evrgnini.c revision 77424
1/****************************************************************************** 2 * 3 * Module Name: evrgnini- ACPI AddressSpace (OpRegion) init 4 * $Revision: 40 $ 5 * 6 *****************************************************************************/ 7 8/****************************************************************************** 9 * 10 * 1. Copyright Notice 11 * 12 * Some or all of this work - Copyright (c) 1999, 2000, 2001, Intel Corp. 13 * All rights 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 ACPI_EVENTS 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 AcpiUtFree (*RegionContext); 160 *RegionContext = NULL; 161 } 162 return_ACPI_STATUS (AE_OK); 163 } 164 165 166 /* Activate. Create a new context */ 167 168 *RegionContext = AcpiUtCallocate (sizeof (ACPI_MEM_SPACE_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"); 201 202 203 if (Function == ACPI_REGION_DEACTIVATE) 204 { 205 *RegionContext = NULL; 206 } 207 else 208 { 209 *RegionContext = HandlerContext; 210 } 211 212 return_ACPI_STATUS (AE_OK); 213} 214 215 216/******************************************************************************* 217 * 218 * FUNCTION: AcpiEvPciConfigRegionSetup 219 * 220 * PARAMETERS: RegionObj - region we are interested in 221 * Function - start or stop 222 * HandlerContext - Address space handler context 223 * RegionContext - Region specific context 224 * 225 * RETURN: Status 226 * 227 * DESCRIPTION: Do any prep work for region handling 228 * 229 * MUTEX: Assumes namespace is not locked 230 * 231 ******************************************************************************/ 232 233ACPI_STATUS 234AcpiEvPciConfigRegionSetup ( 235 ACPI_HANDLE Handle, 236 UINT32 Function, 237 void *HandlerContext, 238 void **RegionContext) 239{ 240 ACPI_STATUS Status = AE_OK; 241 ACPI_INTEGER Temp; 242 ACPI_PCI_SPACE_CONTEXT *PciContext = *RegionContext; 243 ACPI_OPERAND_OBJECT *HandlerObj; 244 ACPI_NAMESPACE_NODE *Node; 245 ACPI_OPERAND_OBJECT *RegionObj = (ACPI_OPERAND_OBJECT *) Handle; 246 ACPI_DEVICE_ID ObjectHID; 247 248 249 FUNCTION_TRACE ("EvPciConfigRegionSetup"); 250 251 252 HandlerObj = RegionObj->Region.AddrHandler; 253 if (!HandlerObj) 254 { 255 /* 256 * No installed handler. This shouldn't happen because the dispatch 257 * routine checks before we get here, but we check again just in case. 258 */ 259 DEBUG_PRINTP (TRACE_OPREGION, 260 ("Attempting to init a region %X, with no handler\n", RegionObj)); 261 return_ACPI_STATUS (AE_NOT_EXIST); 262 } 263 264 if (Function == ACPI_REGION_DEACTIVATE) 265 { 266 if (PciContext) 267 { 268 AcpiUtFree (PciContext); 269 *RegionContext = NULL; 270 } 271 272 return_ACPI_STATUS (Status); 273 } 274 275 276 /* Create a new context */ 277 278 PciContext = AcpiUtCallocate (sizeof (ACPI_PCI_SPACE_CONTEXT)); 279 if (!PciContext) 280 { 281 return_ACPI_STATUS (AE_NO_MEMORY); 282 } 283 284 /* 285 * For PCI Config space access, we have to pass the segment, bus, 286 * device and function numbers. This routine must acquire those. 287 */ 288 289 /* 290 * First get device and function numbers from the _ADR object 291 * in the parent's scope. 292 */ 293 ACPI_ASSERT (RegionObj->Region.Node); 294 295 Node = AcpiNsGetParentObject (RegionObj->Region.Node); 296 297 298 /* AcpiEvaluate the _ADR object */ 299 300 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__ADR, Node, &Temp); 301 302 /* 303 * The default is zero, since the allocation above zeroed the data, just 304 * do nothing on failures. 305 */ 306 if (ACPI_SUCCESS (Status)) 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 = AcpiUtExecute_HID (Node, &ObjectHID); 332 if (ACPI_SUCCESS (Status)) 333 { 334 if (!(STRNCMP (ObjectHID.Buffer, PCI_ROOT_HID_STRING, 335 sizeof (PCI_ROOT_HID_STRING)))) 336 { 337 AcpiInstallAddressSpaceHandler (Node, 338 ACPI_ADR_SPACE_PCI_CONFIG, 339 ACPI_DEFAULT_HANDLER, NULL, NULL); 340 break; 341 } 342 } 343 344 Node = AcpiNsGetParentObject (Node); 345 } 346 } 347 else 348 { 349 Node = HandlerObj->AddrHandler.Node; 350 } 351 352 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__SEG, Node, &Temp); 353 if (ACPI_SUCCESS (Status)) 354 { 355 PciContext->Seg = (UINT32) Temp; 356 } 357 358 Status = AcpiUtEvaluateNumericObject (METHOD_NAME__BBN, Node, &Temp); 359 if (ACPI_SUCCESS (Status)) 360 { 361 PciContext->Bus = (UINT32) Temp; 362 } 363 364 *RegionContext = PciContext; 365 366 return_ACPI_STATUS (AE_OK); 367} 368 369 370/******************************************************************************* 371 * 372 * FUNCTION: AcpiEvDefaultRegionSetup 