| c3902377 |
1 | /*++\r |
| 2 | \r |
| 3e0578d2 |
3 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
| 4 | All rights reserved. This program and the accompanying materials\r |
| 5 | are licensed and made available under the terms and conditions of the BSD License\r |
| 6 | which accompanies this distribution. The full text of the license may be found at\r |
| 7 | http://opensource.org/licenses/bsd-license.php\r |
| c3902377 |
8 | \r |
| 3e0578d2 |
9 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 10 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| c3902377 |
11 | \r |
| 12 | Module Name:\r |
| 13 | \r |
| 14 | IsaIo.c\r |
| 15 | \r |
| 16 | Abstract:\r |
| 17 | \r |
| 18 | The implementation for EFI_ISA_IO_PROTOCOL. \r |
| 19 | \r |
| 20 | --*/\r |
| 21 | \r |
| 22 | //\r |
| 23 | // Include common header file for this module.\r |
| 24 | //\r |
| 25 | #include "InternalIsaIo.h"\r |
| 26 | \r |
| 27 | #include <IndustryStandard/Pcat.h>\r |
| 28 | \r |
| 29 | //\r |
| 30 | // Driver Support Global Variables\r |
| 31 | //\r |
| 32 | EFI_ISA_IO_PROTOCOL IsaIoInterface = {\r |
| 33 | { \r |
| 34 | IsaIoMemRead,\r |
| 35 | IsaIoMemWrite\r |
| 36 | },\r |
| 37 | { \r |
| 38 | IsaIoIoRead,\r |
| 39 | IsaIoIoWrite\r |
| 40 | },\r |
| 41 | IsaIoCopyMem,\r |
| 42 | IsaIoMap,\r |
| 43 | IsaIoUnmap,\r |
| 44 | IsaIoAllocateBuffer,\r |
| 45 | IsaIoFreeBuffer,\r |
| 46 | IsaIoFlush,\r |
| 47 | NULL,\r |
| 48 | 0,\r |
| 49 | NULL\r |
| 50 | };\r |
| 51 | \r |
| 52 | static EFI_ISA_DMA_REGISTERS DmaRegisters[8] = {\r |
| 53 | {\r |
| 54 | 0x00,\r |
| 55 | 0x87,\r |
| 56 | 0x01\r |
| 57 | },\r |
| 58 | {\r |
| 59 | 0x02,\r |
| 60 | 0x83,\r |
| 61 | 0x03\r |
| 62 | },\r |
| 63 | {\r |
| 64 | 0x04,\r |
| 65 | 0x81,\r |
| 66 | 0x05\r |
| 67 | },\r |
| 68 | {\r |
| 69 | 0x06,\r |
| 70 | 0x82,\r |
| 71 | 0x07\r |
| 72 | },\r |
| 73 | {\r |
| 74 | 0x00,\r |
| 75 | 0x00,\r |
| 76 | 0x00\r |
| 77 | }, // Channel 4 is invalid\r |
| 78 | {\r |
| 79 | 0xC4,\r |
| 80 | 0x8B,\r |
| 81 | 0xC6\r |
| 82 | },\r |
| 83 | {\r |
| 84 | 0xC8,\r |
| 85 | 0x89,\r |
| 86 | 0xCA\r |
| 87 | },\r |
| 88 | {\r |
| 89 | 0xCC,\r |
| 90 | 0x8A,\r |
| 91 | 0xCE\r |
| 92 | },\r |
| 93 | };\r |
| 94 | \r |
| 95 | EFI_STATUS\r |
| 96 | ReportErrorStatusCode (\r |
| 97 | EFI_STATUS_CODE_VALUE Code\r |
| 98 | )\r |
| 99 | /*++\r |
| 100 | \r |
| 101 | Routine Description:\r |
| 102 | \r |
| 103 | report a error Status code of PCI bus driver controller\r |
| 104 | \r |
| 105 | Arguments:\r |
| 106 | \r |
| 107 | Code - The error status code.\r |
| 108 | \r |
| 109 | Returns:\r |
| 110 | \r |
| 111 | EFI_SUCCESS - Success to report status code.\r |
| 112 | \r |
| 113 | \r |
| 114 | --*/\r |
| 115 | {\r |
| 116 | return REPORT_STATUS_CODE (\r |
| 117 | EFI_ERROR_CODE | EFI_ERROR_MINOR,\r |
| 118 | Code\r |
| 119 | );\r |
| 120 | }\r |
| 121 | \r |
| 122 | //\r |
| 123 | // Driver Support Functions\r |
| 124 | //\r |
| 125 | \r |
| 126 | EFI_STATUS\r |
| 127 | InitializeIsaIoInstance (\r |
| 128 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
| 129 | IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList\r |
| 130 | )\r |
| 131 | /*++\r |
| 132 | \r |
| 133 | Routine Description:\r |
| 134 | \r |
| 135 | Initializes an ISA I/O Instance\r |
| 136 | \r |
| 137 | Arguments:\r |
| 138 | \r |
| 139 | IsaIoDevice - The iso device to be initialized.\r |
| 140 | IsaDeviceResourceList - The resource list.\r |
| 141 | \r |
| 142 | Returns:\r |
| 143 | \r |
| 144 | EFI_SUCCESS - Initial success.\r |
| 145 | \r |
| 146 | --*/\r |
| 147 | {\r |
| 148 | //\r |
| 149 | // Initializes an ISA I/O Instance\r |
| 150 | //\r |
| 151 | CopyMem (\r |
| 152 | &IsaIoDevice->IsaIo,\r |
| 153 | &IsaIoInterface,\r |
| 154 | sizeof (EFI_ISA_IO_PROTOCOL)\r |
| 155 | );\r |
| 156 | \r |
| 157 | IsaIoDevice->IsaIo.ResourceList = IsaDeviceResourceList;\r |
| 158 | \r |
| 159 | return EFI_SUCCESS;\r |
| 160 | }\r |
| 161 | \r |
| 162 | EFI_STATUS\r |
| 163 | EFIAPI\r |
| 164 | IsaIoIoRead (\r |
| 165 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 166 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 167 | IN UINT32 Offset,\r |
| 168 | IN UINTN Count,\r |
| 169 | IN OUT VOID *Buffer\r |
| 170 | )\r |
| 171 | /*++\r |
| 172 | \r |
| 173 | Routine Description:\r |
| 174 | \r |
| 175 | Performs an ISA I/O Read Cycle\r |
| 176 | \r |
| 177 | Arguments:\r |
| 178 | \r |
| 179 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 180 | Width - Signifies the width of the I/O operation.\r |
| 181 | Offset - The offset in ISA I/O space to start the I/O operation. \r |
| 182 | Count - The number of I/O operations to perform. \r |
| 183 | Buffer - The destination buffer to store the results\r |
| 184 | \r |
| 185 | Returns:\r |
| 186 | \r |
| 187 | EFI_SUCCESS - The data was read from the device sucessfully.\r |
| 188 | EFI_UNSUPPORTED - The Offset is not valid for this device.\r |
| 189 | EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.\r |
| 190 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 191 | \r |
| 192 | --*/\r |
| 193 | {\r |
| 194 | EFI_STATUS Status;\r |
| 195 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 196 | \r |
| 197 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 198 | \r |
| 199 | //\r |
| 200 | // Verify Isa IO Access\r |
| 201 | //\r |
| 202 | Status = IsaIoVerifyAccess (\r |
| 203 | IsaIoDevice,\r |
| 204 | IsaAccessTypeIo,\r |
| 205 | Width,\r |
| 206 | Count,\r |
| 207 | &Offset\r |
| 208 | );\r |
| 209 | if (EFI_ERROR (Status)) {\r |
| 210 | return Status;\r |
| 211 | }\r |
| 212 | //\r |
| 213 | // Call PciIo->Io.Read\r |
| 214 | //\r |
| 215 | Status = IsaIoDevice->PciIo->Io.Read (\r |
| 216 | IsaIoDevice->PciIo,\r |
| 217 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| 218 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 219 | Offset,\r |
| 220 | Count,\r |
| 221 | Buffer\r |
| 222 | );\r |
| 223 | \r |
| 224 | if (EFI_ERROR (Status)) {\r |
| 225 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 226 | }\r |
| 227 | \r |
| 228 | return Status;\r |
| 229 | }\r |
| 230 | \r |
| 231 | EFI_STATUS\r |
| 232 | EFIAPI\r |
| 233 | IsaIoIoWrite (\r |
| 234 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 235 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 236 | IN UINT32 Offset,\r |
| 237 | IN UINTN Count,\r |
| 238 | IN OUT VOID *Buffer\r |
| 239 | )\r |
| 240 | /*++\r |
| 241 | \r |
| 242 | Routine Description:\r |
| 243 | \r |
| 244 | Performs an ISA I/O Write Cycle\r |
| 245 | \r |
| 246 | Arguments:\r |
| 247 | \r |
| 248 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 249 | Width - Signifies the width of the I/O operation.\r |
| 250 | Offset - The offset in ISA I/O space to start the I/O operation. \r |
| 251 | Count - The number of I/O operations to perform. \r |
| 252 | Buffer - The source buffer to write data from\r |
| 253 | \r |
| 254 | Returns:\r |
| 255 | \r |
