1 /****************************************************************************** 2 * 3 * Module Name: dmrestag - Add tags to resource descriptors (Application-level) 4 * 5 *****************************************************************************/ 6 7 /* 8 * Copyright (C) 2000 - 2016, 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 #include "acpi.h" 45 #include "accommon.h" 46 #include "acparser.h" 47 #include "acdisasm.h" 48 #include "acnamesp.h" 49 #include "amlcode.h" 50 51 /* This module used for application-level code only */ 52 53 #define _COMPONENT ACPI_CA_DISASSEMBLER 54 ACPI_MODULE_NAME ("dmrestag") 55 56 /* Local prototypes */ 57 58 static void 59 AcpiDmUpdateResourceName ( 60 ACPI_NAMESPACE_NODE *ResourceNode); 61 62 static char * 63 AcpiDmSearchTagList ( 64 UINT32 BitIndex, 65 const ACPI_RESOURCE_TAG *TagList); 66 67 static char * 68 AcpiDmGetResourceTag ( 69 UINT32 BitIndex, 70 AML_RESOURCE *Resource, 71 UINT8 ResourceIndex); 72 73 static char * 74 AcpiGetTagPathname ( 75 ACPI_PARSE_OBJECT *Op, 76 ACPI_NAMESPACE_NODE *BufferNode, 77 ACPI_NAMESPACE_NODE *ResourceNode, 78 UINT32 BitIndex); 79 80 static ACPI_NAMESPACE_NODE * 81 AcpiDmGetResourceNode ( 82 ACPI_NAMESPACE_NODE *BufferNode, 83 UINT32 BitIndex); 84 85 static ACPI_STATUS 86 AcpiDmAddResourceToNamespace ( 87 UINT8 *Aml, 88 UINT32 Length, 89 UINT32 Offset, 90 UINT8 ResourceIndex, 91 void **Context); 92 93 static void 94 AcpiDmAddResourcesToNamespace ( 95 ACPI_NAMESPACE_NODE *BufferNode, 96 ACPI_PARSE_OBJECT *Op); 97 98 99 /****************************************************************************** 100 * 101 * Resource Tag tables 102 * 103 * These are the predefined tags that refer to elements of a resource 104 * descriptor. Each name and offset is defined in the ACPI specification. 105 * 106 * Each table entry contains the bit offset of the field and the associated 107 * name. 108 * 109 ******************************************************************************/ 110 111 static const ACPI_RESOURCE_TAG AcpiDmIrqTags[] = 112 { 113 {( 1 * 8), ACPI_RESTAG_INTERRUPT}, 114 {( 3 * 8) + 0, ACPI_RESTAG_INTERRUPTTYPE}, 115 {( 3 * 8) + 3, ACPI_RESTAG_INTERRUPTLEVEL}, 116 {( 3 * 8) + 4, ACPI_RESTAG_INTERRUPTSHARE}, 117 {0, NULL} 118 }; 119 120 static const ACPI_RESOURCE_TAG AcpiDmDmaTags[] = 121 { 122 {( 1 * 8), ACPI_RESTAG_DMA}, 123 {( 2 * 8) + 0, ACPI_RESTAG_XFERTYPE}, 124 {( 2 * 8) + 2, ACPI_RESTAG_BUSMASTER}, 125 {( 2 * 8) + 5, ACPI_RESTAG_DMATYPE}, 126 {0, NULL} 127 }; 128 129 static const ACPI_RESOURCE_TAG AcpiDmIoTags[] = 130 { 131 {( 1 * 8) + 0, ACPI_RESTAG_DECODE}, 132 {( 2 * 8), ACPI_RESTAG_MINADDR}, 133 {( 4 * 8), ACPI_RESTAG_MAXADDR}, 134 {( 6 * 8), ACPI_RESTAG_ALIGNMENT}, 135 {( 7 * 8), ACPI_RESTAG_LENGTH}, 136 {0, NULL} 137 }; 138 139 static const ACPI_RESOURCE_TAG AcpiDmFixedIoTags[] = 140 { 141 {( 1 * 8), ACPI_RESTAG_BASEADDRESS}, 142 {( 3 * 8), ACPI_RESTAG_LENGTH}, 143 {0, NULL} 144 }; 145 146 static const ACPI_RESOURCE_TAG AcpiDmFixedDmaTags[] = 147 { 148 {( 1 * 8), ACPI_RESTAG_DMA}, 149 {( 3 * 8), ACPI_RESTAG_DMATYPE}, 150 {( 5 * 8), ACPI_RESTAG_XFERTYPE}, 151 {0, NULL} 152 }; 153 154 static const ACPI_RESOURCE_TAG AcpiDmMemory24Tags[] = 155 { 156 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 157 {( 4 * 8), ACPI_RESTAG_MINADDR}, 158 {( 6 * 8), ACPI_RESTAG_MAXADDR}, 159 {( 8 * 8), ACPI_RESTAG_ALIGNMENT}, 160 {(10 * 8), ACPI_RESTAG_LENGTH}, 161 {0, NULL} 162 }; 163 164 static const ACPI_RESOURCE_TAG AcpiDmRegisterTags[] = 165 { 166 {( 3 * 8), ACPI_RESTAG_ADDRESSSPACE}, 167 {( 4 * 8), ACPI_RESTAG_REGISTERBITWIDTH}, 168 {( 5 * 8), ACPI_RESTAG_REGISTERBITOFFSET}, 169 {( 6 * 8), ACPI_RESTAG_ACCESSSIZE}, 170 {( 7 * 8), ACPI_RESTAG_ADDRESS}, 171 {0, NULL} 172 }; 173 174 static