dmrestag.c revision 250838
1/****************************************************************************** 2 * 3 * Module Name: dmrestag - Add tags to resource descriptors (Application-level) 4 * 5 *****************************************************************************/ 6 7/* 8 * Copyright (C) 2000 - 2013, Intel Corp. 9 * All rights reserved. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions, and the following disclaimer, 16 * without modification. 17 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 18 * substantially similar to the "NO WARRANTY" disclaimer below 19 * ("Disclaimer") and any redistribution must be conditioned upon 20 * including a substantially similar Disclaimer requirement for further 21 * binary redistribution. 22 * 3. Neither the names of the above-listed copyright holders nor the names 23 * of any contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * Alternatively, this software may be distributed under the terms of the 27 * GNU General Public License ("GPL") version 2 as published by the Free 28 * Software Foundation. 29 * 30 * NO WARRANTY 31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 35 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 36 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 37 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 38 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 39 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 40 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 41 * POSSIBILITY OF SUCH DAMAGES. 42 */ 43 44 45#include <contrib/dev/acpica/include/acpi.h> 46#include <contrib/dev/acpica/include/accommon.h> 47#include <contrib/dev/acpica/include/acparser.h> 48#include <contrib/dev/acpica/include/acdisasm.h> 49#include <contrib/dev/acpica/include/acnamesp.h> 50#include <contrib/dev/acpica/include/amlcode.h> 51 52/* This module used for application-level code only */ 53 54#define _COMPONENT ACPI_CA_DISASSEMBLER 55 ACPI_MODULE_NAME ("dmrestag") 56 57/* Local prototypes */ 58 59static void 60AcpiDmUpdateResourceName ( 61 ACPI_NAMESPACE_NODE *ResourceNode); 62 63static char * 64AcpiDmSearchTagList ( 65 UINT32 BitIndex, 66 const ACPI_RESOURCE_TAG *TagList); 67 68static char * 69AcpiDmGetResourceTag ( 70 UINT32 BitIndex, 71 AML_RESOURCE *Resource, 72 UINT8 ResourceIndex); 73 74static char * 75AcpiGetTagPathname ( 76 ACPI_PARSE_OBJECT *Op, 77 ACPI_NAMESPACE_NODE *BufferNode, 78 ACPI_NAMESPACE_NODE *ResourceNode, 79 UINT32 BitIndex); 80 81static ACPI_NAMESPACE_NODE * 82AcpiDmGetResourceNode ( 83 ACPI_NAMESPACE_NODE *BufferNode, 84 UINT32 BitIndex); 85 86static ACPI_STATUS 87AcpiDmAddResourceToNamespace ( 88 UINT8 *Aml, 89 UINT32 Length, 90 UINT32 Offset, 91 UINT8 ResourceIndex, 92 void **Context); 93 94static void 95AcpiDmAddResourcesToNamespace ( 96 ACPI_NAMESPACE_NODE *BufferNode, 97 ACPI_PARSE_OBJECT *Op); 98 99 100/****************************************************************************** 101 * 102 * Resource Tag tables 103 * 104 * These are the predefined tags that refer to elements of a resource 105 * descriptor. Each name and offset is defined in the ACPI specification. 106 * 107 * Each table entry contains the bit offset of the field and the associated 108 * name. 109 * 110 ******************************************************************************/ 111 112static const ACPI_RESOURCE_TAG AcpiDmIrqTags[] = 113{ 114 {( 1 * 8), ACPI_RESTAG_INTERRUPT}, 115 {( 3 * 8) + 0, ACPI_RESTAG_INTERRUPTTYPE}, 116 {( 3 * 8) + 3, ACPI_RESTAG_INTERRUPTLEVEL}, 117 {( 3 * 8) + 4, ACPI_RESTAG_INTERRUPTSHARE}, 118 {0, NULL} 119}; 120 121static const ACPI_RESOURCE_TAG AcpiDmDmaTags[] = 122{ 123 {( 1 * 8), ACPI_RESTAG_DMA}, 124 {( 2 * 8) + 0, ACPI_RESTAG_XFERTYPE}, 125 {( 2 * 8) + 2, ACPI_RESTAG_BUSMASTER}, 126 {( 2 * 8) + 5, ACPI_RESTAG_DMATYPE}, 127 {0, NULL} 128}; 129 130static const ACPI_RESOURCE_TAG AcpiDmIoTags[] = 131{ 132 {( 1 * 8) + 