1 2 /****************************************************************************** 3 * 4 * Module Name: exregion - ACPI default op_region (address space) handlers 5 * 6 *****************************************************************************/ 7 8 /* 9 * Copyright (C) 2000 - 2008, Intel Corp. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions, and the following disclaimer, 17 * without modification. 18 * 2. Redistributions in binary form must reproduce at minimum a disclaimer 19 * substantially similar to the "NO WARRANTY" disclaimer below 20 * ("Disclaimer") and any redistribution must be conditioned upon 21 * including a substantially similar Disclaimer requirement for further 22 * binary redistribution. 23 * 3. Neither the names of the above-listed copyright holders nor the names 24 * of any contributors may be used to endorse or promote products derived 25 * from this software without specific prior written permission. 26 * 27 * Alternatively, this software may be distributed under the terms of the 28 * GNU General Public License ("GPL") version 2 as published by the Free 29 * Software Foundation. 30 * 31 * NO WARRANTY 32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 33 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 34 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR 35 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 36 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 40 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 41 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 42 * POSSIBILITY OF SUCH DAMAGES. 43 */ 44 45 #include <acpi/acpi.h> 46 #include "accommon.h" 47 #include "acinterp.h" 48 49 #define _COMPONENT ACPI_EXECUTER 50 ACPI_MODULE_NAME("exregion") 51 52 /******************************************************************************* 53 * 54 * FUNCTION: acpi_ex_system_memory_space_handler 55 * 56 * PARAMETERS: Function - Read or Write operation 57 * Address - Where in the space to read or write 58 * bit_width - Field width in bits (8, 16, or 32) 59 * Value - Pointer to in or out value 60 * handler_context - Pointer to Handler's context 61 * region_context - Pointer to context specific to the 62 * accessed region 63 * 64 * RETURN: Status 65 * 66 * DESCRIPTION: Handler for the System Memory address space (Op Region) 67 * 68 ******************************************************************************/ 69 acpi_status 70 acpi_ex_system_memory_space_handler(u32 function, 71 acpi_physical_address address, 72 u32 bit_width, 73 acpi_integer * value, 74 void *handler_context, void *region_context) 75 { 76 acpi_status status = AE_OK; 77 void *logical_addr_ptr = NULL; 78 struct acpi_mem_space_context *mem_info = region_context; 79 u32 length; 80 acpi_size window_size; 81 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED 82 u32 remainder; 83 #endif 84 85 ACPI_FUNCTION_TRACE(ex_system_memory_space_handler); 86 87 /* Validate and translate the bit width */ 88 89 switch (bit_width) { 90 case 8: 91 length = 1; 92 break; 93 94 case 16: 95 length = 2; 96 break; 97 98 case 32: 99 length = 4; 100 break; 101 102 case 64: 103 length = 8; 104 break; 105 106 default: 107 ACPI_ERROR((AE_INFO, "Invalid SystemMemory width %d", 108 bit_width)); 109 return_ACPI_STATUS(AE_AML_OPERAND_VALUE); 110 } 111 112 #ifdef ACPI_MISALIGNMENT_NOT_SUPPORTED 113 /* 114 * Hardware does not support non-aligned data transfers, we must verify 115 * the request. 116 */ 117 (void)acpi_ut_short_divide((acpi_integer) address, length, NULL, 118 &remainder); 119 if (remainder != 0) { 120 return_ACPI_STATUS(AE_AML_ALIGNMENT); 121 } 122 #endif 123 124 /* 125 * Does the request fit into the cached memory mapping? 126 * Is 1) Address below the current mapping? OR 127 * 2) Address beyond the current mapping? 128 */ 129 if ((address < mem_info->mapped_physical_address) || 130 (((acpi_integer) address + length) > ((acpi_integer) 131 mem_info-> 132 mapped_physical_address + 133 mem_info->mapped_length))) { 134 /* 135 * The request cannot be resolved by the current memory mapping; 136 * Delete the existing mapping and create a new one. 137 */ 138 if (mem_info->mapped_length) { 139 140 /* Valid mapping, delete it */ 141 142 acpi_os_unmap_memory(mem_info->mapped_logical_address, 143 mem_info->mapped_length); 144 } 145 146 /* 147 * Don't attempt to map memory beyond the end of the region, and 148 * constrain the maximum mapping size to something reasonable. 