| c69dd9df |
1 | /*++\r |
| 2 | \r |
| 3 | Copyright (c) 2005 - 2007, Intel Corporation \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 |
| 8 | \r |
| 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 |
| 11 | \r |
| 12 | Module Name:\r |
| 13 | PcatPciRootBridgeIo.c\r |
| 14 | \r |
| 15 | Abstract:\r |
| 16 | \r |
| 17 | EFI PC AT PCI Root Bridge Io Protocol\r |
| 18 | \r |
| 19 | Revision History\r |
| 20 | \r |
| 21 | --*/\r |
| 22 | \r |
| 23 | #include "PcatPciRootBridge.h"\r |
| 24 | \r |
| 25 | //\r |
| 26 | // Protocol Member Function Prototypes\r |
| 27 | //\r |
| 28 | EFI_STATUS\r |
| 29 | EFIAPI\r |
| 30 | PcatRootBridgeIoPollMem ( \r |
| 31 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 32 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 33 | IN UINT64 Address,\r |
| 34 | IN UINT64 Mask,\r |
| 35 | IN UINT64 Value,\r |
| 36 | IN UINT64 Delay,\r |
| 37 | OUT UINT64 *Result\r |
| 38 | );\r |
| 39 | \r |
| 40 | EFI_STATUS\r |
| 41 | EFIAPI\r |
| 42 | PcatRootBridgeIoPollIo ( \r |
| 43 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 44 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 45 | IN UINT64 Address,\r |
| 46 | IN UINT64 Mask,\r |
| 47 | IN UINT64 Value,\r |
| 48 | IN UINT64 Delay,\r |
| 49 | OUT UINT64 *Result\r |
| 50 | );\r |
| 51 | \r |
| 52 | EFI_STATUS\r |
| 53 | EFIAPI\r |
| 54 | PcatRootBridgeIoMemRead (\r |
| 55 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 56 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 57 | IN UINT64 Address,\r |
| 58 | IN UINTN Count,\r |
| 59 | IN OUT VOID *Buffer\r |
| 60 | );\r |
| 61 | \r |
| 62 | EFI_STATUS\r |
| 63 | EFIAPI\r |
| 64 | PcatRootBridgeIoMemWrite (\r |
| 65 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 66 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 67 | IN UINT64 Address,\r |
| 68 | IN UINTN Count,\r |
| 69 | IN OUT VOID *Buffer\r |
| 70 | );\r |
| 71 | \r |
| 72 | EFI_STATUS\r |
| 73 | EFIAPI\r |
| 74 | PcatRootBridgeIoIoRead (\r |
| 75 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 76 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 77 | IN UINT64 UserAddress,\r |
| 78 | IN UINTN Count,\r |
| 79 | IN OUT VOID *UserBuffer\r |
| 80 | );\r |
| 81 | \r |
| 82 | EFI_STATUS\r |
| 83 | EFIAPI\r |
| 84 | PcatRootBridgeIoIoWrite (\r |
| 85 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 86 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 87 | IN UINT64 UserAddress,\r |
| 88 | IN UINTN Count,\r |
| 89 | IN OUT VOID *UserBuffer\r |
| 90 | );\r |
| 91 | \r |
| 92 | EFI_STATUS\r |
| 93 | EFIAPI\r |
| 94 | PcatRootBridgeIoCopyMem (\r |
| 95 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 96 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 97 | IN UINT64 DestAddress,\r |
| 98 | IN UINT64 SrcAddress,\r |
| 99 | IN UINTN Count\r |
| 100 | );\r |
| 101 | \r |
| 102 | EFI_STATUS\r |
| 103 | EFIAPI\r |
| 104 | PcatRootBridgeIoPciRead (\r |
| 105 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 106 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 107 | IN UINT64 Address,\r |
| 108 | IN UINTN Count,\r |
| 109 | IN OUT VOID *Buffer\r |
| 110 | );\r |
| 111 | \r |
| 112 | EFI_STATUS\r |
| 113 | EFIAPI\r |
| 114 | PcatRootBridgeIoPciWrite (\r |
| 115 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 116 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 117 | IN UINT64 Address,\r |
| 118 | IN UINTN Count,\r |
| 119 | IN OUT VOID *Buffer\r |
| 120 | );\r |
| 121 | \r |
| 122 | EFI_STATUS\r |
| 123 | EFIAPI\r |
| 124 | PcatRootBridgeIoMap (\r |
| 125 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 126 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation,\r |
| 127 | IN VOID *HostAddress,\r |
| 128 | IN OUT UINTN *NumberOfBytes,\r |
| 129 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| 130 | OUT VOID **Mapping\r |
| 131 | );\r |
| 132 | \r |
| 133 | EFI_STATUS\r |
| 134 | EFIAPI\r |
| 135 | PcatRootBridgeIoUnmap (\r |
| 136 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 137 | IN VOID *Mapping\r |
| 138 | );\r |
| 139 | \r |
| 140 | EFI_STATUS\r |
| 141 | EFIAPI\r |
| 142 | PcatRootBridgeIoAllocateBuffer (\r |
| 143 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 144 | IN EFI_ALLOCATE_TYPE Type,\r |
