|
||||
Warning, cross-references for /kernel/drivers/acpica/nsinit.c need to be fixed.
0001 /****************************************************************************** 0002 * 0003 * Module Name: nsinit - namespace initialization 0004 * 0005 *****************************************************************************/ 0006 0007 /****************************************************************************** 0008 * 0009 * 1. Copyright Notice 0010 * 0011 * Some or all of this work - Copyright (c) 1999 - 2009, Intel Corp. 0012 * All rights reserved. 0013 * 0014 * 2. License 0015 * 0016 * 2.1. This is your license from Intel Corp. under its intellectual property 0017 * rights. You may have additional license terms from the party that provided 0018 * you this software, covering your right to use that party's intellectual 0019 * property rights. 0020 * 0021 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 0022 * copy of the source code appearing in this file ("Covered Code") an 0023 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 0024 * base code distributed originally by Intel ("Original Intel Code") to copy, 0025 * make derivatives, distribute, use and display any portion of the Covered 0026 * Code in any form, with the right to sublicense such rights; and 0027 * 0028 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 0029 * license (with the right to sublicense), under only those claims of Intel 0030 * patents that are infringed by the Original Intel Code, to make, use, sell, 0031 * offer to sell, and import the Covered Code and derivative works thereof 0032 * solely to the minimum extent necessary to exercise the above copyright 0033 * license, and in no event shall the patent license extend to any additions 0034 * to or modifications of the Original Intel Code. No other license or right 0035 * is granted directly or by implication, estoppel or otherwise; 0036 * 0037 * The above copyright and patent license is granted only if the following 0038 * conditions are met: 0039 * 0040 * 3. Conditions 0041 * 0042 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 0043 * Redistribution of source code of any substantial portion of the Covered 0044 * Code or modification with rights to further distribute source must include 0045 * the above Copyright Notice, the above License, this list of Conditions, 0046 * and the following Disclaimer and Export Compliance provision. In addition, 0047 * Licensee must cause all Covered Code to which Licensee contributes to 0048 * contain a file documenting the changes Licensee made to create that Covered 0049 * Code and the date of any change. Licensee must include in that file the 0050 * documentation of any changes made by any predecessor Licensee. Licensee 0051 * must include a prominent statement that the modification is derived, 0052 * directly or indirectly, from Original Intel Code. 0053 * 0054 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 0055 * Redistribution of source code of any substantial portion of the Covered 0056 * Code or modification without rights to further distribute source must 0057 * include the following Disclaimer and Export Compliance provision in the 0058 * documentation and/or other materials provided with distribution. In 0059 * addition, Licensee may not authorize further sublicense of source of any 0060 * portion of the Covered Code, and must include terms to the effect that the 0061 * license from Licensee to its licensee is limited to the intellectual 0062 * property embodied in the software Licensee provides to its licensee, and 0063 * not to intellectual property embodied in modifications its licensee may 0064 * make. 0065 * 0066 * 3.3. Redistribution of Executable. Redistribution in executable form of any 0067 * substantial portion of the Covered Code or modification must reproduce the 0068 * above Copyright Notice, and the following Disclaimer and Export Compliance 0069 * provision in the documentation and/or other materials provided with the 0070 * distribution. 