0, ACPI_RESTAG_DECODE}, 133 {( 2 * 8), ACPI_RESTAG_MINADDR}, 134 {( 4 * 8), ACPI_RESTAG_MAXADDR}, 135 {( 6 * 8), ACPI_RESTAG_ALIGNMENT}, 136 {( 7 * 8), ACPI_RESTAG_LENGTH}, 137 {0, NULL} 138}; 139 140static const ACPI_RESOURCE_TAG AcpiDmFixedIoTags[] = 141{ 142 {( 1 * 8), ACPI_RESTAG_BASEADDRESS}, 143 {( 3 * 8), ACPI_RESTAG_LENGTH}, 144 {0, NULL} 145}; 146 147static const ACPI_RESOURCE_TAG AcpiDmFixedDmaTags[] = 148{ 149 {( 1 * 8), ACPI_RESTAG_DMA}, 150 {( 3 * 8), ACPI_RESTAG_DMATYPE}, 151 {( 5 * 8), ACPI_RESTAG_XFERTYPE}, 152 {0, NULL} 153}; 154 155static const ACPI_RESOURCE_TAG AcpiDmMemory24Tags[] = 156{ 157 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 158 {( 4 * 8), ACPI_RESTAG_MINADDR}, 159 {( 6 * 8), ACPI_RESTAG_MAXADDR}, 160 {( 8 * 8), ACPI_RESTAG_ALIGNMENT}, 161 {(10 * 8), ACPI_RESTAG_LENGTH}, 162 {0, NULL} 163}; 164 165static const ACPI_RESOURCE_TAG AcpiDmRegisterTags[] = 166{ 167 {( 3 * 8), ACPI_RESTAG_ADDRESSSPACE}, 168 {( 4 * 8), ACPI_RESTAG_REGISTERBITWIDTH}, 169 {( 5 * 8), ACPI_RESTAG_REGISTERBITOFFSET}, 170 {( 6 * 8), ACPI_RESTAG_ACCESSSIZE}, 171 {( 7 * 8), ACPI_RESTAG_ADDRESS}, 172 {0, NULL} 173}; 174 175static const ACPI_RESOURCE_TAG AcpiDmMemory32Tags[] = 176{ 177 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 178 {( 4 * 8), ACPI_RESTAG_MINADDR}, 179 {( 8 * 8), ACPI_RESTAG_MAXADDR}, 180 {(12 * 8), ACPI_RESTAG_ALIGNMENT}, 181 {(16 * 8), ACPI_RESTAG_LENGTH}, 182 {0, NULL} 183}; 184 185static const ACPI_RESOURCE_TAG AcpiDmFixedMemory32Tags[] = 186{ 187 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 188 {( 4 * 8), ACPI_RESTAG_BASEADDRESS}, 189 {( 8 * 8), ACPI_RESTAG_LENGTH}, 190 {0, NULL} 191}; 192 193static const ACPI_RESOURCE_TAG AcpiDmInterruptTags[] = 194{ 195 {( 3 * 8) + 1, ACPI_RESTAG_INTERRUPTTYPE}, 196 {( 3 * 8) + 2, ACPI_RESTAG_INTERRUPTLEVEL}, 197 {( 3 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 198 {( 5 * 8), ACPI_RESTAG_INTERRUPT}, 199 {0, NULL} 200}; 201 202static const ACPI_RESOURCE_TAG AcpiDmAddress16Tags[] = 203{ 204 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 205 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 206 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 207 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 208 {( 8 * 8), ACPI_RESTAG_MINADDR}, 209 {(10 * 8), ACPI_RESTAG_MAXADDR}, 210 {(12 * 8), ACPI_RESTAG_TRANSLATION}, 211 {(14 * 8), ACPI_RESTAG_LENGTH}, 212 {0, NULL} 213}; 214 215static const ACPI_RESOURCE_TAG AcpiDmAddress32Tags[] = 216{ 217 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 218 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 219 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 220 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 221 {(10 * 8), ACPI_RESTAG_MINADDR}, 222 {(14 * 8), ACPI_RESTAG_MAXADDR}, 223 {(18 * 8), ACPI_RESTAG_TRANSLATION}, 224 {(22 * 8), ACPI_RESTAG_LENGTH}, 225 {0, NULL} 226}; 227 228static const ACPI_RESOURCE_TAG AcpiDmAddress64Tags[] = 229{ 230 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 231 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 232 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 233 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 234 {(14 * 8), ACPI_RESTAG_MINADDR}, 235 {(22 * 8), ACPI_RESTAG_MAXADDR}, 236 {(30 * 8), ACPI_RESTAG_TRANSLATION}, 237 {(38 * 8), ACPI_RESTAG_LENGTH}, 238 {0, NULL} 239}; 240 241static const ACPI_RESOURCE_TAG AcpiDmExtendedAddressTags[] = 242{ 243 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 244 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 245 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 246 {( 8 * 8), ACPI_RESTAG_GRANULARITY}, 247 {(16 * 8), ACPI_RESTAG_MINADDR}, 248 {(24 * 8), ACPI_RESTAG_MAXADDR}, 249 {(32 * 8), ACPI_RESTAG_TRANSLATION}, 250 {(40 * 8), ACPI_RESTAG_LENGTH}, 251 {(48 * 8), ACPI_RESTAG_TYPESPECIFICATTRIBUTES}, 252 {0, NULL} 253}; 254 255/* Subtype tables for GPIO descriptors */ 256 257static