| 256 | EFI_SUCCESS - The data was writen to the device sucessfully.\r |
| 257 | EFI_UNSUPPORTED - The Offset is not valid for this device.\r |
| 258 | EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.\r |
| 259 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 260 | \r |
| 261 | --*/\r |
| 262 | {\r |
| 263 | EFI_STATUS Status;\r |
| 264 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 265 | \r |
| 266 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 267 | \r |
| 268 | //\r |
| 269 | // Verify Isa IO Access\r |
| 270 | //\r |
| 271 | Status = IsaIoVerifyAccess (\r |
| 272 | IsaIoDevice,\r |
| 273 | IsaAccessTypeIo,\r |
| 274 | Width,\r |
| 275 | Count,\r |
| 276 | &Offset\r |
| 277 | );\r |
| 278 | if (EFI_ERROR (Status)) {\r |
| 279 | return Status;\r |
| 280 | }\r |
| 281 | //\r |
| 282 | // Call PciIo->Io.Write\r |
| 283 | //\r |
| 284 | Status = IsaIoDevice->PciIo->Io.Write (\r |
| 285 | IsaIoDevice->PciIo,\r |
| 286 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| 287 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 288 | Offset,\r |
| 289 | Count,\r |
| 290 | Buffer\r |
| 291 | );\r |
| 292 | \r |
| 293 | if (EFI_ERROR (Status)) {\r |
| 294 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 295 | }\r |
| 296 | \r |
| 297 | return Status;\r |
| 298 | }\r |
| 299 | \r |
| 300 | EFI_STATUS\r |
| 301 | WritePort (\r |
| 302 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 303 | IN UINT32 Offset,\r |
| 304 | IN UINT8 Value\r |
| 305 | )\r |
| 306 | /*++\r |
| 307 | \r |
| 308 | Routine Description:\r |
| 309 | \r |
| 310 | Writes an 8 bit I/O Port\r |
| 311 | \r |
| 312 | Arguments:\r |
| 313 | \r |
| 314 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 315 | Offset - The offset in ISA IO space to start the IO operation. \r |
| 316 | Value - The data to write port.\r |
| 317 | \r |
| 318 | Returns:\r |
| 319 | \r |
| 320 | EFI_SUCCESS - Success.\r |
| 321 | EFI_INVALID_PARAMETER - Parameter is invalid.\r |
| 322 | EFI_UNSUPPORTED - The address range specified by Offset is not valid.\r |
| 323 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 324 | \r |
| 325 | --*/\r |
| 326 | {\r |
| 327 | EFI_STATUS Status;\r |
| 328 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 329 | \r |
| 330 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 331 | \r |
| 332 | //\r |
| 333 | // Call PciIo->Io.Write\r |
| 334 | //\r |
| 335 | Status = IsaIoDevice->PciIo->Io.Write (\r |
| 336 | IsaIoDevice->PciIo,\r |
| 337 | EfiPciIoWidthUint8,\r |
| 338 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 339 | Offset,\r |
| 340 | 1,\r |
| 341 | &Value\r |
| 342 | );\r |
| 343 | if (EFI_ERROR (Status)) {\r |
| 344 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 345 | return Status;\r |
| 346 | }\r |
| 347 | \r |
| 348 | gBS->Stall (50);\r |
| 349 | \r |
| 350 | return EFI_SUCCESS;\r |
| 351 | }\r |
| 352 | \r |
| 353 | EFI_STATUS\r |
| 354 | WriteDmaPort (\r |
| 355 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 356 | IN UINT32 AddrOffset,\r |
| 357 | IN UINT32 PageOffset,\r |
| 358 | IN UINT32 CountOffset,\r |
| 359 | IN UINT32 BaseAddress,\r |
| 360 | IN UINT16 Count\r |
| 361 | )\r |
| 362 | /*++\r |
| 363 | \r |
| 364 | Routine Description:\r |
| 365 | \r |
| 366 | Writes I/O operation base address and count number to a 8 bit I/O Port.\r |
| 367 | \r |
| 368 | Arguments:\r |
| 369 | \r |
| 370 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 371 | AddrOffset - The address' offset.\r |
| 372 | PageOffset - The page's offest.\r |
| 373 | CountOffset - The count's offset.\r |
| 374 | BaseAddress - The base address.\r |
| 375 | Count - The number of I/O operations to perform. \r |
| 376 | \r |
| 377 | Returns:\r |
| 378 | \r |
| 379 | EFI_SUCCESS - Success.\r |
| 380 | EFI_INVALID_PARAMETER - Parameter is invalid.\r |
| 381 | EFI_UNSUPPORTED - The address range specified by these Offsets and Count is not valid.\r |
| 382 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 383 | \r |
| 384 | --*/\r |
| 385 | {\r |
| 386 | EFI_STATUS Status;\r |
| 387 | \r |
| 388 | Status = WritePort (This, AddrOffset, (UINT8) (BaseAddress & 0xff));\r |
| 389 | if (EFI_ERROR (Status)) {\r |
| 390 | return Status;\r |
| 391 | }\r |
| 392 | \r |
| 393 | Status = WritePort (This, AddrOffset, (UINT8) ((BaseAddress >> 8) & 0xff));\r |
| 394 | if (EFI_ERROR (Status)) {\r |
| 395 | return Status;\r |
| 396 | }\r |
| 397 | \r |
| 398 | Status = WritePort (This, PageOffset, (UINT8) ((BaseAddress >> 16) & 0xff));\r |
| 399 | if (EFI_ERROR (Status)) {\r |
| 400 | return Status;\r |
| 401 | }\r |
| 402 | \r |
| 403 | Status = WritePort (This, CountOffset, (UINT8) (Count & 0xff));\r |
| 404 | if (EFI_ERROR (Status)) {\r |
| 405 | return Status;\r |
| 406 | }\r |
| 407 | \r |
| 408 | Status = WritePort (This, CountOffset, (UINT8) ((Count >> 8) & 0xff));\r |
| 409 | if (EFI_ERROR (Status)) {\r |
| 410 | return Status;\r |
| 411 | }\r |
| 412 | \r |
| 413 | return EFI_SUCCESS;\r |
| 414 | }\r |
| 415 | \r |
| 416 | EFI_STATUS\r |
| 417 | EFIAPI\r |
| 418 | IsaIoUnmap (\r |
| 419 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 420 | IN VOID *Mapping\r |
| 421 | )\r |
| 422 | /*++\r |
| 423 | \r |
| 424 | Routine Description:\r |
| 425 | \r |
| 426 | Unmaps a memory region for DMA\r |
| 427 | \r |
| 428 | Arguments:\r |
| 429 | \r |
| 430 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 431 | Mapping - The mapping value returned from EFI_ISA_IO.Map().\r |
| 432 | \r |
| 433 | Returns:\r |
| 434 | \r |
| 435 | EFI_SUCCESS - The range was unmapped.\r |
| 436 | EFI_DEVICE_ERROR - The data was not committed to the target system memory.\r |
| 437 | \r |
| 438 | --*/\r |
| 439 | {\r |
| 440 | ISA_MAP_INFO *IsaMapInfo;\r |
| 441 | \r |
| 442 | //\r |
| 443 | // Unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| 444 | //\r |
| 445 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
| 446 | return EFI_UNSUPPORTED;\r |
| 447 | }\r |
| 448 | \r |
| 449 | //\r |
| 450 | // See if the Map() operation associated with this Unmap() required a mapping\r |
| 451 | // buffer.If a mapping buffer was not required, then this function simply\r |
| 452 | // returns EFI_SUCCESS.\r |
| 453 | //\r |
| 454 | if (Mapping != NULL) {\r |
| 455 | //\r |
| 456 | // Get the MAP_INFO structure from Mapping\r |
| 457 | //\r |
| 458 | IsaMapInfo = (ISA_MAP_INFO *) Mapping;\r |
| 459 | \r |
| 460 | //\r |
| 461 | // If this is a write operation from the Agent's point of view,\r |
| 462 | // then copy the contents of the mapped buffer into the real buffer\r |
| 463 | // so the processor can read the contents of the real buffer.\r |
| 464 | //\r |
| 465 | if (IsaMapInfo->Operation == EfiIsaIoOperationBusMasterWrite) {\r |
| 466 | CopyMem (\r |
| 467 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| 468 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| 469 | IsaMapInfo->NumberOfBytes\r |
| 470 | );\r |
| 471 | }\r |
| 472 | //\r |