const ACPI_RESOURCE_TAG AcpiDmMemory32Tags[] = 175 { 176 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 177 {( 4 * 8), ACPI_RESTAG_MINADDR}, 178 {( 8 * 8), ACPI_RESTAG_MAXADDR}, 179 {(12 * 8), ACPI_RESTAG_ALIGNMENT}, 180 {(16 * 8), ACPI_RESTAG_LENGTH}, 181 {0, NULL} 182 }; 183 184 static const ACPI_RESOURCE_TAG AcpiDmFixedMemory32Tags[] = 185 { 186 {( 3 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 187 {( 4 * 8), ACPI_RESTAG_BASEADDRESS}, 188 {( 8 * 8), ACPI_RESTAG_LENGTH}, 189 {0, NULL} 190 }; 191 192 static const ACPI_RESOURCE_TAG AcpiDmInterruptTags[] = 193 { 194 {( 3 * 8) + 1, ACPI_RESTAG_INTERRUPTTYPE}, 195 {( 3 * 8) + 2, ACPI_RESTAG_INTERRUPTLEVEL}, 196 {( 3 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 197 {( 5 * 8), ACPI_RESTAG_INTERRUPT}, 198 {0, NULL} 199 }; 200 201 static const ACPI_RESOURCE_TAG AcpiDmAddress16Tags[] = 202 { 203 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 204 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 205 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 206 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 207 {( 8 * 8), ACPI_RESTAG_MINADDR}, 208 {(10 * 8), ACPI_RESTAG_MAXADDR}, 209 {(12 * 8), ACPI_RESTAG_TRANSLATION}, 210 {(14 * 8), ACPI_RESTAG_LENGTH}, 211 {0, NULL} 212 }; 213 214 static const ACPI_RESOURCE_TAG AcpiDmAddress32Tags[] = 215 { 216 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 217 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 218 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 219 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 220 {(10 * 8), ACPI_RESTAG_MINADDR}, 221 {(14 * 8), ACPI_RESTAG_MAXADDR}, 222 {(18 * 8), ACPI_RESTAG_TRANSLATION}, 223 {(22 * 8), ACPI_RESTAG_LENGTH}, 224 {0, NULL} 225 }; 226 227 static const ACPI_RESOURCE_TAG AcpiDmAddress64Tags[] = 228 { 229 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 230 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 231 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 232 {( 6 * 8), ACPI_RESTAG_GRANULARITY}, 233 {(14 * 8), ACPI_RESTAG_MINADDR}, 234 {(22 * 8), ACPI_RESTAG_MAXADDR}, 235 {(30 * 8), ACPI_RESTAG_TRANSLATION}, 236 {(38 * 8), ACPI_RESTAG_LENGTH}, 237 {0, NULL} 238 }; 239 240 static const ACPI_RESOURCE_TAG AcpiDmExtendedAddressTags[] = 241 { 242 {( 4 * 8) + 1, ACPI_RESTAG_DECODE}, 243 {( 4 * 8) + 2, ACPI_RESTAG_MINTYPE}, 244 {( 4 * 8) + 3, ACPI_RESTAG_MAXTYPE}, 245 {( 8 * 8), ACPI_RESTAG_GRANULARITY}, 246 {(16 * 8), ACPI_RESTAG_MINADDR}, 247 {(24 * 8), ACPI_RESTAG_MAXADDR}, 248 {(32 * 8), ACPI_RESTAG_TRANSLATION}, 249 {(40 * 8), ACPI_RESTAG_LENGTH}, 250 {(48 * 8), ACPI_RESTAG_TYPESPECIFICATTRIBUTES}, 251 {0, NULL} 252 }; 253 254 /* Subtype tables for GPIO descriptors */ 255 256 static const ACPI_RESOURCE_TAG AcpiDmGpioIntTags[] = 257 { 258 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 259 {( 7 * 8) + 1, ACPI_RESTAG_POLARITY}, 260 {( 7 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 261 {( 9 * 8), ACPI_RESTAG_PINCONFIG}, 262 {(10 * 8), ACPI_RESTAG_DRIVESTRENGTH}, 263 {(12 * 8), ACPI_RESTAG_DEBOUNCETIME}, 264 {0, NULL} 265 }; 266 267 static const ACPI_RESOURCE_TAG AcpiDmGpioIoTags[] = 268 { 269 {( 7 * 8) + 0, ACPI_RESTAG_IORESTRICTION}, 270 {( 7 * 8) + 3, ACPI_RESTAG_INTERRUPTSHARE}, 271 {( 9 * 8), ACPI_RESTAG_PINCONFIG}, 272 {(10 * 8), ACPI_RESTAG_DRIVESTRENGTH}, 273 {(12 * 8), ACPI_RESTAG_DEBOUNCETIME}, 274 {0, NULL} 275 }; 276 277 /* Subtype tables for SerialBus descriptors */ 278 279 static const ACPI_RESOURCE_TAG AcpiDmI2cSerialBusTags[] = 280 { 281 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, 282 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 283 {(12 * 8), ACPI_RESTAG_SPEED}, 284 {(16 * 8), ACPI_RESTAG_ADDRESS}, 285 {0, NULL} 286 }; 287 288 