| | 1 | /**@file\r |
| | 2 | The implementation for EFI_ISA_IO_PROTOCOL. \r |
| | 3 | \r |
| | 4 | Copyright (c) 2006 - 2009, Intel Corporation.<BR>\r |
| | 5 | All rights reserved. This program and the accompanying materials\r |
| | 6 | are licensed and made available under the terms and conditions of the BSD License\r |
| | 7 | which accompanies this distribution. The full text of the license may be found at\r |
| | 8 | http://opensource.org/licenses/bsd-license.php\r |
| | 9 | \r |
| | 10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| | 11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| | 12 | \r |
| | 13 | **/\r |
| | 14 | \r |
| | 15 | #include "InternalIsaIo.h"\r |
| | 16 | \r |
| | 17 | //\r |
| | 18 | // Module Variables\r |
| | 19 | //\r |
| | 20 | EFI_ISA_IO_PROTOCOL mIsaIoInterface = {\r |
| | 21 | { \r |
| | 22 | IsaIoMemRead,\r |
| | 23 | IsaIoMemWrite\r |
| | 24 | },\r |
| | 25 | { \r |
| | 26 | IsaIoIoRead,\r |
| | 27 | IsaIoIoWrite\r |
| | 28 | },\r |
| | 29 | IsaIoCopyMem,\r |
| | 30 | IsaIoMap,\r |
| | 31 | IsaIoUnmap,\r |
| | 32 | IsaIoAllocateBuffer,\r |
| | 33 | IsaIoFreeBuffer,\r |
| | 34 | IsaIoFlush,\r |
| | 35 | NULL,\r |
| | 36 | 0,\r |
| | 37 | NULL\r |
| | 38 | };\r |
| | 39 | \r |
| | 40 | EFI_ISA_DMA_REGISTERS mDmaRegisters[8] = {\r |
| | 41 | {\r |
| | 42 | 0x00,\r |
| | 43 | 0x87,\r |
| | 44 | 0x01\r |
| | 45 | },\r |
| | 46 | {\r |
| | 47 | 0x02,\r |
| | 48 | 0x83,\r |
| | 49 | 0x03\r |
| | 50 | },\r |
| | 51 | {\r |
| | 52 | 0x04,\r |
| | 53 | 0x81,\r |
| | 54 | 0x05\r |
| | 55 | },\r |
| | 56 | {\r |
| | 57 | 0x06,\r |
| | 58 | 0x82,\r |
| | 59 | 0x07\r |
| | 60 | },\r |
| | 61 | {\r |
| | 62 | 0x00,\r |
| | 63 | 0x00,\r |
| | 64 | 0x00\r |
| | 65 | }, // Channel 4 is invalid\r |
| | 66 | {\r |
| | 67 | 0xC4,\r |
| | 68 | 0x8B,\r |
| | 69 | 0xC6\r |
| | 70 | },\r |
| | 71 | {\r |
| | 72 | 0xC8,\r |
| | 73 | 0x89,\r |
| | 74 | 0xCA\r |
| | 75 | },\r |
| | 76 | {\r |
| | 77 | 0xCC,\r |
| | 78 | 0x8A,\r |
| | 79 | 0xCE\r |
| | 80 | },\r |
| | 81 | };\r |
| | 82 | \r |
| | 83 | /**\r |
| | 84 | report a error Status code\r |
| | 85 | \r |
| | 86 | @param Code The error status code.\r |
| | 87 | \r |
| | 88 | @return EFI_SUCCESS Success to report status code.\r |
| | 89 | **/\r |
| | 90 | EFI_STATUS\r |
| | 91 | ReportErrorStatusCode (\r |
| | 92 | EFI_STATUS_CODE_VALUE Code\r |
| | 93 | )\r |
| | 94 | {\r |
| | 95 | return REPORT_STATUS_CODE (\r |
| | 96 | EFI_ERROR_CODE | EFI_ERROR_MINOR,\r |
| | 97 | Code\r |
| | 98 | );\r |
| | 99 | }\r |
| | 100 | \r |
| | 101 | /**\r |
| | 102 | Initializes an ISA I/O Instance\r |
| | 103 | \r |
| | 104 | @param[in] IsaIoDevice The iso device to be initialized.\r |
| | 105 | @param[in] IsaDeviceResourceList The resource list.\r |
| | 106 | \r |
| | 107 | @retval None\r |
| | 108 | **/\r |
| | 109 | VOID\r |
| | 110 | InitializeIsaIoInstance (\r |
| | 111 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
| | 112 | IN EFI_ISA_ACPI_RESOURCE_LIST *IsaDeviceResourceList\r |
| | 113 | )\r |
| | 114 | {\r |
| | 115 | //\r |
| | 116 | // Use the ISA IO Protocol structure template to initialize the ISA IO instance\r |
| | 117 | //\r |
| | 118 | CopyMem (\r |
| | 119 | &IsaIoDevice->IsaIo,\r |
| | 120 | &mIsaIoInterface,\r |
| | 121 | sizeof (EFI_ISA_IO_PROTOCOL)\r |
| | 122 | );\r |
| | 123 | \r |
| | 124 | IsaIoDevice->IsaIo.ResourceList = IsaDeviceResourceList;\r |
| | 125 | }\r |
| | 126 | \r |
| | 127 | /**\r |
| | 128 | Performs an ISA I/O Read Cycle\r |
| | 129 | \r |
| | 130 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 131 | @param[in] Width Specifies the width of the I/O operation.\r |
| | 132 | @param[in] Offset The offset in ISA I/O space to start the I/O operation. \r |
| | 133 | @param[in] Count The number of I/O operations to perform. \r |
| | 134 | @param[out] Buffer The destination buffer to store the results\r |
| | 135 | \r |
| | 136 | @retval EFI_SUCCESS The data was read from the device sucessfully.\r |
| | 137 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
| | 138 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
| | 139 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 140 | **/\r |
| | 141 | EFI_STATUS\r |
| | 142 | EFIAPI\r |
| | 143 | IsaIoIoRead (\r |
| | 144 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 145 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 146 | IN UINT32 Offset,\r |
| | 147 | IN UINTN Count,\r |
| | 148 | OUT VOID *Buffer\r |
| | 149 | )\r |
| | 150 | {\r |
| | 151 | EFI_STATUS Status;\r |
| | 152 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 153 | \r |
| | 154 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 155 | \r |
| | 156 | //\r |
| | 157 | // Verify Isa IO Access\r |
| | 158 | //\r |
| | 159 | Status = IsaIoVerifyAccess (\r |
| | 160 | IsaIoDevice,\r |
| | 161 | IsaAccessTypeIo,\r |
| | 162 | Width,\r |
| | 163 | Count,\r |
| | 164 | Offset\r |
| | 165 | );\r |
| | 166 | if (EFI_ERROR (Status)) {\r |
| | 167 | return Status;\r |
| | 168 | }\r |
| | 169 | \r |
| | 170 | Status = IsaIoDevice->PciIo->Io.Read (\r |
| | 171 | IsaIoDevice->PciIo,\r |
| | 172 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| | 173 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 174 | Offset,\r |
| | 175 | Count,\r |
| | 176 | Buffer\r |
| | 177 | );\r |
| | 178 | \r |
| | 179 | if (EFI_ERROR (Status)) {\r |
| | 180 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 181 | }\r |
| | 182 | \r |
| | 183 | return Status;\r |
| | 184 | }\r |
| | 185 | \r |
| | 186 | /**\r |
| | 187 | Performs an ISA I/O Write Cycle\r |
| | 188 | \r |
| | 189 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 190 | @param[in] Width Specifies the width of the I/O operation.\r |
| | 191 | @param[in] Offset The offset in ISA I/O space to start the I/O operation. \r |
| | 192 | @param[in] Count The number of I/O operations to perform. \r |
| | 193 | @param[in] Buffer The source buffer to write data from\r |
| | 194 | \r |
| | 195 | @retval EFI_SUCCESS The data was writen to the device sucessfully.\r |
| | 196 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
| | 197 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
| | 198 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 199 | **/\r |
| | 200 | EFI_STATUS\r |
| | 201 | EFIAPI\r |
| | 202 | IsaIoIoWrite (\r |
| | 203 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 204 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 205 | IN UINT32 Offset,\r |
| | 206 | IN UINTN Count,\r |
| | 207 | IN VOID *Buffer\r |
| | 208 | )\r |
| | 209 | {\r |
| | 210 | EFI_STATUS Status;\r |
| | 211 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 212 | \r |
| | 213 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 214 | \r |
| | 215 | //\r |
| | 216 | // Verify Isa IO Access\r |
| | 217 | //\r |
| | 218 | Status = IsaIoVerifyAccess (\r |
| | 219 | IsaIoDevice,\r |
| | 220 | IsaAccessTypeIo,\r |