| 473 | // Free the mapped buffer and the MAP_INFO structure.\r |
| 474 | //\r |
| 475 | gBS->FreePages (IsaMapInfo->MappedHostAddress, IsaMapInfo->NumberOfPages);\r |
| 476 | gBS->FreePool (IsaMapInfo);\r |
| 477 | }\r |
| 478 | \r |
| 479 | return EFI_SUCCESS;\r |
| 480 | }\r |
| 481 | \r |
| 482 | EFI_STATUS\r |
| 483 | EFIAPI\r |
| 484 | IsaIoFlush (\r |
| 485 | IN EFI_ISA_IO_PROTOCOL *This\r |
| 486 | )\r |
| 487 | /*++\r |
| 488 | \r |
| 489 | Routine Description:\r |
| 490 | \r |
| 491 | Flushes a DMA buffer\r |
| 492 | \r |
| 493 | Arguments:\r |
| 494 | \r |
| 495 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 496 | \r |
| 497 | Returns:\r |
| 498 | \r |
| 499 | EFI_SUCCESS - The buffers were flushed.\r |
| 500 | EFI_DEVICE_ERROR - The buffers were not flushed due to a hardware error.\r |
| 501 | \r |
| 502 | --*/\r |
| 503 | {\r |
| 504 | EFI_STATUS Status;\r |
| 505 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 506 | \r |
| 507 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 508 | \r |
| 509 | //\r |
| 510 | // Call PciIo->Flush\r |
| 511 | //\r |
| 512 | Status = IsaIoDevice->PciIo->Flush (IsaIoDevice->PciIo);\r |
| 513 | \r |
| 514 | if (EFI_ERROR (Status)) {\r |
| 515 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 516 | }\r |
| 517 | \r |
| 518 | return Status;\r |
| 519 | }\r |
| 520 | \r |
| 521 | EFI_STATUS\r |
| 522 | IsaIoVerifyAccess (\r |
| 523 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
| 524 | IN ISA_ACCESS_TYPE Type,\r |
| 525 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 526 | IN UINTN Count,\r |
| 527 | IN OUT UINT32 *Offset\r |
| 528 | )\r |
| 529 | /*++\r |
| 530 | \r |
| 531 | Routine Description:\r |
| 532 | \r |
| 533 | Verifies access to an ISA device\r |
| 534 | \r |
| 535 | Arguments:\r |
| 536 | \r |
| 537 | IsaIoDevice - The ISA device to be verified.\r |
| 538 | Type - The Access type. The input must be either IsaAccessTypeMem or IsaAccessTypeIo.\r |
| 539 | Width - Signifies the width of the memory operation.\r |
| 540 | Count - The number of memory operations to perform. \r |
| 541 | Offset - The offset in ISA memory space to start the memory operation. \r |
| 542 | \r |
| 543 | Returns:\r |
| 544 | \r |
| 545 | EFI_SUCCESS - Verify success.\r |
| 546 | EFI_INVALID_PARAMETER - One of the parameters has an invalid value.\r |
| 547 | EFI_UNSUPPORTED - The device ont support the access type.\r |
| 548 | \r |
| 549 | --*/\r |
| 550 | {\r |
| 551 | EFI_ISA_ACPI_RESOURCE *Item;\r |
| 552 | EFI_STATUS Status;\r |
| 553 | \r |
| 554 | if (Width < EfiIsaIoWidthUint8 ||\r |
| 555 | Width >= EfiIsaIoWidthMaximum ||\r |
| 556 | Width == EfiIsaIoWidthReserved ||\r |
| 557 | Width == EfiIsaIoWidthFifoReserved ||\r |
| 558 | Width == EfiIsaIoWidthFillReserved\r |
| 559 | ) {\r |
| 560 | return EFI_INVALID_PARAMETER;\r |
| 561 | }\r |
| 562 | \r |
| 563 | //\r |
| 564 | // If Width is EfiIsaIoWidthFifoUintX then convert to EfiIsaIoWidthUintX\r |
| 565 | // If Width is EfiIsaIoWidthFillUintX then convert to EfiIsaIoWidthUintX\r |
| 566 | //\r |
| 567 | if (Width >= EfiIsaIoWidthFifoUint8 && Width <= EfiIsaIoWidthFifoReserved) {\r |
| 568 | Count = 1;\r |
| 569 | }\r |
| 570 | \r |
| 571 | Width = (EFI_ISA_IO_PROTOCOL_WIDTH) (Width & 0x03);\r |
| 572 | \r |
| 573 | Status = EFI_UNSUPPORTED;\r |
| 574 | Item = IsaIoDevice->IsaIo.ResourceList->ResourceItem;\r |
| 575 | while (Item->Type != EfiIsaAcpiResourceEndOfList) {\r |
| 576 | if ((Type == IsaAccessTypeMem && Item->Type == EfiIsaAcpiResourceMemory) ||\r |
| 577 | (Type == IsaAccessTypeIo && Item->Type == EfiIsaAcpiResourceIo)\r |
| 578 | ) {\r |
| 579 | if (*Offset >= Item->StartRange && (*Offset + Count * (UINT32)(1 << Width)) - 1 <= Item->EndRange) {\r |
| 580 | return EFI_SUCCESS;\r |
| 581 | }\r |
| 582 | \r |
| 583 | if (*Offset >= Item->StartRange && *Offset <= Item->EndRange) {\r |
| 584 | Status = EFI_INVALID_PARAMETER;\r |
| 585 | }\r |
| 586 | }\r |
| 587 | \r |
| 588 | Item++;\r |
| 589 | }\r |
| 590 | \r |
| 591 | return Status;\r |
| 592 | }\r |
| 593 | \r |
| 594 | EFI_STATUS\r |
| 595 | EFIAPI\r |
| 596 | IsaIoMemRead (\r |
| 597 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 598 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 599 | IN UINT32 Offset,\r |
| 600 | IN UINTN Count,\r |
| 601 | IN OUT VOID *Buffer\r |
| 602 | )\r |
| 603 | /*++\r |
| 604 | \r |
| 605 | Routine Description:\r |
| 606 | \r |
| 607 | Performs an ISA Memory Read Cycle\r |
| 608 | \r |
| 609 | Arguments:\r |
| 610 | \r |
| 611 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 612 | Width - Signifies the width of the memory operation.\r |
| 613 | Offset - The offset in ISA memory space to start the memory operation. \r |
| 614 | Count - The number of memory operations to perform. \r |
| 615 | Buffer - The destination buffer to store the results\r |
| 616 | \r |
| 617 | Returns:\r |
| 618 | \r |
| 619 | EFI_SUCCESS - The data was read from the device successfully.\r |
| 620 | EFI_UNSUPPORTED - The Offset is not valid for this device.\r |
| 621 | EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.\r |
| 622 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 623 | \r |
| 624 | --*/\r |
| 625 | {\r |
| 626 | EFI_STATUS Status;\r |
| 627 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 628 | \r |
| 629 | //\r |
| 630 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
| 631 | // ISA Bus Master.\r |
| 632 | //\r |
| 633 | // So we just return EFI_UNSUPPORTED for these functions.\r |
| 634 | //\r |
| 635 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| 636 | return EFI_UNSUPPORTED;\r |
| 637 | }\r |
| 638 | \r |
| 639 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 640 | \r |
| 641 | //\r |
| 642 | // Verify the Isa Io Access\r |
| 643 | //\r |
| 644 | Status = IsaIoVerifyAccess (\r |
| 645 | IsaIoDevice,\r |
| 646 | IsaAccessTypeMem,\r |
| 647 | Width,\r |
| 648 | Count,\r |
| 649 | &Offset\r |
| 650 | );\r |
| 651 | if (EFI_ERROR (Status)) {\r |
| 652 | return Status;\r |
| 653 | }\r |
| 654 | //\r |
| 655 | // Call PciIo->Mem.Read\r |
| 656 | //\r |
| 657 | Status = IsaIoDevice->PciIo->Mem.Read (\r |
| 658 | IsaIoDevice->PciIo,\r |
| 659 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| 660 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 661 | Offset,\r |
| 662 | Count,\r |
| 663 | Buffer\r |
| 664 | );\r |
| 665 | \r |
| 666 | if (EFI_ERROR (Status)) {\r |
| 667 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 668 | }\r |
| 669 | \r |
| 670 | return Status;\r |
| 671 | }\r |
| 672 | \r |
| 673 | EFI_STATUS\r |
| 674 | EFIAPI\r |
| 675 | IsaIoMemWrite (\r |
| 676 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 677 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 678 | IN UINT32 Offset,\r |
| 679 | IN UINTN Count,\r |
| 680 | IN OUT VOID *Buffer\r |
| 681 | )\r |
| 682 | /*++\r |
| 683 | \r |
| 684 | Routine Description:\r |
| 685 | \r |
