Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 | // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 /****************************************************************************** * * Module Name: exregion - ACPI default op_region (address space) handlers * * Copyright (C) 2000 - 2023, Intel Corp. * *****************************************************************************/ #include <acpi/acpi.h> #include "accommon.h" #include "acinterp.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME("exregion") /******************************************************************************* * * FUNCTION: acpi_ex_system_memory_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the System Memory address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_system_memory_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { acpi_status status = AE_OK; void *logical_addr_ptr = NULL; struct acpi_mem_space_context *mem_info = region_context; struct acpi_mem_mapping *mm = mem_info->cur_mm; u32 length; acpi_size map_length; acpi_size page_boundary_map_length; #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED u32 remainder; #endif ACPI_FUNCTION_TRACE(ex_system_memory_space_handler); /* Validate and translate the bit width */ switch (bit_width) { case 8: length = 1; break; case 16: length = 2; break; case 32: length = 4; break; case 64: length = 8; break; default: ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %u", bit_width)); return_ACPI_STATUS(AE_AML_OPERAND_VALUE); } #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED /* * Hardware does not support non-aligned data transfers, we must verify * the request. */ (void)acpi_ut_short_divide((u64) address, length, NULL, &remainder); if (remainder != 0) { return_ACPI_STATUS(AE_AML_ALIGNMENT); } #endif /* * Does the request fit into the cached memory mapping? * Is 1) Address below the current mapping? OR * 2) Address beyond the current mapping? */ if (!mm || (address < mm->physical_address) || ((u64) address + length > (u64) mm->physical_address + mm->length)) { /* * The request cannot be resolved by the current memory mapping. * * Look for an existing saved mapping covering the address range * at hand. If found, save it as the current one and carry out * the access. */ for (mm = mem_info->first_mm; mm; mm = mm->next_mm) { if (mm == mem_info->cur_mm) continue; if (address < mm->physical_address) continue; if ((u64) address + length > (u64) mm->physical_address + mm->length) continue; mem_info->cur_mm = mm; goto access; } /* Create a new mappings list entry */ mm = ACPI_ALLOCATE_ZEROED(sizeof(*mm)); if (!mm) { ACPI_ERROR((AE_INFO, "Unable to save memory mapping at 0x%8.8X%8.8X, size %u", ACPI_FORMAT_UINT64(address), length)); return_ACPI_STATUS(AE_NO_MEMORY); } /* * October 2009: Attempt to map from the requested address to the * end of the region. However, we will never map more than one * page, nor will we cross a page boundary. */ map_length = (acpi_size) ((mem_info->address + mem_info->length) - address); /* * If mapping the entire remaining portion of the region will cross * a page boundary, just map up to the page boundary, do not cross. * On some systems, crossing a page boundary while mapping regions * can cause warnings if the pages have different attributes * due to resource management. * * This has the added benefit of constraining a single mapping to * one page, which is similar to the original code that used a 4k * maximum window. */ page_boundary_map_length = (acpi_size) (ACPI_ROUND_UP(address, ACPI_DEFAULT_PAGE_SIZE) - address); if (page_boundary_map_length == 0) { page_boundary_map_length = ACPI_DEFAULT_PAGE_SIZE; } if (map_length > page_boundary_map_length) { map_length = page_boundary_map_length; } /* Create a new mapping starting at the address given */ logical_addr_ptr = acpi_os_map_memory(address, map_length); if (!logical_addr_ptr) { ACPI_ERROR((AE_INFO, "Could not map memory at 0x%8.8X%8.8X, size %u", ACPI_FORMAT_UINT64(address), (u32)map_length)); ACPI_FREE(mm); return_ACPI_STATUS(AE_NO_MEMORY); } /* Save the physical address and mapping size */ mm->logical_address = logical_addr_ptr; mm->physical_address = address; mm->length = map_length; /* * Add the new entry to the mappigs list and save it as the * current mapping. */ mm->next_mm = mem_info->first_mm; mem_info->first_mm = mm; mem_info->cur_mm = mm; } access: /* * Generate a logical pointer corresponding to the address we want to * access */ logical_addr_ptr = mm->logical_address + ((u64) address - (u64) mm->physical_address); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "System-Memory (width %u) R/W %u Address=%8.8X%8.8X\n", bit_width, function, ACPI_FORMAT_UINT64(address))); /* * Perform the memory read or write * * Note: For machines that do not support non-aligned transfers, the target * address was checked for alignment above. We do not attempt to break the * transfer up into smaller (byte-size) chunks because the AML specifically * asked for a transfer width that the hardware may require. */ switch (function) { case ACPI_READ: *value = 0; switch (bit_width) { case 8: *value = (u64)ACPI_GET8(logical_addr_ptr); break; case 16: *value = (u64)ACPI_GET16(logical_addr_ptr); break; case 