| | 221 | Width,\r |
| | 222 | Count,\r |
| | 223 | Offset\r |
| | 224 | );\r |
| | 225 | if (EFI_ERROR (Status)) {\r |
| | 226 | return Status;\r |
| | 227 | }\r |
| | 228 | \r |
| | 229 | Status = IsaIoDevice->PciIo->Io.Write (\r |
| | 230 | IsaIoDevice->PciIo,\r |
| | 231 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| | 232 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 233 | Offset,\r |
| | 234 | Count,\r |
| | 235 | Buffer\r |
| | 236 | );\r |
| | 237 | \r |
| | 238 | if (EFI_ERROR (Status)) {\r |
| | 239 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 240 | }\r |
| | 241 | \r |
| | 242 | return Status;\r |
| | 243 | }\r |
| | 244 | \r |
| | 245 | /**\r |
| | 246 | Writes an 8-bit I/O Port\r |
| | 247 | \r |
| | 248 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 249 | @param[in] Offset The offset in ISA IO space to start the IO operation. \r |
| | 250 | @param[in] Value The data to write port.\r |
| | 251 | \r |
| | 252 | @retval EFI_SUCCESS Success.\r |
| | 253 | @retval EFI_INVALID_PARAMETER Parameter is invalid.\r |
| | 254 | @retval EFI_UNSUPPORTED The address range specified by Offset is not valid.\r |
| | 255 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 256 | **/\r |
| | 257 | EFI_STATUS\r |
| | 258 | WritePort (\r |
| | 259 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 260 | IN UINT32 Offset,\r |
| | 261 | IN UINT8 Value\r |
| | 262 | )\r |
| | 263 | {\r |
| | 264 | EFI_STATUS Status;\r |
| | 265 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 266 | \r |
| | 267 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 268 | \r |
| | 269 | Status = IsaIoDevice->PciIo->Io.Write (\r |
| | 270 | IsaIoDevice->PciIo,\r |
| | 271 | EfiPciIoWidthUint8,\r |
| | 272 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 273 | Offset,\r |
| | 274 | 1,\r |
| | 275 | &Value\r |
| | 276 | );\r |
| | 277 | if (EFI_ERROR (Status)) {\r |
| | 278 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 279 | return Status;\r |
| | 280 | }\r |
| | 281 | \r |
| | 282 | gBS->Stall (50);\r |
| | 283 | \r |
| | 284 | return EFI_SUCCESS;\r |
| | 285 | }\r |
| | 286 | \r |
| | 287 | /**\r |
| | 288 | Writes I/O operation base address and count number to a 8 bit I/O Port.\r |
| | 289 | \r |
| | 290 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 291 | @param[in] AddrOffset The address' offset.\r |
| | 292 | @param[in] PageOffset The page's offest.\r |
| | 293 | @param[in] CountOffset The count's offset.\r |
| | 294 | @param[in] BaseAddress The base address.\r |
| | 295 | @param[in] Count The number of I/O operations to perform. \r |
| | 296 | \r |
| | 297 | @retval EFI_SUCCESS Success.\r |
| | 298 | @retval EFI_INVALID_PARAMETER Parameter is invalid.\r |
| | 299 | @retval EFI_UNSUPPORTED The address range specified by these Offsets and Count is not valid.\r |
| | 300 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 301 | **/\r |
| | 302 | EFI_STATUS\r |
| | 303 | WriteDmaPort (\r |
| | 304 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 305 | IN UINT32 AddrOffset,\r |
| | 306 | IN UINT32 PageOffset,\r |
| | 307 | IN UINT32 CountOffset,\r |
| | 308 | IN UINT32 BaseAddress,\r |
| | 309 | IN UINT16 Count\r |
| | 310 | )\r |
| | 311 | {\r |
| | 312 | EFI_STATUS Status;\r |
| | 313 | \r |
| | 314 | Status = WritePort (This, AddrOffset, (UINT8) (BaseAddress & 0xff));\r |
| | 315 | if (EFI_ERROR (Status)) {\r |
| | 316 | return Status;\r |
| | 317 | }\r |
| | 318 | \r |
| | 319 | Status = WritePort (This, AddrOffset, (UINT8) ((BaseAddress >> 8) & 0xff));\r |
| | 320 | if (EFI_ERROR (Status)) {\r |
| | 321 | return Status;\r |
| | 322 | }\r |
| | 323 | \r |
| | 324 | Status = WritePort (This, PageOffset, (UINT8) ((BaseAddress >> 16) & 0xff));\r |
| | 325 | if (EFI_ERROR (Status)) {\r |
| | 326 | return Status;\r |
| | 327 | }\r |
| | 328 | \r |
| | 329 | Status = WritePort (This, CountOffset, (UINT8) (Count & 0xff));\r |
| | 330 | if (EFI_ERROR (Status)) {\r |
| | 331 | return Status;\r |
| | 332 | }\r |
| | 333 | \r |
| | 334 | Status = WritePort (This, CountOffset, (UINT8) ((Count >> 8) & 0xff));\r |
| | 335 | return Status;\r |
| | 336 | }\r |
| | 337 | \r |
| | 338 | /**\r |
| | 339 | Unmaps a memory region for DMA\r |
| | 340 | \r |
| | 341 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 342 | @param[in] Mapping The mapping value returned from EFI_ISA_IO.Map().\r |
| | 343 | \r |
| | 344 | @retval EFI_SUCCESS The range was unmapped.\r |
| | 345 | @retval EFI_DEVICE_ERROR The data was not committed to the target system memory.\r |
| | 346 | **/\r |
| | 347 | EFI_STATUS\r |
| | 348 | EFIAPI\r |
| | 349 | IsaIoUnmap (\r |
| | 350 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 351 | IN VOID *Mapping\r |
| | 352 | )\r |
| | 353 | {\r |
| | 354 | ISA_MAP_INFO *IsaMapInfo;\r |
| | 355 | \r |
| | 356 | //\r |
| | 357 | // Unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| | 358 | //\r |
| | 359 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
| | 360 | return EFI_UNSUPPORTED;\r |
| | 361 | }\r |
| | 362 | \r |
| | 363 | //\r |
| | 364 | // See if the Map() operation associated with this Unmap() required a mapping\r |
| | 365 | // buffer.If a mapping buffer was not required, then this function simply\r |
| | 366 | // returns EFI_SUCCESS.\r |
| | 367 | //\r |
| | 368 | if (Mapping != NULL) {\r |
| | 369 | //\r |
| | 370 | // Get the MAP_INFO structure from Mapping\r |
| | 371 | //\r |
| | 372 | IsaMapInfo = (ISA_MAP_INFO *) Mapping;\r |
| | 373 | \r |
| | 374 | //\r |
| | 375 | // If this is a write operation from the Agent's point of view,\r |
| | 376 | // then copy the contents of the mapped buffer into the real buffer\r |
| | 377 | // so the processor can read the contents of the real buffer.\r |
| | 378 | //\r |
| | 379 | if (IsaMapInfo->Operation == EfiIsaIoOperationBusMasterWrite) {\r |
| | 380 | CopyMem (\r |
| | 381 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| | 382 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| | 383 | IsaMapInfo->NumberOfBytes\r |
| | 384 | );\r |
| | 385 | }\r |
| | 386 | //\r |
| | 387 | // Free the mapped buffer and the MAP_INFO structure.\r |
| | 388 | //\r |
| | 389 | gBS->FreePages (IsaMapInfo->MappedHostAddress, IsaMapInfo->NumberOfPages);\r |
| | 390 | FreePool (IsaMapInfo);\r |
| | 391 | }\r |
| | 392 | \r |
| | 393 | return EFI_SUCCESS;\r |
| | 394 | }\r |
| | 395 | \r |
| | 396 | /**\r |
| | 397 | Flushes any posted write data to the system memory.\r |
| | 398 | \r |
| | 399 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 400 | \r |
| | 401 | @retval EFI_SUCCESS The buffers were flushed.\r |
| | 402 | @retval EFI_DEVICE_ERROR The buffers were not flushed due to a hardware error.\r |
| | 403 | **/\r |
| | 404 | EFI_STATUS\r |
| | 405 | EFIAPI\r |
| | 406 | IsaIoFlush (\r |
| | 407 | IN EFI_ISA_IO_PROTOCOL *This\r |
| | 408 | )\r |
| | 409 | {\r |
| | 410 | EFI_STATUS Status;\r |
