1 /* $NetBSD: OsdSchedule.c,v 1.1 2006/03/23 13:41:13 kochi 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 1.1 2006/03/23 13:41:13 kochi 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(__FUNCTION__); 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(__FUNCTION__); 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 UINT32 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 AcpiOsQueueForExecution(UINT32 Priority, ACPI_OSD_EXEC_CALLBACK Function, 118 void *Context) 119 { 120 int pri; 121 122 ACPI_FUNCTION_TRACE(__FUNCTION__); 123 124 switch (Priority) { 125 case OSD_PRIORITY_GPE: 126 pri = 3; 127 break; 128 129 case OSD_PRIORITY_HIGH: 130 pri = 2; 131 break; 132 133 case OSD_PRIORITY_MED: 134 pri = 1; 135 break; 136 137 case OSD_PRIORITY_LO: 138 pri = 0; 139 break; 140 141 default: 142 return_ACPI_STATUS(AE_BAD_PARAMETER); 143 } 144 145 switch (sysmon_task_queue_sched(pri, Function, Context)) { 146 case 0: 147 return_ACPI_STATUS(AE_OK); 148 149 case ENOMEM: 150 return_ACPI_STATUS(AE_NO_MEMORY); 151 152 default: 153 return_ACPI_STATUS(AE_BAD_PARAMETER); 154 } 155 } 156 157 /* 158 * AcpiOsSleep: 159 * 160 * Suspend the running task (coarse granularity). 161 */ 162 void 163 AcpiOsSleep(ACPI_INTEGER Milliseconds) 164 { 165 int timo; 166 167 ACPI_FUNCTION_TRACE(__FUNCTION__); 168 169 timo = Milliseconds * hz / 1000; 170 if (timo == 0) 171 timo = 1; 172 173 (void) tsleep(&timo, PVM, "acpislp", timo); 174 175 return_VOID; 176 } 177 178 /* 179 * AcpiOsStall: 180 * 181 * Suspend the running task (fine granularity). 182 */ 183 void 184 AcpiOsStall(UINT32 Microseconds) 185 { 186 187 ACPI_FUNCTION_TRACE(__FUNCTION__); 188 189 /* 190 * sleep(9) isn't safe because AcpiOsStall may be called 191 * with interrupt-disabled. (eg. by AcpiEnterSleepState) 192 * we should watch out for long stall requests. 193 */ 194 #ifdef ACPI_DEBUG 195 if (Microseconds > 1000) 196 ACPI_DEBUG_PRINT((ACPI_DB_INFO, "long stall: %uus\n", 197 Microseconds)); 198 #endif 199 200 delay(Microseconds); 201 202 return_VOID; 203 204 } 205 206 /* 207 * AcpiOsStall: 208 * 209 * Get the current system time in 100 nanosecond units 210 */ 211 UINT64 212 AcpiOsGetTimer(void) 213 { 214 struct timeval tv; 215 UINT64 t; 216 217 /* XXX During early boot there is no (decent) timer available yet. */ 218 if (cold) 219 panic("acpi: timer op not yet supported during boot"); 220 221 microtime(&tv); 222 t = (UINT64)10 * tv.tv_usec; 223 t += (UINT64)10000000 * tv.tv_sec; 224 225 return (t); 226 } 227