exsystem.c revision 67754
1 2/****************************************************************************** 3 * 4 * Module Name: amsystem - Interface to OS services 5 * $Revision: 52 $ 6 * 7 *****************************************************************************/ 8 9/****************************************************************************** 10 * 11 * 1. Copyright Notice 12 * 13 * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights 14 * reserved. 15 * 16 * 2. License 17 * 18 * 2.1. This is your license from Intel Corp. under its intellectual property 19 * rights. You may have additional license terms from the party that provided 20 * you this software, covering your right to use that party's intellectual 21 * property rights. 22 * 23 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 24 * copy of the source code appearing in this file ("Covered Code") an 25 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 26 * base code distributed originally by Intel ("Original Intel Code") to copy, 27 * make derivatives, distribute, use and display any portion of the Covered 28 * Code in any form, with the right to sublicense such rights; and 29 * 30 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 31 * license (with the right to sublicense), under only those claims of Intel 32 * patents that are infringed by the Original Intel Code, to make, use, sell, 33 * offer to sell, and import the Covered Code and derivative works thereof 34 * solely to the minimum extent necessary to exercise the above copyright 35 * license, and in no event shall the patent license extend to any additions 36 * to or modifications of the Original Intel Code. No other license or right 37 * is granted directly or by implication, estoppel or otherwise; 38 * 39 * The above copyright and patent license is granted only if the following 40 * conditions are met: 41 * 42 * 3. Conditions 43 * 44 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 45 * Redistribution of source code of any substantial portion of the Covered 46 * Code or modification with rights to further distribute source must include 47 * the above Copyright Notice, the above License, this list of Conditions, 48 * and the following Disclaimer and Export Compliance provision. In addition, 49 * Licensee must cause all Covered Code to which Licensee contributes to 50 * contain a file documenting the changes Licensee made to create that Covered 51 * Code and the date of any change. Licensee must include in that file the 52 * documentation of any changes made by any predecessor Licensee. Licensee 53 * must include a prominent statement that the modification is derived, 54 * directly or indirectly, from Original Intel Code. 55 * 56 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 57 * Redistribution of source code of any substantial portion of the Covered 58 * Code or modification without rights to further distribute source must 59 * include the following Disclaimer and Export Compliance provision in the 60 * documentation and/or other materials provided with distribution. In 61 * addition, Licensee may not authorize further sublicense of source of any 62 * portion of the Covered Code, and must include terms to the effect that the 63 * license from Licensee to its licensee is limited to the intellectual 64 * property embodied in the software Licensee provides to its licensee, and 65 * not to intellectual property embodied in modifications its licensee may 66 * make. 67 * 68 * 3.3. Redistribution of Executable. Redistribution in executable form of any 69 * substantial portion of the Covered Code or modification must reproduce the 70 * above Copyright Notice, and the following Disclaimer and Export Compliance 71 * provision in the documentation and/or other materials provided with the 72 * distribution. 73 * 74 * 3.4. Intel retains all right, title, and interest in and to the Original 75 * Intel Code. 76 * 77 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 78 * Intel shall be used in advertising or otherwise to promote the sale, use or 79 * other dealings in products derived from or relating to the Covered Code 80 * without prior written authorization from Intel. 81 * 82 * 4. Disclaimer and Export Compliance 83 * 84 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 85 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 86 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 87 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 88 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 89 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 90 * PARTICULAR PURPOSE. 91 * 92 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 93 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 94 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 95 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 96 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 97 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 98 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 99 * LIMITED REMEDY. 