| | 411 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 412 | \r |
| | 413 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 414 | \r |
| | 415 | Status = IsaIoDevice->PciIo->Flush (IsaIoDevice->PciIo);\r |
| | 416 | \r |
| | 417 | if (EFI_ERROR (Status)) {\r |
| | 418 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 419 | }\r |
| | 420 | \r |
| | 421 | return Status;\r |
| | 422 | }\r |
| | 423 | \r |
| | 424 | /**\r |
| | 425 | Verifies access to an ISA device\r |
| | 426 | \r |
| | 427 | @param[in] IsaIoDevice The ISA device to be verified.\r |
| | 428 | @param[in] Type The Access type. The input must be either IsaAccessTypeMem or IsaAccessTypeIo.\r |
| | 429 | @param[in] Width The width of the memory operation.\r |
| | 430 | @param[in] Count The number of memory operations to perform. \r |
| | 431 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
| | 432 | \r |
| | 433 | @retval EFI_SUCCESS Verify success.\r |
| | 434 | @retval EFI_INVALID_PARAMETER One of the parameters has an invalid value.\r |
| | 435 | @retval EFI_UNSUPPORTED The device ont support the access type.\r |
| | 436 | **/\r |
| | 437 | EFI_STATUS\r |
| | 438 | IsaIoVerifyAccess (\r |
| | 439 | IN ISA_IO_DEVICE *IsaIoDevice,\r |
| | 440 | IN ISA_ACCESS_TYPE Type,\r |
| | 441 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 442 | IN UINTN Count,\r |
| | 443 | IN UINT32 Offset\r |
| | 444 | )\r |
| | 445 | {\r |
| | 446 | EFI_ISA_ACPI_RESOURCE *Item;\r |
| | 447 | EFI_STATUS Status;\r |
| | 448 | \r |
| | 449 | if (Width < EfiIsaIoWidthUint8 ||\r |
| | 450 | Width >= EfiIsaIoWidthMaximum ||\r |
| | 451 | Width == EfiIsaIoWidthReserved ||\r |
| | 452 | Width == EfiIsaIoWidthFifoReserved ||\r |
| | 453 | Width == EfiIsaIoWidthFillReserved\r |
| | 454 | ) {\r |
| | 455 | return EFI_INVALID_PARAMETER;\r |
| | 456 | }\r |
| | 457 | \r |
| | 458 | //\r |
| | 459 | // If Width is EfiIsaIoWidthFifoUintX then convert to EfiIsaIoWidthUintX\r |
| | 460 | // If Width is EfiIsaIoWidthFillUintX then convert to EfiIsaIoWidthUintX\r |
| | 461 | //\r |
| | 462 | if (Width >= EfiIsaIoWidthFifoUint8 && Width < EfiIsaIoWidthFifoReserved) {\r |
| | 463 | Count = 1;\r |
| | 464 | }\r |
| | 465 | \r |
| | 466 | Width = (EFI_ISA_IO_PROTOCOL_WIDTH) (Width & 0x03);\r |
| | 467 | \r |
| | 468 | Status = EFI_UNSUPPORTED;\r |
| | 469 | Item = IsaIoDevice->IsaIo.ResourceList->ResourceItem;\r |
| | 470 | while (Item->Type != EfiIsaAcpiResourceEndOfList) {\r |
| | 471 | if ((Type == IsaAccessTypeMem && Item->Type == EfiIsaAcpiResourceMemory) ||\r |
| | 472 | (Type == IsaAccessTypeIo && Item->Type == EfiIsaAcpiResourceIo)) {\r |
| | 473 | if (Offset >= Item->StartRange && (Offset + Count * (UINT32)(1 << Width)) - 1 <= Item->EndRange) {\r |
| | 474 | return EFI_SUCCESS;\r |
| | 475 | }\r |
| | 476 | \r |
| | 477 | if (Offset >= Item->StartRange && Offset <= Item->EndRange) {\r |
| | 478 | Status = EFI_INVALID_PARAMETER;\r |
| | 479 | }\r |
| | 480 | }\r |
| | 481 | \r |
| | 482 | Item++;\r |
| | 483 | }\r |
| | 484 | \r |
| | 485 | return Status;\r |
| | 486 | }\r |
| | 487 | \r |
| | 488 | /**\r |
| | 489 | Performs an ISA Memory Read Cycle\r |
| | 490 | \r |
| | 491 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 492 | @param[in] Width Specifies the width of the memory operation.\r |
| | 493 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
| | 494 | @param[in] Count The number of memory operations to perform. \r |
| | 495 | @param[out] Buffer The destination buffer to store the results\r |
| | 496 | \r |
| | 497 | @retval EFI_SUCCESS The data was read from the device successfully.\r |
| | 498 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
| | 499 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
| | 500 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 501 | **/\r |
| | 502 | EFI_STATUS\r |
| | 503 | EFIAPI\r |
| | 504 | IsaIoMemRead (\r |
| | 505 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 506 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 507 | IN UINT32 Offset,\r |
| | 508 | IN UINTN Count,\r |
| | 509 | OUT VOID *Buffer\r |
| | 510 | )\r |
| | 511 | {\r |
| | 512 | EFI_STATUS Status;\r |
| | 513 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 514 | \r |
| | 515 | //\r |
| | 516 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
| | 517 | // ISA bus memory read/write operations.\r |
| | 518 | //\r |
| | 519 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| | 520 | return EFI_UNSUPPORTED;\r |
| | 521 | }\r |
| | 522 | \r |
| | 523 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 524 | \r |
| | 525 | //\r |
| | 526 | // Verify the Isa Io Access\r |
| | 527 | //\r |
| | 528 | Status = IsaIoVerifyAccess (\r |
| | 529 | IsaIoDevice,\r |
| | 530 | IsaAccessTypeMem,\r |
| | 531 | Width,\r |
| | 532 | Count,\r |
| | 533 | Offset\r |
| | 534 | );\r |
| | 535 | if (EFI_ERROR (Status)) {\r |
| | 536 | return Status;\r |
| | 537 | }\r |
| | 538 | \r |
| | 539 | Status = IsaIoDevice->PciIo->Mem.Read (\r |
| | 540 | IsaIoDevice->PciIo,\r |
| | 541 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| | 542 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 543 | Offset,\r |
| | 544 | Count,\r |
| | 545 | Buffer\r |
| | 546 | );\r |
| | 547 | \r |
| | 548 | if (EFI_ERROR (Status)) {\r |
| | 549 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 550 | }\r |
| | 551 | \r |
| | 552 | return Status;\r |
| | 553 | }\r |
| | 554 | \r |
| | 555 | /**\r |
| | 556 | Performs an ISA Memory Write Cycle\r |
| | 557 | \r |
| | 558 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance. \r |
| | 559 | @param[in] Width Specifies the width of the memory operation.\r |
| | 560 | @param[in] Offset The offset in ISA memory space to start the memory operation. \r |
| | 561 | @param[in] Count The number of memory operations to perform. \r |
| | 562 | @param[in] Buffer The source buffer to write data from\r |
| | 563 | \r |
| | 564 | @retval EFI_SUCCESS The data was written to the device sucessfully.\r |
| | 565 | @retval EFI_UNSUPPORTED The Offset is not valid for this device.\r |
| | 566 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
| | 567 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 568 | **/\r |
| | 569 | EFI_STATUS\r |
| | 570 | EFIAPI\r |
| | 571 | IsaIoMemWrite (\r |
| | 572 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 573 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 574 | IN UINT32 Offset,\r |
| | 575 | IN UINTN Count,\r |
| | 576 | IN VOID *Buffer\r |
| | 577 | )\r |
| | 578 | {\r |
| | 579 | EFI_STATUS Status;\r |
| | 580 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 581 | \r |
| | 582 | //\r |
| | 583 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
| | 584 | // ISA bus memory read/write operations.\r |
| | 585 | //\r |
| | 586 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| | 587 | return EFI_UNSUPPORTED;\r |
| | 588 | }\r |
| | 589 | \r |