| 686 | Performs an ISA Memory Write Cycle\r |
| 687 | \r |
| 688 | Arguments:\r |
| 689 | \r |
| 690 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance. \r |
| 691 | Width - Signifies the width of the memory operation.\r |
| 692 | Offset - The offset in ISA memory space to start the memory operation. \r |
| 693 | Count - The number of memory operations to perform. \r |
| 694 | Buffer - The source buffer to write data from\r |
| 695 | \r |
| 696 | Returns:\r |
| 697 | \r |
| 698 | EFI_SUCCESS - The data was written to the device sucessfully.\r |
| 699 | EFI_UNSUPPORTED - The Offset is not valid for this device.\r |
| 700 | EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.\r |
| 701 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 702 | \r |
| 703 | --*/\r |
| 704 | {\r |
| 705 | EFI_STATUS Status;\r |
| 706 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 707 | \r |
| 708 | //\r |
| 709 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
| 710 | // ISA Bus Master.\r |
| 711 | //\r |
| 712 | // So we just return EFI_UNSUPPORTED for these functions.\r |
| 713 | //\r |
| 714 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| 715 | return EFI_UNSUPPORTED;\r |
| 716 | }\r |
| 717 | \r |
| 718 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 719 | \r |
| 720 | //\r |
| 721 | // Verify Isa IO Access\r |
| 722 | //\r |
| 723 | Status = IsaIoVerifyAccess (\r |
| 724 | IsaIoDevice,\r |
| 725 | IsaAccessTypeMem,\r |
| 726 | Width,\r |
| 727 | Count,\r |
| 728 | &Offset\r |
| 729 | );\r |
| 730 | if (EFI_ERROR (Status)) {\r |
| 731 | return Status;\r |
| 732 | }\r |
| 733 | //\r |
| 734 | // Call PciIo->Mem.Write\r |
| 735 | //\r |
| 736 | Status = IsaIoDevice->PciIo->Mem.Write (\r |
| 737 | IsaIoDevice->PciIo,\r |
| 738 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| 739 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 740 | Offset,\r |
| 741 | Count,\r |
| 742 | Buffer\r |
| 743 | );\r |
| 744 | \r |
| 745 | if (EFI_ERROR (Status)) {\r |
| 746 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 747 | }\r |
| 748 | \r |
| 749 | return Status;\r |
| 750 | }\r |
| 751 | \r |
| 752 | EFI_STATUS\r |
| 753 | EFIAPI\r |
| 754 | IsaIoCopyMem (\r |
| 755 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 756 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| 757 | IN UINT32 DestOffset,\r |
| 758 | IN UINT32 SrcOffset,\r |
| 759 | IN UINTN Count\r |
| 760 | )\r |
| 761 | /*++\r |
| 762 | \r |
| 763 | Routine Description:\r |
| 764 | \r |
| 765 | Performs an ISA I/O Copy Memory \r |
| 766 | \r |
| 767 | Arguments:\r |
| 768 | \r |
| 769 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 770 | Width - Signifies the width of the memory copy operation.\r |
| 771 | DestOffset - The offset of the destination \r |
| 772 | SrcOffset - The offset of the source\r |
| 773 | Count - The number of memory copy operations to perform\r |
| 774 | \r |
| 775 | Returns:\r |
| 776 | \r |
| 777 | EFI_SUCCESS - The data was copied sucessfully.\r |
| 778 | EFI_UNSUPPORTED - The DestOffset or SrcOffset is not valid for this device.\r |
| 779 | EFI_INVALID_PARAMETER - Width or Count, or both, were invalid.\r |
| 780 | EFI_OUT_OF_RESOURCES - The request could not be completed due to a lack of resources.\r |
| 781 | \r |
| 782 | --*/\r |
| 783 | {\r |
| 784 | EFI_STATUS Status;\r |
| 785 | ISA_IO_DEVICE *IsaIoDevice;\r |
| 786 | \r |
| 787 | //\r |
| 788 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
| 789 | // ISA Bus Master.\r |
| 790 | //\r |
| 791 | // So we just return EFI_UNSUPPORTED for these functions.\r |
| 792 | //\r |
| 793 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| 794 | return EFI_UNSUPPORTED;\r |
| 795 | }\r |
| 796 | \r |
| 797 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| 798 | \r |
| 799 | //\r |
| 800 | // Verify Isa IO Access for destination and source\r |
| 801 | //\r |
| 802 | Status = IsaIoVerifyAccess (\r |
| 803 | IsaIoDevice,\r |
| 804 | IsaAccessTypeMem,\r |
| 805 | Width,\r |
| 806 | Count,\r |
| 807 | &DestOffset\r |
| 808 | );\r |
| 809 | if (EFI_ERROR (Status)) {\r |
| 810 | return Status;\r |
| 811 | }\r |
| 812 | \r |
| 813 | Status = IsaIoVerifyAccess (\r |
| 814 | IsaIoDevice,\r |
| 815 | IsaAccessTypeMem,\r |
| 816 | Width,\r |
| 817 | Count,\r |
| 818 | &SrcOffset\r |
| 819 | );\r |
| 820 | if (EFI_ERROR (Status)) {\r |
| 821 | return Status;\r |
| 822 | }\r |
| 823 | //\r |
| 824 | // Call PciIo->CopyMem\r |
| 825 | //\r |
| 826 | Status = IsaIoDevice->PciIo->CopyMem (\r |
| 827 | IsaIoDevice->PciIo,\r |
| 828 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| 829 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 830 | DestOffset,\r |
| 831 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| 832 | SrcOffset,\r |
| 833 | Count\r |
| 834 | );\r |
| 835 | \r |
| 836 | if (EFI_ERROR (Status)) {\r |
| 837 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 838 | }\r |
| 839 | \r |
| 840 | return Status;\r |
| 841 | }\r |
| 842 | \r |
| 843 | STATIC\r |
| 844 | EFI_STATUS\r |
| 845 | IsaIoMap_OnlySupportSlaveReadWrite (\r |
| 846 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 847 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| 848 | IN UINT8 ChannelNumber OPTIONAL,\r |
| 849 | IN UINT32 ChannelAttributes,\r |
| 850 | IN VOID *HostAddress,\r |
| 851 | IN OUT UINTN *NumberOfBytes,\r |
| 852 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| 853 | OUT VOID **Mapping\r |
| 854 | )\r |
| 855 | /*++\r |
| 856 | \r |
| 857 | Routine Description:\r |
| 858 | \r |
| 859 | Maps a memory region for DMA, note this implementation\r |
| 860 | only supports slave read/write operation to save code size.\r |
| 861 | \r |
| 862 | Arguments:\r |
| 863 | \r |
| 864 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 865 | Operation - Indicates the type of DMA (slave or bus master), and if \r |
| 866 | the DMA operation is going to read or write to system memory. \r |
| 867 | ChannelNumber - The slave channel number to use for this DMA operation. \r |
| 868 | If Operation and ChannelAttributes shows that this device \r |
| 869 | performs bus mastering DMA, then this field is ignored. \r |
| 870 | The legal range for this field is 0..7. \r |
| 871 | ChannelAttributes - The attributes of the DMA channel to use for this DMA operation\r |
| 872 | HostAddress - The system memory address to map to the device. \r |
| 873 | NumberOfBytes - On input the number of bytes to map. On output the number \r |
| 874 | of bytes that were mapped.\r |
| 875 | DeviceAddress - The resulting map address for the bus master device to use \r |
| 876 | to access the hosts HostAddress. \r |
| 877 | Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| 878 | \r |
| 879 | Returns:\r |
| 880 | \r |
| 881 | EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.\r |
| 882 | EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.\r |