149 */ 150 window_size = (acpi_size) 151 ((mem_info->address + mem_info->length) - address); 152 153 if (window_size > ACPI_SYSMEM_REGION_WINDOW_SIZE) { 154 window_size = ACPI_SYSMEM_REGION_WINDOW_SIZE; 155 } 156 157 /* Create a new mapping starting at the address given */ 158 159 mem_info->mapped_logical_address = 160 acpi_os_map_memory((acpi_physical_address) address, window_size); 161 if (!mem_info->mapped_logical_address) { 162 ACPI_ERROR((AE_INFO, 163 "Could not map memory at %8.8X%8.8X, size %X", 164 ACPI_FORMAT_NATIVE_UINT(address), 165 (u32) window_size)); 166 mem_info->mapped_length = 0; 167 return_ACPI_STATUS(AE_NO_MEMORY); 168 } 169 170 /* Save the physical address and mapping size */ 171 172 mem_info->mapped_physical_address = address; 173 mem_info->mapped_length = window_size; 174 } 175 176 /* 177 * Generate a logical pointer corresponding to the address we want to 178 * access 179 */ 180 logical_addr_ptr = mem_info->mapped_logical_address + 181 ((acpi_integer) address - 182 (acpi_integer) mem_info->mapped_physical_address); 183 184 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 185 "System-Memory (width %d) R/W %d Address=%8.8X%8.8X\n", 186 bit_width, function, 187 ACPI_FORMAT_NATIVE_UINT(address))); 188 189 /* 190 * Perform the memory read or write 191 * 192 * Note: For machines that do not support non-aligned transfers, the target 193 * address was checked for alignment above. We do not attempt to break the 194 * transfer up into smaller (byte-size) chunks because the AML specifically 195 * asked for a transfer width that the hardware may require. 196 */ 197 switch (function) { 198 case ACPI_READ: 199 200 *value = 0; 201 switch (bit_width) { 202 case 8: 203 *value = (acpi_integer) ACPI_GET8(logical_addr_ptr); 204 break; 205 206 case 16: 207 *value = (acpi_integer) ACPI_GET16(logical_addr_ptr); 208 break; 209 210 case 32: 211 *value = (acpi_integer) ACPI_GET32(logical_addr_ptr); 212 break; 213 214 case 64: 215 *value = (acpi_integer) ACPI_GET64(logical_addr_ptr); 216 break; 217 218 default: 219 /* bit_width was already validated */ 220 break; 221 } 222 break; 223 224 case ACPI_WRITE: 225 226 switch (bit_width) { 227 case 8: 228 ACPI_SET8(logical_addr_ptr) = (u8) * value; 229 break; 230 231 case 16: 232 ACPI_SET16(logical_addr_ptr) = (u16) * value; 233 break; 234 235 case 32: 236 ACPI_SET32(logical_addr_ptr) = (u32) * value; 237 break; 238 239 case 64: 240 ACPI_SET64(logical_addr_ptr) = (u64) * value; 241 break; 242 243 default: 244 /* bit_width was already validated */ 245 break; 246 } 247 break; 248 249 default: 250 status = AE_BAD_PARAMETER; 251 break; 252 } 253 254 return_ACPI_STATUS(status); 255 } 256 257 /******************************************************************************* 258 * 259 * FUNCTION: acpi_ex_system_io_space_handler 260 * 261 * PARAMETERS: Function - Read or Write operation 262 * Address - Where in the space to read or write 263 * bit_width - Field width in bits (8, 16, or 32) 264 * Value - Pointer to in or out value 265 * handler_context - Pointer to Handler's context 266 * region_context - Pointer to context specific to the 267 * accessed region 268 * 269 * RETURN: Status 270 * 271 * DESCRIPTION: Handler for the System IO address space (Op Region) 272 * 273 ******************************************************************************/ 274 275 acpi_status 276 acpi_ex_system_io_space_handler(u32 function, 277 acpi_physical_address address, 278 u32 bit_width, 279 acpi_integer * value, 280 void *handler_context, void *region_context) 281 { 282 acpi_status status = AE_OK; 283 u32 value32; 284 285 ACPI_FUNCTION_TRACE(ex_system_io_space_handler); 286 287 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 288 "System-IO (width %d) R/W %d Address=%8.8X%8.8X\n", 289 bit_width, function, 290 ACPI_FORMAT_NATIVE_UINT(address))); 291 292 /* Decode the function parameter */ 293 294 switch (function) { 295 case ACPI_READ: 296 297 status = acpi_hw_read_port((acpi_io_address) address, 298 &value32, bit_width); 299 *value = value32; 300 break; 301 302 case ACPI_WRITE: 303 304 status = acpi_hw_write_port((acpi_io_address) address, 305 (u32) * value, bit_width); 306 break; 307 308 default: 309 status = AE_BAD_PARAMETER; 310 break; 311 } 312 313 return_ACPI_STATUS(status); 314 } 315 316 /******************************************************************************* 317 * 318 * FUNCTION: acpi_ex_pci_config_space_handler 319 * 320 * PARAMETERS: Function - Read or Write operation 321 * Address - Where in the space to read or write 322 * bit_width - Field width in bits (8, 16, or 32) 323 * Value - Pointer to in or out value 324 * handler_context - Pointer to Handler's context 325 * region_context - Pointer to context specific to the 326 * accessed region 327 * 328 * RETURN: Status 329 * 330 * DESCRIPTION: Handler for the PCI Config address space (Op Region) 331 * 332 ******************************************************************************/ 333 334 acpi_status 335 acpi_ex_pci_config_space_handler(u32 function, 336 acpi_physical_address