0071 * 0072 * 3.4. Intel retains all right, title, and interest in and to the Original 0073 * Intel Code. 0074 * 0075 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 0076 * Intel shall be used in advertising or otherwise to promote the sale, use or 0077 * other dealings in products derived from or relating to the Covered Code 0078 * without prior written authorization from Intel. 0079 * 0080 * 4. Disclaimer and Export Compliance 0081 * 0082 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 0083 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 0084 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 0085 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 0086 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 0087 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 0088 * PARTICULAR PURPOSE. 0089 * 0090 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 0091 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 0092 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 0093 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 0094 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 0095 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 0096 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 0097 * LIMITED REMEDY. 0098 * 0099 * 4.3. Licensee shall not export, either directly or indirectly, any of this 0100 * software or system incorporating such software without first obtaining any 0101 * required license or other approval from the U. S. Department of Commerce or 0102 * any other agency or department of the United States Government. In the 0103 * event Licensee exports any such software from the United States or 0104 * re-exports any such software from a foreign destination, Licensee shall 0105 * ensure that the distribution and export/re-export of the software is in 0106 * compliance with all laws, regulations, orders, or other restrictions of the 0107 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 0108 * any of its subsidiaries will export/re-export any technical data, process, 0109 * software, or service, directly or indirectly, to any country for which the 0110 * United States government or any agency thereof requires an export license, 0111 * other governmental approval, or letter of assurance, without first obtaining 0112 * such license, approval or letter. 0113 * 0114 *****************************************************************************/ 0115 0116 0117 #define __NSXFINIT_C__ 0118 0119 #include "acpi.h" 0120 #include "accommon.h" 0121 #include "acnamesp.h" 0122 #include "acdispat.h" 0123 #include "acinterp.h" 0124 0125 #define _COMPONENT ACPI_NAMESPACE 0126 ACPI_MODULE_NAME ("nsinit") 0127 0128 /* Local prototypes */ 0129 0130 static ACPI_STATUS 0131 AcpiNsInitOneObject ( 0132 ACPI_HANDLE ObjHandle, 0133 UINT32 Level, 0134 void *Context, 0135 void **ReturnValue); 0136 0137 static ACPI_STATUS 0138 AcpiNsInitOneDevice ( 0139 ACPI_HANDLE ObjHandle, 0140 UINT32 NestingLevel, 0141 void *Context, 0142 void **ReturnValue); 0143 0144 static ACPI_STATUS 0145 AcpiNsFindIniMethods ( 0146 ACPI_HANDLE ObjHandle, 0147 UINT32 NestingLevel, 0148 void *Context, 0149 void **ReturnValue); 0150 0151 0152 /******************************************************************************* 0153 * 0154 * FUNCTION: AcpiNsInitializeObjects 0155 * 0156 * PARAMETERS: None 0157 * 0158 * RETURN: Status 0159 * 0160 * DESCRIPTION: Walk the entire namespace and perform any necessary 0161 * initialization on the objects found therein 0162 * 0163 ******************************************************************************/ 0164 0165 ACPI_STATUS 0166 AcpiNsInitializeObjects ( 0167 void) 0168 { 0169 ACPI_STATUS Status; 0170 ACPI_INIT_WALK_INFO Info; 0171 0172 0173 ACPI_FUNCTION_TRACE (NsInitializeObjects); 