| 883 | EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.\r |
| 884 | EFI_DEVICE_ERROR - The system hardware could not map the requested address.\r |
| 885 | EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
| 886 | \r |
| 887 | --*/\r |
| 888 | {\r |
| 889 | EFI_STATUS Status;\r |
| 890 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 891 | ISA_MAP_INFO *IsaMapInfo;\r |
| 892 | UINT8 DmaMode;\r |
| 893 | UINTN MaxNumberOfBytes;\r |
| 894 | UINT32 BaseAddress;\r |
| 895 | UINT16 Count;\r |
| 896 | \r |
| 897 | UINT8 DmaMask;\r |
| 898 | UINT8 DmaClear;\r |
| 899 | UINT8 DmaChannelMode;\r |
| 900 | \r |
| 901 | if ((NULL == This) ||\r |
| 902 | (NULL == HostAddress) ||\r |
| 903 | (NULL == NumberOfBytes) ||\r |
| 904 | (NULL == DeviceAddress) ||\r |
| 905 | (NULL == Mapping)\r |
| 906 | ) {\r |
| 907 | return EFI_INVALID_PARAMETER;\r |
| 908 | }\r |
| 909 | \r |
| 910 | \r |
| 911 | //\r |
| 912 | // Initialize the return values to their defaults\r |
| 913 | //\r |
| 914 | *Mapping = NULL;\r |
| 915 | \r |
| 916 | //\r |
| 917 | // Make sure the Operation parameter is valid.\r |
| 918 | // Light IsaIo only supports two operations.\r |
| 919 | //\r |
| 920 | if (!(Operation == EfiIsaIoOperationSlaveRead || \r |
| 921 | Operation == EfiIsaIoOperationSlaveWrite)) {\r |
| 922 | return EFI_INVALID_PARAMETER;\r |
| 923 | }\r |
| 924 | \r |
| 925 | if (ChannelNumber >= 4) {\r |
| 926 | //\r |
| 927 | // The Light IsaIo doesn't support channelNumber larger than 4.\r |
| 928 | //\r |
| 929 | return EFI_INVALID_PARAMETER;\r |
| 930 | }\r |
| 931 | \r |
| 932 | //\r |
| 933 | // Map the HostAddress to a DeviceAddress.\r |
| 934 | //\r |
| 935 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
| 936 | if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
| 937 | //\r |
| 938 | // Common Buffer operations can not be remapped. If the common buffer\r |
| 939 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
| 940 | // an error.\r |
| 941 | //\r |
| 942 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
| 943 | return EFI_UNSUPPORTED;\r |
| 944 | }\r |
| 945 | //\r |
| 946 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
| 947 | // is called later.\r |
| 948 | //\r |
| 949 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
| 950 | if (IsaMapInfo == NULL) {\r |
| 951 | *NumberOfBytes = 0;\r |
| 952 | return EFI_OUT_OF_RESOURCES;\r |
| 953 | }\r |
| 954 | //\r |
| 955 | // Return a pointer to the MAP_INFO structure in Mapping\r |
| 956 | //\r |
| 957 | *Mapping = IsaMapInfo;\r |
| 958 | \r |
| 959 | //\r |
| 960 | // Initialize the MAP_INFO structure\r |
| 961 | //\r |
| 962 | IsaMapInfo->Operation = Operation;\r |
| 963 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
| 964 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
| 965 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
| 966 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
| 967 | \r |
| 968 | //\r |
| 969 | // Allocate a buffer below 16MB to map the transfer to.\r |
| 970 | //\r |
| 971 | Status = gBS->AllocatePages (\r |
| 972 | AllocateMaxAddress,\r |
| 973 | EfiBootServicesData,\r |
| 974 | IsaMapInfo->NumberOfPages,\r |
| 975 | &IsaMapInfo->MappedHostAddress\r |
| 976 | );\r |
| 977 | if (EFI_ERROR (Status)) {\r |
| 978 | gBS->FreePool (IsaMapInfo);\r |
| 979 | *NumberOfBytes = 0;\r |
| 980 | *Mapping = NULL;\r |
| 981 | return Status;\r |
| 982 | }\r |
| 983 | //\r |
| 984 | // If this is a read operation from the DMA agents's point of view,\r |
| 985 | // then copy the contents of the real buffer into the mapped buffer\r |
| 986 | // so the DMA agent can read the contents of the real buffer.\r |
| 987 | //\r |
| 988 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| 989 | CopyMem (\r |
| 990 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| 991 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| 992 | IsaMapInfo->NumberOfBytes\r |
| 993 | );\r |
| 994 | }\r |
| 995 | //\r |
| 996 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
| 997 | //\r |
| 998 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
| 999 | } else {\r |
| 1000 | //\r |
| 1001 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
| 1002 | // HostAddress\r |
| 1003 | //\r |
| 1004 | *DeviceAddress = PhysicalAddress;\r |
| 1005 | }\r |
| 1006 | \r |
| 1007 | //\r |
| 1008 | // Figure out what to program into the DMA Channel Mode Register\r |
| 1009 | //\r |
| 1010 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
| 1011 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| 1012 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
| 1013 | } else {\r |
| 1014 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
| 1015 | }\r |
| 1016 | //\r |
| 1017 | // We only support EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE in simplified IsaIo\r |
| 1018 | //\r |
| 1019 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
| 1020 | \r |
| 1021 | //\r |
| 1022 | // A Slave DMA transfer can not cross a 64K boundary.\r |
| 1023 | // Compute *NumberOfBytes based on this restriction.\r |
| 1024 | //\r |
| 1025 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
| 1026 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
| 1027 | *NumberOfBytes = MaxNumberOfBytes;\r |
| 1028 | }\r |
| 1029 | //\r |
| 1030 | // Compute the values to program into the BaseAddress and Count registers\r |
| 1031 | // of the Slave DMA controller\r |
| 1032 | //\r |
| 1033 | BaseAddress = (UINT32) (*DeviceAddress);\r |
| 1034 | Count = (UINT16) (*NumberOfBytes - 1);\r |
| 1035 | //\r |
| 1036 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
| 1037 | // Clear the DMA Byte Pointer Register\r |
| 1038 | //\r |
| 1039 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
| 1040 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
| 1041 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
| 1042 | \r |
| 1043 | Status = WritePort (\r |
| 1044 | This,\r |
| 1045 | DmaMask,\r |
| 1046 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| 1047 | );\r |
| 1048 | if (EFI_ERROR (Status)) {\r |
| 1049 | return Status;\r |
| 1050 | }\r |
| 1051 | \r |
| 1052 | Status = WritePort (\r |
| 1053 | This,\r |
| 1054 | DmaClear,\r |
| 1055 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| 1056 | );\r |
| 1057 | if (EFI_ERROR (Status)) {\r |
| 1058 | return Status;\r |
| 1059 | }\r |
| 1060 | \r |
| 1061 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
| 1062 | if (EFI_ERROR (Status)) {\r |
| 1063 | return Status;\r |
| 1064 | }\r |
| 1065 | \r |
| 1066 | Status = WriteDmaPort (\r |
| 1067 | This,\r |
| 1068 | DmaRegisters[ChannelNumber].Address,\r |
| 1069 | DmaRegisters[ChannelNumber].Page,\r |
| 1070 | DmaRegisters[ChannelNumber].Count,\r |
| 1071 | BaseAddress,\r |
| 1072 | Count\r |
| 1073 | );\r |
| 1074 | if (EFI_ERROR (Status)) {\r |
| 1075 | return Status;\r |
| 1076 | }\r |
| 1077 | \r |
| 1078 | Status = WritePort (\r |
| 1079 | This,\r |
| 1080 | DmaMask,\r |