| 145 | IN EFI_MEMORY_TYPE MemoryType,\r |
| 146 | IN UINTN Pages,\r |
| 147 | OUT VOID **HostAddress,\r |
| 148 | IN UINT64 Attributes\r |
| 149 | );\r |
| 150 | \r |
| 151 | EFI_STATUS\r |
| 152 | EFIAPI\r |
| 153 | PcatRootBridgeIoFreeBuffer (\r |
| 154 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 155 | IN UINTN Pages,\r |
| 156 | OUT VOID *HostAddress\r |
| 157 | );\r |
| 158 | \r |
| 159 | EFI_STATUS\r |
| 160 | EFIAPI\r |
| 161 | PcatRootBridgeIoFlush (\r |
| 162 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This\r |
| 163 | );\r |
| 164 | \r |
| 165 | EFI_STATUS\r |
| 166 | EFIAPI\r |
| 167 | PcatRootBridgeIoGetAttributes (\r |
| 168 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 169 | OUT UINT64 *Supported,\r |
| 170 | OUT UINT64 *Attributes\r |
| 171 | );\r |
| 172 | \r |
| 173 | EFI_STATUS\r |
| 174 | EFIAPI\r |
| 175 | PcatRootBridgeIoSetAttributes (\r |
| 176 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 177 | IN UINT64 Attributes,\r |
| 178 | IN OUT UINT64 *ResourceBase,\r |
| 179 | IN OUT UINT64 *ResourceLength \r |
| 180 | ); \r |
| 181 | \r |
| 182 | EFI_STATUS\r |
| 183 | EFIAPI\r |
| 184 | PcatRootBridgeIoConfiguration (\r |
| 185 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 186 | OUT VOID **Resources\r |
| 187 | );\r |
| 188 | \r |
| 189 | //\r |
| 190 | // Private Function Prototypes\r |
| 191 | //\r |
| c69dd9df |
192 | EFI_STATUS\r |
| 193 | EFIAPI\r |
| 194 | PcatRootBridgeIoMemRW (\r |
| 195 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 196 | IN UINTN Count,\r |
| 197 | IN BOOLEAN InStrideFlag,\r |
| 198 | IN PTR In,\r |
| 199 | IN BOOLEAN OutStrideFlag,\r |
| 200 | OUT PTR Out\r |
| 201 | );\r |
| 202 | \r |
| 203 | EFI_STATUS\r |
| 204 | PcatRootBridgeIoConstructor (\r |
| 205 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *Protocol,\r |
| 206 | IN UINTN SegmentNumber\r |
| 207 | )\r |
| 208 | /*++\r |
| 209 | \r |
| 210 | Routine Description:\r |
| 211 | \r |
| 212 | Contruct the Pci Root Bridge Io protocol\r |
| 213 | \r |
| 214 | Arguments:\r |
| 215 | \r |
| 216 | Protocol - protocol to initialize\r |
| 217 | \r |
| 218 | Returns:\r |
| 219 | \r |
| 220 | None\r |
| 221 | \r |
| 222 | --*/\r |
| 223 | {\r |
| 224 | Protocol->ParentHandle = NULL;\r |
| 225 | \r |
| 226 | Protocol->PollMem = PcatRootBridgeIoPollMem;\r |
| 227 | Protocol->PollIo = PcatRootBridgeIoPollIo;\r |
| 228 | \r |
| 229 | Protocol->Mem.Read = PcatRootBridgeIoMemRead;\r |
| 230 | Protocol->Mem.Write = PcatRootBridgeIoMemWrite;\r |
| 231 | \r |
| 232 | Protocol->Io.Read = PcatRootBridgeIoIoRead;\r |
| 233 | Protocol->Io.Write = PcatRootBridgeIoIoWrite;\r |
| 234 | \r |
| 235 | Protocol->CopyMem = PcatRootBridgeIoCopyMem;\r |
| 236 | \r |
| 237 | Protocol->Pci.Read = PcatRootBridgeIoPciRead;\r |
| 238 | Protocol->Pci.Write = PcatRootBridgeIoPciWrite;\r |
| 239 | \r |
| 240 | Protocol->Map = PcatRootBridgeIoMap;\r |
| 241 | Protocol->Unmap = PcatRootBridgeIoUnmap;\r |
| 242 | \r |
| 243 | Protocol->AllocateBuffer = PcatRootBridgeIoAllocateBuffer;\r |
| 244 | Protocol->FreeBuffer = PcatRootBridgeIoFreeBuffer;\r |
| 245 | \r |
| 246 | Protocol->Flush = PcatRootBridgeIoFlush;\r |
| 247 | \r |
| 248 | Protocol->GetAttributes = PcatRootBridgeIoGetAttributes;\r |
| 249 | Protocol->SetAttributes = PcatRootBridgeIoSetAttributes;\r |
| 250 | \r |
| 251 | Protocol->Configuration = PcatRootBridgeIoConfiguration;\r |
| 252 | \r |
| 253 | Protocol->SegmentNumber = (UINT32)SegmentNumber;\r |
| 254 | \r |
| 255 | return EFI_SUCCESS;\r |
| 256 | }\r |
| 257 | \r |
| 258 | EFI_STATUS\r |
| 259 | EFIAPI\r |
| 260 | PcatRootBridgeIoPollMem ( \r |
| 261 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 262 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 263 | IN UINT64 Address,\r |
| 264 | IN UINT64 Mask,\r |
| 265 | IN UINT64 Value,\r |
| 266 | IN UINT64 Delay,\r |
| 267 | OUT UINT64 *Result\r |
| 268 | )\r |
| 269 | {\r |
| 270 | EFI_STATUS Status;\r |
| 271 | UINT64 NumberOfTicks;\r |
| 394bbc59 |
272 | UINT32 Remainder;\r |
| c69dd9df |
273 | \r |
| 274 | if (Result == NULL) {\r |
| 275 | return EFI_INVALID_PARAMETER;\r |
| 276 | }\r |
| 277 | \r |
| 278 | \r |