const ACPI_RESOURCE_TAG AcpiDmGpioIntTags[] = 258{ 259 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 260 {( 7 * 8) + 1, ACPI_RESTAG_POLARITY}, 261 {( 7 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 262 {( 9 * 8), ACPI_RESTAG_PINCONFIG}, 263 {(10 * 8), ACPI_RESTAG_DRIVESTRENGTH}, 264 {(12 * 8), ACPI_RESTAG_DEBOUNCETIME}, 265 {0, NULL} 266}; 267 268static const ACPI_RESOURCE_TAG AcpiDmGpioIoTags[] = 269{ 270 {( 7 * 8) + 0, ACPI_RESTAG_IORESTRICTION}, 271 {( 7 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 272 {( 9 * 8), ACPI_RESTAG_PINCONFIG}, 273 {(10 * 8), ACPI_RESTAG_DRIVESTRENGTH}, 274 {(12 * 8), ACPI_RESTAG_DEBOUNCETIME}, 275 {0, NULL} 276}; 277 278/* Subtype tables for SerialBus descriptors */ 279 280static const ACPI_RESOURCE_TAG AcpiDmI2cSerialBusTags[] = 281{ 282 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, 283 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 284 {(12 * 8), ACPI_RESTAG_SPEED}, 285 {(16 * 8), ACPI_RESTAG_ADDRESS}, 286 {0, NULL} 287}; 288 289static const ACPI_RESOURCE_TAG AcpiDmSpiSerialBusTags[] = 290{ 291 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, 292 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 293 {( 7 * 8) + 1, ACPI_RESTAG_DEVICEPOLARITY}, 294 {(12 * 8), ACPI_RESTAG_SPEED}, 295 {(16 * 8), ACPI_RESTAG_LENGTH}, 296 {(17 * 8), ACPI_RESTAG_PHASE}, 297 {(18 * 8), ACPI_RESTAG_POLARITY}, 298 {(19 * 8), ACPI_RESTAG_ADDRESS}, 299 {0, NULL} 300}; 301 302static const ACPI_RESOURCE_TAG AcpiDmUartSerialBusTags[] = 303{ 304 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, /* Note: not part of original macro */ 305 {( 7 * 8) + 0, ACPI_RESTAG_FLOWCONTROL}, 306 {( 7 * 8) + 2, ACPI_RESTAG_STOPBITS}, 307 {( 7 * 8) + 4, ACPI_RESTAG_LENGTH}, 308 {( 7 * 8) + 7, ACPI_RESTAG_ENDIANNESS}, 309 {(12 * 8), ACPI_RESTAG_SPEED}, 310 {(16 * 8), ACPI_RESTAG_LENGTH_RX}, 311 {(18 * 8), ACPI_RESTAG_LENGTH_TX}, 312 {(20 * 8), ACPI_RESTAG_PARITY}, 313 {(21 * 8), ACPI_RESTAG_LINE}, 314 {0, NULL} 315}; 316 317/* Subtype tables for Address descriptor type-specific flags */ 318 319static const ACPI_RESOURCE_TAG AcpiDmMemoryFlagTags[] = 320{ 321 {( 5 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 322 {( 5 * 8) + 1, ACPI_RESTAG_MEMTYPE}, 323 {( 5 * 8) + 3, ACPI_RESTAG_MEMATTRIBUTES}, 324 {( 5 * 8) + 5, ACPI_RESTAG_TYPE}, 325 {0, NULL} 326}; 327 328static const ACPI_RESOURCE_TAG AcpiDmIoFlagTags[] = 329{ 330 {( 5 * 8) + 0, ACPI_RESTAG_RANGETYPE}, 331 {( 5 * 8) + 4, ACPI_RESTAG_TYPE}, 332 {( 5 * 8) + 5, ACPI_RESTAG_TRANSTYPE}, 333 {0, NULL} 334}; 335 336 337/* 338 * Dispatch table used to obtain the correct tag table for a descriptor. 339 * 340 * A NULL in this table means one of three things: 341 * 1) The descriptor ID is reserved and invalid 342 * 2) The descriptor has no tags associated with it 343 * 3) The descriptor has subtypes and a separate table will be used. 344 */ 345static const ACPI_RESOURCE_TAG *AcpiGbl_ResourceTags[] = 346{ 347 /* Small descriptors */ 348 349 NULL, /* 0x00, Reserved */ 350 NULL, /* 0x01, Reserved */ 351 NULL, /* 0x02, Reserved */ 352 NULL, /* 0x03, Reserved */ 353 AcpiDmIrqTags, /* 0x04, ACPI_RESOURCE_NAME_IRQ_FORMAT */ 354 AcpiDmDmaTags, /* 0x05, ACPI_RESOURCE_NAME_DMA_FORMAT */ 355 NULL, /* 0x06, ACPI_RESOURCE_NAME_START_DEPENDENT */ 356 NULL, /* 0x07, ACPI_RESOURCE_NAME_END_DEPENDENT */ 357 AcpiDmIoTags, /* 0x08, ACPI_RESOURCE_NAME_IO_PORT */ 358 AcpiDmFixedIoTags, /* 0x09, ACPI_RESOURCE_NAME_FIXED_IO_PORT */ 359 AcpiDmFixedDmaTags, /* 0x0A, ACPI_RESOURCE_NAME_FIXED_DMA */ 360 NULL, /* 0x0B, Reserved */ 361 NULL, /* 0x0C, Reserved */ 362 NULL, /* 0x0D, Reserved */ 363 NULL, /* 0x0E, ACPI_RESOURCE_NAME_SMALL_VENDOR */ 364 NULL, /* 0x0F, ACPI_RESOURCE_NAME_END_TAG (not used) */ 365 366 /* Large descriptors */ 367 368 NULL, /* 0x00, Reserved */ 369 AcpiDmMemory24Tags, /* 0x01, ACPI_RESOURCE_NAME_MEMORY_24 */ 370 AcpiDmRegisterTags, /* 