| | 590 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 591 | \r |
| | 592 | //\r |
| | 593 | // Verify Isa IO Access\r |
| | 594 | //\r |
| | 595 | Status = IsaIoVerifyAccess (\r |
| | 596 | IsaIoDevice,\r |
| | 597 | IsaAccessTypeMem,\r |
| | 598 | Width,\r |
| | 599 | Count,\r |
| | 600 | Offset\r |
| | 601 | );\r |
| | 602 | if (EFI_ERROR (Status)) {\r |
| | 603 | return Status;\r |
| | 604 | }\r |
| | 605 | \r |
| | 606 | Status = IsaIoDevice->PciIo->Mem.Write (\r |
| | 607 | IsaIoDevice->PciIo,\r |
| | 608 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| | 609 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 610 | Offset,\r |
| | 611 | Count,\r |
| | 612 | Buffer\r |
| | 613 | );\r |
| | 614 | \r |
| | 615 | if (EFI_ERROR (Status)) {\r |
| | 616 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 617 | }\r |
| | 618 | \r |
| | 619 | return Status;\r |
| | 620 | }\r |
| | 621 | \r |
| | 622 | /**\r |
| | 623 | Copy one region of ISA memory space to another region of ISA memory space on the ISA controller.\r |
| | 624 | \r |
| | 625 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 626 | @param[in] Width Specifies the width of the memory copy operation.\r |
| | 627 | @param[out] DestOffset The offset of the destination \r |
| | 628 | @param[in] SrcOffset The offset of the source\r |
| | 629 | @param[in] Count The number of memory copy operations to perform\r |
| | 630 | \r |
| | 631 | @retval EFI_SUCCESS The data was copied sucessfully.\r |
| | 632 | @retval EFI_UNSUPPORTED The DestOffset or SrcOffset is not valid for this device.\r |
| | 633 | @retval EFI_INVALID_PARAMETER Width or Count, or both, were invalid.\r |
| | 634 | @retval EFI_OUT_OF_RESOURCES The request could not be completed due to a lack of resources.\r |
| | 635 | **/\r |
| | 636 | EFI_STATUS\r |
| | 637 | EFIAPI\r |
| | 638 | IsaIoCopyMem (\r |
| | 639 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 640 | IN EFI_ISA_IO_PROTOCOL_WIDTH Width,\r |
| | 641 | IN UINT32 DestOffset,\r |
| | 642 | IN UINT32 SrcOffset,\r |
| | 643 | IN UINTN Count\r |
| | 644 | )\r |
| | 645 | {\r |
| | 646 | EFI_STATUS Status;\r |
| | 647 | ISA_IO_DEVICE *IsaIoDevice;\r |
| | 648 | \r |
| | 649 | //\r |
| | 650 | // Set Feature Flag PcdIsaBusSupportIsaMemory to FALSE to disable support for\r |
| | 651 | // ISA bus memory read/write operations.\r |
| | 652 | //\r |
| | 653 | if (!FeaturePcdGet (PcdIsaBusSupportIsaMemory)) {\r |
| | 654 | return EFI_UNSUPPORTED;\r |
| | 655 | }\r |
| | 656 | \r |
| | 657 | IsaIoDevice = ISA_IO_DEVICE_FROM_ISA_IO_THIS (This);\r |
| | 658 | \r |
| | 659 | //\r |
| | 660 | // Verify Isa IO Access for destination and source\r |
| | 661 | //\r |
| | 662 | Status = IsaIoVerifyAccess (\r |
| | 663 | IsaIoDevice,\r |
| | 664 | IsaAccessTypeMem,\r |
| | 665 | Width,\r |
| | 666 | Count,\r |
| | 667 | DestOffset\r |
| | 668 | );\r |
| | 669 | if (EFI_ERROR (Status)) {\r |
| | 670 | return Status;\r |
| | 671 | }\r |
| | 672 | \r |
| | 673 | Status = IsaIoVerifyAccess (\r |
| | 674 | IsaIoDevice,\r |
| | 675 | IsaAccessTypeMem,\r |
| | 676 | Width,\r |
| | 677 | Count,\r |
| | 678 | SrcOffset\r |
| | 679 | );\r |
| | 680 | if (EFI_ERROR (Status)) {\r |
| | 681 | return Status;\r |
| | 682 | }\r |
| | 683 | \r |
| | 684 | Status = IsaIoDevice->PciIo->CopyMem (\r |
| | 685 | IsaIoDevice->PciIo,\r |
| | 686 | (EFI_PCI_IO_PROTOCOL_WIDTH) Width,\r |
| | 687 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 688 | DestOffset,\r |
| | 689 | EFI_PCI_IO_PASS_THROUGH_BAR,\r |
| | 690 | SrcOffset,\r |
| | 691 | Count\r |
| | 692 | );\r |
| | 693 | \r |
| | 694 | if (EFI_ERROR (Status)) {\r |
| | 695 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 696 | }\r |
| | 697 | \r |
| | 698 | return Status;\r |
| | 699 | }\r |
| | 700 | \r |
| | 701 | /**\r |
| | 702 | Maps a memory region for DMA, note this implementation\r |
| | 703 | only supports slave read/write operation to save code size.\r |
| | 704 | \r |
| | 705 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 706 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
| | 707 | the DMA operation is going to read or write to system memory. \r |
| | 708 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
| | 709 | If Operation and ChannelAttributes shows that this device \r |
| | 710 | performs bus mastering DMA, then this field is ignored. \r |
| | 711 | The legal range for this field is 0..7. \r |
| | 712 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
| | 713 | @param HostAddress The system memory address to map to the device. \r |
| | 714 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
| | 715 | of bytes that were mapped.\r |
| | 716 | @param DeviceAddress The resulting map address for the bus master device to use \r |
| | 717 | to access the hosts HostAddress. \r |
| | 718 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| | 719 | \r |
| | 720 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r |
| | 721 | @retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.\r |
| | 722 | @retval EFI_UNSUPPORTED The HostAddress can not be mapped as a common buffer.\r |
| | 723 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r |
| | 724 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
| | 725 | **/\r |
| | 726 | EFI_STATUS\r |
| | 727 | IsaIoMapOnlySupportSlaveReadWrite (\r |
| | 728 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 729 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| | 730 | IN UINT8 ChannelNumber OPTIONAL,\r |
| | 731 | IN UINT32 ChannelAttributes,\r |
| | 732 | IN VOID *HostAddress,\r |
| | 733 | IN OUT UINTN *NumberOfBytes,\r |
| | 734 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| | 735 | OUT VOID **Mapping\r |
| | 736 | )\r |
| | 737 | {\r |
| | 738 | EFI_STATUS Status;\r |
| | 739 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| | 740 | ISA_MAP_INFO *IsaMapInfo;\r |
| | 741 | UINT8 DmaMode;\r |
| | 742 | UINTN MaxNumberOfBytes;\r |
| | 743 | UINT32 BaseAddress;\r |
| | 744 | UINT16 Count;\r |
| | 745 | UINT8 DmaMask;\r |
| | 746 | UINT8 DmaClear;\r |
| | 747 | UINT8 DmaChannelMode;\r |
| | 748 | \r |
| | 749 | if ((NULL == This) ||\r |
| | 750 | (NULL == HostAddress) ||\r |
| | 751 | (NULL == NumberOfBytes) ||\r |
| | 752 | (NULL == DeviceAddress) ||\r |
| | 753 | (NULL == Mapping)\r |
| | 754 | ) {\r |
| | 755 | return EFI_INVALID_PARAMETER;\r |
| | 756 | }\r |
| | 757 | \r |
| | 758 | //\r |
| | 759 | // Initialize the return values to their defaults\r |
| | 760 | //\r |
| | 761 | *Mapping = NULL;\r |
| | 762 | \r |
| | 763 | //\r |
| | 764 | // Make sure the Operation parameter is valid.\r |
| | 765 | // Light IsaIo only supports two operations.\r |
| | 766 | //\r |
| | 767 | if (!(Operation == EfiIsaIoOperationSlaveRead || \r |
| | 768 | Operation == EfiIsaIoOperationSlaveWrite)) {\r |
| | 769 | return EFI_INVALID_PARAMETER;\r |
| | 770 | }\r |
| | 771 | \r |
| | 772 | if (ChannelNumber >= 4) {\r |