0174 0175 0176 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 0177 "**** Starting initialization of namespace objects ****\n")); 0178 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 0179 "Completing Region/Field/Buffer/Package initialization:")); 0180 0181 /* Set all init info to zero */ 0182 0183 ACPI_MEMSET (&Info, 0, sizeof (ACPI_INIT_WALK_INFO)); 0184 0185 /* Walk entire namespace from the supplied root */ 0186 0187 Status = AcpiWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 0188 ACPI_UINT32_MAX, AcpiNsInitOneObject, 0189 &Info, NULL); 0190 if (ACPI_FAILURE (Status)) 0191 { 0192 ACPI_EXCEPTION ((AE_INFO, Status, "During WalkNamespace")); 0193 } 0194 0195 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 0196 "\nInitialized %hd/%hd Regions %hd/%hd Fields %hd/%hd " 0197 "Buffers %hd/%hd Packages (%hd nodes)\n", 0198 Info.OpRegionInit, Info.OpRegionCount, 0199 Info.FieldInit, Info.FieldCount, 0200 Info.BufferInit, Info.BufferCount, 0201 Info.PackageInit, Info.PackageCount, Info.ObjectCount)); 0202 0203 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 0204 "%hd Control Methods found\n", Info.MethodCount)); 0205 ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, 0206 "%hd Op Regions found\n", Info.OpRegionCount)); 0207 0208 return_ACPI_STATUS (AE_OK); 0209 } 0210 0211 0212 /******************************************************************************* 0213 * 0214 * FUNCTION: AcpiNsInitializeDevices 0215 * 0216 * PARAMETERS: None 0217 * 0218 * RETURN: ACPI_STATUS 0219 * 0220 * DESCRIPTION: Walk the entire namespace and initialize all ACPI devices. 0221 * This means running _INI on all present devices. 0222 * 0223 * Note: We install PCI config space handler on region access, 0224 * not here. 0225 * 0226 ******************************************************************************/ 0227 0228 ACPI_STATUS 0229 AcpiNsInitializeDevices ( 0230 void) 0231 { 0232 ACPI_STATUS Status; 0233 ACPI_DEVICE_WALK_INFO Info; 0234 0235 0236 ACPI_FUNCTION_TRACE (NsInitializeDevices); 0237 0238 0239 /* Init counters */ 0240 0241 Info.DeviceCount = 0; 0242 Info.Num_STA = 0; 0243 Info.Num_INI = 0; 0244 0245 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 0246 "Initializing Device/Processor/Thermal objects " 0247 "by executing _INI methods:")); 0248 0249 /* Tree analysis: find all subtrees that contain _INI methods */ 0250 0251 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 0252 ACPI_UINT32_MAX, FALSE, AcpiNsFindIniMethods, &Info, NULL); 0253 if (ACPI_FAILURE (Status)) 0254 { 0255 goto ErrorExit; 0256 } 0257 0258 /* Allocate the evaluation information block */ 0259 0260 Info.EvaluateInfo = ACPI_ALLOCATE_ZEROED (sizeof (ACPI_EVALUATE_INFO)); 0261 if (!Info.EvaluateInfo) 0262 { 0263 Status = AE_NO_MEMORY; 0264 goto ErrorExit; 0265 } 0266 0267 /* Walk namespace to execute all _INIs on present devices */ 0268 0269 Status = AcpiNsWalkNamespace (ACPI_TYPE_ANY, ACPI_ROOT_OBJECT, 0270 ACPI_UINT32_MAX, FALSE, AcpiNsInitOneDevice, &Info, NULL); 0271 0272 ACPI_FREE (Info.EvaluateInfo); 0273 if (ACPI_FAILURE (Status)) 0274 { 0275 goto ErrorExit; 0276 } 0277 0278 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, 0279 "\nExecuted %hd _INI methods requiring %hd _STA executions " 0280 "(examined %hd objects)\n", 0281 Info.Num_INI, Info.Num_STA, Info.DeviceCount)); 0282 0283 return_ACPI_STATUS (Status); 0284 0285 0286 ErrorExit: 0287 ACPI_EXCEPTION ((AE_INFO, Status, "During device initialization")); 0288 return_ACPI_STATUS (Status); 0289 } 0290 0291 0292 /******************************************************************************* 0293 * 0294 * FUNCTION: AcpiNsInitOneObject 0295 * 0296 * PARAMETERS: ObjHandle - Node 0297 * Level - Current nesting level 0298 * Context - Points to a init info struct 0299 * ReturnValue - Not used 0300 * 0301 * RETURN: Status 0302 * 0303 * DESCRIPTION: Callback from AcpiWalkNamespace. Invoked for every object 0304 * within the namespace. 