static const ACPI_RESOURCE_TAG AcpiDmSpiSerialBusTags[] = 289 { 290 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, 291 {( 7 * 8) + 0, ACPI_RESTAG_MODE}, 292 {( 7 * 8) + 1, ACPI_RESTAG_DEVICEPOLARITY}, 293 {(12 * 8), ACPI_RESTAG_SPEED}, 294 {(16 * 8), ACPI_RESTAG_LENGTH}, 295 {(17 * 8), ACPI_RESTAG_PHASE}, 296 {(18 * 8), ACPI_RESTAG_POLARITY}, 297 {(19 * 8), ACPI_RESTAG_ADDRESS}, 298 {0, NULL} 299 }; 300 301 static const ACPI_RESOURCE_TAG AcpiDmUartSerialBusTags[] = 302 { 303 {( 6 * 8) + 0, ACPI_RESTAG_SLAVEMODE}, /* Note: not part of original macro */ 304 {( 7 * 8) + 0, ACPI_RESTAG_FLOWCONTROL}, 305 {( 7 * 8) + 2, ACPI_RESTAG_STOPBITS}, 306 {( 7 * 8) + 4, ACPI_RESTAG_LENGTH}, 307 {( 7 * 8) + 7, ACPI_RESTAG_ENDIANNESS}, 308 {(12 * 8), ACPI_RESTAG_SPEED}, 309 {(16 * 8), ACPI_RESTAG_LENGTH_RX}, 310 {(18 * 8), ACPI_RESTAG_LENGTH_TX}, 311 {(20 * 8), ACPI_RESTAG_PARITY}, 312 {(21 * 8), ACPI_RESTAG_LINE}, 313 {0, NULL} 314 }; 315 316 /* Subtype tables for Address descriptor type-specific flags */ 317 318 static const ACPI_RESOURCE_TAG AcpiDmMemoryFlagTags[] = 319 { 320 {( 5 * 8) + 0, ACPI_RESTAG_READWRITETYPE}, 321 {( 5 * 8) + 1, ACPI_RESTAG_MEMTYPE}, 322 {( 5 * 8) + 3, ACPI_RESTAG_MEMATTRIBUTES}, 323 {( 5 * 8) + 5, ACPI_RESTAG_TYPE}, 324 {0, NULL} 325 }; 326 327 static const ACPI_RESOURCE_TAG AcpiDmIoFlagTags[] = 328 { 329 {( 5 * 8) + 0, ACPI_RESTAG_RANGETYPE}, 330 {( 5 * 8) + 4, ACPI_RESTAG_TYPE}, 331 {( 5 * 8) + 5, ACPI_RESTAG_TRANSTYPE}, 332 {0, NULL} 333 }; 334 335 336 /* 337 * Dispatch table used to obtain the correct tag table for a descriptor. 338 * 339 * A NULL in this table means one of three things: 340 * 1) The descriptor ID is reserved and invalid 341 * 2) The descriptor has no tags associated with it 342 * 3) The descriptor has subtypes and a separate table will be used. 343 */ 344 static const ACPI_RESOURCE_TAG *AcpiGbl_ResourceTags[] = 345 { 346 /* Small descriptors */ 347 348 NULL, /* 0x00, Reserved */ 349 NULL, /* 0x01, Reserved */ 350 NULL, /* 0x02, Reserved */ 351 NULL, /* 0x03, Reserved */ 352 AcpiDmIrqTags, /* 0x04, ACPI_RESOURCE_NAME_IRQ_FORMAT */ 353 AcpiDmDmaTags, /* 0x05, ACPI_RESOURCE_NAME_DMA_FORMAT */ 354 NULL, /* 0x06, ACPI_RESOURCE_NAME_START_DEPENDENT */ 355 NULL, /* 0x07, ACPI_RESOURCE_NAME_END_DEPENDENT */ 356 AcpiDmIoTags, /* 0x08, ACPI_RESOURCE_NAME_IO_PORT */ 357 AcpiDmFixedIoTags, /* 0x09, ACPI_RESOURCE_NAME_FIXED_IO_PORT */ 358 AcpiDmFixedDmaTags, /* 0x0A, ACPI_RESOURCE_NAME_FIXED_DMA */ 359 NULL, /* 0x0B, Reserved */ 360 NULL, /* 0x0C, Reserved */ 361 NULL, /* 0x0D, Reserved */ 362 NULL, /* 0x0E, ACPI_RESOURCE_NAME_SMALL_VENDOR */ 363 NULL, /* 0x0F, ACPI_RESOURCE_NAME_END_TAG (not used) */ 364 365 /* Large descriptors */ 366 367 NULL, /* 0x00, Reserved */ 368 AcpiDmMemory24Tags, /* 0x01, ACPI_RESOURCE_NAME_MEMORY_24 */ 369 AcpiDmRegisterTags, /* 0x02, ACPI_RESOURCE_NAME_GENERIC_REGISTER */ 370 NULL, /* 0x03, Reserved */ 371 NULL, /* 0x04, ACPI_RESOURCE_NAME_LARGE_VENDOR */ 372 AcpiDmMemory32Tags, /* 0x05, ACPI_RESOURCE_NAME_MEMORY_32 */ 373 AcpiDmFixedMemory32Tags, /* 0x06, ACPI_RESOURCE_NAME_FIXED_MEMORY_32 */ 374 AcpiDmAddress32Tags, /* 0x07, ACPI_RESOURCE_NAME_DWORD_ADDRESS_SPACE */ 375 AcpiDmAddress16Tags, /* 0x08, ACPI_RESOURCE_NAME_WORD_ADDRESS_SPACE */ 376 AcpiDmInterruptTags, /* 0x09, ACPI_RESOURCE_NAME_EXTENDED_XRUPT */ 377 AcpiDmAddress64Tags, /* 0x0A, ACPI_RESOURCE_NAME_QWORD_ADDRESS_SPACE */ 378 AcpiDmExtendedAddressTags, /* 0x0B, ACPI_RESOURCE_NAME_EXTENDED_ADDRESS_SPACE */ 379 NULL, /* 0x0C, ACPI_RESOURCE_NAME_GPIO - Use Subtype table below */ 380 NULL, /* 0x0D, Reserved */ 381 NULL /* 0x0E, ACPI_RESOURCE_NAME_SERIAL_BUS - Use Subtype table below */ 382 }; 383 384 /* GPIO Subtypes */ 385 386 static const ACPI_RESOURCE_TAG *AcpiGbl_GpioResourceTags[] = 387 { 388 AcpiDmGpioIntTags, /* 0x00 Interrupt Connection */ 389 AcpiDmGpioIoTags /* 0x01 I/O Connection */ 390 }; 391 392 /* Serial Bus Subtypes */ 393 394 static const ACPI_RESOURCE_TAG *AcpiGbl_SerialResourceTags[] = 395 { 396 NULL, /* 0x00 Reserved */ 397 AcpiDmI2cSerialBusTags, /* 0x01 I2C SerialBus */ 398 AcpiDmSpiSerialBusTags, /* 0x02 SPI SerialBus */ 399 AcpiDmUartSerialBusTags /* 0x03 UART SerialBus */ 400 }; 401 402 /* 403 * Globals used to generate unique resource descriptor names. We use names that 404 * start with underscore and a prefix letter that is not used by other ACPI 405 * reserved names. To this, we append hex 0x00 through 0xFF. These 5 prefixes 406 * allow for 5*256 = 1280 unique names, probably sufficient for any single ASL 407 * file. If this becomes too small, we can use alpha+numerals for a total 408 * of 5*36*36 = 6480. 409 */ 410 #define ACPI_NUM_RES_PREFIX 5 411 412 static UINT32 AcpiGbl_NextResourceId = 0; 413 static UINT8 AcpiGbl_NextPrefix = 0; 414 static char AcpiGbl_Prefix[ACPI_NUM_RES_PREFIX] = 415 {'Y','Z','J','K','X'}; 416 417 418 /******************************************************************************* 419 * 420 * FUNCTION: AcpiDmCheckResourceReference 421 * 422 * PARAMETERS: Op - Parse Op for the AML opcode 423 * WalkState - Current walk state (with valid scope) 424 * 425 * RETURN: None 426 * 427 * DESCRIPTION: Convert a reference to a resource descriptor to a symbolic 428 * reference if possible 429 * 430 * NOTE: Bit index is used to transparently handle both resource bit 431 * fields and byte fields. 432 * 433 ******************************************************************************/ 434 435 void 436 AcpiDmCheckResourceReference ( 437 ACPI_PARSE_OBJECT *Op, 438 ACPI_WALK_STATE *WalkState) 439 { 440 ACPI_STATUS Status; 441 ACPI_PARSE_OBJECT *BufferNameOp; 442 ACPI_PARSE_OBJECT *IndexOp; 443 ACPI_NAMESPACE_NODE *BufferNode; 444 ACPI_NAMESPACE_NODE *ResourceNode; 445 const ACPI_OPCODE_INFO *OpInfo; 446 UINT32 BitIndex; 447 448 449 /* We are only interested in the CreateXxxxField opcodes */ 450 451 OpInfo = AcpiPsGetOpcodeInfo (Op->Common.AmlOpcode); 452 if (OpInfo->Type != AML_TYPE_CREATE_FIELD) 453 { 454 return; 455 } 456 457 /* Get the buffer term operand */ 458 459 BufferNameOp = AcpiPsGetDepthNext (NULL, Op); 460 461 /* Must be a named buffer, not an arg or local or method call */ 462 463 if (BufferNameOp->Common.AmlOpcode != AML_INT_NAMEPATH_OP) 464 { 465 return; 466 } 467 468 /* Get the Index term, must be an integer constant to convert */ 469 470 IndexOp = BufferNameOp->Common.Next; 471 472 /* Major cheat: The Node field is also used for the Tag ptr. Clear it now */ 473 474 IndexOp->Common.Node = NULL; 475 476 OpInfo = AcpiPsGetOpcodeInfo (IndexOp->Common.AmlOpcode); 477 if (OpInfo->ObjectType != ACPI_TYPE_INTEGER) 478 { 479 return; 480 } 481 482 /* Get the bit offset of the descriptor within the buffer */ 483 484 if ((Op->Common.AmlOpcode == AML_CREATE_BIT_FIELD_OP) || 485 (Op->Common.AmlOpcode == AML_CREATE_FIELD_OP)) 486 { 487 /* Index operand is a bit offset */ 488 489 BitIndex = (UINT32) IndexOp->Common.Value.Integer; 490 } 491 else 492 { 493 /* Index operand is a byte offset, convert to bits */ 494 495 BitIndex = (UINT32) ACPI_MUL_8 (IndexOp->Common.Value.Integer); 496 } 497 498 /* Lookup the buffer in the namespace */ 499 500 Status = AcpiNsLookup (WalkState->ScopeInfo, 501 BufferNameOp->Common.Value.String, ACPI_TYPE_BUFFER, 502 ACPI_IMODE_EXECUTE, ACPI_NS_SEARCH_PARENT, WalkState, 503 &BufferNode); 504 if (ACPI_FAILURE (Status)) 505 { 506 return; 507 } 508 509 /* Validate object type, we must have a buffer */ 510 511 if (BufferNode->Type != ACPI_TYPE_BUFFER) 512 { 