| | 773 | //\r |
| | 774 | // The Light IsaIo doesn't support channelNumber larger than 4.\r |
| | 775 | //\r |
| | 776 | return EFI_INVALID_PARAMETER;\r |
| | 777 | }\r |
| | 778 | \r |
| | 779 | //\r |
| | 780 | // Map the HostAddress to a DeviceAddress.\r |
| | 781 | //\r |
| | 782 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
| | 783 | if ((PhysicalAddress + *NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
| | 784 | //\r |
| | 785 | // Common Buffer operations can not be remapped. If the common buffer\r |
| | 786 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
| | 787 | // an error.\r |
| | 788 | //\r |
| | 789 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
| | 790 | return EFI_UNSUPPORTED;\r |
| | 791 | }\r |
| | 792 | //\r |
| | 793 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
| | 794 | // is called later.\r |
| | 795 | //\r |
| | 796 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
| | 797 | if (IsaMapInfo == NULL) {\r |
| | 798 | *NumberOfBytes = 0;\r |
| | 799 | return EFI_OUT_OF_RESOURCES;\r |
| | 800 | }\r |
| | 801 | //\r |
| | 802 | // Return a pointer to the MAP_INFO structure in Mapping\r |
| | 803 | //\r |
| | 804 | *Mapping = IsaMapInfo;\r |
| | 805 | \r |
| | 806 | //\r |
| | 807 | // Initialize the MAP_INFO structure\r |
| | 808 | //\r |
| | 809 | IsaMapInfo->Operation = Operation;\r |
| | 810 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
| | 811 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
| | 812 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
| | 813 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
| | 814 | \r |
| | 815 | //\r |
| | 816 | // Allocate a buffer below 16MB to map the transfer to.\r |
| | 817 | //\r |
| | 818 | Status = gBS->AllocatePages (\r |
| | 819 | AllocateMaxAddress,\r |
| | 820 | EfiBootServicesData,\r |
| | 821 | IsaMapInfo->NumberOfPages,\r |
| | 822 | &IsaMapInfo->MappedHostAddress\r |
| | 823 | );\r |
| | 824 | if (EFI_ERROR (Status)) {\r |
| | 825 | FreePool (IsaMapInfo);\r |
| | 826 | *NumberOfBytes = 0;\r |
| | 827 | *Mapping = NULL;\r |
| | 828 | return Status;\r |
| | 829 | }\r |
| | 830 | //\r |
| | 831 | // If this is a read operation from the DMA agents's point of view,\r |
| | 832 | // then copy the contents of the real buffer into the mapped buffer\r |
| | 833 | // so the DMA agent can read the contents of the real buffer.\r |
| | 834 | //\r |
| | 835 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| | 836 | CopyMem (\r |
| | 837 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| | 838 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| | 839 | IsaMapInfo->NumberOfBytes\r |
| | 840 | );\r |
| | 841 | }\r |
| | 842 | //\r |
| | 843 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
| | 844 | //\r |
| | 845 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
| | 846 | } else {\r |
| | 847 | //\r |
| | 848 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
| | 849 | // HostAddress\r |
| | 850 | //\r |
| | 851 | *DeviceAddress = PhysicalAddress;\r |
| | 852 | }\r |
| | 853 | \r |
| | 854 | //\r |
| | 855 | // Figure out what to program into the DMA Channel Mode Register\r |
| | 856 | //\r |
| | 857 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
| | 858 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| | 859 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
| | 860 | } else {\r |
| | 861 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
| | 862 | }\r |
| | 863 | //\r |
| | 864 | // We only support EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE in simplified IsaIo\r |
| | 865 | //\r |
| | 866 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
| | 867 | \r |
| | 868 | //\r |
| | 869 | // A Slave DMA transfer can not cross a 64K boundary.\r |
| | 870 | // Compute *NumberOfBytes based on this restriction.\r |
| | 871 | //\r |
| | 872 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
| | 873 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
| | 874 | *NumberOfBytes = MaxNumberOfBytes;\r |
| | 875 | }\r |
| | 876 | //\r |
| | 877 | // Compute the values to program into the BaseAddress and Count registers\r |
| | 878 | // of the Slave DMA controller\r |
| | 879 | //\r |
| | 880 | BaseAddress = (UINT32) (*DeviceAddress);\r |
| | 881 | Count = (UINT16) (*NumberOfBytes - 1);\r |
| | 882 | //\r |
| | 883 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
| | 884 | // Clear the DMA Byte Pointer Register\r |
| | 885 | //\r |
| | 886 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
| | 887 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
| | 888 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
| | 889 | \r |
| | 890 | Status = WritePort (\r |
| | 891 | This,\r |
| | 892 | DmaMask,\r |
| | 893 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| | 894 | );\r |
| | 895 | if (EFI_ERROR (Status)) {\r |
| | 896 | return Status;\r |
| | 897 | }\r |
| | 898 | \r |
| | 899 | Status = WritePort (\r |
| | 900 | This,\r |
| | 901 | DmaClear,\r |
| | 902 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| | 903 | );\r |
| | 904 | if (EFI_ERROR (Status)) {\r |
| | 905 | return Status;\r |
| | 906 | }\r |
| | 907 | \r |
| | 908 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
| | 909 | if (EFI_ERROR (Status)) {\r |
| | 910 | return Status;\r |
| | 911 | }\r |
| | 912 | \r |
| | 913 | Status = WriteDmaPort (\r |
| | 914 | This,\r |
| | 915 | mDmaRegisters[ChannelNumber].Address,\r |
| | 916 | mDmaRegisters[ChannelNumber].Page,\r |
| | 917 | mDmaRegisters[ChannelNumber].Count,\r |
| | 918 | BaseAddress,\r |
| | 919 | Count\r |
| | 920 | );\r |
| | 921 | if (EFI_ERROR (Status)) {\r |
| | 922 | return Status;\r |
| | 923 | }\r |
| | 924 | \r |
| | 925 | Status = WritePort (\r |
| | 926 | This,\r |
| | 927 | DmaMask,\r |
| | 928 | (UINT8) (ChannelNumber & 0x03)\r |
| | 929 | );\r |
| | 930 | if (EFI_ERROR (Status)) {\r |
| | 931 | return Status;\r |
| | 932 | }\r |
| | 933 | \r |
| | 934 | return EFI_SUCCESS;\r |
| | 935 | }\r |
| | 936 | \r |
| | 937 | /**\r |
| | 938 | Maps a memory region for DMA. This implementation implement the \r |
| | 939 | the full mapping support.\r |
| | 940 | \r |
| | 941 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 942 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
| | 943 | the DMA operation is going to read or write to system memory. \r |
| | 944 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
| | 945 | If Operation and ChannelAttributes shows that this device \r |
| | 946 | performs bus mastering DMA, then this field is ignored. \r |
| | 947 | The legal range for this field is 0..7. \r |
| | 948 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
| | 949 | @param HostAddress The system memory address to map to the device. \r |
| | 950 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
| | 951 | of bytes that were mapped.\r |