100 * 101 * 4.3. Licensee shall not export, either directly or indirectly, any of this 102 * software or system incorporating such software without first obtaining any 103 * required license or other approval from the U. S. Department of Commerce or 104 * any other agency or department of the United States Government. In the 105 * event Licensee exports any such software from the United States or 106 * re-exports any such software from a foreign destination, Licensee shall 107 * ensure that the distribution and export/re-export of the software is in 108 * compliance with all laws, regulations, orders, or other restrictions of the 109 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 110 * any of its subsidiaries will export/re-export any technical data, process, 111 * software, or service, directly or indirectly, to any country for which the 112 * United States government or any agency thereof requires an export license, 113 * other governmental approval, or letter of assurance, without first obtaining 114 * such license, approval or letter. 115 * 116 *****************************************************************************/ 117 118#define __AMSYSTEM_C__ 119 120#include "acpi.h" 121#include "acinterp.h" 122#include "acnamesp.h" 123#include "achware.h" 124#include "acevents.h" 125 126#define _COMPONENT INTERPRETER 127 MODULE_NAME ("amsystem") 128 129 130/******************************************************************************* 131 * 132 * FUNCTION: AcpiAmlSystemThreadId 133 * 134 * PARAMETERS: None 135 * 136 * RETURN: Current Thread ID (for this implementation a 1 is returned) 137 * 138 * DESCRIPTION: An invocation is identified by its Thread ID. In a single 139 * threaded OS the Thread ID is undefined so a 1 will be 140 * returned. 141 * 142 ******************************************************************************/ 143 144UINT16 145AcpiAmlSystemThreadId (void) 146{ 147 return (1); 148} 149 150 151/******************************************************************************* 152 * 153 * FUNCTION: AcpiAmlSystemWaitSemaphore 154 * 155 * PARAMETERS: Semaphore - OSD semaphore to wait on 156 * Timeout - Max time to wait 157 * 158 * RETURN: Status 159 * 160 * DESCRIPTION: Implements a semaphore wait with a check to see if the 161 * semaphore is available immediately. If it is not, the 162 * interpreter is released. 163 * 164 ******************************************************************************/ 165 166ACPI_STATUS 167AcpiAmlSystemWaitSemaphore ( 168 ACPI_HANDLE Semaphore, 169 UINT32 Timeout) 170{ 171 ACPI_STATUS Status; 172 173 174 FUNCTION_TRACE ("AcpiAmlSystemWaitSemaphore"); 175 176 Status = AcpiOsWaitSemaphore (Semaphore, 1, 0); 177 if (ACPI_SUCCESS (Status)) 178 { 179 return_ACPI_STATUS (Status); 180 } 181 182 if (Status == AE_TIME) 183 { 184 /* We must wait, so unlock the interpreter */ 185 186 AcpiAmlExitInterpreter (); 187 188 Status = AcpiOsWaitSemaphore (Semaphore, 1, Timeout); 189 190 /* Reacquire the interpreter */ 191 192 AcpiAmlEnterInterpreter (); 193 194 DEBUG_PRINT (TRACE_EXEC, 195 ("*** Thread awake and inside interpreter after blocking, %s\n", 196 AcpiCmFormatException (Status))); 197 } 198 199 return_ACPI_STATUS (Status); 200} 201 202 203/******************************************************************************* 204 * 205 * FUNCTION: AcpiAmlSystemDoStall 206 * 207 * PARAMETERS: HowLong - The amount of time to stall 208 * 209 * RETURN: None 210 * 211 * DESCRIPTION: Suspend running thread for specified amount of time. 212 * 213 ******************************************************************************/ 214 215void 216AcpiAmlSystemDoStall ( 217 UINT32 HowLong) 218{ 219 220 if (HowLong > 1000) /* 1 millisecond */ 221 { 222 /* Since this thread will sleep, we must release the interpreter */ 223 224 AcpiAmlExitInterpreter (); 225 226 AcpiOsSleepUsec (HowLong); 227 228 /* And now we must get the interpreter again */ 229 230 AcpiAmlEnterInterpreter (); 231 } 232 233 else 234 { 235 AcpiOsSleepUsec (HowLong); 236 } 237} 238 239 240/******************************************************************************* 241 * 242 * FUNCTION: AcpiAmlSystemDoSuspend 243 * 244 * PARAMETERS: HowLong - The amount of time to suspend 245 * 246 * RETURN: None 247 * 248 * DESCRIPTION: Suspend running thread for specified amount of time. 249 * 250 ******************************************************************************/ 251 252void 253AcpiAmlSystemDoSuspend ( 254 UINT32 HowLong) 255{ 256 /* Since this thread will sleep, we must release the interpreter */ 257 258 AcpiAmlExitInterpreter (); 259 260 AcpiOsSleep ((UINT16) (HowLong / (UINT32) 1000), 261 (UINT16) (HowLong % (UINT32) 1000)); 262 263 /* And now we must get the interpreter again */ 264 265 AcpiAmlEnterInterpreter (); 266} 267 268 269/******************************************************************************* 270 * 271 * FUNCTION: AcpiAmlSystemAcquireMutex 272 * 273 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor 274 * *ObjDesc - The object descriptor for this op 275 * 276 * RETURN: Status 277 * 278 * DESCRIPTION: Provides an access point to perform synchronization operations 279 * within the AML. This function will cause a lock to be generated 280 * for the Mutex pointed to by ObjDesc. 