513 return; 514 } 515 516 /* Find the resource descriptor node corresponding to the index */ 517 518 ResourceNode = AcpiDmGetResourceNode (BufferNode, BitIndex); 519 if (!ResourceNode) 520 { 521 return; 522 } 523 524 /* Translate the Index to a resource tag pathname */ 525 526 AcpiGetTagPathname (IndexOp, BufferNode, ResourceNode, BitIndex); 527 } 528 529 530 /******************************************************************************* 531 * 532 * FUNCTION: AcpiDmGetResourceNode 533 * 534 * PARAMETERS: BufferNode - Node for the parent buffer 535 * BitIndex - Index into the resource descriptor 536 * 537 * RETURN: Namespace node for the resource descriptor. NULL if not found 538 * 539 * DESCRIPTION: Find a resource descriptor that corresponds to the bit index 540 * 541 ******************************************************************************/ 542 543 static ACPI_NAMESPACE_NODE * 544 AcpiDmGetResourceNode ( 545 ACPI_NAMESPACE_NODE *BufferNode, 546 UINT32 BitIndex) 547 { 548 ACPI_NAMESPACE_NODE *Node; 549 UINT32 ByteIndex = ACPI_DIV_8 (BitIndex); 550 551 552 /* 553 * Child list contains an entry for each resource descriptor. Find 554 * the descriptor that corresponds to the Index. 555 * 556 * If there are no children, this is not a resource template 557 */ 558 Node = BufferNode->Child; 559 while (Node) 560 { 561 /* 562 * Check if the Index falls within this resource. 563 * 564 * Value contains the resource offset, Object contains the resource 565 * length (both in bytes) 566 */ 567 if ((ByteIndex >= Node->Value) && 568 (ByteIndex < (Node->Value + Node->Length))) 569 { 570 return (Node); 571 } 572 573 Node = Node->Peer; 574 } 575 576 return (NULL); 577 } 578 579 580 /******************************************************************************* 581 * 582 * FUNCTION: AcpiGetTagPathname 583 * 584 * PARAMETERS: BufferNode - Node for the parent buffer 585 * ResourceNode - Node for a resource descriptor 586 * BitIndex - Index into the resource descriptor 587 * 588 * RETURN: Full pathname for a resource tag. NULL if no match. 589 * Path is returned in AML (packed) format. 590 * 591 * DESCRIPTION: Convert a BitIndex into a symbolic resource tag (full pathname) 592 * 593 ******************************************************************************/ 594 595 static char * 596 AcpiGetTagPathname ( 597 ACPI_PARSE_OBJECT *IndexOp, 598 ACPI_NAMESPACE_NODE *BufferNode, 599 ACPI_NAMESPACE_NODE *ResourceNode, 600 UINT32 BitIndex) 601 { 602 ACPI_STATUS Status; 603 UINT32 ResourceBitIndex; 604 UINT8 ResourceTableIndex; 605 ACPI_SIZE RequiredSize; 606 char *Pathname; 607 AML_RESOURCE *Aml; 608 ACPI_PARSE_OBJECT *Op; 609 char *InternalPath; 610 char *Tag; 611 612 613 /* Get the Op that contains the actual buffer data */ 614 615 Op = BufferNode->Op->Common.Value.Arg; 616 Op = Op->Common.Next; 617 if (!Op) 618 { 619 return (NULL); 620 } 621 622 /* Get the individual resource descriptor and validate it */ 623 624 Aml = ACPI_CAST_PTR ( 625 AML_RESOURCE, &Op->Named.Data[ResourceNode->Value]); 626 627 Status = AcpiUtValidateResource (NULL, Aml, &ResourceTableIndex); 628 if (ACPI_FAILURE (Status)) 629 { 630 return (NULL); 631 } 632 633 /* Get offset into this descriptor (from offset into entire buffer) */ 634 635 ResourceBitIndex = BitIndex - ACPI_MUL_8 (ResourceNode->Value); 636 637 /* Get the tag associated with this resource descriptor and offset */ 638 639 Tag = AcpiDmGetResourceTag (ResourceBitIndex, Aml, ResourceTableIndex); 640 if (!Tag) 641 { 642 return (NULL); 643 } 644 645 /* 646 * Now that we know that we have a reference that can be converted to a 647 * symbol, change the name of the resource to a unique name. 648 */ 649 AcpiDmUpdateResourceName (ResourceNode); 650 651 /* Get the