evrgnini.c revision 69450
1/****************************************************************************** 2 * 3 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init 4 * $Revision: 29 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, Intel Corp. All rights 13 * reserved. 14 * 15 * 2. License 16 * 17 * 2.1. This is your license from Intel Corp. under its intellectual property 18 * rights. You may have additional license terms from the party that provided 19 * you this software, covering your right to use that party's intellectual 20 * property rights. 21 * 22 * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a 23 * copy of the source code appearing in this file ("Covered Code") an 24 * irrevocable, perpetual, worldwide license under Intel's copyrights in the 25 * base code distributed originally by Intel ("Original Intel Code") to copy, 26 * make derivatives, distribute, use and display any portion of the Covered 27 * Code in any form, with the right to sublicense such rights; and 28 * 29 * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent 30 * license (with the right to sublicense), under only those claims of Intel 31 * patents that are infringed by the Original Intel Code, to make, use, sell, 32 * offer to sell, and import the Covered Code and derivative works thereof 33 * solely to the minimum extent necessary to exercise the above copyright 34 * license, and in no event shall the patent license extend to any additions 35 * to or modifications of the Original Intel Code. No other license or right 36 * is granted directly or by implication, estoppel or otherwise; 37 * 38 * The above copyright and patent license is granted only if the following 39 * conditions are met: 40 * 41 * 3. Conditions 42 * 43 * 3.1. Redistribution of Source with Rights to Further Distribute Source. 44 * Redistribution of source code of any substantial portion of the Covered 45 * Code or modification with rights to further distribute source must include 46 * the above Copyright Notice, the above License, this list of Conditions, 47 * and the following Disclaimer and Export Compliance provision. In addition, 48 * Licensee must cause all Covered Code to which Licensee contributes to 49 * contain a file documenting the changes Licensee made to create that Covered 50 * Code and the date of any change. Licensee must include in that file the 51 * documentation of any changes made by any predecessor Licensee. Licensee 52 * must include a prominent statement that the modification is derived, 53 * directly or indirectly, from Original Intel Code. 54 * 55 * 3.2. Redistribution of Source with no Rights to Further Distribute Source. 56 * Redistribution of source code of any substantial portion of the Covered 57 * Code or modification without rights to further distribute source must 58 * include the following Disclaimer and Export Compliance provision in the 59 * documentation and/or other materials provided with distribution. In 60 * addition, Licensee may not authorize further sublicense of source of any 61 * portion of the Covered Code, and must include terms to the effect that the 62 * license from Licensee to its licensee is limited to the intellectual 63 * property embodied in the software Licensee provides to its licensee, and 64 * not to intellectual property embodied in modifications its licensee may 65 * make. 66 * 67 * 3.3. Redistribution of Executable. Redistribution in executable form of any 68 * substantial portion of the Covered Code or modification must reproduce the 69 * above Copyright Notice, and the following Disclaimer and Export Compliance 70 * provision in the documentation and/or other materials provided with the 71 * distribution. 72 * 73 * 3.4. Intel retains all right, title, and interest in and to the Original 74 * Intel Code. 75 * 76 * 3.5. Neither the name Intel nor any other trademark owned or controlled by 77 * Intel shall be used in advertising or otherwise to promote the sale, use or 78 * other dealings in products derived from or relating to the Covered Code 79 * without prior written authorization from Intel. 