32: *value = (u64)ACPI_GET32(logical_addr_ptr); break; case 64: *value = (u64)ACPI_GET64(logical_addr_ptr); break; default: /* bit_width was already validated */ break; } break; case ACPI_WRITE: switch (bit_width) { case 8: ACPI_SET8(logical_addr_ptr, *value); break; case 16: ACPI_SET16(logical_addr_ptr, *value); break; case 32: ACPI_SET32(logical_addr_ptr, *value); break; case 64: ACPI_SET64(logical_addr_ptr, *value); break; default: /* bit_width was already validated */ break; } break; default: status = AE_BAD_PARAMETER; break; } return_ACPI_STATUS(status); } /******************************************************************************* * * FUNCTION: acpi_ex_system_io_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the System IO address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_system_io_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { acpi_status status = AE_OK; u32 value32; ACPI_FUNCTION_TRACE(ex_system_io_space_handler); ACPI_DEBUG_PRINT((ACPI_DB_INFO, "System-IO (width %u) R/W %u Address=%8.8X%8.8X\n", bit_width, function, ACPI_FORMAT_UINT64(address))); /* Decode the function parameter */ switch (function) { case ACPI_READ: status = acpi_hw_read_port((acpi_io_address)address, &value32, bit_width); *value = value32; break; case ACPI_WRITE: status = acpi_hw_write_port((acpi_io_address)address, (u32)*value, bit_width); break; default: status = AE_BAD_PARAMETER; break; } return_ACPI_STATUS(status); } #ifdef ACPI_PCI_CONFIGURED /******************************************************************************* * * FUNCTION: acpi_ex_pci_config_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the PCI Config address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_pci_config_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { acpi_status status = AE_OK; struct acpi_pci_id *pci_id; u16 pci_register; ACPI_FUNCTION_TRACE(ex_pci_config_space_handler); /* * The arguments to acpi_os(Read|Write)pci_configuration are: * * pci_segment is the PCI bus segment range 0-31 * pci_bus is the PCI bus number range 0-255 * pci_device is the PCI device number range 0-31 * pci_function is the PCI device function number * pci_register is the Config space register range 0-255 bytes * * value - input value for write, output address for read * */ pci_id = (struct acpi_pci_id *)region_context; pci_register = (u16) (u32) address; ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Pci-Config %u (%u) Seg(%04x) Bus(%04x) " "Dev(%04x) Func(%04x) Reg(%04x)\n", function, bit_width, pci_id->segment, pci_id->bus, pci_id->device, pci_id->function, pci_register)); switch (function) { case ACPI_READ: *value = 0; status = acpi_os_read_pci_configuration(pci_id, pci_register, value, bit_width); break; case ACPI_WRITE: status = acpi_os_write_pci_configuration(pci_id, pci_register, *value, bit_width); break; default: status = AE_BAD_PARAMETER; break; } return_ACPI_STATUS(status); } #endif /******************************************************************************* * * FUNCTION: acpi_ex_cmos_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the CMOS address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_cmos_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { acpi_status status = AE_OK; ACPI_FUNCTION_TRACE(ex_cmos_space_handler); return_ACPI_STATUS(status); } #ifdef ACPI_PCI_CONFIGURED /******************************************************************************* * * FUNCTION: acpi_ex_pci_bar_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the PCI bar_target address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_pci_bar_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { acpi_status status = AE_OK; ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler); return_ACPI_STATUS(status); } #endif /******************************************************************************* * * FUNCTION: acpi_ex_data_table_space_handler * * PARAMETERS: function - Read or Write operation * address - Where in the space to read or write * bit_width - Field width in bits (8, 16, or 32) * value - Pointer to in or out value * handler_context - Pointer to Handler's context * region_context - Pointer to context specific to the * accessed region * * RETURN: Status * * DESCRIPTION: Handler for the Data Table address space (Op Region) * ******************************************************************************/ acpi_status acpi_ex_data_table_space_handler(u32 function, acpi_physical_address address, u32 bit_width, u64 *value, void *handler_context, void *region_context) { struct acpi_data_table_mapping *mapping; char *pointer; ACPI_FUNCTION_TRACE(ex_data_table_space_handler); mapping = (struct acpi_data_table_mapping *) region_context; pointer = ACPI_CAST_PTR(char, mapping->pointer) + (address - ACPI_PTR_TO_PHYSADDR(mapping->pointer)); /* * Perform the memory read or write. The bit_width was already * validated. */ switch (function) { case ACPI_READ: memcpy(ACPI_CAST_PTR(char, value), pointer, ACPI_DIV_8(bit_width)); break; case ACPI_WRITE: memcpy(pointer, ACPI_CAST_PTR(char, value), ACPI_DIV_8(bit_width)); break; default: return_ACPI_STATUS(AE_BAD_PARAMETER); } return_ACPI_STATUS(AE_OK); } |