full pathname to the parent buffer */ 652 653 RequiredSize = AcpiNsBuildNormalizedPath (BufferNode, NULL, 0, FALSE); 654 if (!RequiredSize) 655 { 656 return (NULL); 657 } 658 659 Pathname = ACPI_ALLOCATE_ZEROED (RequiredSize + ACPI_PATH_SEGMENT_LENGTH); 660 if (!Pathname) 661 { 662 return (NULL); 663 } 664 665 (void) AcpiNsBuildNormalizedPath (BufferNode, Pathname, 666 RequiredSize, FALSE); 667 668 /* 669 * Create the full path to the resource and tag by: remove the buffer name, 670 * append the resource descriptor name, append a dot, append the tag name. 671 * 672 * TBD: Always using the full path is a bit brute force, the path can be 673 * often be optimized with carats (if the original buffer namepath is a 674 * single nameseg). This doesn't really matter, because these paths do not 675 * end up in the final compiled AML, it's just an appearance issue for the 676 * disassembled code. 677 */ 678 Pathname[strlen (Pathname) - ACPI_NAME_SIZE] = 0; 679 strncat (Pathname, ResourceNode->Name.Ascii, ACPI_NAME_SIZE); 680 strcat (Pathname, "."); 681 strncat (Pathname, Tag, ACPI_NAME_SIZE); 682 683 /* Internalize the namepath to AML format */ 684 685 AcpiNsInternalizeName (Pathname, &InternalPath); 686 ACPI_FREE (Pathname); 687 688 /* Update the Op with the symbol */ 689 690 AcpiPsInitOp (IndexOp, AML_INT_NAMEPATH_OP); 691 IndexOp->Common.Value.String = InternalPath; 692 693 /* We will need the tag later. Cheat by putting it in the Node field */ 694 695 IndexOp->Common.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Tag); 696 return (InternalPath); 697 } 698 699 700 /******************************************************************************* 701 * 702 * FUNCTION: AcpiDmUpdateResourceName 703 * 704 * PARAMETERS: ResourceNode - Node for a resource descriptor 705 * 706 * RETURN: Stores new name in the ResourceNode 707 * 708 * DESCRIPTION: Create a new, unique name for a resource descriptor. Used by 709 * both the disassembly of the descriptor itself and any symbolic 710 * references to the descriptor. Ignored if a unique name has 711 * already been assigned to the resource. 712 * 713 * NOTE: Single threaded, suitable for applications only! 714 * 715 ******************************************************************************/ 716 717 static void 718 AcpiDmUpdateResourceName ( 719 ACPI_NAMESPACE_NODE *ResourceNode) 720 { 721 char Name[ACPI_NAME_SIZE]; 722 723 724 /* Ignore if a unique name has already been assigned */ 725 726 if (ResourceNode->Name.Integer != ACPI_DEFAULT_RESNAME) 727 { 728 return; 729 } 730 731 /* Generate a new ACPI name for the descriptor */ 732 733 Name[0] = '_'; 734 Name[1] = AcpiGbl_Prefix[AcpiGbl_NextPrefix]; 735 Name[2] = AcpiUtHexToAsciiChar ((UINT64) AcpiGbl_NextResourceId, 4); 736 Name[3] = AcpiUtHexToAsciiChar ((UINT64) AcpiGbl_NextResourceId, 0); 737 738 /* Update globals for next name */ 739 740 AcpiGbl_NextResourceId++; 741 if (AcpiGbl_NextResourceId >= 256) 742 { 743 AcpiGbl_NextResourceId = 0; 744 AcpiGbl_NextPrefix++; 745 746 if (AcpiGbl_NextPrefix > ACPI_NUM_RES_PREFIX) 747 { 748 AcpiGbl_NextPrefix = 0; 749 } 750 } 751 752 /* Change the resource descriptor name */ 753 754 ResourceNode->Name.Integer = *ACPI_CAST_PTR (UINT32, &Name[0]); 755 } 756 757 758 /******************************************************************************* 759 * 760 * FUNCTION: AcpiDmGetResourceTag 761 * 762 * PARAMETERS: BitIndex - Index into the resource descriptor 763 * Resource - Pointer to the raw resource data 764 * ResourceIndex - Index correspoinding to the resource type 765 * 766 * RETURN: Pointer to the resource tag (ACPI_NAME). NULL if no match. 767 * 768 * DESCRIPTION: Convert a BitIndex into a symbolic resource tag. 769 * 770 * Note: ResourceIndex should be previously validated and guaranteed to ve 771 * valid. 