0x02, ACPI_RESOURCE_NAME_GENERIC_REGISTER */ 371 NULL, /* 0x03, Reserved */ 372 NULL, /* 0x04, ACPI_RESOURCE_NAME_LARGE_VENDOR */ 373 AcpiDmMemory32Tags, /* 0x05, ACPI_RESOURCE_NAME_MEMORY_32 */ 374 AcpiDmFixedMemory32Tags, /* 0x06, ACPI_RESOURCE_NAME_FIXED_MEMORY_32 */ 375 AcpiDmAddress32Tags, /* 0x07, ACPI_RESOURCE_NAME_DWORD_ADDRESS_SPACE */ 376 AcpiDmAddress16Tags, /* 0x08, ACPI_RESOURCE_NAME_WORD_ADDRESS_SPACE */ 377 AcpiDmInterruptTags, /* 0x09, ACPI_RESOURCE_NAME_EXTENDED_XRUPT */ 378 AcpiDmAddress64Tags, /* 0x0A, ACPI_RESOURCE_NAME_QWORD_ADDRESS_SPACE */ 379 AcpiDmExtendedAddressTags, /* 0x0B, ACPI_RESOURCE_NAME_EXTENDED_ADDRESS_SPACE */ 380 NULL, /* 0x0C, ACPI_RESOURCE_NAME_GPIO - Use Subtype table below */ 381 NULL, /* 0x0D, Reserved */ 382 NULL /* 0x0E, ACPI_RESOURCE_NAME_SERIAL_BUS - Use Subtype table below */ 383}; 384 385/* GPIO Subtypes */ 386 387static const ACPI_RESOURCE_TAG *AcpiGbl_GpioResourceTags[] = 388{ 389 AcpiDmGpioIntTags, /* 0x00 Interrupt Connection */ 390 AcpiDmGpioIoTags /* 0x01 I/O Connection */ 391}; 392 393/* Serial Bus Subtypes */ 394 395static const ACPI_RESOURCE_TAG *AcpiGbl_SerialResourceTags[] = 396{ 397 NULL, /* 0x00 Reserved */ 398 AcpiDmI2cSerialBusTags, /* 0x01 I2C SerialBus */ 399 AcpiDmSpiSerialBusTags, /* 0x02 SPI SerialBus */ 400 AcpiDmUartSerialBusTags /* 0x03 UART SerialBus */ 401}; 402 403/* 404 * Globals used to generate unique resource descriptor names. We use names that 405 * start with underscore and a prefix letter that is not used by other ACPI 406 * reserved names. To this, we append hex 0x00 through 0xFF. These 5 prefixes 407 * allow for 5*256 = 1280 unique names, probably sufficient for any single ASL 408 * file. If this becomes too small, we can use alpha+numerals for a total 409 * of 5*36*36 = 6480. 410 */ 411#define ACPI_NUM_RES_PREFIX 5 412 413static UINT32 AcpiGbl_NextResourceId = 0; 414static UINT8 AcpiGbl_NextPrefix = 0; 415static char AcpiGbl_Prefix[ACPI_NUM_RES_PREFIX] = 416 {'Y','Z','J','K','X'}; 417 418 419/******************************************************************************* 420 * 421 * FUNCTION: AcpiDmCheckResourceReference 422 * 423 * PARAMETERS: Op - Parse Op for the AML opcode 424 * WalkState - Current walk state (with valid scope) 425 * 426 * RETURN: None 427 * 428 * DESCRIPTION: Convert a reference to a resource descriptor to a symbolic 429 * reference if possible 430 * 431 * NOTE: Bit index is used to transparently handle both resource bit 432 * fields and byte fields. 433 * 434 ******************************************************************************/ 435 436void 437AcpiDmCheckResourceReference ( 438 ACPI_PARSE_OBJECT *Op, 439 ACPI_WALK_STATE *WalkState) 440{ 441 ACPI_STATUS Status; 442 ACPI_PARSE_OBJECT *BufferNameOp; 443 ACPI_PARSE_OBJECT *IndexOp; 444 ACPI_NAMESPACE_NODE *BufferNode; 445 ACPI_NAMESPACE_NODE *ResourceNode; 446 const ACPI_OPCODE_INFO *OpInfo; 447 UINT32 BitIndex; 448 449 450 /* We are only interested in the CreateXxxxField opcodes */ 451 452 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 453 if (OpInfo->Type != AML_TYPE_CREATE_FIELD) 454 { 455 return; 456 } 457 458 /* Get the buffer term operand */ 459 460 BufferNameOp = AcpiPsGetDepthNext (NULL, Op); 461 462 /* Must be a named buffer, not an arg or local or method call */ 463 464 if (BufferNameOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP) 465 { 466 return; 467 } 468 469 /* Get the Index term, must be an integer constant to convert */ 470 471 IndexOp = BufferNameOp->Common.Next; 472 473 /* Major cheat: The Node field is also used for the Tag ptr. Clear it now */ 474 475 IndexOp->Common.Node = NULL; 476 477 OpInfo = AcpiPsGetOpcodeInfo (IndexOp->Common.AmlOpcode); 478 if (OpInfo->ObjectType != ACPI_TYPE_INTEGER) 479 { 480 return; 481 } 482 483 /* Get the bit offset of the descriptor within the buffer */ 484 485 if ((Op->Common.AmlOpcode == AML_CREATE_BIT_FIELD_OP) || 486 (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)) 487 { 488 /* Index operand is a bit offset */ 489 490 BitIndex = (UINT32) IndexOp->Common.Value.Integer; 491 } 492 else 493 { 494 /* Index operand is a byte offset, convert to bits */ 495 496 BitIndex = (UINT32) ACPI_MUL_8 (IndexOp->Common.Value.Integer); 497 } 498 499 /* Lookup the buffer in the namespace */ 500 501 Status = AcpiNsLookup (WalkState->ScopeInfo, 502 BufferNameOp->Common.Value.String, ACPI_TYPE_BUFFER, 503 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, 504 &BufferNode); 505 if (ACPI_FAILURE (Status)) 506 { 507 return; 508 } 509 510 /* Validate object type, we must have a buffer */ 511 512 if (BufferNode->Type != ACPI_TYPE_BUFFER) 513 { 514 return; 515 } 516 517 /* Find the resource descriptor node corresponding to the index */ 518 519 ResourceNode = AcpiDmGetResourceNode (BufferNode, BitIndex); 520 if (!ResourceNode) 521 { 522 return; 523 } 524 525 /* Translate the Index to a resource tag pathname */ 526 527 AcpiGetTagPathname (IndexOp, BufferNode, ResourceNode, BitIndex); 528} 529 530 531/******************************************************************************* 532 * 533 * FUNCTION: AcpiDmGetResourceNode 534 * 535 * PARAMETERS: BufferNode - Node for the parent buffer 536 * BitIndex - Index into the resource descriptor 537 * 538 * RETURN: Namespace node for the resource descriptor. NULL if not found 539 * 540 * DESCRIPTION: Find a resource descriptor that corresponds to the bit index 541 * 542 ******************************************************************************/ 543 544static ACPI_NAMESPACE_NODE * 545AcpiDmGetResourceNode ( 546 ACPI_NAMESPACE_NODE *BufferNode, 547 UINT32 BitIndex) 548{ 549 ACPI_NAMESPACE_NODE *Node; 550 UINT32 ByteIndex = ACPI_DIV_8 (BitIndex); 551 552 553 /* 554 * Child list contains an entry for each resource descriptor. Find 555 * the descriptor that corresponds to the Index. 556 * 557 * If there are no children, this is not a resource template 558 */ 559 Node = BufferNode->Child; 560 while (Node) 561 { 562 /* 563 * Check if the Index falls within this resource. 564 * 565 * Value contains the resource offset, Object contains the resource 566 * length (both in bytes) 567 */ 568 if ((ByteIndex >= Node->Value) && 569 (ByteIndex < (Node->Value + Node->Length))) 570 { 571 return (Node); 572 } 573 574 Node = Node->Peer; 575 } 576 577 return (NULL); 578} 579 580 581/******************************************************************************* 582 * 583 * FUNCTION: AcpiGetTagPathname 584 * 585 * PARAMETERS: BufferNode - Node for the parent buffer 586 * ResourceNode - Node for a resource descriptor 587 * BitIndex - Index into the resource descriptor 588 * 589 * RETURN: Full pathname for a resource tag. NULL if no match. 590 * Path is returned in AML (packed) format. 591 * 592 * DESCRIPTION: Convert a BitIndex into a symbolic resource tag (full pathname) 593 * 594 ******************************************************************************/ 595 596static char * 597AcpiGetTagPathname ( 598 ACPI_PARSE_OBJECT *IndexOp, 599 ACPI_NAMESPACE_NODE *BufferNode, 600 ACPI_NAMESPACE_NODE *ResourceNode, 601 UINT32 BitIndex) 602{ 603 ACPI_STATUS Status; 604 UINT32 ResourceBitIndex; 605 UINT8 ResourceTableIndex; 606 ACPI_SIZE RequiredSize; 607 char *Pathname; 608 AML_RESOURCE *Aml; 609 ACPI_PARSE_OBJECT *Op; 610 char *InternalPath; 611 char *Tag; 612 613 614 /* Get the Op that contains the actual buffer data */ 615 616 Op = BufferNode->Op->Common.Value.Arg; 617 Op = Op->Common.Next; 618 if (!Op) 619 { 620 return (NULL); 621 } 622 623 /* Get the individual resource descriptor and validate it */ 624 625 Aml = ACPI_CAST_PTR (AML_RESOURCE, 626 &Op->Named.Data[ResourceNode->Value]); 627 628 Status = AcpiUtValidateResource (NULL, Aml, &ResourceTableIndex); 629 if (ACPI_FAILURE (Status)) 630 { 631 return (NULL); 632 } 633 634 /* Get offset into this descriptor (from offset