0305 * 0306 * Currently, the only objects that require initialization are: 0307 * 1) Methods 0308 * 2) Op Regions 0309 * 0310 ******************************************************************************/ 0311 0312 static ACPI_STATUS 0313 AcpiNsInitOneObject ( 0314 ACPI_HANDLE ObjHandle, 0315 UINT32 Level, 0316 void *Context, 0317 void **ReturnValue) 0318 { 0319 ACPI_OBJECT_TYPE Type; 0320 ACPI_STATUS Status = AE_OK; 0321 ACPI_INIT_WALK_INFO *Info = (ACPI_INIT_WALK_INFO *) Context; 0322 ACPI_NAMESPACE_NODE *Node = (ACPI_NAMESPACE_NODE *) ObjHandle; 0323 ACPI_OPERAND_OBJECT *ObjDesc; 0324 0325 0326 ACPI_FUNCTION_NAME (NsInitOneObject); 0327 0328 0329 Info->ObjectCount++; 0330 0331 /* And even then, we are only interested in a few object types */ 0332 0333 Type = AcpiNsGetType (ObjHandle); 0334 ObjDesc = AcpiNsGetAttachedObject (Node); 0335 if (!ObjDesc) 0336 { 0337 return (AE_OK); 0338 } 0339 0340 /* Increment counters for object types we are looking for */ 0341 0342 switch (Type) 0343 { 0344 case ACPI_TYPE_REGION: 0345 Info->OpRegionCount++; 0346 break; 0347 0348 case ACPI_TYPE_BUFFER_FIELD: 0349 Info->FieldCount++; 0350 break; 0351 0352 case ACPI_TYPE_LOCAL_BANK_FIELD: 0353 Info->FieldCount++; 0354 break; 0355 0356 case ACPI_TYPE_BUFFER: 0357 Info->BufferCount++; 0358 break; 0359 0360 case ACPI_TYPE_PACKAGE: 0361 Info->PackageCount++; 0362 break; 0363 0364 default: 0365 0366 /* No init required, just exit now */ 0367 return (AE_OK); 0368 } 0369 0370 /* If the object is already initialized, nothing else to do */ 0371 0372 if (ObjDesc->Common.Flags & AOPOBJ_DATA_VALID) 0373 { 0374 return (AE_OK); 0375 } 0376 0377 /* Must lock the interpreter before executing AML code */ 0378 0379 AcpiExEnterInterpreter (); 0380 0381 /* 0382 * Each of these types can contain executable AML code within the 0383 * declaration. 0384 */ 0385 switch (Type) 0386 { 0387 case ACPI_TYPE_REGION: 0388 0389 Info->OpRegionInit++; 0390 Status = AcpiDsGetRegionArguments (ObjDesc); 0391 break; 0392 0393 case ACPI_TYPE_BUFFER_FIELD: 0394 0395 Info->FieldInit++; 0396 Status = AcpiDsGetBufferFieldArguments (ObjDesc); 0397 break; 0398 0399 case ACPI_TYPE_LOCAL_BANK_FIELD: 0400 0401 Info->FieldInit++; 0402 Status = AcpiDsGetBankFieldArguments (ObjDesc); 0403 break; 0404 0405 case ACPI_TYPE_BUFFER: 0406 0407 Info->BufferInit++; 0408 Status = AcpiDsGetBufferArguments (ObjDesc); 0409 break; 0410 0411 case ACPI_TYPE_PACKAGE: 0412 0413 Info->PackageInit++; 0414 Status = AcpiDsGetPackageArguments (ObjDesc); 0415 break; 0416 0417 default: 0418 /* No other types can get here */ 0419 break; 0420 } 0421 0422 if (ACPI_FAILURE (Status)) 0423 { 0424 ACPI_EXCEPTION ((AE_INFO, Status, 0425 "Could not execute arguments for [%4.4s] (%s)", 0426 AcpiUtGetNodeName (Node), AcpiUtGetTypeName (Type))); 0427 } 0428 0429 /* 0430 * Print a dot for each object unless we are going to print the entire 0431 * pathname 0432 */ 0433 if (!(AcpiDbgLevel & ACPI_LV_INIT_NAMES)) 0434 { 0435 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, ".")); 0436 } 0437 0438 /* 0439 * We ignore errors from above, and always return OK, since we don't want 0440 * to abort the walk on any single error. 0441 */ 0442 AcpiExExitInterpreter (); 0443 return (AE_OK); 0444 } 0445 0446 0447 /******************************************************************************* 0448 * 0449 * FUNCTION: AcpiNsFindIniMethods 0450 * 0451 * PARAMETERS: ACPI_WALK_CALLBACK 0452 * 0453 * RETURN: ACPI_STATUS 0454 * 0455 * DESCRIPTION: Called during namespace walk. Finds objects named _INI under 0456 * device/processor/thermal objects, and marks the entire subtree 0457 * with a SUBTREE_HAS_INI flag. This flag is used during the 0458 * subsequent device initialization walk to avoid entire subtrees 0459 * that do not contain an _INI. 0460 * 0461 ******************************************************************************/ 