772 * 773 ******************************************************************************/ 774 775 static char * 776 AcpiDmGetResourceTag ( 777 UINT32 BitIndex, 778 AML_RESOURCE *Resource, 779 UINT8 ResourceIndex) 780 { 781 const ACPI_RESOURCE_TAG *TagList; 782 char *Tag = NULL; 783 784 785 /* Get the tag list for this resource descriptor type */ 786 787 TagList = AcpiGbl_ResourceTags[ResourceIndex]; 788 789 /* 790 * Handle descriptors that have multiple subtypes 791 */ 792 switch (Resource->DescriptorType) 793 { 794 case ACPI_RESOURCE_NAME_ADDRESS16: 795 case ACPI_RESOURCE_NAME_ADDRESS32: 796 case ACPI_RESOURCE_NAME_ADDRESS64: 797 case ACPI_RESOURCE_NAME_EXTENDED_ADDRESS64: 798 /* 799 * Subtype differentiation is the flags. 800 * Kindof brute force, but just blindly search for an index match 801 */ 802 if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_MEMORY_RANGE) 803 { 804 Tag = AcpiDmSearchTagList (BitIndex, AcpiDmMemoryFlagTags); 805 } 806 else if (Resource->Address.ResourceType == ACPI_ADDRESS_TYPE_IO_RANGE) 807 { 808 Tag = AcpiDmSearchTagList (BitIndex, AcpiDmIoFlagTags); 809 } 810 811 /* If we found a match, all done. Else, drop to normal search below */ 812 813 if (Tag) 814 { 815 return (Tag); 816 } 817 break; 818 819 case ACPI_RESOURCE_NAME_GPIO: 820 821 /* GPIO connection has 2 subtypes: Interrupt and I/O */ 822 823 if (Resource->Gpio.ConnectionType > AML_RESOURCE_MAX_GPIOTYPE) 824 { 825 return (NULL); 826 } 827 828 TagList = AcpiGbl_GpioResourceTags[Resource->Gpio.ConnectionType]; 829 break; 830 831 case ACPI_RESOURCE_NAME_SERIAL_BUS: 832 833 /* SerialBus has 3 subtypes: I2C, SPI, and UART */ 834 835 if ((Resource->CommonSerialBus.Type == 0) || 836 (Resource->CommonSerialBus.Type > AML_RESOURCE_MAX_SERIALBUSTYPE)) 837 { 838 return (NULL); 839 } 840 841 TagList = AcpiGbl_SerialResourceTags[Resource->CommonSerialBus.Type]; 842 break; 843 844 default: 845 846 break; 847 } 848 849 /* Search for a match against the BitIndex */ 850 851 if (TagList) 852 { 853 Tag = AcpiDmSearchTagList (BitIndex, TagList); 854 } 855 856 return (Tag); 857 } 858 859 860 /******************************************************************************* 861 * 862 * FUNCTION: AcpiDmSearchTagList 863 * 864 * PARAMETERS: BitIndex - Index into the resource descriptor 865 * TagList - List to search 866 * 867 * RETURN: Pointer to a tag (ACPI_NAME). NULL if no match found. 868 * 869 * DESCRIPTION: Search a tag list for a match to the input BitIndex. Matches 870 * a fixed offset to a symbolic resource tag name. 871 * 872 ******************************************************************************/ 873 874 static char * 875 AcpiDmSearchTagList ( 876 UINT32 BitIndex, 877 const ACPI_RESOURCE_TAG *TagList) 878 { 879 880 /* 881 * Walk the null-terminated tag list to find a matching bit offset. 882 * We are looking for an exact match. 883 */ 884 for ( ; TagList->Tag; TagList++) 885 { 886 if (BitIndex == TagList->BitIndex) 887 { 888 return (TagList->Tag); 889 } 890 } 891 892 /* A matching offset was not found */ 893 894 return (NULL); 895 } 896 897 898 /******************************************************************************* 899 * 900 * FUNCTION: AcpiDmFindResources 901 * 902 * PARAMETERS: Root - Root of the parse tree 903 * 904 * RETURN: None 905 * 906 * DESCRIPTION: Add all ResourceTemplate declarations to the namespace. Each 907 * resource descriptor in each template is given a node -- used 908 * for later conversion of resource references to symbolic refs. 909 * 910 ******************************************************************************/ 911 912 void 913 AcpiDmFindResources ( 914 ACPI_PARSE_OBJECT *Root) 915 { 916 