address, 337 u32 bit_width, 338 acpi_integer * value, 339 void *handler_context, void *region_context) 340 { 341 acpi_status status = AE_OK; 342 struct acpi_pci_id *pci_id; 343 u16 pci_register; 344 u32 value32; 345 346 ACPI_FUNCTION_TRACE(ex_pci_config_space_handler); 347 348 /* 349 * The arguments to acpi_os(Read|Write)pci_configuration are: 350 * 351 * pci_segment is the PCI bus segment range 0-31 352 * pci_bus is the PCI bus number range 0-255 353 * pci_device is the PCI device number range 0-31 354 * pci_function is the PCI device function number 355 * pci_register is the Config space register range 0-255 bytes 356 * 357 * Value - input value for write, output address for read 358 * 359 */ 360 pci_id = (struct acpi_pci_id *)region_context; 361 pci_register = (u16) (u32) address; 362 363 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 364 "Pci-Config %d (%d) Seg(%04x) Bus(%04x) Dev(%04x) Func(%04x) Reg(%04x)\n", 365 function, bit_width, pci_id->segment, pci_id->bus, 366 pci_id->device, pci_id->function, pci_register)); 367 368 switch (function) { 369 case ACPI_READ: 370 371 status = acpi_os_read_pci_configuration(pci_id, pci_register, 372 &value32, bit_width); 373 *value = value32; 374 break; 375 376 case ACPI_WRITE: 377 378 status = acpi_os_write_pci_configuration(pci_id, pci_register, 379 *value, bit_width); 380 break; 381 382 default: 383 384 status = AE_BAD_PARAMETER; 385 break; 386 } 387 388 return_ACPI_STATUS(status); 389 } 390 391 /******************************************************************************* 392 * 393 * FUNCTION: acpi_ex_cmos_space_handler 394 * 395 * PARAMETERS: Function - Read or Write operation 396 * Address - Where in the space to read or write 397 * bit_width - Field width in bits (8, 16, or 32) 398 * Value - Pointer to in or out value 399 * handler_context - Pointer to Handler's context 400 * region_context - Pointer to context specific to the 401 * accessed region 402 * 403 * RETURN: Status 404 * 405 * DESCRIPTION: Handler for the CMOS address space (Op Region) 406 * 407 ******************************************************************************/ 408 409 acpi_status 410 acpi_ex_cmos_space_handler(u32 function, 411 acpi_physical_address address, 412 u32 bit_width, 413 acpi_integer * value, 414 void *handler_context, void *region_context) 415 { 416 acpi_status status = AE_OK; 417 418 ACPI_FUNCTION_TRACE(ex_cmos_space_handler); 419 420 return_ACPI_STATUS(status); 421 } 422 423 /******************************************************************************* 424 * 425 * FUNCTION: acpi_ex_pci_bar_space_handler 426 * 427 * PARAMETERS: Function - Read or Write operation 428 * Address - Where in the space to read or write 429 * bit_width - Field width in bits (8, 16, or 32) 430 * Value - Pointer to in or out value 431 * handler_context - Pointer to Handler's context 432 * region_context - Pointer to context specific to the 433 * accessed region 434 * 435 * RETURN: Status 436 * 437 * DESCRIPTION: Handler for the PCI bar_target address space (Op Region) 438 * 439 ******************************************************************************/ 440 441 acpi_status 442 acpi_ex_pci_bar_space_handler(u32 function, 443 acpi_physical_address address, 444 u32 bit_width, 445 acpi_integer * value, 446 void *handler_context, void *region_context) 447 { 448 acpi_status status = AE_OK; 449 450 ACPI_FUNCTION_TRACE(ex_pci_bar_space_handler); 451 452 return_ACPI_STATUS(status); 453 } 454 455 /******************************************************************************* 456 * 457 * FUNCTION: acpi_ex_data_table_space_handler 458 * 459 * PARAMETERS: Function - Read or Write operation 460 * Address - Where in the space to read or write 461 * bit_width - Field width in bits (8, 16, or 32) 462 * Value - Pointer to in or out value 463 * handler_context - Pointer to Handler's context 464 * region_context - Pointer to context specific to the 465 * accessed region 466 * 467 * RETURN: Status 468 * 469 * DESCRIPTION: Handler for the Data Table address space (Op Region) 470 * 471 ******************************************************************************/ 472 473 acpi_status 474 acpi_ex_data_table_space_handler(u32 function, 475 acpi_physical_address address, 476 u32 bit_width, 477 acpi_integer * value, 478 void *handler_context, void *region_context) 479 { 480 ACPI_FUNCTION_TRACE(ex_data_table_space_handler); 481 482 /* Perform the memory read or write */ 483 484 switch (function) { 485 case ACPI_READ: 486 487 ACPI_MEMCPY(ACPI_CAST_PTR(char, value), 488 ACPI_PHYSADDR_TO_PTR(address), 489 ACPI_DIV_8(bit_width)); 490 break; 491 492 case ACPI_WRITE: 493 default: 494 495 return_ACPI_STATUS(AE_SUPPORT); 496 } 497 498 return_ACPI_STATUS(AE_OK); 499 } 500