80 * 81 * 4. Disclaimer and Export Compliance 82 * 83 * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED 84 * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE 85 * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, 86 * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY 87 * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY 88 * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A 89 * PARTICULAR PURPOSE. 90 * 91 * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES 92 * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR 93 * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, 94 * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY 95 * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL 96 * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS 97 * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY 98 * LIMITED REMEDY. 99 * 100 * 4.3. Licensee shall not export, either directly or indirectly, any of this 101 * software or system incorporating such software without first obtaining any 102 * required license or other approval from the U. S. Department of Commerce or 103 * any other agency or department of the United States Government. In the 104 * event Licensee exports any such software from the United States or 105 * re-exports any such software from a foreign destination, Licensee shall 106 * ensure that the distribution and export/re-export of the software is in 107 * compliance with all laws, regulations, orders, or other restrictions of the 108 * U.S. Export Administration Regulations. Licensee agrees that neither it nor 109 * any of its subsidiaries will export/re-export any technical data, process, 110 * software, or service, directly or indirectly, to any country for which the 111 * United States government or any agency thereof requires an export license, 112 * other governmental approval, or letter of assurance, without first obtaining 113 * such license, approval or letter. 114 * 115 *****************************************************************************/ 116 117 118#define __EVRGNINI_C__ 119 120#include "acpi.h" 121#include "acevents.h" 122#include "acnamesp.h" 123#include "acinterp.h" 124#include "amlcode.h" 125 126#define _COMPONENT EVENT_HANDLING 127 MODULE_NAME ("evrgnini") 128 129 130/***************************************************************************** 131 * 132 * FUNCTION: AcpiEvSystemMemoryRegionSetup 133 * 134 * PARAMETERS: RegionObj - region we are interested in 135 * Function - start or stop 136 * HandlerContext - Address space handler context 137 * RegionContext - Region specific context 138 * 139 * RETURN: Status 140 * 141 * DESCRIPTION: Do any prep work for region handling, a nop for now 142 * 143 ****************************************************************************/ 144 145ACPI_STATUS 146AcpiEvSystemMemoryRegionSetup ( 147 ACPI_HANDLE Handle, 148 UINT32 Function, 149 void *HandlerContext, 150 void **RegionContext) 151{ 152 FUNCTION_TRACE ("EvSystemMemoryRegionSetup"); 153 154 155 if (Function == ACPI_REGION_DEACTIVATE) 156 { 157 if (*RegionContext) 158 { 159 AcpiCmFree (*RegionContext); 160 *RegionContext = NULL; 161 } 162 return_ACPI_STATUS (AE_OK); 163 } 164 165 166 /* Activate. Create a new context */ 167 168 *RegionContext = AcpiCmCallocate (sizeof (MEM_HANDLER_CONTEXT)); 169 if (!(*RegionContext)) 170 { 171 return_ACPI_STATUS (AE_NO_MEMORY); 172 } 173 174 return_ACPI_STATUS (AE_OK); 175} 176 177 178/***************************************************************************** 179 * 180 * FUNCTION: AcpiEvIoSpaceRegionSetup 181 * 182 * PARAMETERS: RegionObj - region we are interested in 183 * Function - start or stop 184 * HandlerContext - Address space handler context 185 * RegionContext - Region specific context 186 * 187 * RETURN: Status 188 * 189 * DESCRIPTION: Do any prep work for region handling 190 * 191 ****************************************************************************/ 192 193ACPI_STATUS 194AcpiEvIoSpaceRegionSetup ( 195 ACPI_HANDLE Handle, 196 UINT32 Function, 197 void *HandlerContext, 198 void **RegionContext) 199{ 200 FUNCTION_TRACE ("EvIoSpaceRegionSetup"); 201 202 if (Function == ACPI_REGION_DEACTIVATE) 203 { 204 *RegionContext = NULL; 205 } 206 else 207 { 208 *RegionContext = HandlerContext; 209 } 210 211 return_ACPI_STATUS (AE_OK); 212} 213 214 215/***************************************************************************** 216 * 217 * FUNCTION: AcpiEvPciConfigRegionSetup 