into entire buffer) */ 635 636 ResourceBitIndex = BitIndex - ACPI_MUL_8 (ResourceNode->Value); 637 638 /* Get the tag associated with this resource descriptor and offset */ 639 640 Tag = AcpiDmGetResourceTag (ResourceBitIndex, Aml, ResourceTableIndex); 641 if (!Tag) 642 { 643 return (NULL); 644 } 645 646 /* 647 * Now that we know that we have a reference that can be converted to a 648 * symbol, change the name of the resource to a unique name. 649 */ 650 AcpiDmUpdateResourceName (ResourceNode); 651 652 /* Get the full pathname to the parent buffer */ 653 654 RequiredSize = AcpiNsGetPathnameLength (BufferNode); 655 if (!RequiredSize) 656 { 657 return (NULL); 658 } 659 660 Pathname = ACPI_ALLOCATE_ZEROED (RequiredSize + ACPI_PATH_SEGMENT_LENGTH); 661 if (!Pathname) 662 { 663 return (NULL); 664 } 665 666 Status = AcpiNsBuildExternalPath (BufferNode, RequiredSize, Pathname); 667 if (ACPI_FAILURE (Status)) 668 { 669 return (NULL); 670 } 671 672 /* 673 * Create the full path to the resource and tag by: remove the buffer name, 674 * append the resource descriptor name, append a dot, append the tag name. 675 * 676 * TBD: Always using the full path is a bit brute force, the path can be 677 * often be optimized with carats (if the original buffer namepath is a 678 * single nameseg). This doesn't really matter, because these paths do not 679 * end up in the final compiled AML, it's just an appearance issue for the 680 * disassembled code. 681 */ 682 Pathname[ACPI_STRLEN (Pathname) - ACPI_NAME_SIZE] = 0; 683 ACPI_STRNCAT (Pathname, ResourceNode->Name.Ascii, ACPI_NAME_SIZE); 684 ACPI_STRCAT (Pathname, "."); 685 ACPI_STRNCAT (Pathname, Tag, ACPI_NAME_SIZE); 686 687 /* Internalize the namepath to AML format */ 688 689 AcpiNsInternalizeName (Pathname, &InternalPath); 690 ACPI_FREE (Pathname); 691 692 /* Update the Op with the symbol */ 693 694 AcpiPsInitOp (IndexOp, AML_INT_NAMEPATH_OP); 695 IndexOp->Common.Value.String = InternalPath; 696 697 /* We will need the tag later. Cheat by putting it in the Node field */ 698 699 IndexOp->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Tag); 700 return (InternalPath); 701} 702 703 704/******************************************************************************* 705 * 706 * FUNCTION: AcpiDmUpdateResourceName 707 * 708 * PARAMETERS: ResourceNode - Node for a resource descriptor 709 * 710 * RETURN: Stores new name in the ResourceNode 711 * 712 * DESCRIPTION: Create a new, unique name for a resource descriptor. Used by 713 * both the disassembly of the descriptor itself and any symbolic 714 * references to the descriptor. Ignored if a unique name has 715 * already been assigned to the resource. 716 * 717 * NOTE: Single threaded, suitable for applications only! 718 * 719 ******************************************************************************/ 720 721static void 722AcpiDmUpdateResourceName ( 723 ACPI_NAMESPACE_NODE *ResourceNode) 724{ 725 char Name[ACPI_NAME_SIZE]; 726 727 728 /* Ignore if a unique name has already been assigned */ 729 730 if (ResourceNode->Name.Integer != ACPI_DEFAULT_RESNAME) 731 { 732 return; 733 } 734 735 /* Generate a new ACPI name for the descriptor */ 736 737 Name[0] = '_'; 738 Name[1] = AcpiGbl_Prefix[AcpiGbl_NextPrefix]; 739 Name[2] = AcpiUtHexToAsciiChar ((UINT64) AcpiGbl_NextResourceId, 4); 740 Name[3] = AcpiUtHexToAsciiChar ((UINT64) AcpiGbl_NextResourceId, 0); 741 742 /* Update globals for next name */ 743 744 AcpiGbl_NextResourceId++; 745 if (AcpiGbl_NextResourceId >= 256) 746 { 747 AcpiGbl_NextResourceId = 0; 748 AcpiGbl_NextPrefix++; 749 if (AcpiGbl_NextPrefix > ACPI_NUM_RES_PREFIX) 750 { 751 AcpiGbl_NextPrefix = 0; 752 } 753 } 754 755 /* Change the resource descriptor name */ 756 757 ResourceNode->Name.Integer = *ACPI_CAST_PTR (UINT32, &Name[0]); 758} 759 760 761/******************************************************************************* 762 * 763 * FUNCTION: AcpiDmGetResourceTag 764 * 765 * PARAMETERS: BitIndex - Index into the resource descriptor 766 * Resource - Pointer to the raw resource data 767 * ResourceIndex - Index correspoinding to the resource type 768 * 769 * RETURN: Pointer to the resource tag (ACPI_NAME). NULL if no match. 