| 279 | if (Width < 0 || Width > EfiPciWidthUint64) {\r |
| 280 | return EFI_INVALID_PARAMETER;\r |
| 281 | }\r |
| 282 | //\r |
| 283 | // No matter what, always do a single poll.\r |
| 284 | //\r |
| 285 | Status = This->Mem.Read (This, Width, Address, 1, Result);\r |
| 286 | if ( EFI_ERROR(Status) ) {\r |
| 287 | return Status;\r |
| 288 | } \r |
| 289 | if ( (*Result & Mask) == Value ) {\r |
| 290 | return EFI_SUCCESS;\r |
| 291 | }\r |
| 292 | \r |
| 293 | if ( Delay != 0 ) {\r |
| 294 | \r |
| 295 | NumberOfTicks = DivU64x32Remainder (Delay, 100, &Remainder);\r |
| 296 | if ( Remainder !=0 ) {\r |
| 297 | NumberOfTicks += 1;\r |
| 298 | }\r |
| 299 | NumberOfTicks += 1;\r |
| 300 | \r |
| 301 | while ( NumberOfTicks ) {\r |
| 302 | \r |
| 303 | gBS->Stall (10);\r |
| 304 | \r |
| 305 | Status = This->Mem.Read (This, Width, Address, 1, Result);\r |
| 306 | if ( EFI_ERROR(Status) ) {\r |
| 307 | return Status;\r |
| 308 | }\r |
| 309 | \r |
| 310 | if ( (*Result & Mask) == Value ) {\r |
| 311 | return EFI_SUCCESS;\r |
| 312 | }\r |
| 313 | \r |
| 314 | NumberOfTicks -= 1;\r |
| 315 | }\r |
| 316 | }\r |
| 317 | return EFI_TIMEOUT;\r |
| 318 | }\r |
| 319 | \r |
| 320 | EFI_STATUS\r |
| 321 | EFIAPI\r |
| 322 | PcatRootBridgeIoPollIo ( \r |
| 323 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 324 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 325 | IN UINT64 Address,\r |
| 326 | IN UINT64 Mask,\r |
| 327 | IN UINT64 Value,\r |
| 328 | IN UINT64 Delay,\r |
| 329 | OUT UINT64 *Result\r |
| 330 | )\r |
| 331 | {\r |
| 332 | EFI_STATUS Status;\r |
| 333 | UINT64 NumberOfTicks;\r |
| 394bbc59 |
334 | UINT32 Remainder;\r |
| c69dd9df |
335 | \r |
| 336 | if (Result == NULL) {\r |
| 337 | return EFI_INVALID_PARAMETER;\r |
| 338 | }\r |
| 339 | \r |
| 340 | if (Width < 0 || Width > EfiPciWidthUint64) {\r |
| 341 | return EFI_INVALID_PARAMETER;\r |
| 342 | }\r |
| 343 | //\r |
| 344 | // No matter what, always do a single poll.\r |
| 345 | //\r |
| 346 | Status = This->Io.Read (This, Width, Address, 1, Result);\r |
| 347 | if ( EFI_ERROR(Status) ) {\r |
| 348 | return Status;\r |
| 349 | } \r |
| 350 | if ( (*Result & Mask) == Value ) {\r |
| 351 | return EFI_SUCCESS;\r |
| 352 | }\r |
| 353 | \r |
| 354 | if (Delay != 0) {\r |
| 355 | \r |
| 356 | NumberOfTicks = DivU64x32Remainder (Delay, 100, &Remainder);\r |
| 357 | if ( Remainder !=0 ) {\r |
| 358 | NumberOfTicks += 1;\r |
| 359 | }\r |
| 360 | NumberOfTicks += 1;\r |
| 361 | \r |
| 362 | while ( NumberOfTicks ) {\r |
| 363 | \r |
| 364 | gBS->Stall(10);\r |
| 365 | \r |
| 366 | Status = This->Io.Read (This, Width, Address, 1, Result);\r |
| 367 | if ( EFI_ERROR(Status) ) {\r |
| 368 | return Status;\r |
| 369 | }\r |
| 370 | \r |
| 371 | if ( (*Result & Mask) == Value ) {\r |
| 372 | return EFI_SUCCESS;\r |
| 373 | }\r |
| 374 | \r |
| 375 | NumberOfTicks -= 1;\r |
| 376 | }\r |
| 377 | }\r |
| 378 | return EFI_TIMEOUT;\r |
| 379 | }\r |
| 380 | \r |
| 381 | BOOLEAN\r |
| 382 | PcatRootBridgeMemAddressValid (\r |
| 383 | IN PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData,\r |
| 384 | IN UINT64 Address\r |
| 385 | )\r |
| 386 | {\r |
| 387 | if ((Address >= PrivateData->PciExpressBaseAddress) && (Address < PrivateData->PciExpressBaseAddress + 0x10000000)) {\r |
| 388 | return TRUE;\r |
| 389 | }\r |
| 390 | if ((Address >= PrivateData->MemBase) && (Address < PrivateData->MemLimit)) {\r |
| 391 | return TRUE;\r |
| 392 | }\r |
| 393 | \r |
| 394 | return FALSE;\r |
| 395 | }\r |
| 396 | \r |
| 397 | EFI_STATUS\r |
| 398 | EFIAPI\r |
| 399 | PcatRootBridgeIoMemRead (\r |
| 400 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 401 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 402 | IN UINT64 Address,\r |
| 403 | IN UINTN Count,\r |
| 404 | IN OUT VOID *Buffer\r |
| 405 | )\r |
| 406 | {\r |
| 407 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 408 | UINTN AlignMask;\r |
| 409 | PTR In;\r |
| 410 | PTR Out;\r |
| 411 | \r |
| 412 | if ( Buffer == NULL ) {\r |
| 413 | return EFI_INVALID_PARAMETER;\r |
| 414 | }\r |
| 415 | \r |
| 416 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 417 | \r |
| 418 | if (!PcatRootBridgeMemAddressValid (PrivateData, Address)) {\r |