| 1081 | (UINT8) (ChannelNumber & 0x03)\r |
| 1082 | );\r |
| 1083 | if (EFI_ERROR (Status)) {\r |
| 1084 | return Status;\r |
| 1085 | }\r |
| 1086 | \r |
| 1087 | return EFI_SUCCESS;\r |
| 1088 | }\r |
| 1089 | \r |
| 1090 | STATIC\r |
| 1091 | EFI_STATUS\r |
| 1092 | IsaIoMap_FullSupport (\r |
| 1093 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 1094 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| 1095 | IN UINT8 ChannelNumber OPTIONAL,\r |
| 1096 | IN UINT32 ChannelAttributes,\r |
| 1097 | IN VOID *HostAddress,\r |
| 1098 | IN OUT UINTN *NumberOfBytes,\r |
| 1099 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| 1100 | OUT VOID **Mapping\r |
| 1101 | )\r |
| 1102 | /*++\r |
| 1103 | \r |
| 1104 | Routine Description:\r |
| 1105 | \r |
| 1106 | Maps a memory region for DMA. This implementation implement the \r |
| 1107 | the full mapping support.\r |
| 1108 | \r |
| 1109 | Arguments:\r |
| 1110 | \r |
| 1111 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 1112 | Operation - Indicates the type of DMA (slave or bus master), and if \r |
| 1113 | the DMA operation is going to read or write to system memory. \r |
| 1114 | ChannelNumber - The slave channel number to use for this DMA operation. \r |
| 1115 | If Operation and ChannelAttributes shows that this device \r |
| 1116 | performs bus mastering DMA, then this field is ignored. \r |
| 1117 | The legal range for this field is 0..7. \r |
| 1118 | ChannelAttributes - The attributes of the DMA channel to use for this DMA operation\r |
| 1119 | HostAddress - The system memory address to map to the device. \r |
| 1120 | NumberOfBytes - On input the number of bytes to map. On output the number \r |
| 1121 | of bytes that were mapped.\r |
| 1122 | DeviceAddress - The resulting map address for the bus master device to use \r |
| 1123 | - to access the hosts HostAddress. \r |
| 1124 | Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| 1125 | \r |
| 1126 | Returns:\r |
| 1127 | \r |
| 1128 | EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.\r |
| 1129 | EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.\r |
| 1130 | EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.\r |
| 1131 | EFI_DEVICE_ERROR - The system hardware could not map the requested address.\r |
| 1132 | EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
| 1133 | \r |
| 1134 | --*/\r |
| 1135 | {\r |
| 1136 | EFI_STATUS Status;\r |
| 1137 | BOOLEAN Master;\r |
| 1138 | BOOLEAN Read;\r |
| 1139 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 1140 | ISA_MAP_INFO *IsaMapInfo;\r |
| 1141 | UINT8 DmaMode;\r |
| 1142 | UINTN MaxNumberOfBytes;\r |
| 1143 | UINT32 BaseAddress;\r |
| 1144 | UINT16 Count;\r |
| 1145 | \r |
| 1146 | UINT8 DmaMask;\r |
| 1147 | UINT8 DmaClear;\r |
| 1148 | UINT8 DmaChannelMode;\r |
| 1149 | \r |
| 1150 | if ((NULL == This) ||\r |
| 1151 | (NULL == HostAddress) ||\r |
| 1152 | (NULL == NumberOfBytes) ||\r |
| 1153 | (NULL == DeviceAddress) ||\r |
| 1154 | (NULL == Mapping)\r |
| 1155 | ) {\r |
| 1156 | return EFI_INVALID_PARAMETER;\r |
| 1157 | }\r |
| 1158 | \r |
| 1159 | \r |
| 1160 | //\r |
| 1161 | // Initialize the return values to their defaults\r |
| 1162 | //\r |
| 1163 | *Mapping = NULL;\r |
| 1164 | \r |
| 1165 | //\r |
| 1166 | // Make sure the Operation parameter is valid\r |
| 1167 | //\r |
| 1168 | if (Operation < 0 || Operation >= EfiIsaIoOperationMaximum) {\r |
| 1169 | return EFI_INVALID_PARAMETER;\r |
| 1170 | }\r |
| 1171 | //\r |
| 1172 | // See if this is a Slave DMA Operation\r |
| 1173 | //\r |
| 1174 | Master = TRUE;\r |
| 1175 | Read = FALSE;\r |
| 1176 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| 1177 | Operation = EfiIsaIoOperationBusMasterRead;\r |
| 1178 | Master = FALSE;\r |
| 1179 | Read = TRUE;\r |
| 1180 | }\r |
| 1181 | \r |
| 1182 | if (Operation == EfiIsaIoOperationSlaveWrite) {\r |
| 1183 | Operation = EfiIsaIoOperationBusMasterWrite;\r |
| 1184 | Master = FALSE;\r |
| 1185 | Read = FALSE;\r |
| 1186 | }\r |
| 1187 | \r |
| 1188 | if (!Master) {\r |
| 1189 | //\r |
| 1190 | // Make sure that ChannelNumber is a valid channel number\r |
| 1191 | // Channel 4 is used to cascade, so it is illegal.\r |
| 1192 | //\r |
| 1193 | if (ChannelNumber == 4 || ChannelNumber > 7) {\r |
| 1194 | return EFI_INVALID_PARAMETER;\r |
| 1195 | }\r |
| 1196 | //\r |
| 1197 | // This implementation only support COMPATIBLE DMA Transfers\r |
| 1198 | //\r |
| 1199 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE)) {\r |
| 1200 | return EFI_INVALID_PARAMETER;\r |
| 1201 | }\r |
| 1202 | \r |
| 1203 | if (ChannelAttributes &\r |
| 1204 | (\r |
| 1205 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A |\r |
| 1206 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B |\r |
| 1207 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C\r |
| 1208 | )\r |
| 1209 | ) {\r |
| 1210 | return EFI_INVALID_PARAMETER;\r |
| 1211 | }\r |
| 1212 | \r |
| 1213 | if (ChannelNumber < 4) {\r |
| 1214 | //\r |
| 1215 | // If this is Channel 0..3, then the width must be 8 bit\r |
| 1216 | //\r |
| 1217 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
| 1218 | (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16)\r |
| 1219 | ) {\r |
| 1220 | return EFI_INVALID_PARAMETER;\r |
| 1221 | }\r |
| 1222 | } else {\r |
| 1223 | //\r |
| 1224 | // If this is Channel 4..7, then the width must be 16 bit\r |
| 1225 | //\r |
| 1226 | if ((ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
| 1227 | (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16))\r |
| 1228 | ) {\r |
| 1229 | return EFI_INVALID_PARAMETER;\r |
| 1230 | }\r |
| 1231 | }\r |
| 1232 | //\r |
| 1233 | // Either Demand Mode or Single Mode must be selected, but not both\r |
| 1234 | //\r |
| 1235 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
| 1236 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
| 1237 | return EFI_INVALID_PARAMETER;\r |
| 1238 | }\r |
| 1239 | } else {\r |
| 1240 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE)) {\r |
| 1241 | return EFI_INVALID_PARAMETER;\r |
| 1242 | }\r |
| 1243 | }\r |
| 1244 | }\r |
| 1245 | //\r |
| 1246 | // Map the HostAddress to a DeviceAddress.\r |
| 1247 | //\r |
| 1248 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
| 1249 | if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
| 1250 | //\r |
| 1251 | // Common Buffer operations can not be remapped. If the common buffer\r |
| 1252 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
| 1253 | // an error.\r |
| 1254 | //\r |
| 1255 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
| 1256 | return EFI_UNSUPPORTED;\r |
| 1257 | }\r |
| 1258 | //\r |
| 1259 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
| 1260 | // is called later.\r |
| 1261 | //\r |
| 1262 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
| 1263 | if (IsaMapInfo == NULL) {\r |
| 1264 | *NumberOfBytes = 0;\r |
| 1265 | return EFI_OUT_OF_RESOURCES;\r |