ACPI_PARSE_OBJECT *Op = Root; 917 ACPI_PARSE_OBJECT *Parent; 918 919 920 /* Walk the entire parse tree */ 921 922 while (Op) 923 { 924 /* We are interested in Buffer() declarations */ 925 926 if (Op->Common.AmlOpcode == AML_BUFFER_OP) 927 { 928 /* And only declarations of the form Name (XXXX, Buffer()... ) */ 929 930 Parent = Op->Common.Parent; 931 if (Parent->Common.AmlOpcode == AML_NAME_OP) 932 { 933 /* 934 * If the buffer is a resource template, add the individual 935 * resource descriptors to the namespace, as children of the 936 * buffer node. 937 */ 938 if (ACPI_SUCCESS (AcpiDmIsResourceTemplate (NULL, Op))) 939 { 940 Op->Common.DisasmOpcode = ACPI_DASM_RESOURCE; 941 AcpiDmAddResourcesToNamespace (Parent->Common.Node, Op); 942 } 943 } 944 } 945 946 Op = AcpiPsGetDepthNext (Root, Op); 947 } 948 } 949 950 951 /******************************************************************************* 952 * 953 * FUNCTION: AcpiDmAddResourcesToNamespace 954 * 955 * PARAMETERS: BufferNode - Node for the parent buffer 956 * Op - Parse op for the buffer 957 * 958 * RETURN: None 959 * 960 * DESCRIPTION: Add an entire resource template to the namespace. Each 961 * resource descriptor is added as a namespace node. 962 * 963 ******************************************************************************/ 964 965 static void 966 AcpiDmAddResourcesToNamespace ( 967 ACPI_NAMESPACE_NODE *BufferNode, 968 ACPI_PARSE_OBJECT *Op) 969 { 970 ACPI_PARSE_OBJECT *NextOp; 971 972 973 /* Get to the ByteData list */ 974 975 NextOp = Op->Common.Value.Arg; 976 NextOp = NextOp->Common.Next; 977 if (!NextOp) 978 { 979 return; 980 } 981 982 /* Set Node and Op to point to each other */ 983 984 BufferNode->Op = Op; 985 Op->Common.Node = BufferNode; 986 987 /* 988 * Insert each resource into the namespace 989 * NextOp contains the Aml pointer and the Aml length 990 */ 991 AcpiUtWalkAmlResources (NULL, (UINT8 *) NextOp->Named.Data, 992 (ACPI_SIZE) NextOp->Common.Value.Integer, 993 AcpiDmAddResourceToNamespace, (void **) BufferNode); 994 } 995 996 997 /******************************************************************************* 998 * 999 * FUNCTION: AcpiDmAddResourceToNamespace 1000 * 1001 * PARAMETERS: ACPI_WALK_AML_CALLBACK 1002 * BufferNode - Node for the parent buffer 1003 * 1004 * RETURN: Status 1005 * 1006 * DESCRIPTION: Add one resource descriptor to the namespace as a child of the 1007 * parent buffer. The same name is used for each descriptor. This 1008 * is changed later to a unique name if the resource is actually 1009 * referenced by an AML operator. 1010 * 1011 ******************************************************************************/ 1012 1013 static ACPI_STATUS 1014 AcpiDmAddResourceToNamespace ( 1015 UINT8 *Aml, 1016 UINT32 Length, 1017 UINT32 Offset, 1018 UINT8 ResourceIndex, 1019 void **Context) 1020 { 1021 ACPI_STATUS Status; 1022 ACPI_GENERIC_STATE ScopeInfo; 1023 ACPI_NAMESPACE_NODE *Node; 1024 1025 1026 /* TBD: Don't need to add descriptors that have no tags defined? */ 1027 1028 /* Add the resource to the namespace, as child of the buffer */ 1029 1030 ScopeInfo.Scope.Node = ACPI_CAST_PTR (ACPI_NAMESPACE_NODE, Context); 1031 Status = AcpiNsLookup (&ScopeInfo, "_TMP", ACPI_TYPE_LOCAL_RESOURCE, 1032 ACPI_IMODE_LOAD_PASS2, 1033 ACPI_NS_NO_UPSEARCH | ACPI_NS_DONT_OPEN_SCOPE | ACPI_NS_PREFIX_IS_SCOPE, 1034 NULL, &Node); 1035 if (ACPI_FAILURE (Status)) 1036 { 1037 return (AE_OK); 1038 } 1039 1040 /* Set the name to the default, changed later if resource is referenced */ 1041 1042 Node->Name.Integer = ACPI_DEFAULT_RESNAME; 1043 1044 /* Save the offset of the descriptor (within the original buffer) */ 1045 1046 Node->Value = Offset; 1047 Node->Length = Length; 1048 return (AE_OK); 1049 } 1050