| 419 | return EFI_INVALID_PARAMETER;\r |
| 420 | }\r |
| 421 | \r |
| 422 | AlignMask = (1 << (Width & 0x03)) - 1;\r |
| 423 | if (Address & AlignMask) {\r |
| 424 | return EFI_INVALID_PARAMETER;\r |
| 425 | }\r |
| 426 | \r |
| 427 | Address += PrivateData->PhysicalMemoryBase;\r |
| 428 | \r |
| 429 | In.buf = Buffer;\r |
| 430 | Out.buf = (VOID *)(UINTN) Address;\r |
| 431 | if (Width >= EfiPciWidthUint8 && Width <= EfiPciWidthUint64) {\r |
| 432 | return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, TRUE, Out);\r |
| 433 | }\r |
| 434 | if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {\r |
| 435 | return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, FALSE, Out);\r |
| 436 | }\r |
| 437 | if (Width >= EfiPciWidthFillUint8 && Width <= EfiPciWidthFillUint64) {\r |
| 438 | return PcatRootBridgeIoMemRW (Width, Count, FALSE, In, TRUE, Out);\r |
| 439 | }\r |
| 440 | \r |
| 441 | return EFI_INVALID_PARAMETER;\r |
| 442 | }\r |
| 443 | \r |
| 444 | EFI_STATUS\r |
| 445 | EFIAPI\r |
| 446 | PcatRootBridgeIoMemWrite (\r |
| 447 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 448 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 449 | IN UINT64 Address,\r |
| 450 | IN UINTN Count,\r |
| 451 | IN OUT VOID *Buffer\r |
| 452 | )\r |
| 453 | {\r |
| 454 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 455 | UINTN AlignMask;\r |
| 456 | PTR In;\r |
| 457 | PTR Out;\r |
| 458 | \r |
| 459 | if ( Buffer == NULL ) {\r |
| 460 | return EFI_INVALID_PARAMETER;\r |
| 461 | }\r |
| 462 | \r |
| 463 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 464 | \r |
| 465 | if (!PcatRootBridgeMemAddressValid (PrivateData, Address)) {\r |
| 466 | return EFI_INVALID_PARAMETER;\r |
| 467 | }\r |
| 468 | \r |
| 469 | AlignMask = (1 << (Width & 0x03)) - 1;\r |
| 470 | if (Address & AlignMask) {\r |
| 471 | return EFI_INVALID_PARAMETER;\r |
| 472 | }\r |
| 473 | \r |
| 474 | Address += PrivateData->PhysicalMemoryBase;\r |
| 475 | \r |
| 476 | In.buf = (VOID *)(UINTN) Address;\r |
| 477 | Out.buf = Buffer;\r |
| 478 | if (Width >= EfiPciWidthUint8 && Width <= EfiPciWidthUint64) {\r |
| 479 | return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, TRUE, Out);\r |
| 480 | }\r |
| 481 | if (Width >= EfiPciWidthFifoUint8 && Width <= EfiPciWidthFifoUint64) {\r |
| 482 | return PcatRootBridgeIoMemRW (Width, Count, FALSE, In, TRUE, Out);\r |
| 483 | }\r |
| 484 | if (Width >= EfiPciWidthFillUint8 && Width <= EfiPciWidthFillUint64) {\r |
| 485 | return PcatRootBridgeIoMemRW (Width, Count, TRUE, In, FALSE, Out);\r |
| 486 | }\r |
| 487 | \r |
| 488 | return EFI_INVALID_PARAMETER;\r |
| 489 | }\r |
| 490 | \r |
| 491 | EFI_STATUS\r |
| 492 | EFIAPI\r |
| 493 | PcatRootBridgeIoCopyMem (\r |
| 494 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 495 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 496 | IN UINT64 DestAddress,\r |
| 497 | IN UINT64 SrcAddress,\r |
| 498 | IN UINTN Count\r |
| 499 | )\r |
| 500 | \r |
| 501 | {\r |
| 502 | EFI_STATUS Status;\r |
| 503 | BOOLEAN Direction;\r |
| 504 | UINTN Stride;\r |
| 505 | UINTN Index;\r |
| 506 | UINT64 Result;\r |
| 507 | \r |
| 508 | if (Width < 0 || Width > EfiPciWidthUint64) {\r |
| 509 | return EFI_INVALID_PARAMETER;\r |
| 510 | } \r |
| 511 | \r |
| 512 | if (DestAddress == SrcAddress) {\r |
| 513 | return EFI_SUCCESS;\r |
| 514 | }\r |
| 515 | \r |
| 516 | Stride = (UINTN)1 << Width;\r |
| 517 | \r |
| 518 | Direction = TRUE;\r |
| 519 | if ((DestAddress > SrcAddress) && (DestAddress < (SrcAddress + Count * Stride))) {\r |
| 520 | Direction = FALSE;\r |
| 521 | SrcAddress = SrcAddress + (Count-1) * Stride;\r |
| 522 | DestAddress = DestAddress + (Count-1) * Stride;\r |
| 523 | }\r |
| 524 | \r |
| 525 | for (Index = 0;Index < Count;Index++) {\r |
| 526 | Status = PcatRootBridgeIoMemRead (\r |
| 527 | This,\r |
| 528 | Width,\r |
| 529 | SrcAddress,\r |
| 530 | 1,\r |
| 531 | &Result\r |
| 532 | );\r |
| 533 | if (EFI_ERROR (Status)) {\r |
| 534 | return Status;\r |
| 535 | }\r |
| 536 | Status = PcatRootBridgeIoMemWrite (\r |
| 537 | This,\r |
| 538 | Width,\r |
| 539 | DestAddress,\r |
| 540 | 1,\r |
| 541 | &Result\r |
| 542 | );\r |
| 543 | if (EFI_ERROR (Status)) {\r |