281 * 282 ******************************************************************************/ 283 284ACPI_STATUS 285AcpiAmlSystemAcquireMutex ( 286 ACPI_OPERAND_OBJECT *TimeDesc, 287 ACPI_OPERAND_OBJECT *ObjDesc) 288{ 289 ACPI_STATUS Status = AE_OK; 290 291 292 FUNCTION_TRACE_PTR ("AcpiAmlSystemAcquireMutex", ObjDesc); 293 294 if (!ObjDesc) 295 { 296 return_ACPI_STATUS (AE_BAD_PARAMETER); 297 } 298 299 /* 300 * Support for the _GL_ Mutex object -- go get the global lock 301 */ 302 303 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore) 304 { 305 Status = AcpiEvAcquireGlobalLock (); 306 return_ACPI_STATUS (Status); 307 } 308 309 Status = AcpiAmlSystemWaitSemaphore (ObjDesc->Mutex.Semaphore, 310 (UINT32) TimeDesc->Number.Value); 311 return_ACPI_STATUS (Status); 312} 313 314 315/******************************************************************************* 316 * 317 * FUNCTION: AcpiAmlSystemReleaseMutex 318 * 319 * PARAMETERS: *ObjDesc - The object descriptor for this op 320 * 321 * RETURN: Status 322 * 323 * DESCRIPTION: Provides an access point to perform synchronization operations 324 * within the AML. This operation is a request to release a 325 * previously acquired Mutex. If the Mutex variable is set then 326 * it will be decremented. 327 * 328 ******************************************************************************/ 329 330ACPI_STATUS 331AcpiAmlSystemReleaseMutex ( 332 ACPI_OPERAND_OBJECT *ObjDesc) 333{ 334 ACPI_STATUS Status = AE_OK; 335 336 337 FUNCTION_TRACE ("AcpiAmlSystemReleaseMutex"); 338 339 340 if (!ObjDesc) 341 { 342 return_ACPI_STATUS (AE_BAD_PARAMETER); 343 } 344 345 /* 346 * Support for the _GL_ Mutex object -- release the global lock 347 */ 348 if (ObjDesc->Mutex.Semaphore == AcpiGbl_GlobalLockSemaphore) 349 { 350 AcpiEvReleaseGlobalLock (); 351 return_ACPI_STATUS (AE_OK); 352 } 353 354 Status = AcpiOsSignalSemaphore (ObjDesc->Mutex.Semaphore, 1); 355 return_ACPI_STATUS (Status); 356} 357 358 359/******************************************************************************* 360 * 361 * FUNCTION: AcpiAmlSystemSignalEvent 362 * 363 * PARAMETERS: *ObjDesc - The object descriptor for this op 364 * 365 * RETURN: AE_OK 366 * 367 * DESCRIPTION: Provides an access point to perform synchronization operations 368 * within the AML. 369 * 370 ******************************************************************************/ 371 372ACPI_STATUS 373AcpiAmlSystemSignalEvent ( 374 ACPI_OPERAND_OBJECT *ObjDesc) 375{ 376 ACPI_STATUS Status = AE_OK; 377 378 379 FUNCTION_TRACE ("AcpiAmlSystemSignalEvent"); 380 381 382 if (ObjDesc) 383 { 384 Status = AcpiOsSignalSemaphore (ObjDesc->Event.Semaphore, 1); 385 } 386 387 return_ACPI_STATUS (Status); 388} 389 390 391/******************************************************************************* 392 * 393 * FUNCTION: AcpiAmlSystemWaitEvent 394 * 395 * PARAMETERS: *TimeDesc - The 'time to delay' object descriptor 396 * *ObjDesc - The object descriptor for this op 397 * 398 * RETURN: Status 399 * 400 * DESCRIPTION: Provides an access point to perform synchronization operations 401 * within the AML. This operation is a request to wait for an 402 * event. 403 * 404 ******************************************************************************/ 405 406ACPI_STATUS 407AcpiAmlSystemWaitEvent ( 408 ACPI_OPERAND_OBJECT *TimeDesc, 409 ACPI_OPERAND_OBJECT *ObjDesc) 410{ 411 ACPI_STATUS Status = AE_OK; 412 413 414 FUNCTION_TRACE ("AcpiAmlSystemWaitEvent"); 415 416 417 if (ObjDesc) 418 { 419 Status = AcpiAmlSystemWaitSemaphore (ObjDesc->Event.Semaphore, 420 (UINT32) TimeDesc->Number.Value); 421 } 422 423 424 return_ACPI_STATUS (Status); 425} 426 427 428/******************************************************************************* 429 * 430 * FUNCTION: AcpiAmlSystemResetEvent 431 * 432 * PARAMETERS: *ObjDesc - The object descriptor for this op 433 * 434 * RETURN: Status 435 * 436 * DESCRIPTION: Provides an access point to perform synchronization operations 437 * within the AML. 438 * 439 ******************************************************************************/ 440 441ACPI_STATUS 442AcpiAmlSystemResetEvent ( 443 ACPI_OPERAND_OBJECT *ObjDesc) 444{ 445 ACPI_STATUS Status = AE_OK; 446 void *TempSemaphore; 447 448 449 /* 450 * We are going to simply delete the existing semaphore and 451 * create a new one! 452 */ 453 454 Status = AcpiOsCreateSemaphore (ACPI_NO_UNIT_LIMIT, 0, &TempSemaphore); 455 if (ACPI_SUCCESS (Status)) 456 { 457 AcpiOsDeleteSemaphore (ObjDesc->Mutex.Semaphore); 458 ObjDesc->Mutex.Semaphore = TempSemaphore; 459 } 460 461 return (Status); 462} 463 464