| | 952 | @param DeviceAddress The resulting map address for the bus master device to use \r |
| | 953 | to access the hosts HostAddress. \r |
| | 954 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| | 955 | \r |
| | 956 | @retval EFI_SUCCESS - The range was mapped for the returned NumberOfBytes.\r |
| | 957 | @retval EFI_INVALID_PARAMETER - The Operation or HostAddress is undefined.\r |
| | 958 | @retval EFI_UNSUPPORTED - The HostAddress can not be mapped as a common buffer.\r |
| | 959 | @retval EFI_DEVICE_ERROR - The system hardware could not map the requested address.\r |
| | 960 | @retval EFI_OUT_OF_RESOURCES - The memory pages could not be allocated.\r |
| | 961 | **/\r |
| | 962 | EFI_STATUS\r |
| | 963 | IsaIoMapFullSupport (\r |
| | 964 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 965 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| | 966 | IN UINT8 ChannelNumber OPTIONAL,\r |
| | 967 | IN UINT32 ChannelAttributes,\r |
| | 968 | IN VOID *HostAddress,\r |
| | 969 | IN OUT UINTN *NumberOfBytes,\r |
| | 970 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| | 971 | OUT VOID **Mapping\r |
| | 972 | )\r |
| | 973 | {\r |
| | 974 | EFI_STATUS Status;\r |
| | 975 | BOOLEAN Master;\r |
| | 976 | BOOLEAN Read;\r |
| | 977 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| | 978 | ISA_MAP_INFO *IsaMapInfo;\r |
| | 979 | UINT8 DmaMode;\r |
| | 980 | UINTN MaxNumberOfBytes;\r |
| | 981 | UINT32 BaseAddress;\r |
| | 982 | UINT16 Count;\r |
| | 983 | UINT8 DmaMask;\r |
| | 984 | UINT8 DmaClear;\r |
| | 985 | UINT8 DmaChannelMode;\r |
| | 986 | \r |
| | 987 | if ((NULL == This) ||\r |
| | 988 | (NULL == HostAddress) ||\r |
| | 989 | (NULL == NumberOfBytes) ||\r |
| | 990 | (NULL == DeviceAddress) ||\r |
| | 991 | (NULL == Mapping)\r |
| | 992 | ) {\r |
| | 993 | return EFI_INVALID_PARAMETER;\r |
| | 994 | }\r |
| | 995 | \r |
| | 996 | //\r |
| | 997 | // Initialize the return values to their defaults\r |
| | 998 | //\r |
| | 999 | *Mapping = NULL;\r |
| | 1000 | \r |
| | 1001 | //\r |
| | 1002 | // Make sure the Operation parameter is valid\r |
| | 1003 | //\r |
| | 1004 | if (Operation < 0 || Operation >= EfiIsaIoOperationMaximum) {\r |
| | 1005 | return EFI_INVALID_PARAMETER;\r |
| | 1006 | }\r |
| | 1007 | \r |
| | 1008 | if (ChannelNumber >= 8) {\r |
| | 1009 | return EFI_INVALID_PARAMETER;\r |
| | 1010 | }\r |
| | 1011 | \r |
| | 1012 | //\r |
| | 1013 | // See if this is a Slave DMA Operation\r |
| | 1014 | //\r |
| | 1015 | Master = TRUE;\r |
| | 1016 | Read = FALSE;\r |
| | 1017 | if (Operation == EfiIsaIoOperationSlaveRead) {\r |
| | 1018 | Operation = EfiIsaIoOperationBusMasterRead;\r |
| | 1019 | Master = FALSE;\r |
| | 1020 | Read = TRUE;\r |
| | 1021 | }\r |
| | 1022 | \r |
| | 1023 | if (Operation == EfiIsaIoOperationSlaveWrite) {\r |
| | 1024 | Operation = EfiIsaIoOperationBusMasterWrite;\r |
| | 1025 | Master = FALSE;\r |
| | 1026 | Read = FALSE;\r |
| | 1027 | }\r |
| | 1028 | \r |
| | 1029 | if (!Master) {\r |
| | 1030 | //\r |
| | 1031 | // Make sure that ChannelNumber is a valid channel number\r |
| | 1032 | // Channel 4 is used to cascade, so it is illegal.\r |
| | 1033 | //\r |
| | 1034 | if (ChannelNumber == 4 || ChannelNumber > 7) {\r |
| | 1035 | return EFI_INVALID_PARAMETER;\r |
| | 1036 | }\r |
| | 1037 | //\r |
| | 1038 | // This implementation only support COMPATIBLE DMA Transfers\r |
| | 1039 | //\r |
| | 1040 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_COMPATIBLE)) {\r |
| | 1041 | return EFI_INVALID_PARAMETER;\r |
| | 1042 | }\r |
| | 1043 | \r |
| | 1044 | if (ChannelAttributes &\r |
| | 1045 | (\r |
| | 1046 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_A |\r |
| | 1047 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_B |\r |
| | 1048 | EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SPEED_C\r |
| | 1049 | )\r |
| | 1050 | ) {\r |
| | 1051 | return EFI_INVALID_PARAMETER;\r |
| | 1052 | }\r |
| | 1053 | \r |
| | 1054 | if (ChannelNumber < 4) {\r |
| | 1055 | //\r |
| | 1056 | // If this is Channel 0..3, then the width must be 8 bit\r |
| | 1057 | //\r |
| | 1058 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
| | 1059 | (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16)\r |
| | 1060 | ) {\r |
| | 1061 | return EFI_INVALID_PARAMETER;\r |
| | 1062 | }\r |
| | 1063 | } else {\r |
| | 1064 | //\r |
| | 1065 | // If this is Channel 4..7, then the width must be 16 bit\r |
| | 1066 | //\r |
| | 1067 | if ((ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_8) ||\r |
| | 1068 | (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_WIDTH_16))\r |
| | 1069 | ) {\r |
| | 1070 | return EFI_INVALID_PARAMETER;\r |
| | 1071 | }\r |
| | 1072 | }\r |
| | 1073 | //\r |
| | 1074 | // Either Demand Mode or Single Mode must be selected, but not both\r |
| | 1075 | //\r |
| | 1076 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
| | 1077 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
| | 1078 | return EFI_INVALID_PARAMETER;\r |
| | 1079 | }\r |
| | 1080 | } else {\r |
| | 1081 | if (!(ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE)) {\r |
| | 1082 | return EFI_INVALID_PARAMETER;\r |
| | 1083 | }\r |
| | 1084 | }\r |
| | 1085 | }\r |
| | 1086 | //\r |
| | 1087 | // Map the HostAddress to a DeviceAddress.\r |
| | 1088 | //\r |
| | 1089 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress;\r |
| | 1090 | if ((PhysicalAddress +*NumberOfBytes) > ISA_MAX_MEMORY_ADDRESS) {\r |
| | 1091 | //\r |
| | 1092 | // Common Buffer operations can not be remapped. If the common buffer\r |
| | 1093 | // is above 16MB, then it is not possible to generate a mapping, so return\r |
| | 1094 | // an error.\r |
| | 1095 | //\r |
| | 1096 | if (Operation == EfiIsaIoOperationBusMasterCommonBuffer) {\r |
| | 1097 | return EFI_UNSUPPORTED;\r |
| | 1098 | }\r |
| | 1099 | //\r |
| | 1100 | // Allocate an ISA_MAP_INFO structure to remember the mapping when Unmap()\r |
| | 1101 | // is called later.\r |
| | 1102 | //\r |
| | 1103 | IsaMapInfo = AllocatePool (sizeof (ISA_MAP_INFO));\r |
| | 1104 | if (IsaMapInfo == NULL) {\r |
| | 1105 | *NumberOfBytes = 0;\r |
| | 1106 | return EFI_OUT_OF_RESOURCES;\r |
| | 1107 | }\r |
| | 1108 | //\r |
| | 1109 | // Return a pointer to the MAP_INFO structure in Mapping\r |
| | 1110 | //\r |
| | 1111 | *Mapping = IsaMapInfo;\r |
| | 1112 | \r |
| | 1113 | //\r |
| | 1114 | // Initialize the MAP_INFO structure\r |
| | 1115 | //\r |
| | 1116 | IsaMapInfo->Operation = Operation;\r |
| | 1117 | IsaMapInfo->NumberOfBytes = *NumberOfBytes;\r |
| | 1118 | IsaMapInfo->NumberOfPages = EFI_SIZE_TO_PAGES (*NumberOfBytes);\r |
| | 1119 | IsaMapInfo->HostAddress = PhysicalAddress;\r |
| | 1120 | IsaMapInfo->MappedHostAddress = ISA_MAX_MEMORY_ADDRESS - 1;\r |
| | 1121 | \r |
| | 1122 | //\r |
| | 1123 | // Allocate a buffer below 16MB to map the transfer to.\r |
| | 1124 | //\r |
| | 1125 | Status = gBS->AllocatePages (\r |