| 544 | return Status;\r |
| 545 | }\r |
| 546 | if (Direction) {\r |
| 547 | SrcAddress += Stride;\r |
| 548 | DestAddress += Stride;\r |
| 549 | } else {\r |
| 550 | SrcAddress -= Stride;\r |
| 551 | DestAddress -= Stride;\r |
| 552 | }\r |
| 553 | }\r |
| 554 | return EFI_SUCCESS;\r |
| 555 | }\r |
| 556 | \r |
| 557 | EFI_STATUS\r |
| 558 | EFIAPI\r |
| 559 | PcatRootBridgeIoPciRead (\r |
| 560 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 561 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 562 | IN UINT64 Address,\r |
| 563 | IN UINTN Count,\r |
| 564 | IN OUT VOID *Buffer\r |
| 565 | )\r |
| 566 | {\r |
| 567 | if (Buffer == NULL) {\r |
| 568 | return EFI_INVALID_PARAMETER;\r |
| 569 | }\r |
| 570 | \r |
| 571 | return PcatRootBridgeIoPciRW (This, FALSE, Width, Address, Count, Buffer);\r |
| 572 | }\r |
| 573 | \r |
| 574 | EFI_STATUS\r |
| 575 | EFIAPI\r |
| 576 | PcatRootBridgeIoPciWrite (\r |
| 577 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 578 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 579 | IN UINT64 Address,\r |
| 580 | IN UINTN Count,\r |
| 581 | IN OUT VOID *Buffer\r |
| 582 | )\r |
| 583 | {\r |
| 584 | if (Buffer == NULL) {\r |
| 585 | return EFI_INVALID_PARAMETER;\r |
| 586 | }\r |
| 587 | \r |
| 588 | return PcatRootBridgeIoPciRW (This, TRUE, Width, Address, Count, Buffer);\r |
| 589 | }\r |
| 590 | \r |
| 591 | EFI_STATUS\r |
| 592 | EFIAPI\r |
| 593 | PcatRootBridgeIoMap (\r |
| 594 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 595 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_OPERATION Operation,\r |
| 596 | IN VOID *HostAddress,\r |
| 597 | IN OUT UINTN *NumberOfBytes,\r |
| 598 | OUT EFI_PHYSICAL_ADDRESS *DeviceAddress,\r |
| 599 | OUT VOID **Mapping\r |
| 600 | )\r |
| 601 | \r |
| 602 | {\r |
| 603 | EFI_STATUS Status;\r |
| 604 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 605 | MAP_INFO *MapInfo;\r |
| 606 | MAP_INFO_INSTANCE *MapInstance;\r |
| 607 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 608 | \r |
| 609 | if ( HostAddress == NULL || NumberOfBytes == NULL || \r |
| 610 | DeviceAddress == NULL || Mapping == NULL ) {\r |
| 611 | \r |
| 612 | return EFI_INVALID_PARAMETER;\r |
| 613 | }\r |
| 614 | \r |
| 615 | //\r |
| 616 | // Perform a fence operation to make sure all memory operations are flushed\r |
| 617 | //\r |
| 618 | MemoryFence();\r |
| 619 | \r |
| 620 | //\r |
| 621 | // Initialize the return values to their defaults\r |
| 622 | //\r |
| 623 | *Mapping = NULL;\r |
| 624 | \r |
| 625 | //\r |
| 626 | // Make sure that Operation is valid\r |
| 627 | //\r |
| 628 | if (Operation < 0 || Operation >= EfiPciOperationMaximum) {\r |
| 629 | return EFI_INVALID_PARAMETER;\r |
| 630 | }\r |
| 631 | \r |
| 632 | //\r |
| 633 | // Most PCAT like chipsets can not handle performing DMA above 4GB.\r |
| 634 | // If any part of the DMA transfer being mapped is above 4GB, then\r |
| 635 | // map the DMA transfer to a buffer below 4GB.\r |
| 636 | //\r |
| 637 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress;\r |
| 638 | if ((PhysicalAddress + *NumberOfBytes) > 0x100000000) {\r |
| 639 | \r |
| 640 | //\r |
| 641 | // Common Buffer operations can not be remapped. If the common buffer\r |
| 642 | // if above 4GB, then it is not possible to generate a mapping, so return \r |
| 643 | // an error.\r |
| 644 | //\r |
| 645 | if (Operation == EfiPciOperationBusMasterCommonBuffer || Operation == EfiPciOperationBusMasterCommonBuffer64) {\r |
| 646 | return EFI_UNSUPPORTED;\r |
| 647 | }\r |
| 648 | \r |
| 649 | //\r |
| 650 | // Allocate a MAP_INFO structure to remember the mapping when Unmap() is\r |
| 651 | // called later.\r |
| 652 | //\r |
| 653 | Status = gBS->AllocatePool (\r |
| 654 | EfiBootServicesData, \r |
| 655 | sizeof(MAP_INFO), \r |
| 656 | &MapInfo\r |
| 657 | );\r |
| 658 | if (EFI_ERROR (Status)) {\r |
| 659 | *NumberOfBytes = 0;\r |
| 660 | return Status;\r |
| 661 | }\r |
| 662 | \r |
| 663 | //\r |
| 664 | // Return a pointer to the MAP_INFO structure in Mapping\r |
| 665 | //\r |
| 666 | *Mapping = MapInfo;\r |
| 667 | \r |
| 668 | //\r |
| 669 | // Initialize the MAP_INFO structure\r |
| 670 | //\r |
| 671 | MapInfo->Operation = Operation;\r |