770 * 771 * DESCRIPTION: Convert a BitIndex into a symbolic resource tag. 772 * 773 * Note: ResourceIndex should be previously validated and guaranteed to ve 774 * valid. 775 * 776 ******************************************************************************/ 777 778static char * 779AcpiDmGetResourceTag ( 780 UINT32 BitIndex, 781 AML_RESOURCE *Resource, 782 UINT8 ResourceIndex) 783{ 784 const ACPI_RESOURCE_TAG *TagList; 785 char *Tag = NULL; 786 787 788 /* Get the tag list for this resource descriptor type */ 789 790 TagList = AcpiGbl_ResourceTags[ResourceIndex]; 791 792 /* 793 * Handle descriptors that have multiple subtypes 794 */ 795 switch (Resource->DescriptorType) 796 { 797 case ACPI_RESOURCE_NAME_ADDRESS16: 798 case ACPI_RESOURCE_NAME_ADDRESS32: 799 case ACPI_RESOURCE_NAME_ADDRESS64: 800 case ACPI_RESOURCE_NAME_EXTENDED_ADDRESS64: 801 /* 802 * Subtype differentiation is the flags. 803 * Kindof brute force, but just blindly search for an index match 804 */ 805 if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_MEMORY_RANGE) 806 { 807 Tag = AcpiDmSearchTagList (BitIndex, AcpiDmMemoryFlagTags); 808 } 809 else if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_IO_RANGE) 810 { 811 Tag = AcpiDmSearchTagList (BitIndex, AcpiDmIoFlagTags); 812 } 813 814 /* If we found a match, all done. Else, drop to normal search below */ 815 816 if (Tag) 817 { 818 return (Tag); 819 } 820 break; 821 822 case ACPI_RESOURCE_NAME_GPIO: 823 824 /* GPIO connection has 2 subtypes: Interrupt and I/O */ 825 826 if (Resource->Gpio.ConnectionType > AML_RESOURCE_MAX_GPIOTYPE) 827 { 828 return (NULL); 829 } 830 831 TagList = AcpiGbl_GpioResourceTags[Resource->Gpio.ConnectionType]; 832 break; 833 834 case ACPI_RESOURCE_NAME_SERIAL_BUS: 835 836 /* SerialBus has 3 subtypes: I2C, SPI, and UART */ 837 838 if ((Resource->CommonSerialBus.Type == 0) || 839 (Resource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE)) 840 { 841 return (NULL); 842 } 843 844 TagList = AcpiGbl_SerialResourceTags[Resource->CommonSerialBus.Type]; 845 break; 846 847 default: 848 849 break; 850 } 851 852 /* Search for a match against the BitIndex */ 853 854 if (TagList) 855 { 856 Tag = AcpiDmSearchTagList (BitIndex, TagList); 857 } 858 859 return (Tag); 860} 861 862 863/******************************************************************************* 864 * 865 * FUNCTION: AcpiDmSearchTagList 866 * 867 * PARAMETERS: BitIndex - Index into the resource descriptor 868 * TagList - List to search 869 * 870 * RETURN: Pointer to a tag (ACPI_NAME). NULL if no match found. 871 * 872 * DESCRIPTION: Search a tag list for a match to the input BitIndex. Matches 873 * a fixed offset to a symbolic resource tag name. 874 * 875 ******************************************************************************/ 876 877static char * 878AcpiDmSearchTagList ( 879 UINT32 BitIndex, 880 const ACPI_RESOURCE_TAG *TagList) 881{ 882 883 /* 884 * Walk the null-terminated tag list to find a matching bit offset. 885 * We are looking for an exact match. 886 */ 887 for ( ; TagList->Tag; TagList++) 888 { 889 if (BitIndex == TagList->BitIndex) 890 { 891 return (TagList->Tag); 892 } 893 } 894 895 /* A matching offset was not found */ 896 897 return (NULL); 898} 899 900 901/******************************************************************************* 902 * 903 * FUNCTION: AcpiDmFindResources 904 * 905 * PARAMETERS: Root - Root of the parse tree 906 * 907 * RETURN: None 908 * 909 * DESCRIPTION: Add all ResourceTemplate declarations to the namespace. Each 910 * resource descriptor in each template is given a node -- used 911 * for later conversion of resource