| | 1126 | AllocateMaxAddress,\r |
| | 1127 | EfiBootServicesData,\r |
| | 1128 | IsaMapInfo->NumberOfPages,\r |
| | 1129 | &IsaMapInfo->MappedHostAddress\r |
| | 1130 | );\r |
| | 1131 | if (EFI_ERROR (Status)) {\r |
| | 1132 | FreePool (IsaMapInfo);\r |
| | 1133 | *NumberOfBytes = 0;\r |
| | 1134 | *Mapping = NULL;\r |
| | 1135 | return Status;\r |
| | 1136 | }\r |
| | 1137 | //\r |
| | 1138 | // If this is a read operation from the DMA agents's point of view,\r |
| | 1139 | // then copy the contents of the real buffer into the mapped buffer\r |
| | 1140 | // so the DMA agent can read the contents of the real buffer.\r |
| | 1141 | //\r |
| | 1142 | if (Operation == EfiIsaIoOperationBusMasterRead) {\r |
| | 1143 | CopyMem (\r |
| | 1144 | (VOID *) (UINTN) IsaMapInfo->MappedHostAddress,\r |
| | 1145 | (VOID *) (UINTN) IsaMapInfo->HostAddress,\r |
| | 1146 | IsaMapInfo->NumberOfBytes\r |
| | 1147 | );\r |
| | 1148 | }\r |
| | 1149 | //\r |
| | 1150 | // The DeviceAddress is the address of the maped buffer below 16 MB\r |
| | 1151 | //\r |
| | 1152 | *DeviceAddress = IsaMapInfo->MappedHostAddress;\r |
| | 1153 | } else {\r |
| | 1154 | //\r |
| | 1155 | // The transfer is below 16 MB, so the DeviceAddress is simply the\r |
| | 1156 | // HostAddress\r |
| | 1157 | //\r |
| | 1158 | *DeviceAddress = PhysicalAddress;\r |
| | 1159 | }\r |
| | 1160 | //\r |
| | 1161 | // If this is a Bus Master operation then return\r |
| | 1162 | //\r |
| | 1163 | if (Master) {\r |
| | 1164 | return EFI_SUCCESS;\r |
| | 1165 | }\r |
| | 1166 | //\r |
| | 1167 | // Figure out what to program into the DMA Channel Mode Register\r |
| | 1168 | //\r |
| | 1169 | DmaMode = (UINT8) (B_8237_DMA_CHMODE_INCREMENT | (ChannelNumber & 0x03));\r |
| | 1170 | if (Read) {\r |
| | 1171 | DmaMode |= V_8237_DMA_CHMODE_MEM2IO;\r |
| | 1172 | } else {\r |
| | 1173 | DmaMode |= V_8237_DMA_CHMODE_IO2MEM;\r |
| | 1174 | }\r |
| | 1175 | \r |
| | 1176 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_AUTO_INITIALIZE) {\r |
| | 1177 | DmaMode |= B_8237_DMA_CHMODE_AE;\r |
| | 1178 | }\r |
| | 1179 | \r |
| | 1180 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_DEMAND_MODE) {\r |
| | 1181 | DmaMode |= V_8237_DMA_CHMODE_DEMAND;\r |
| | 1182 | }\r |
| | 1183 | \r |
| | 1184 | if (ChannelAttributes & EFI_ISA_IO_SLAVE_DMA_ATTRIBUTE_SINGLE_MODE) {\r |
| | 1185 | DmaMode |= V_8237_DMA_CHMODE_SINGLE;\r |
| | 1186 | }\r |
| | 1187 | //\r |
| | 1188 | // A Slave DMA transfer can not cross a 64K boundary.\r |
| | 1189 | // Compute *NumberOfBytes based on this restriction.\r |
| | 1190 | //\r |
| | 1191 | MaxNumberOfBytes = 0x10000 - ((UINT32) (*DeviceAddress) & 0xffff);\r |
| | 1192 | if (*NumberOfBytes > MaxNumberOfBytes) {\r |
| | 1193 | *NumberOfBytes = MaxNumberOfBytes;\r |
| | 1194 | }\r |
| | 1195 | //\r |
| | 1196 | // Compute the values to program into the BaseAddress and Count registers\r |
| | 1197 | // of the Slave DMA controller\r |
| | 1198 | //\r |
| | 1199 | if (ChannelNumber < 4) {\r |
| | 1200 | BaseAddress = (UINT32) (*DeviceAddress);\r |
| | 1201 | Count = (UINT16) (*NumberOfBytes - 1);\r |
| | 1202 | } else {\r |
| | 1203 | BaseAddress = (UINT32) (((UINT32) (*DeviceAddress) & 0xff0000) | (((UINT32) (*DeviceAddress) & 0xffff) >> 1));\r |
| | 1204 | Count = (UINT16) ((*NumberOfBytes - 1) >> 1);\r |
| | 1205 | }\r |
| | 1206 | //\r |
| | 1207 | // Program the DMA Write Single Mask Register for ChannelNumber\r |
| | 1208 | // Clear the DMA Byte Pointer Register\r |
| | 1209 | //\r |
| | 1210 | if (ChannelNumber < 4) {\r |
| | 1211 | DmaMask = R_8237_DMA_WRSMSK_CH0_3;\r |
| | 1212 | DmaClear = R_8237_DMA_CBPR_CH0_3;\r |
| | 1213 | DmaChannelMode = R_8237_DMA_CHMODE_CH0_3;\r |
| | 1214 | } else {\r |
| | 1215 | DmaMask = R_8237_DMA_WRSMSK_CH4_7;\r |
| | 1216 | DmaClear = R_8237_DMA_CBPR_CH4_7;\r |
| | 1217 | DmaChannelMode = R_8237_DMA_CHMODE_CH4_7;\r |
| | 1218 | }\r |
| | 1219 | \r |
| | 1220 | Status = WritePort (\r |
| | 1221 | This,\r |
| | 1222 | DmaMask,\r |
| | 1223 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| | 1224 | );\r |
| | 1225 | if (EFI_ERROR (Status)) {\r |
| | 1226 | return Status;\r |
| | 1227 | }\r |
| | 1228 | \r |
| | 1229 | Status = WritePort (\r |
| | 1230 | This,\r |
| | 1231 | DmaClear,\r |
| | 1232 | (UINT8) (B_8237_DMA_WRSMSK_CMS | (ChannelNumber & 0x03))\r |
| | 1233 | );\r |
| | 1234 | if (EFI_ERROR (Status)) {\r |
| | 1235 | return Status;\r |
| | 1236 | }\r |
| | 1237 | \r |
| | 1238 | Status = WritePort (This, DmaChannelMode, DmaMode);\r |
| | 1239 | if (EFI_ERROR (Status)) {\r |
| | 1240 | return Status;\r |
| | 1241 | }\r |
| | 1242 | \r |
| | 1243 | Status = WriteDmaPort (\r |
| | 1244 | This,\r |
| | 1245 | mDmaRegisters[ChannelNumber].Address,\r |
| | 1246 | mDmaRegisters[ChannelNumber].Page,\r |
| | 1247 | mDmaRegisters[ChannelNumber].Count,\r |
| | 1248 | BaseAddress,\r |
| | 1249 | Count\r |
| | 1250 | );\r |
| | 1251 | if (EFI_ERROR (Status)) {\r |
| | 1252 | return Status;\r |
| | 1253 | }\r |
| | 1254 | \r |
| | 1255 | Status = WritePort (\r |
| | 1256 | This,\r |
| | 1257 | DmaMask,\r |
| | 1258 | (UINT8) (ChannelNumber & 0x03)\r |
| | 1259 | );\r |
| | 1260 | if (EFI_ERROR (Status)) {\r |
| | 1261 | return Status;\r |
| | 1262 | }\r |
| | 1263 | \r |
| | 1264 | return EFI_SUCCESS;\r |
| | 1265 | }\r |
| | 1266 | \r |
| | 1267 | /**\r |
| | 1268 | Maps a memory region for DMA\r |
| | 1269 | \r |
| | 1270 | @param This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 1271 | @param Operation Indicates the type of DMA (slave or bus master), and if \r |
| | 1272 | the DMA operation is going to read or write to system memory. \r |
| | 1273 | @param ChannelNumber The slave channel number to use for this DMA operation. \r |
| | 1274 | If Operation and ChannelAttributes shows that this device \r |
| | 1275 | performs bus mastering DMA, then this field is ignored. \r |
| | 1276 | The legal range for this field is 0..7. \r |
| | 1277 | @param ChannelAttributes The attributes of the DMA channel to use for this DMA operation\r |
| | 1278 | @param HostAddress The system memory address to map to the device. \r |
| | 1279 | @param NumberOfBytes On input the number of bytes to map. On output the number \r |
| | 1280 | of bytes that were mapped.\r |
| | 1281 | @param DeviceAddress The resulting map address for the bus master device to use \r |
| | 1282 | to access the hosts HostAddress. \r |
| | 1283 | @param Mapping A resulting value to pass to EFI_ISA_IO.Unmap().\r |
| | 1284 | \r |
| | 1285 | @retval EFI_SUCCESS The range was mapped for the returned NumberOfBytes.\r |
| | 1286 | @retval EFI_INVALID_PARAMETER The Operation or HostAddress is undefined.\r |
| | 1287 | @retval EFI_UNSUPPORTED The HostAddress can not be mapped as a common buffer.\r |
| | 1288 | @retval EFI_DEVICE_ERROR The system hardware could not map the requested address.\r |
| | 1289 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
