.h> 50 #include <sys/systm.h> 51 #include <sys/kernel.h> 52 #include <sys/condvar.h> 53 #include <sys/mutex.h> 54 55 #include <dev/acpi/acpica.h> 56 57 #include <dev/acpi/acpi_osd.h> 58 59 #include <dev/sysmon/sysmon_taskq.h> 60 61 extern int acpi_suspended; 62 63 #define _COMPONENT ACPI_OS_SERVICES 64 ACPI_MODULE_NAME("SCHEDULE") 65 66 static kcondvar_t acpi_osd_sleep_cv; 67 static kmutex_t acpi_osd_sleep_mtx; 68 69 /* 70 * acpi_osd_sched_init: 71 * 72 * Initialize the APCICA Osd scheduler. Called from AcpiOsInitialize(). 73 */ 74 void 75 acpi_osd_sched_init(void) 76 { 77 sysmon_task_queue_init(); 78 mutex_init(&acpi_osd_sleep_mtx, MUTEX_DEFAULT, IPL_NONE); 79 cv_init(&acpi_osd_sleep_cv, "acpislp"); 80 } 81 82 /* 83 * AcpiOsGetThreadId: 84 * 85 * Obtain the ID of the currently executing thread. 86 */ 87 ACPI_THREAD_ID 88 AcpiOsGetThreadId(void) 89 { 90 return (ACPI_THREAD_ID)curlwp; 91 } 92 93 /* 94 * AcpiOsQueueForExecution: 95 * 96 * Schedule a procedure for deferred execution. 97 */ 98 ACPI_STATUS 99 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 100 void *Context) 101 { 102 int pri; 103 104 switch (Type) { 105 case OSL_GPE_HANDLER: 106 pri = 10; 107 break; 108 case OSL_GLOBAL_LOCK_HANDLER: 109 case OSL_EC_POLL_HANDLER: 110 case OSL_EC_BURST_HANDLER: 111 pri = 5; 112 break; 113 case OSL_NOTIFY_HANDLER: 114 pri = 3; 115 break; 116 case OSL_DEBUGGER_THREAD: 117 pri = 0; 118 break; 119 default: 120 return AE_BAD_PARAMETER; 121 } 122 123 switch (sysmon_task_queue_sched(pri, Function, Context)) { 124 case 0: 125 return AE_OK; 126 127 case ENOMEM: 128 return AE_NO_MEMORY; 129 130 default: 131 return AE_BAD_PARAMETER; 132 } 133 } 134 135 /* 136 * AcpiOsSleep: 137 * 138 * Suspend the running task (coarse granularity). 139 */ 140 void 141 AcpiOsSleep(ACPI_INTEGER Milliseconds) 142 { 143 if (cold || doing_shutdown || acpi_suspended) 144 DELAY(Milliseconds * 1000); 145 else { 146 mutex_enter(&acpi_osd_sleep_mtx); 147 cv_timedwait_sig(&acpi_osd_sleep_cv, &acpi_osd_sleep_mtx, 148 MAX(mstohz(Milliseconds), 1)); 149 mutex_exit(&acpi_osd_sleep_mtx); 150 } 151 } 152 153 /* 154 * AcpiOsStall: 155 * 156 * Suspend the running task (fine granularity). 157 */ 158 void 159 AcpiOsStall(UINT32 Microseconds) 160 { 161 /* 162 * sleep(9) isn't safe because AcpiOsStall may be called 163 * with interrupt-disabled. (eg. by AcpiEnterSleepState) 164 * we should watch out for long stall requests. 165 */ 166 #ifdef ACPI_DEBUG 167 if (Microseconds > 1000) 168 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n", 169 Microseconds)); 170 #endif 171 172 delay(Microseconds); 173 } 174 175 /* 176 * AcpiOsGetTimer: 177 * 178 * Get the current system time in 100 nanosecond units 179 */ 180 UINT64 181 AcpiOsGetTimer(void) 182 { 183 struct timeval tv; 184 UINT64 t; 185 186 /* XXX During early boot there is no (decent) timer available yet. */ 187 if (cold) 188 panic("acpi: timer op not yet supported during boot"); 189 190 microtime(&tv); 191 t = (UINT64)10 * tv.tv_usec; 192 t += (UINT64)10000000 * tv.tv_sec; 193 194 return t; 195 } 196