1 /* $NetBSD: OsdSchedule.c,v 1.4 2007/12/17 15:02:31 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 1.4 2007/12/17 15:02:31 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 53 #include <dev/acpi/acpica.h> 54 55 #include <dev/acpi/acpi_osd.h> 56 57 #include <dev/sysmon/sysmon_taskq.h> 58 59 #define _COMPONENT ACPI_OS_SERVICES 60 ACPI_MODULE_NAME("SCHEDULE") 61 62 /* 63 * acpi_osd_sched_init: 64 * 65 * Initialize the APCICA Osd scheduler. Called from AcpiOsInitialize(). 66 */ 67 void 68 acpi_osd_sched_init(void) 69 { 70 71 ACPI_FUNCTION_TRACE(__func__); 72 73 sysmon_task_queue_init(); 74 75 return_VOID; 76 } 77 78 /* 79 * acpi_osd_sched_fini: 80 * 81 * Clean up the ACPICA Osd scheduler. Called from AcpiOsdTerminate(). 82 */ 83 void 84 acpi_osd_sched_fini(void) 85 { 86 87 ACPI_FUNCTION_TRACE(__func__); 88 89 sysmon_task_queue_fini(); 90 91 return_VOID; 92 } 93 94 /* 95 * AcpiOsGetThreadId: 96 * 97 * Obtain the ID of the currently executing thread. 98 */ 99 ACPI_THREAD_ID 100 AcpiOsGetThreadId(void) 101 { 102 103 /* XXX ACPI CA can call this function in interrupt context */ 104 if (curlwp == NULL) 105 return 1; 106 107 /* XXX Bleh, we're not allowed to return 0 (how stupid!) */ 108 return (curlwp->l_proc->p_pid + 1); 109 } 110 111 /* 112 * AcpiOsQueueForExecution: 113 * 114 * Schedule a procedure for deferred execution. 115 */ 116 ACPI_STATUS 117 AcpiOsExecute(ACPI_EXECUTE_TYPE Type, ACPI_OSD_EXEC_CALLBACK Function, 118 void *Context) 119 { 120 int pri; 121 122 ACPI_FUNCTION_TRACE(__func__); 123 124 switch (Type) { 125 case OSL_GPE_HANDLER: 126 pri = 10; 127 break; 128 case OSL_GLOBAL_LOCK_HANDLER: 129 case OSL_EC_POLL_HANDLER: 130 case OSL_EC_BURST_HANDLER: 131 pri = 5; 132 break; 133 case OSL_NOTIFY_HANDLER: 134 pri = 3; 135 break; 136 case OSL_DEBUGGER_THREAD: 137 pri = 0; 138 break; 139 default: 140 return_ACPI_STATUS(AE_BAD_PARAMETER); 141 } 142 143 switch (sysmon_task_queue_sched(pri, Function, Context)) { 144 case 0: 145 return_ACPI_STATUS(AE_OK); 146 147 case ENOMEM: 148 return_ACPI_STATUS(AE_NO_MEMORY); 149 150 default: 151 return_ACPI_STATUS(AE_BAD_PARAMETER); 152 } 153 } 154 155 /* 156 * AcpiOsSleep: 157 * 158 * Suspend the running task (coarse granularity). 159 */ 160 void 161 AcpiOsSleep(ACPI_INTEGER Milliseconds) 162 { 163 int timo; 164 165 ACPI_FUNCTION_TRACE(__func__); 166 167 timo = Milliseconds * hz / 1000; 168 if (timo == 0) 169 timo = 1; 170 171 (void) tsleep(&timo, PVM, "acpislp", timo); 172 173 return_VOID; 174 } 175 176 /* 177 * AcpiOsStall: 178 * 179 * Suspend the running task (fine granularity). 180 */ 181 void 182 AcpiOsStall(UINT32 Microseconds) 183 { 184 185 ACPI_FUNCTION_TRACE(__func__); 186 187 /* 188 * sleep(9) isn't safe because AcpiOsStall may be called 189 * with interrupt-disabled. (eg. by AcpiEnterSleepState) 190 * we should watch out for long stall requests. 191 */ 192 #ifdef ACPI_DEBUG 193 if (Microseconds > 1000) 194 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n", 195 Microseconds)); 196 #endif 197 198 delay(Microseconds); 199 200 return_VOID; 201 202 } 203 204 /* 205 * AcpiOsGetTimer: 206 * 207 * Get the current system time in 100 nanosecond units 208 */ 209 UINT64 210 AcpiOsGetTimer(void) 211 { 212 struct timeval tv; 213 UINT64 t; 214 215 /* XXX During early boot there is no (decent) timer available yet. */ 216 if (cold) 217 panic("acpi: timer op not yet supported during boot"); 218 219 microtime(&tv); 220 t = (UINT64)10 * tv.tv_usec; 221 t += (UINT64)10000000 * tv.tv_sec; 222 223 return (t); 224 } 225