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