| 672 | MapInfo->NumberOfBytes = *NumberOfBytes;\r |
| 673 | MapInfo->NumberOfPages = EFI_SIZE_TO_PAGES(*NumberOfBytes);\r |
| 674 | MapInfo->HostAddress = PhysicalAddress;\r |
| 675 | MapInfo->MappedHostAddress = 0x00000000ffffffff;\r |
| 676 | \r |
| 677 | //\r |
| 678 | // Allocate a buffer below 4GB to map the transfer to.\r |
| 679 | //\r |
| 680 | Status = gBS->AllocatePages (\r |
| 681 | AllocateMaxAddress, \r |
| 682 | EfiBootServicesData, \r |
| 683 | MapInfo->NumberOfPages,\r |
| 684 | &MapInfo->MappedHostAddress\r |
| 685 | );\r |
| 686 | if (EFI_ERROR(Status)) {\r |
| 687 | gBS->FreePool (MapInfo);\r |
| 688 | *NumberOfBytes = 0;\r |
| 689 | return Status;\r |
| 690 | }\r |
| 691 | \r |
| 692 | //\r |
| 693 | // If this is a read operation from the Bus Master's point of view,\r |
| 694 | // then copy the contents of the real buffer into the mapped buffer\r |
| 695 | // so the Bus Master can read the contents of the real buffer.\r |
| 696 | //\r |
| 697 | if (Operation == EfiPciOperationBusMasterRead || Operation == EfiPciOperationBusMasterRead64) {\r |
| 698 | CopyMem (\r |
| 699 | (VOID *)(UINTN)MapInfo->MappedHostAddress, \r |
| 700 | (VOID *)(UINTN)MapInfo->HostAddress,\r |
| 701 | MapInfo->NumberOfBytes\r |
| 702 | );\r |
| 703 | }\r |
| 704 | \r |
| 705 | \r |
| 706 | Status =gBS->AllocatePool (\r |
| 707 | EfiBootServicesData, \r |
| 708 | sizeof(MAP_INFO_INSTANCE), \r |
| 709 | &MapInstance\r |
| 710 | ); \r |
| 711 | if (EFI_ERROR(Status)) {\r |
| 712 | gBS->FreePages (MapInfo->MappedHostAddress,MapInfo->NumberOfPages);\r |
| 713 | gBS->FreePool (MapInfo);\r |
| 714 | *NumberOfBytes = 0;\r |
| 715 | return Status;\r |
| 716 | }\r |
| 717 | \r |
| 718 | MapInstance->Map=MapInfo;\r |
| 719 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 720 | InsertTailList(&PrivateData->MapInfo,&MapInstance->Link);\r |
| 721 | \r |
| 722 | //\r |
| 723 | // The DeviceAddress is the address of the maped buffer below 4GB\r |
| 724 | //\r |
| 725 | *DeviceAddress = MapInfo->MappedHostAddress;\r |
| 726 | } else {\r |
| 727 | //\r |
| 728 | // The transfer is below 4GB, so the DeviceAddress is simply the HostAddress\r |
| 729 | //\r |
| 730 | *DeviceAddress = PhysicalAddress;\r |
| 731 | }\r |
| 732 | \r |
| 733 | //\r |
| 734 | // Perform a fence operation to make sure all memory operations are flushed\r |
| 735 | //\r |
| 736 | MemoryFence();\r |
| 737 | \r |
| 738 | return EFI_SUCCESS;\r |
| 739 | }\r |
| 740 | \r |
| 741 | EFI_STATUS\r |
| 742 | EFIAPI\r |
| 743 | PcatRootBridgeIoUnmap (\r |
| 744 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 745 | IN VOID *Mapping\r |
| 746 | )\r |
| 747 | \r |
| 748 | {\r |
| 749 | MAP_INFO *MapInfo;\r |
| 750 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 751 | LIST_ENTRY *Link;\r |
| 752 | \r |
| 753 | //\r |
| 754 | // Perform a fence operation to make sure all memory operations are flushed\r |
| 755 | //\r |
| 756 | MemoryFence();\r |
| 757 | \r |
| 758 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 759 | //\r |
| 760 | // See if the Map() operation associated with this Unmap() required a mapping buffer.\r |
| 761 | // If a mapping buffer was not required, then this function simply returns EFI_SUCCESS.\r |
| 762 | //\r |
| 763 | if (Mapping != NULL) {\r |
| 764 | //\r |
| 765 | // Get the MAP_INFO structure from Mapping\r |
| 766 | //\r |
| 767 | MapInfo = (MAP_INFO *)Mapping;\r |
| 768 | \r |
| 769 | for (Link = PrivateData->MapInfo.ForwardLink; Link != &PrivateData->MapInfo; Link = Link->ForwardLink) {\r |
| 770 | if (((MAP_INFO_INSTANCE*)Link)->Map == MapInfo)\r |
| 771 | break;\r |
| 772 | }\r |
| 773 | \r |
| 774 | if (Link == &PrivateData->MapInfo) {\r |
| 775 | return EFI_INVALID_PARAMETER;\r |
| 776 | }\r |
| 777 | \r |
| 778 | RemoveEntryList(Link);\r |
| 779 | ((MAP_INFO_INSTANCE*)Link)->Map = NULL;\r |
| 780 | gBS->FreePool((MAP_INFO_INSTANCE*)Link);\r |
| 781 | \r |
| 782 | //\r |
| 783 | // If this is a write operation from the Bus Master's point of view,\r |
| 784 | // then copy the contents of the mapped buffer into the real buffer\r |
| 785 | // so the processor can read the contents of the real buffer.\r |
| 786 | //\r |