references to symbolic refs. 912 * 913 ******************************************************************************/ 914 915void 916AcpiDmFindResources ( 917 ACPI_PARSE_OBJECT *Root) 918{ 919 ACPI_PARSE_OBJECT *Op = Root; 920 ACPI_PARSE_OBJECT *Parent; 921 922 923 /* Walk the entire parse tree */ 924 925 while (Op) 926 { 927 /* We are interested in Buffer() declarations */ 928 929 if (Op->Common.AmlOpcode == AML_BUFFER_OP) 930 { 931 /* And only declarations of the form Name (XXXX, Buffer()... ) */ 932 933 Parent = Op->Common.Parent; 934 if (Parent->Common.AmlOpcode == AML_NAME_OP) 935 { 936 /* 937 * If the buffer is a resource template, add the individual 938 * resource descriptors to the namespace, as children of the 939 * buffer node. 940 */ 941 if (ACPI_SUCCESS (AcpiDmIsResourceTemplate (NULL, Op))) 942 { 943 Op->Common.DisasmOpcode = ACPI_DASM_RESOURCE; 944 AcpiDmAddResourcesToNamespace (Parent->Common.Node, Op); 945 } 946 } 947 } 948 949 Op = AcpiPsGetDepthNext (Root, Op); 950 } 951} 952 953 954/******************************************************************************* 955 * 956 * FUNCTION: AcpiDmAddResourcesToNamespace 957 * 958 * PARAMETERS: BufferNode - Node for the parent buffer 959 * Op - Parse op for the buffer 960 * 961 * RETURN: None 962 * 963 * DESCRIPTION: Add an entire resource template to the namespace. Each 964 * resource descriptor is added as a namespace node. 965 * 966 ******************************************************************************/ 967 968static void 969AcpiDmAddResourcesToNamespace ( 970 ACPI_NAMESPACE_NODE *BufferNode, 971 ACPI_PARSE_OBJECT *Op) 972{ 973 ACPI_PARSE_OBJECT *NextOp; 974 975 976 /* Get to the ByteData list */ 977 978 NextOp = Op->Common.Value.Arg; 979 NextOp = NextOp->Common.Next; 980 if (!NextOp) 981 { 982 return; 983 } 984 985 /* Set Node and Op to point to each other */ 986 987 BufferNode->Op = Op; 988 Op->Common.Node = BufferNode; 989 990 /* 991 * Insert each resource into the namespace 992 * NextOp contains the Aml pointer and the Aml length 993 */ 994 AcpiUtWalkAmlResources (NULL, (UINT8 *) NextOp->Named.Data, 995 (ACPI_SIZE) NextOp->Common.Value.Integer, 996 AcpiDmAddResourceToNamespace, (void **) BufferNode); 997} 998 999 1000/******************************************************************************* 1001 * 1002 * FUNCTION: AcpiDmAddResourceToNamespace 1003 * 1004 * PARAMETERS: ACPI_WALK_AML_CALLBACK 1005 * BufferNode - Node for the parent buffer 1006 * 1007 * RETURN: Status 1008 * 1009 * DESCRIPTION: Add one resource descriptor to the namespace as a child of the 1010 * parent buffer. The same name is used for each descriptor. This 1011 * is changed later to a unique name if the resource is actually 1012 * referenced by an AML operator. 1013 * 1014 ******************************************************************************/ 1015 1016static ACPI_STATUS 1017AcpiDmAddResourceToNamespace ( 1018 UINT8 *Aml, 1019 UINT32 Length, 1020 UINT32 Offset, 1021 UINT8 ResourceIndex, 1022 void **Context) 1023{ 1024 ACPI_STATUS Status; 1025 ACPI_GENERIC_STATE ScopeInfo; 1026 ACPI_NAMESPACE_NODE *Node; 1027 1028 1029 /* TBD: Don't need to add descriptors that have no tags defined? */ 1030 1031 /* Add the resource to the namespace, as child of the buffer */ 1032 1033 ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Context); 1034 Status = AcpiNsLookup (&ScopeInfo, "_TMP", ACPI_TYPE_LOCAL_RESOURCE, 1035 ACPI_IMODE_LOAD_PASS2, 1036 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_PREFIX_IS_SCOPE, 1037 NULL, &Node); 1038 if (ACPI_FAILURE (Status)) 1039 { 1040 return (AE_OK); 1041 } 1042 1043 /* Set the name to the default, changed later if resource is referenced */ 1044 1045 Node->Name.Integer = ACPI_DEFAULT_RESNAME; 1046 1047 /* Save the offset of the descriptor (within the original buffer) */ 1048 1049 Node->Value = Offset; 1050 Node->Length = Length; 1051 return (AE_OK); 1052} 1053