0462 0463 static ACPI_STATUS 0464 AcpiNsFindIniMethods ( 0465 ACPI_HANDLE ObjHandle, 0466 UINT32 NestingLevel, 0467 void *Context, 0468 void **ReturnValue) 0469 { 0470 ACPI_DEVICE_WALK_INFO *Info = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 0471 ACPI_NAMESPACE_NODE *Node; 0472 ACPI_NAMESPACE_NODE *ParentNode; 0473 0474 0475 /* Keep count of device/processor/thermal objects */ 0476 0477 Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 0478 if ((Node->Type == ACPI_TYPE_DEVICE) || 0479 (Node->Type == ACPI_TYPE_PROCESSOR) || 0480 (Node->Type == ACPI_TYPE_THERMAL)) 0481 { 0482 Info->DeviceCount++; 0483 return (AE_OK); 0484 } 0485 0486 /* We are only looking for methods named _INI */ 0487 0488 if (!ACPI_COMPARE_NAME (Node->Name.Ascii, METHOD_NAME__INI)) 0489 { 0490 return (AE_OK); 0491 } 0492 0493 /* 0494 * The only _INI methods that we care about are those that are 0495 * present under Device, Processor, and Thermal objects. 0496 */ 0497 ParentNode = AcpiNsGetParentNode (Node); 0498 switch (ParentNode->Type) 0499 { 0500 case ACPI_TYPE_DEVICE: 0501 case ACPI_TYPE_PROCESSOR: 0502 case ACPI_TYPE_THERMAL: 0503 0504 /* Mark parent and bubble up the INI present flag to the root */ 0505 0506 while (ParentNode) 0507 { 0508 ParentNode->Flags |= ANOBJ_SUBTREE_HAS_INI; 0509 ParentNode = AcpiNsGetParentNode (ParentNode); 0510 } 0511 break; 0512 0513 default: 0514 break; 0515 } 0516 0517 return (AE_OK); 0518 } 0519 0520 0521 /******************************************************************************* 0522 * 0523 * FUNCTION: AcpiNsInitOneDevice 0524 * 0525 * PARAMETERS: ACPI_WALK_CALLBACK 0526 * 0527 * RETURN: ACPI_STATUS 0528 * 0529 * DESCRIPTION: This is called once per device soon after ACPI is enabled 0530 * to initialize each device. It determines if the device is 0531 * present, and if so, calls _INI. 0532 * 0533 ******************************************************************************/ 0534 0535 static ACPI_STATUS 0536 AcpiNsInitOneDevice ( 0537 ACPI_HANDLE ObjHandle, 0538 UINT32 NestingLevel, 0539 void *Context, 0540 void **ReturnValue) 0541 { 0542 ACPI_DEVICE_WALK_INFO *WalkInfo = ACPI_CAST_PTR (ACPI_DEVICE_WALK_INFO, Context); 0543 ACPI_EVALUATE_INFO *Info = WalkInfo->EvaluateInfo; 0544 UINT32 Flags; 0545 ACPI_STATUS Status; 0546 ACPI_NAMESPACE_NODE *DeviceNode; 0547 0548 0549 ACPI_FUNCTION_TRACE (NsInitOneDevice); 0550 0551 0552 /* We are interested in Devices, Processors and ThermalZones only */ 0553 0554 DeviceNode = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, ObjHandle); 0555 if ((DeviceNode->Type != ACPI_TYPE_DEVICE) && 0556 (DeviceNode->Type != ACPI_TYPE_PROCESSOR) && 0557 (DeviceNode->Type != ACPI_TYPE_THERMAL)) 0558 { 0559 return_ACPI_STATUS (AE_OK); 0560 } 0561 0562 /* 0563 * Because of an earlier namespace analysis, all subtrees that contain an 0564 * _INI method are tagged. 0565 * 0566 * If this device subtree does not contain any _INI methods, we 0567 * can exit now and stop traversing this entire subtree. 0568 */ 0569 if (!(DeviceNode->Flags & ANOBJ_SUBTREE_HAS_INI)) 0570 { 0571 return_ACPI_STATUS (AE_CTRL_DEPTH); 0572 } 0573 0574 /* 0575 * Run _STA to determine if this device is present and functioning. We 0576 * must know this information for two important reasons (from ACPI spec): 0577 * 0578 * 1) We can only run _INI if the device is present. 0579 * 2) We must abort the device tree walk on this subtree if the device is 0580 * not present and is not functional (we will not examine the children) 0581 * 0582 * The _STA method is not required to be present under the device, we 0583 * assume the device is present if _STA does not exist. 0584 */ 0585 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 0586 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__STA)); 0587 0588 Status = AcpiUtExecute_STA (DeviceNode, &Flags); 0589 if (ACPI_FAILURE (Status)) 0590 { 0591 /* Ignore error and move on to next device */ 0592 0593 return_ACPI_STATUS (AE_OK); 0594 } 0595 0596 /* 0597 * Flags == -1 means that _STA was not found. In this case, we assume that 0598 * the device is both present and functional. 