373 * 374 * PARAMETERS: RegionObj - region we are interested in 375 * Function - start or stop 376 * HandlerContext - Address space handler context 377 * RegionContext - Region specific context 378 * 379 * RETURN: Status 380 * 381 * DESCRIPTION: Do any prep work for region handling 382 * 383 ******************************************************************************/ 384 385ACPI_STATUS 386AcpiEvDefaultRegionSetup ( 387 ACPI_HANDLE Handle, 388 UINT32 Function, 389 void *HandlerContext, 390 void **RegionContext) 391{ 392 FUNCTION_TRACE ("EvDefaultRegionSetup"); 393 394 395 if (Function == ACPI_REGION_DEACTIVATE) 396 { 397 *RegionContext = NULL; 398 } 399 else 400 { 401 *RegionContext = HandlerContext; 402 } 403 404 return_ACPI_STATUS (AE_OK); 405} 406 407 408/******************************************************************************* 409 * 410 * FUNCTION: AcpiEvInitializeRegion 411 * 412 * PARAMETERS: RegionObj - Region we are initializing 413 * 414 * RETURN: Status 415 * 416 * DESCRIPTION: Initializes the region, finds any _REG methods and saves them 417 * for execution at a later time 418 * 419 * Get the appropriate address space handler for a newly 420 * created region. 421 * 422 * This also performs address space specific intialization. For 423 * example, PCI regions must have an _ADR object that contains 424 * a PCI address in the scope of the definition. This address is 425 * required to perform an access to PCI config space. 426 * 427 ******************************************************************************/ 428 429ACPI_STATUS 430AcpiEvInitializeRegion ( 431 ACPI_OPERAND_OBJECT *RegionObj, 432 BOOLEAN AcpiNsLocked) 433{ 434 ACPI_OPERAND_OBJECT *HandlerObj; 435 ACPI_OPERAND_OBJECT *ObjDesc; 436 ACPI_ADR_SPACE_TYPE SpaceId; 437 ACPI_NAMESPACE_NODE *Node; 438 ACPI_STATUS Status; 439 ACPI_NAMESPACE_NODE *MethodNode; 440 ACPI_NAME *RegNamePtr = (ACPI_NAME *) METHOD_NAME__REG; 441 442 443 FUNCTION_TRACE_U32 ("EvInitializeRegion", AcpiNsLocked); 444 445 446 if (!RegionObj) 447 { 448 return_ACPI_STATUS (AE_BAD_PARAMETER); 449 } 450 451 ACPI_ASSERT (RegionObj->Region.Node); 452 453 Node = AcpiNsGetParentObject (RegionObj->Region.Node); 454 SpaceId = RegionObj->Region.SpaceId; 455 456 RegionObj->Region.AddrHandler = NULL; 457 RegionObj->Region.Extra->Extra.Method_REG = NULL; 458 RegionObj->Region.Flags &= ~(AOPOBJ_INITIALIZED); 459 460 /* 461 * Find any "_REG" associated with this region definition 462 */ 463 Status = AcpiNsSearchNode (*RegNamePtr, Node, 464 ACPI_TYPE_METHOD, &MethodNode); 465 if (ACPI_SUCCESS (Status)) 466 { 467 /* 468 * The _REG method is optional and there can be only one per region 469 * definition. This will be executed when the handler is attached 470 * or removed 471 */ 472 RegionObj->Region.Extra->Extra.Method_REG = MethodNode; 473 } 474 475 /* 476 * The following loop depends upon the root Node having no parent 477 * ie: AcpiGbl_RootNode->ParentEntry being set to NULL 478 */ 479 while (Node) 480 { 481 /* 482 * Check to see if a handler exists 483 */ 484 HandlerObj = NULL; 485 ObjDesc = AcpiNsGetAttachedObject (Node); 486 if (ObjDesc) 487 { 488 /* 489 * can only be a handler if the object exists 490 */ 491 switch (Node->Type) 492 { 493 case ACPI_TYPE_DEVICE: 494 495 HandlerObj = ObjDesc->Device.AddrHandler; 496 break; 497 498 case ACPI_TYPE_PROCESSOR: 499 500 HandlerObj = ObjDesc->Processor.AddrHandler; 501 break; 502 503 case ACPI_TYPE_THERMAL: 504 505 HandlerObj = ObjDesc->ThermalZone.AddrHandler; 506 break; 507 } 508 509 while (HandlerObj) 510 { 511 /* 512 * This guy has at least one address handler 513 * see if it has the type we want 514 */ 515 if (HandlerObj->AddrHandler.SpaceId == SpaceId) 516 { 517 DEBUG_PRINTP (TRACE_OPREGION, 518 ("Found handler %p for region %p in obj %p\n", 519 HandlerObj, RegionObj, ObjDesc)); 520 521 /* 522 * Found it! Now update the region and the handler 523 */ 524 AcpiEvAssociateRegionAndHandler (HandlerObj, RegionObj, 525 AcpiNsLocked); 526 return_ACPI_STATUS (AE_OK); 527 } 528 529 HandlerObj = HandlerObj->AddrHandler.Next; 530 531 } /* while handlerobj */ 532 } 533 534 /* 535 * This one does not have the handler we need 536 * Pop up one level 537 */ 538 Node = AcpiNsGetParentObject (Node); 539 540 } /* while Node != ROOT */ 541 542 /* 543 * If we get here, there is no handler for this region 544 */ 545 DEBUG_PRINTP (TRACE_OPREGION, 546 ("No handler for RegionType %s(%X) (RegionObj %p)\n", 547 AcpiUtGetRegionName (SpaceId), SpaceId, RegionObj)); 548 549 return_ACPI_STATUS (AE_NOT_EXIST); 550} 551 552