| 1266 | }\r |
| 1267 | //\r |
| 1268 | // Return a pointer to the MAP_INFO structure in Mapping\r |
| 1269 | //\r |
| 1270 | *Mapping = IsaMapInfo;\r |
| 1271 | \r |
| 1272 | //\r |
| 1273 | // Initialize the MAP_INFO structure\r |
| 1274 | //\r |
| 1275 | IsaMapInfo->Operation = Operation;\r |
| 1276 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
| 1277 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
| 1278 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
| 1279 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
| 1280 | \r |
| 1281 | //\r |
| 1282 | // Allocate a buffer below 16MB to map the transfer to.\r |
| 1283 | //\r |
| 1284 | Status = gBS->AllocatePages (\r |
| 1285 | AllocateMaxAddress,\r |
| 1286 | EfiBootServicesData,\r |
| 1287 | IsaMapInfo->NumberOfPages,\r |
| 1288 | &IsaMapInfo->MappedHostAddress\r |
| 1289 | );\r |
| 1290 | if (EFI_ERROR (Status)) {\r |
| 1291 | gBS->FreePool (IsaMapInfo);\r |
| 1292 | *NumberOfBytes = 0;\r |
| 1293 | *Mapping = NULL;\r |
| 1294 | return Status;\r |
| 1295 | }\r |
| 1296 | //\r |
| 1297 | // If this is a read operation from the DMA agents's point of view,\r |
| 1298 | // then copy the contents of the real buffer into the mapped buffer\r |
| 1299 | // so the DMA agent can read the contents of the real buffer.\r |
| 1300 | //\r |
| 1301 | if (Operation == EfiIsaIoOperationBusMasterRead) {\r |
| 1302 | CopyMem (\r |
| 1303 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| 1304 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| 1305 | IsaMapInfo->NumberOfBytes\r |
| 1306 | );\r |
| 1307 | }\r |
| 1308 | //\r |
| 1309 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
| 1310 | //\r |
| 1311 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
| 1312 | } else {\r |
| 1313 | //\r |
| 1314 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
| 1315 | // HostAddress\r |
| 1316 | //\r |
| 1317 | *DeviceAddress = PhysicalAddress;\r |
| 1318 | }\r |
| 1319 | //\r |
| 1320 | // If this is a Bus Master operation then return\r |
| 1321 | //\r |
| 1322 | if (Master) {\r |
| 1323 | return EFI_SUCCESS;\r |
| 1324 | }\r |
| 1325 | //\r |
| 1326 | // Figure out what to program into the DMA Channel Mode Register\r |
| 1327 | //\r |
| 1328 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
| 1329 | if (Read) {\r |
| 1330 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
| 1331 | } else {\r |
| 1332 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
| 1333 | }\r |
| 1334 | \r |
| 1335 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE) {\r |
| 1336 | DmaMode |= B_8237_DMA_CHMODE_AE;\r |
| 1337 | }\r |
| 1338 | \r |
| 1339 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
| 1340 | DmaMode |= V_8237_DMA_CHMODE_DEMAND;\r |
| 1341 | }\r |
| 1342 | \r |
| 1343 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
| 1344 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
| 1345 | }\r |
| 1346 | //\r |
| 1347 | // A Slave DMA transfer can not cross a 64K boundary.\r |
| 1348 | // Compute *NumberOfBytes based on this restriction.\r |
| 1349 | //\r |
| 1350 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
| 1351 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
| 1352 | *NumberOfBytes = MaxNumberOfBytes;\r |
| 1353 | }\r |
| 1354 | //\r |
| 1355 | // Compute the values to program into the BaseAddress and Count registers\r |
| 1356 | // of the Slave DMA controller\r |
| 1357 | //\r |
| 1358 | if (ChannelNumber < 4) {\r |
| 1359 | BaseAddress = (UINT32) (*DeviceAddress);\r |
| 1360 | Count = (UINT16) (*NumberOfBytes - 1);\r |
| 1361 | } else {\r |
| 1362 | BaseAddress = (UINT32) (((UINT32) (*DeviceAddress) & 0xff0000) | (((UINT32) (*DeviceAddress) & 0xffff) >> 1));\r |
| 1363 | Count = (UINT16) ((*NumberOfBytes - 1) >> 1);\r |
| 1364 | }\r |
| 1365 | //\r |
| 1366 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
| 1367 | // Clear the DMA Byte Pointer Register\r |
| 1368 | //\r |
| 1369 | if (ChannelNumber < 4) {\r |
| 1370 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
| 1371 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
| 1372 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
| 1373 | } else {\r |
| 1374 | DmaMask = R_8237_DMA_WRSMSK_CH4_7;\r |
| 1375 | DmaClear = R_8237_DMA_CBPR_CH4_7;\r |
| 1376 | DmaChannelMode = R_8237_DMA_CHMODE_CH4_7;\r |
| 1377 | }\r |
| 1378 | \r |
| 1379 | Status = WritePort (\r |
| 1380 | This,\r |
| 1381 | DmaMask,\r |
| 1382 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| 1383 | );\r |
| 1384 | if (EFI_ERROR (Status)) {\r |
| 1385 | return Status;\r |
| 1386 | }\r |
| 1387 | \r |
| 1388 | Status = WritePort (\r |
| 1389 | This,\r |
| 1390 | DmaClear,\r |
| 1391 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| 1392 | );\r |
| 1393 | if (EFI_ERROR (Status)) {\r |
| 1394 | return Status;\r |
| 1395 | }\r |
| 1396 | \r |
| 1397 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
| 1398 | if (EFI_ERROR (Status)) {\r |
| 1399 | return Status;\r |
| 1400 | }\r |
| 1401 | \r |
| 1402 | Status = WriteDmaPort (\r |
| 1403 | This,\r |
| 1404 | DmaRegisters[ChannelNumber].Address,\r |
| 1405 | DmaRegisters[ChannelNumber].Page,\r |
| 1406 | DmaRegisters[ChannelNumber].Count,\r |
| 1407 | BaseAddress,\r |
| 1408 | Count\r |
| 1409 | );\r |
| 1410 | if (EFI_ERROR (Status)) {\r |
| 1411 | return Status;\r |
| 1412 | }\r |
| 1413 | \r |
| 1414 | Status = WritePort (\r |
| 1415 | This,\r |
| 1416 | DmaMask,\r |
| 1417 | (UINT8) (ChannelNumber & 0x03)\r |
| 1418 | );\r |
| 1419 | if (EFI_ERROR (Status)) {\r |
| 1420 | return Status;\r |
| 1421 | }\r |
| 1422 | \r |
| 1423 | return EFI_SUCCESS;\r |
| 1424 | }\r |
| 1425 | \r |
| 1426 | EFI_STATUS\r |
| 1427 | EFIAPI\r |
| 1428 | IsaIoMap (\r |
| 1429 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 1430 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| 1431 | IN UINT8 ChannelNumber OPTIONAL,\r |
| 1432 | IN UINT32 ChannelAttributes,\r |
| 1433 | IN VOID *HostAddress,\r |
| 1434 | IN OUT UINTN *NumberOfBytes,\r |
| 1435 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| 1436 | OUT VOID **Mapping\r |
| 1437 | )\r |
| 1438 | /*++\r |
| 1439 | \r |
| 1440 | Routine Description:\r |
| 1441 | \r |
| 1442 | Maps a memory region for DMA\r |
| 1443 | \r |
| 1444 | Arguments:\r |
| 1445 | \r |
| 1446 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 1447 | Operation - Indicates the type of DMA (slave or bus master), and if \r |
| 1448 | the DMA operation is going to read or write to system memory. \r |
| 1449 | ChannelNumber - The slave channel number to use for this DMA operation. \r |
| 1450 | If Operation and ChannelAttributes shows that this device \r |
| 1451 | performs bus mastering DMA, then this field is ignored. \r |
| 1452 | The legal range for this field is 0..7. \r |
| 1453 | ChannelAttributes - The attributes of the DMA channel to use for this DMA operation\r |
| 1454 | HostAddress - The system memory address to map to the device. \r |