| 787 | if (MapInfo->Operation == EfiPciOperationBusMasterWrite || MapInfo->Operation == EfiPciOperationBusMasterWrite64) {\r |
| 788 | CopyMem (\r |
| 789 | (VOID *)(UINTN)MapInfo->HostAddress, \r |
| 790 | (VOID *)(UINTN)MapInfo->MappedHostAddress,\r |
| 791 | MapInfo->NumberOfBytes\r |
| 792 | );\r |
| 793 | }\r |
| 794 | \r |
| 795 | //\r |
| 796 | // Free the mapped buffer and the MAP_INFO structure.\r |
| 797 | //\r |
| 798 | gBS->FreePages (MapInfo->MappedHostAddress, MapInfo->NumberOfPages);\r |
| 799 | gBS->FreePool (Mapping);\r |
| 800 | }\r |
| 801 | \r |
| 802 | //\r |
| 803 | // Perform a fence operation to make sure all memory operations are flushed\r |
| 804 | //\r |
| 805 | MemoryFence();\r |
| 806 | \r |
| 807 | return EFI_SUCCESS;\r |
| 808 | }\r |
| 809 | \r |
| 810 | EFI_STATUS\r |
| 811 | EFIAPI\r |
| 812 | PcatRootBridgeIoAllocateBuffer (\r |
| 813 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 814 | IN EFI_ALLOCATE_TYPE Type,\r |
| 815 | IN EFI_MEMORY_TYPE MemoryType,\r |
| 816 | IN UINTN Pages,\r |
| 817 | OUT VOID **HostAddress,\r |
| 818 | IN UINT64 Attributes\r |
| 819 | )\r |
| 820 | {\r |
| 821 | EFI_STATUS Status;\r |
| 822 | EFI_PHYSICAL_ADDRESS PhysicalAddress;\r |
| 823 | \r |
| 824 | //\r |
| 825 | // Validate Attributes\r |
| 826 | //\r |
| 827 | if (Attributes & EFI_PCI_ATTRIBUTE_INVALID_FOR_ALLOCATE_BUFFER) {\r |
| 828 | return EFI_UNSUPPORTED;\r |
| 829 | }\r |
| 830 | \r |
| 831 | //\r |
| 832 | // Check for invalid inputs\r |
| 833 | //\r |
| 834 | if (HostAddress == NULL) {\r |
| 835 | return EFI_INVALID_PARAMETER;\r |
| 836 | }\r |
| 837 | \r |
| 838 | //\r |
| 839 | // The only valid memory types are EfiBootServicesData and EfiRuntimeServicesData\r |
| 840 | //\r |
| 841 | if (MemoryType != EfiBootServicesData && MemoryType != EfiRuntimeServicesData) {\r |
| 842 | return EFI_INVALID_PARAMETER;\r |
| 843 | }\r |
| 844 | \r |
| 845 | //\r |
| 846 | // Limit allocations to memory below 4GB\r |
| 847 | //\r |
| 848 | PhysicalAddress = (EFI_PHYSICAL_ADDRESS)(0xffffffff);\r |
| 849 | \r |
| 850 | Status = gBS->AllocatePages (AllocateMaxAddress, MemoryType, Pages, &PhysicalAddress);\r |
| 851 | if (EFI_ERROR (Status)) {\r |
| 852 | return Status;\r |
| 853 | }\r |
| 854 | \r |
| 855 | *HostAddress = (VOID *)(UINTN)PhysicalAddress;\r |
| 856 | \r |
| 857 | return EFI_SUCCESS;\r |
| 858 | }\r |
| 859 | \r |
| 860 | EFI_STATUS\r |
| 861 | EFIAPI\r |
| 862 | PcatRootBridgeIoFreeBuffer (\r |
| 863 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 864 | IN UINTN Pages,\r |
| 865 | OUT VOID *HostAddress\r |
| 866 | )\r |
| 867 | \r |
| 868 | {\r |
| 869 | \r |
| 870 | if( HostAddress == NULL ){\r |
| 871 | return EFI_INVALID_PARAMETER;\r |
| 872 | } \r |
| 873 | return gBS->FreePages ((EFI_PHYSICAL_ADDRESS)(UINTN)HostAddress, Pages);\r |
| 874 | }\r |
| 875 | \r |
| 876 | EFI_STATUS\r |
| 877 | EFIAPI\r |
| 878 | PcatRootBridgeIoFlush (\r |
| 879 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This\r |
| 880 | )\r |
| 881 | \r |
| 882 | {\r |
| 883 | //\r |
| 884 | // Perform a fence operation to make sure all memory operations are flushed\r |
| 885 | //\r |
| 886 | MemoryFence();\r |
| 887 | \r |
| 888 | return EFI_SUCCESS;\r |
| 889 | }\r |
| 890 | \r |
| 891 | EFI_STATUS\r |
| 892 | EFIAPI\r |
| 893 | PcatRootBridgeIoGetAttributes (\r |
| 894 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 895 | OUT UINT64 *Supported, OPTIONAL\r |
| 896 | OUT UINT64 *Attributes\r |
| 897 | )\r |
| 898 | \r |
| 899 | {\r |
| 900 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 901 | \r |
| 902 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 903 | \r |
| 904 | if (Attributes == NULL && Supported == NULL) {\r |
| 905 | return EFI_INVALID_PARAMETER;\r |
| 906 | }\r |
| 907 | \r |
| 908 | //\r |
| 909 | // Supported is an OPTIONAL parameter. See if it is NULL\r |
| 910 | //\r |
| 911 | if (Supported) {\r |
| 912 | //\r |
| 913 | // This is a generic driver for a PC-AT class system. It does not have any\r |
| 914 | // chipset specific knowlegde, so none of the attributes can be set or \r |
| 915 | // cleared. Any attempt to set attribute that are already set will succeed, \r |
| 916 | // and any attempt to set an attribute that is not supported will fail.\r |