218 * 219 * PARAMETERS: RegionObj - region we are interested in 220 * Function - start or stop 221 * HandlerContext - Address space handler context 222 * RegionContext - Region specific context 223 * 224 * RETURN: Status 225 * 226 * DESCRIPTION: Do any prep work for region handling 227 * 228 * MUTEX: Assumes namespace is not locked 229 * 230 ****************************************************************************/ 231 232ACPI_STATUS 233AcpiEvPciConfigRegionSetup ( 234 ACPI_HANDLE Handle, 235 UINT32 Function, 236 void *HandlerContext, 237 void **RegionContext) 238{ 239 ACPI_STATUS Status = AE_OK; 240 ACPI_INTEGER Temp; 241 PCI_HANDLER_CONTEXT *PciContext = *RegionContext; 242 ACPI_OPERAND_OBJECT *HandlerObj; 243 ACPI_NAMESPACE_NODE *Node; 244 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 245 DEVICE_ID ObjectHID; 246 247 FUNCTION_TRACE ("EvPciConfigRegionSetup"); 248 249 HandlerObj = RegionObj->Region.AddrHandler; 250 251 if (!HandlerObj) 252 { 253 /* 254 * No installed handler. This shouldn't happen because the dispatch 255 * routine checks before we get here, but we check again just in case. 256 */ 257 DEBUG_PRINT (TRACE_OPREGION, 258 ("Attempting to init a region 0x%X, with no handler\n", RegionObj)); 259 return_ACPI_STATUS(AE_NOT_EXIST); 260 } 261 262 if (Function == ACPI_REGION_DEACTIVATE) 263 { 264 if (PciContext) 265 { 266 AcpiCmFree (PciContext); 267 *RegionContext = NULL; 268 } 269 270 return_ACPI_STATUS (Status); 271 } 272 273 274 /* Create a new context */ 275 276 PciContext = AcpiCmCallocate (sizeof(PCI_HANDLER_CONTEXT)); 277 if (!PciContext) 278 { 279 return_ACPI_STATUS (AE_NO_MEMORY); 280 } 281 282 /* 283 * For PCI Config space access, we have to pass the segment, bus, 284 * device and function numbers. This routine must acquire those. 285 */ 286 287 /* 288 * First get device and function numbers from the _ADR object 289 * in the parent's scope. 290 */ 291 ACPI_ASSERT(RegionObj->Region.Node); 292 293 Node = AcpiNsGetParentObject (RegionObj->Region.Node); 294 295 296 /* AcpiEvaluate the _ADR object */ 297 298 Status = AcpiCmEvaluateNumericObject (METHOD_NAME__ADR, Node, &Temp); 299 /* 300 * The default is zero, since the allocation above zeroed the data, just 301 * do nothing on failures. 302 */ 303 if (ACPI_SUCCESS (Status)) 304 { 305 /* 306 * Got it.. 307 */ 308 PciContext->DevFunc = (UINT32) Temp; 309 } 310 311 /* 312 * Get the _SEG and _BBN values from the device upon which the handler 313 * is installed. 314 * 315 * We need to get the _SEG and _BBN objects relative to the PCI BUS device. 316 * This is the device the handler has been registered to handle. 317 */ 318 319 /* 320 * If the AddrHandler.Node is still pointing to the root, we need 321 * to scan upward for a PCI Root bridge and re-associate the OpRegion 322 * handlers with that device. 323 */ 324 if (HandlerObj->AddrHandler.Node == AcpiGbl_RootNode) 325 { 326 /* 327 * Node is currently the parent object 328 */ 329 while (Node != AcpiGbl_RootNode) 330 { 331 Status = AcpiCmExecute_HID(Node, &ObjectHID); 332 333 if (ACPI_SUCCESS (Status)) 334 { 335 if (!(STRNCMP(ObjectHID.Buffer, PCI_ROOT_HID_STRING, 336 sizeof (PCI_ROOT_HID_STRING)))) 337 { 338 AcpiInstallAddressSpaceHandler(Node, 339 ADDRESS_SPACE_PCI_CONFIG, 340 ACPI_DEFAULT_HANDLER, NULL, NULL); 341 342 break; 343 } 344 } 345 346 Node = AcpiNsGetParentObject(Node); 347 } 348 } 349 else 350 { 351 Node = HandlerObj->AddrHandler.Node; 352 } 353 354 Status = AcpiCmEvaluateNumericObject (METHOD_NAME__SEG, Node, &Temp); 355 if (ACPI_SUCCESS (Status)) 356 { 357 /* 358 * Got it.. 359 */ 360 PciContext->Seg = (UINT32) Temp; 361 } 362 363 Status = AcpiCmEvaluateNumericObject (METHOD_NAME__BBN, Node, &Temp); 364 if (ACPI_SUCCESS (Status)) 365 { 366 /* 367 * Got it.. 368 */ 369 PciContext->Bus = (UINT32) Temp; 370 } 371 372 *RegionContext = PciContext; 373 374 return_ACPI_STATUS (AE_OK); 375} 376 377 378/***************************************************************************** 379 * 380 * FUNCTION: AcpiEvDefaultRegionSetup 381 * 382 * PARAMETERS: RegionObj - region we are interested in 383 * Function - start or stop 384 * HandlerContext - Address space handler context 385 * RegionContext - Region specific context 386 * 387 * RETURN: Status 388 * 389 * DESCRIPTION: Do any prep work for region handling 390 * 391 ****************************************************************************/ 392 393ACPI_STATUS 394AcpiEvDefaultRegionSetup ( 395 ACPI_HANDLE Handle, 396 UINT32 Function, 397 void *HandlerContext, 398 void **RegionContext) 399{ 400 FUNCTION_TRACE ("EvDefaultRegionSetup"); 401 402 if (Function == ACPI_REGION_DEACTIVATE) 403 { 404 *RegionContext = NULL; 405 } 406 else 407 { 408 *RegionContext = HandlerContext; 409 } 410 411 return_ACPI_STATUS (AE_OK); 412} 413 414 415/****************************************************************************** 416 * 417 * FUNCTION: AcpiEvInitializeRegion 418 * 419 * PARAMETERS: RegionObj - Region we are initializing 420 * 421 * RETURN: Status 422 * 423 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 424 * for execution at a later time 425 * 426 * Get the appropriate address space handler for a newly 427 * created region. 428 * 429 * This also performs address space specific intialization. For 430 * example, PCI regions must have an _ADR object that contains 431 * a PCI address in the scope of the defintion. This address is 432 * required to perform an access to PCI config space. 433 * 434 ******************************************************************************/ 435 436ACPI_STATUS 437AcpiEvInitializeRegion ( 438 ACPI_OPERAND_OBJECT *RegionObj, 439 BOOLEAN AcpiNsLocked) 440{ 441 ACPI_OPERAND_OBJECT *HandlerObj; 442 ACPI_OPERAND_OBJECT *ObjDesc; 443 UINT32 SpaceId; 444 ACPI_NAMESPACE_NODE *Node; 445 ACPI_STATUS Status; 446 ACPI_NAMESPACE_NODE *MethodNode; 447 ACPI_NAME *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG; 448 449 450 FUNCTION_TRACE_U32 ("EvInitializeRegion", AcpiNsLocked); 451 452 453 if (!RegionObj) 454 { 455 return_ACPI_STATUS (AE_BAD_PARAMETER); 456 } 457 458 ACPI_ASSERT(RegionObj->Region.Node); 459 460 Node = AcpiNsGetParentObject (RegionObj->Region.Node); 461 SpaceId = RegionObj->Region.SpaceId; 462 463 RegionObj->Region.AddrHandler = NULL; 464 RegionObj->Region.Extra->Extra.Method_REG = NULL; 465 RegionObj->Region.Flags &= ~(AOPOBJ_INITIALIZED); 466 467 /* 468 * Find any "_REG" associated with this region definition 469 */ 470 Status = AcpiNsSearchNode (*RegNamePtr, Node, 471 ACPI_TYPE_METHOD, &MethodNode); 472 if (ACPI_SUCCESS (Status)) 473 { 474 /* 475 * The _REG method is optional and there can be only one per region 476 * definition. This will be executed when the handler is attached 477 * or removed 478 */ 479 RegionObj->Region.Extra->Extra.Method_REG = MethodNode; 480 } 481 482 /* 483 * The following loop depends upon the root Node having no parent 484 * ie: AcpiGbl_RootNode->ParentEntry being set to NULL 485 */ 486 while (Node) 487 { 488 /* 489 * Check to see if a handler exists 490 */ 491 HandlerObj = NULL; 492 ObjDesc = AcpiNsGetAttachedObject ((ACPI_HANDLE) Node); 493 if (ObjDesc) 494 { 495 /* 496 * can only be a handler if the object exists 497 */ 498 switch (Node->Type) 499 { 500 case ACPI_TYPE_DEVICE: 501 502 HandlerObj = ObjDesc->Device.AddrHandler; 503 break; 504 505 case ACPI_TYPE_PROCESSOR: 506 507 HandlerObj = ObjDesc->Processor.AddrHandler; 508 break; 509 510 case ACPI_TYPE_THERMAL: 511 512 HandlerObj = ObjDesc->ThermalZone.AddrHandler; 513 break; 514 } 515 516 while (HandlerObj) 517 { 518 /* 519 * This guy has at least one address handler 520 * see if it has the type we want 521 */ 522 if (HandlerObj->AddrHandler.SpaceId == SpaceId) 523 { 524 DEBUG_PRINT (TRACE_OPREGION, 525 ("Found handler (0x%X) for region 0x%X in obj 0x%X\n", 526 HandlerObj, RegionObj, ObjDesc)); 527 528 /* 529 * Found it! Now update the region and the handler 530 */ 531 AcpiEvAssociateRegionAndHandler (HandlerObj, RegionObj, AcpiNsLocked); 532 return_ACPI_STATUS (AE_OK); 533 } 534 535 HandlerObj = HandlerObj->AddrHandler.Next; 536 537 } /* while handlerobj */ 538 } 539 540 /* 541 * This one does not have the handler we need 542 * Pop up one level 543 */ 544 Node = AcpiNsGetParentObject (Node); 545 546 } /* while Node != ROOT */ 547 548 /* 549 * If we get here, there is no handler for this region 550 */ 551 DEBUG_PRINT (TRACE_OPREGION, 552 ("No handler currently for SpaceId[%d] (Initializing region 0x%X)\n", 553 SpaceId, RegionObj)); 554 555 return_ACPI_STATUS (AE_NOT_EXIST); 556} 557 558