| 1455 | NumberOfBytes - On input the number of bytes to map. On output the number \r |
| 1456 | of bytes that were mapped.\r |
| 1457 | DeviceAddress - The resulting map address for the bus master device to use \r |
| 1458 | - to access the hosts HostAddress. \r |
| 1459 | Mapping - A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| 1460 | \r |
| 1461 | Returns:\r |
| 1462 | \r |
| 1463 | EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.\r |
| 1464 | EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.\r |
| 1465 | EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.\r |
| 1466 | EFI_DEVICE_ERROR - The system hardware could not map the requested address.\r |
| 1467 | EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
| 1468 | \r |
| 1469 | --*/\r |
| 1470 | {\r |
| 1471 | //\r |
| 1472 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| 1473 | //\r |
| 1474 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
| 1475 | return EFI_UNSUPPORTED;\r |
| 1476 | }\r |
| 1477 | //\r |
| 1478 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
| 1479 | // ISA Bus Master.\r |
| 1480 | //\r |
| 1481 | // So we just return EFI_UNSUPPORTED for these functions.\r |
| 1482 | //\r |
| 1483 | if (FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| 1484 | return IsaIoMap_OnlySupportSlaveReadWrite (\r |
| 1485 | This,\r |
| 1486 | Operation,\r |
| 1487 | ChannelNumber,\r |
| 1488 | ChannelAttributes,\r |
| 1489 | HostAddress,\r |
| 1490 | NumberOfBytes,\r |
| 1491 | DeviceAddress,\r |
| 1492 | Mapping\r |
| 1493 | );\r |
| 1494 | \r |
| 1495 | } else {\r |
| 1496 | return IsaIoMap_FullSupport (\r |
| 1497 | This,\r |
| 1498 | Operation,\r |
| 1499 | ChannelNumber,\r |
| 1500 | ChannelAttributes,\r |
| 1501 | HostAddress,\r |
| 1502 | NumberOfBytes,\r |
| 1503 | DeviceAddress,\r |
| 1504 | Mapping\r |
| 1505 | );\r |
| 1506 | }\r |
| 1507 | }\r |
| 1508 | EFI_STATUS\r |
| 1509 | EFIAPI\r |
| 1510 | IsaIoAllocateBuffer (\r |
| 1511 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 1512 | IN EFI_ALLOCATE_TYPE Type,\r |
| 1513 | IN EFI_MEMORY_TYPE MemoryType,\r |
| 1514 | IN UINTN Pages,\r |
| 1515 | OUT VOID **HostAddress,\r |
| 1516 | IN UINT64 Attributes\r |
| 1517 | )\r |
| 1518 | /*++\r |
| 1519 | \r |
| 1520 | Routine Description:\r |
| 1521 | \r |
| 1522 | Allocates a common buffer for DMA\r |
| 1523 | \r |
| 1524 | Arguments:\r |
| 1525 | \r |
| 1526 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 1527 | Type - The type allocation to perform.\r |
| 1528 | MemoryType - The type of memory to allocate.\r |
| 1529 | Pages - The number of pages to allocate.\r |
| 1530 | HostAddress - A pointer to store the base address of the allocated range.\r |
| 1531 | Attributes - The requested bit mask of attributes for the allocated range.\r |
| 1532 | \r |
| 1533 | Returns:\r |
| 1534 | \r |
| 1535 | EFI_SUCCESS - The requested memory pages were allocated.\r |
| 1536 | EFI_INVALID_PARAMETER - Type is invalid or MemoryType is invalid or HostAddress is NULL\r |
| 1537 | EFI_UNSUPPORTED - Attributes is unsupported or the memory range specified \r |
| 1538 | by HostAddress, Pages, and Type is not available for common buffer use.\r |
| 1539 | EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
| 1540 | \r |
| 1541 | --*/\r |
| 1542 | {\r |
| 1543 | EFI_STATUS Status;\r |
| 1544 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 1545 | \r |
| 1546 | //\r |
| 1547 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
| 1548 | // ISA Bus Master.\r |
| 1549 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| 1550 | //\r |
| 1551 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| 1552 | return EFI_UNSUPPORTED;\r |
| 1553 | }\r |
| 1554 | \r |
| 1555 | if (HostAddress == NULL) {\r |
| 1556 | return EFI_INVALID_PARAMETER;\r |
| 1557 | }\r |
| 1558 | \r |
| 1559 | if (Type < AllocateAnyPages || Type >= MaxAllocateType) {\r |
| 1560 | return EFI_INVALID_PARAMETER;\r |
| 1561 | }\r |
| 1562 | //\r |
| 1563 | // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r |
| 1564 | //\r |
| 1565 | if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {\r |
| 1566 | return EFI_INVALID_PARAMETER;\r |
| 1567 | }\r |
| 1568 | \r |
| 1569 | if (Attributes &~(EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE | EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED)) {\r |
| 1570 | return EFI_UNSUPPORTED;\r |
| 1571 | }\r |
| 1572 | \r |
| 1573 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) (ISA_MAX_MEMORY_ADDRESS - 1);\r |
| 1574 | if (Type == AllocateAddress) {\r |
| 1575 | if ((UINTN) (*HostAddress) >= ISA_MAX_MEMORY_ADDRESS) {\r |
| 1576 | return EFI_UNSUPPORTED;\r |
| 1577 | } else {\r |
| 1578 | PhysicalAddress = (UINTN) (*HostAddress);\r |
| 1579 | }\r |
| 1580 | }\r |
| 1581 | \r |
| 1582 | if (Type == AllocateAnyPages) {\r |
| 1583 | Type = AllocateMaxAddress;\r |
| 1584 | }\r |
| 1585 | \r |
| 1586 | Status = gBS->AllocatePages (Type, MemoryType, Pages, &PhysicalAddress);\r |
| 1587 | if (EFI_ERROR (Status)) {\r |
| 1588 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 1589 | return Status;\r |
| 1590 | }\r |
| 1591 | \r |
| 1592 | *HostAddress = (VOID *) (UINTN) PhysicalAddress;\r |
| 1593 | return Status;\r |
| 1594 | }\r |
| 1595 | \r |
| 1596 | EFI_STATUS\r |
| 1597 | EFIAPI\r |
| 1598 | IsaIoFreeBuffer (\r |
| 1599 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| 1600 | IN UINTN Pages,\r |
| 1601 | IN VOID *HostAddress\r |
| 1602 | )\r |
| 1603 | /*++\r |
| 1604 | \r |
| 1605 | Routine Description:\r |
| 1606 | \r |
| 1607 | Frees a common buffer \r |
| 1608 | \r |
| 1609 | Arguments:\r |
| 1610 | \r |
| 1611 | This - A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| 1612 | Pages - The number of pages to free.\r |
| 1613 | HostAddress - The base address of the allocated range.\r |
| 1614 | \r |
| 1615 | Returns:\r |
| 1616 | \r |
| 1617 | EFI_SUCCESS - The requested memory pages were freed.\r |
| 1618 | EFI_INVALID_PARAMETER - The memory was not allocated with EFI_ISA_IO.AllocateBufer().\r |
| 1619 | \r |
| 1620 | --*/\r |
| 1621 | {\r |
| 1622 | EFI_STATUS Status;\r |
| 1623 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 1624 | \r |
| 1625 | //\r |
| 1626 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
| 1627 | // ISA Bus Master.\r |
| 1628 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| 1629 | //\r |
| 1630 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| 1631 | return EFI_UNSUPPORTED;\r |
| 1632 | }\r |
| 1633 | \r |
| 1634 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
| 1635 | Status = gBS->FreePages (\r |
| 1636 | PhysicalAddress,\r |
| 1637 | Pages\r |
| 1638 | );\r |
| 1639 | if (EFI_ERROR (Status)) {\r |
| 1640 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| 1641 | }\r |
| 1642 | \r |
| 1643 | return Status;\r |
| 1644 | }\r |
| 1645 | \r |
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