0599 * 0600 * From the ACPI spec, description of _STA: 0601 * 0602 * "If a device object (including the processor object) does not have an 0603 * _STA object, then OSPM assumes that all of the above bits are set (in 0604 * other words, the device is present, ..., and functioning)" 0605 */ 0606 if (Flags != ACPI_UINT32_MAX) 0607 { 0608 WalkInfo->Num_STA++; 0609 } 0610 0611 /* 0612 * Examine the PRESENT and FUNCTIONING status bits 0613 * 0614 * Note: ACPI spec does not seem to specify behavior for the present but 0615 * not functioning case, so we assume functioning if present. 0616 */ 0617 if (!(Flags & ACPI_STA_DEVICE_PRESENT)) 0618 { 0619 /* Device is not present, we must examine the Functioning bit */ 0620 0621 if (Flags & ACPI_STA_DEVICE_FUNCTIONING) 0622 { 0623 /* 0624 * Device is not present but is "functioning". In this case, 0625 * we will not run _INI, but we continue to examine the children 0626 * of this device. 0627 * 0628 * From the ACPI spec, description of _STA: (Note - no mention 0629 * of whether to run _INI or not on the device in question) 0630 * 0631 * "_STA may return bit 0 clear (not present) with bit 3 set 0632 * (device is functional). This case is used to indicate a valid 0633 * device for which no device driver should be loaded (for example, 0634 * a bridge device.) Children of this device may be present and 0635 * valid. OSPM should continue enumeration below a device whose 0636 * _STA returns this bit combination" 0637 */ 0638 return_ACPI_STATUS (AE_OK); 0639 } 0640 else 0641 { 0642 /* 0643 * Device is not present and is not functioning. We must abort the 0644 * walk of this subtree immediately -- don't look at the children 0645 * of such a device. 0646 * 0647 * From the ACPI spec, description of _INI: 0648 * 0649 * "If the _STA method indicates that the device is not present, 0650 * OSPM will not run the _INI and will not examine the children 0651 * of the device for _INI methods" 0652 */ 0653 return_ACPI_STATUS (AE_CTRL_DEPTH); 0654 } 0655 } 0656 0657 /* 0658 * The device is present or is assumed present if no _STA exists. 0659 * Run the _INI if it exists (not required to exist) 0660 * 0661 * Note: We know there is an _INI within this subtree, but it may not be 0662 * under this particular device, it may be lower in the branch. 0663 */ 0664 ACPI_DEBUG_EXEC (AcpiUtDisplayInitPathname ( 0665 ACPI_TYPE_METHOD, DeviceNode, METHOD_NAME__INI)); 0666 0667 Info->PrefixNode = DeviceNode; 0668 Info->Pathname = METHOD_NAME__INI; 0669 Info->Parameters = NULL; 0670 Info->Flags = ACPI_IGNORE_RETURN_VALUE; 0671 0672 Status = AcpiNsEvaluate (Info); 0673 if (ACPI_SUCCESS (Status)) 0674 { 0675 WalkInfo->Num_INI++; 0676 0677 if ((AcpiDbgLevel <= ACPI_LV_ALL_EXCEPTIONS) && 0678 (!(AcpiDbgLevel & ACPI_LV_INFO))) 0679 { 0680 ACPI_DEBUG_PRINT_RAW ((ACPI_DB_INIT, ".")); 0681 } 0682 } 0683 0684 #ifdef ACPI_DEBUG_OUTPUT 0685 else if (Status != AE_NOT_FOUND) 0686 { 0687 /* Ignore error and move on to next device */ 0688 0689 char *ScopeName = AcpiNsGetExternalPathname (Info->ResolvedNode); 0690 0691 ACPI_EXCEPTION ((AE_INFO, Status, "during %s._INI execution", 0692 ScopeName)); 0693 ACPI_FREE (ScopeName); 0694 } 0695 #endif 0696 0697 /* Ignore errors from above */ 0698 0699 Status = AE_OK; 0700 0701 /* 0702 * The _INI method has been run if present; call the Global Initialization 0703 * Handler for this device. 0704 */ 0705 if (AcpiGbl_InitHandler) 0706 { 0707 Status = AcpiGbl_InitHandler (DeviceNode, ACPI_INIT_DEVICE_INI); 0708 } 0709 0710 return_ACPI_STATUS (Status); 0711 }
[ Source navigation ] | [ Diff markup ] | [ Identifier search ] | [ general search ] |
This page was automatically generated by the 1.2.0 LXR engine. |