| | 1290 | **/\r |
| | 1291 | EFI_STATUS\r |
| | 1292 | EFIAPI\r |
| | 1293 | IsaIoMap (\r |
| | 1294 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 1295 | IN EFI_ISA_IO_PROTOCOL_OPERATION Operation,\r |
| | 1296 | IN UINT8 ChannelNumber OPTIONAL,\r |
| | 1297 | IN UINT32 ChannelAttributes,\r |
| | 1298 | IN VOID *HostAddress,\r |
| | 1299 | IN OUT UINTN *NumberOfBytes,\r |
| | 1300 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| | 1301 | OUT VOID **Mapping\r |
| | 1302 | )\r |
| | 1303 | {\r |
| | 1304 | //\r |
| | 1305 | // Set Feature Flag PcdIsaBusSupportDma to FALSE to disable support for ISA DMA.\r |
| | 1306 | //\r |
| | 1307 | if (!FeaturePcdGet (PcdIsaBusSupportDma)) {\r |
| | 1308 | return EFI_UNSUPPORTED;\r |
| | 1309 | }\r |
| | 1310 | //\r |
| | 1311 | // Set Feature Flag PcdIsaBusSupportBusMaster to FALSE to disable support for \r |
| | 1312 | // ISA Bus Master.\r |
| | 1313 | //\r |
| | 1314 | // So we just return EFI_UNSUPPORTED for these functions.\r |
| | 1315 | //\r |
| | 1316 | if (FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| | 1317 | return IsaIoMapOnlySupportSlaveReadWrite (\r |
| | 1318 | This,\r |
| | 1319 | Operation,\r |
| | 1320 | ChannelNumber,\r |
| | 1321 | ChannelAttributes,\r |
| | 1322 | HostAddress,\r |
| | 1323 | NumberOfBytes,\r |
| | 1324 | DeviceAddress,\r |
| | 1325 | Mapping\r |
| | 1326 | );\r |
| | 1327 | \r |
| | 1328 | } else {\r |
| | 1329 | return IsaIoMapFullSupport (\r |
| | 1330 | This,\r |
| | 1331 | Operation,\r |
| | 1332 | ChannelNumber,\r |
| | 1333 | ChannelAttributes,\r |
| | 1334 | HostAddress,\r |
| | 1335 | NumberOfBytes,\r |
| | 1336 | DeviceAddress,\r |
| | 1337 | Mapping\r |
| | 1338 | );\r |
| | 1339 | }\r |
| | 1340 | }\r |
| | 1341 | \r |
| | 1342 | /**\r |
| | 1343 | Allocates pages that are suitable for an EfiIsaIoOperationBusMasterCommonBuffer mapping.\r |
| | 1344 | \r |
| | 1345 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 1346 | @param[in] Type The type allocation to perform.\r |
| | 1347 | @param[in] MemoryType The type of memory to allocate.\r |
| | 1348 | @param[in] Pages The number of pages to allocate.\r |
| | 1349 | @param[out] HostAddress A pointer to store the base address of the allocated range.\r |
| | 1350 | @param[in] Attributes The requested bit mask of attributes for the allocated range.\r |
| | 1351 | \r |
| | 1352 | @retval EFI_SUCCESS The requested memory pages were allocated.\r |
| | 1353 | @retval EFI_INVALID_PARAMETER Type is invalid or MemoryType is invalid or HostAddress is NULL\r |
| | 1354 | @retval EFI_UNSUPPORTED Attributes is unsupported or the memory range specified \r |
| | 1355 | by HostAddress, Pages, and Type is not available for common buffer use.\r |
| | 1356 | @retval EFI_OUT_OF_RESOURCES The memory pages could not be allocated.\r |
| | 1357 | **/\r |
| | 1358 | EFI_STATUS\r |
| | 1359 | EFIAPI\r |
| | 1360 | IsaIoAllocateBuffer (\r |
| | 1361 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 1362 | IN EFI_ALLOCATE_TYPE Type,\r |
| | 1363 | IN EFI_MEMORY_TYPE MemoryType,\r |
| | 1364 | IN UINTN Pages,\r |
| | 1365 | OUT VOID **HostAddress,\r |
| | 1366 | IN UINT64 Attributes\r |
| | 1367 | )\r |
| | 1368 | {\r |
| | 1369 | EFI_STATUS Status;\r |
| | 1370 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| | 1371 | \r |
| | 1372 | //\r |
| | 1373 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
| | 1374 | // ISA Bus Master.\r |
| | 1375 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| | 1376 | //\r |
| | 1377 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| | 1378 | return EFI_UNSUPPORTED;\r |
| | 1379 | }\r |
| | 1380 | \r |
| | 1381 | if (HostAddress == NULL) {\r |
| | 1382 | return EFI_INVALID_PARAMETER;\r |
| | 1383 | }\r |
| | 1384 | \r |
| | 1385 | if (Type < AllocateAnyPages || Type >= MaxAllocateType) {\r |
| | 1386 | return EFI_INVALID_PARAMETER;\r |
| | 1387 | }\r |
| | 1388 | //\r |
| | 1389 | // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r |
| | 1390 | //\r |
| | 1391 | if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {\r |
| | 1392 | return EFI_INVALID_PARAMETER;\r |
| | 1393 | }\r |
| | 1394 | \r |
| | 1395 | if (Attributes & ~(EFI_ISA_IO_ATTRIBUTE_MEMORY_WRITE_COMBINE | EFI_ISA_IO_ATTRIBUTE_MEMORY_CACHED)) {\r |
| | 1396 | return EFI_UNSUPPORTED;\r |
| | 1397 | }\r |
| | 1398 | \r |
| | 1399 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS) (UINTN) (ISA_MAX_MEMORY_ADDRESS - 1);\r |
| | 1400 | if (Type == AllocateAddress) {\r |
| | 1401 | if ((UINTN) (*HostAddress) >= ISA_MAX_MEMORY_ADDRESS) {\r |
| | 1402 | return EFI_UNSUPPORTED;\r |
| | 1403 | } else {\r |
| | 1404 | PhysicalAddress = (UINTN) (*HostAddress);\r |
| | 1405 | }\r |
| | 1406 | }\r |
| | 1407 | \r |
| | 1408 | if (Type == AllocateAnyPages) {\r |
| | 1409 | Type = AllocateMaxAddress;\r |
| | 1410 | }\r |
| | 1411 | \r |
| | 1412 | Status = gBS->AllocatePages (Type, MemoryType, Pages, &PhysicalAddress);\r |
| | 1413 | if (EFI_ERROR (Status)) {\r |
| | 1414 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 1415 | return Status;\r |
| | 1416 | }\r |
| | 1417 | \r |
| | 1418 | *HostAddress = (VOID *) (UINTN) PhysicalAddress;\r |
| | 1419 | return Status;\r |
| | 1420 | }\r |
| | 1421 | \r |
| | 1422 | /**\r |
| | 1423 | Frees memory that was allocated with EFI_ISA_IO.AllocateBuffer(). \r |
| | 1424 | \r |
| | 1425 | @param[in] This A pointer to the EFI_ISA_IO_PROTOCOL instance.\r |
| | 1426 | @param[in] Pages The number of pages to free.\r |
| | 1427 | @param[in] HostAddress The base address of the allocated range.\r |
| | 1428 | \r |
| | 1429 | @retval EFI_SUCCESS The requested memory pages were freed.\r |
| | 1430 | @retval EFI_INVALID_PARAMETER The memory was not allocated with EFI_ISA_IO.AllocateBufer().\r |
| | 1431 | **/\r |
| | 1432 | EFI_STATUS\r |
| | 1433 | EFIAPI\r |
| | 1434 | IsaIoFreeBuffer (\r |
| | 1435 | IN EFI_ISA_IO_PROTOCOL *This,\r |
| | 1436 | IN UINTN Pages,\r |
| | 1437 | IN VOID *HostAddress\r |
| | 1438 | )\r |
| | 1439 | {\r |
| | 1440 | EFI_STATUS Status;\r |
| | 1441 | \r |
| | 1442 | //\r |
| | 1443 | // Set Feature Flag PcdIsaBusOnlySupportSlaveDma to FALSE to disable support for \r |
| | 1444 | // ISA Bus Master.\r |
| | 1445 | // Or unset Feature Flag PcdIsaBusSupportDma to disable support for ISA DMA.\r |
| | 1446 | //\r |
| | 1447 | if (!FeaturePcdGet (PcdIsaBusSupportDma) || FeaturePcdGet (PcdIsaBusOnlySupportSlaveDma)) {\r |
| | 1448 | return EFI_UNSUPPORTED;\r |
| | 1449 | }\r |
| | 1450 | \r |
| | 1451 | Status = gBS->FreePages (\r |
| | 1452 | (EFI_PHYSICAL_ADDRESS) (UINTN) HostAddress,\r |
| | 1453 | Pages\r |
| | 1454 | );\r |
| | 1455 | if (EFI_ERROR (Status)) {\r |
| | 1456 | ReportErrorStatusCode (EFI_IO_BUS_LPC | EFI_IOB_EC_CONTROLLER_ERROR);\r |
| | 1457 | }\r |
| | 1458 | \r |
| | 1459 | return Status;\r |
| | 1460 | }\r |
| | 1461 | \r |
projects / mirror_edk2.git / blame_incremental