| 917 | //\r |
| 918 | *Supported = PrivateData->Attributes;\r |
| 919 | }\r |
| 920 | \r |
| 921 | //\r |
| 922 | // Set Attrbutes to the attributes detected when the PCI Root Bridge was initialized\r |
| 923 | //\r |
| 924 | \r |
| 925 | if (Attributes) {\r |
| 926 | *Attributes = PrivateData->Attributes;\r |
| 927 | }\r |
| 928 | \r |
| 929 | \r |
| 930 | return EFI_SUCCESS;\r |
| 931 | }\r |
| 932 | \r |
| 933 | EFI_STATUS\r |
| 934 | EFIAPI\r |
| 935 | PcatRootBridgeIoSetAttributes (\r |
| 936 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 937 | IN UINT64 Attributes,\r |
| 938 | IN OUT UINT64 *ResourceBase,\r |
| 939 | IN OUT UINT64 *ResourceLength \r |
| 940 | )\r |
| 941 | \r |
| 942 | {\r |
| 943 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 944 | \r |
| 945 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 946 | \r |
| 947 | //\r |
| 948 | // This is a generic driver for a PC-AT class system. It does not have any\r |
| 949 | // chipset specific knowlegde, so none of the attributes can be set or \r |
| 950 | // cleared. Any attempt to set attribute that are already set will succeed, \r |
| 951 | // and any attempt to set an attribute that is not supported will fail.\r |
| 952 | //\r |
| 953 | if (Attributes & (~PrivateData->Attributes)) {\r |
| 954 | return EFI_UNSUPPORTED;\r |
| 955 | }\r |
| 956 | \r |
| 957 | return EFI_SUCCESS;\r |
| 958 | }\r |
| 959 | \r |
| 960 | EFI_STATUS\r |
| 961 | EFIAPI\r |
| 962 | PcatRootBridgeIoConfiguration (\r |
| 963 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL *This,\r |
| 964 | OUT VOID **Resources\r |
| 965 | )\r |
| 966 | \r |
| 967 | {\r |
| 968 | PCAT_PCI_ROOT_BRIDGE_INSTANCE *PrivateData;\r |
| 969 | \r |
| 970 | PrivateData = DRIVER_INSTANCE_FROM_PCI_ROOT_BRIDGE_IO_THIS(This);\r |
| 971 | \r |
| 972 | *Resources = PrivateData->Configuration;\r |
| 973 | \r |
| 974 | return EFI_SUCCESS;\r |
| 975 | }\r |
| 976 | \r |
| 977 | //\r |
| 978 | // Internal function\r |
| 979 | //\r |
| 980 | \r |
| c69dd9df |
981 | EFI_STATUS\r |
| 982 | EFIAPI\r |
| 983 | PcatRootBridgeIoMemRW (\r |
| 984 | IN EFI_PCI_ROOT_BRIDGE_IO_PROTOCOL_WIDTH Width,\r |
| 985 | IN UINTN Count,\r |
| 986 | IN BOOLEAN InStrideFlag,\r |
| 987 | IN PTR In,\r |
| 988 | IN BOOLEAN OutStrideFlag,\r |
| 989 | OUT PTR Out\r |
| 990 | )\r |
| 991 | /*++\r |
| 992 | \r |
| 993 | Routine Description:\r |
| 994 | \r |
| 995 | Private service to provide the memory read/write\r |
| 996 | \r |
| 997 | Arguments:\r |
| 998 | \r |
| 999 | Width of the Memory Access\r |
| 1000 | Count of the number of accesses to perform\r |
| 1001 | \r |
| 1002 | Returns:\r |
| 1003 | \r |
| 1004 | Status\r |
| 1005 | \r |
| 1006 | EFI_SUCCESS - Successful transaction\r |
| 1007 | EFI_INVALID_PARAMETER - Unsupported width and address combination\r |
| 1008 | \r |
| 1009 | --*/\r |
| 1010 | {\r |
| 1011 | UINTN Stride;\r |
| 1012 | UINTN InStride;\r |
| 1013 | UINTN OutStride;\r |
| 1014 | \r |
| 1015 | \r |
| 1016 | Width = Width & 0x03;\r |
| 1017 | Stride = (UINTN)1 << Width;\r |
| 1018 | InStride = InStrideFlag ? Stride : 0;\r |
| 1019 | OutStride = OutStrideFlag ? Stride : 0;\r |
| 1020 | \r |
| 1021 | //\r |
| 1022 | // Loop for each iteration and move the data\r |
| 1023 | //\r |
| 1024 | switch (Width) {\r |
| 1025 | case EfiPciWidthUint8:\r |
| 1026 | for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {\r |
| 1027 | MemoryFence();\r |
| 1028 | *In.ui8 = *Out.ui8;\r |
| 1029 | MemoryFence();\r |
| 1030 | }\r |
| 1031 | break;\r |
| 1032 | case EfiPciWidthUint16:\r |
| 1033 | for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {\r |
| 1034 | MemoryFence();\r |
| 1035 | *In.ui16 = *Out.ui16;\r |
| 1036 | MemoryFence();\r |
| 1037 | }\r |
| 1038 | break;\r |
| 1039 | case EfiPciWidthUint32:\r |
| 1040 | for (;Count > 0; Count--, In.buf += InStride, Out.buf += OutStride) {\r |
| 1041 | MemoryFence();\r |
| 1042 | *In.ui32 = *Out.ui32;\r |
| 1043 | MemoryFence();\r |
| 1044 | }\r |
| 1045 | break;\r |
| 1046 | default:\r |
| 1047 | return EFI_INVALID_PARAMETER;\r |
| 1048 | }\r |
| 1049 | \r |
| 1050 | return EFI_SUCCESS;\r |
| 1051 | }\r |
| 1052 | \r |
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