| | 1 | /** @file\r |
| | 2 | Common I/O Library routines.\r |
| | 3 | \r |
| | 4 | Copyright (c) 2006 - 2021, Intel Corporation. All rights reserved.<BR>\r |
| | 5 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| | 6 | \r |
| | 7 | **/\r |
| | 8 | \r |
| | 9 | #include "BaseIoLibIntrinsicInternal.h"\r |
| | 10 | #include "IoLibTdx.h"\r |
| | 11 | \r |
| | 12 | /**\r |
| | 13 | Reads a 64-bit I/O port.\r |
| | 14 | \r |
| | 15 | Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.\r |
| | 16 | This function must guarantee that all I/O read and write operations are\r |
| | 17 | serialized.\r |
| | 18 | \r |
| | 19 | If 64-bit I/O port operations are not supported, then ASSERT().\r |
| | 20 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r |
| | 21 | \r |
| | 22 | @param Port The I/O port to read.\r |
| | 23 | \r |
| | 24 | @return The value read.\r |
| | 25 | \r |
| | 26 | **/\r |
| | 27 | UINT64\r |
| | 28 | EFIAPI\r |
| | 29 | IoRead64 (\r |
| | 30 | IN UINTN Port\r |
| | 31 | )\r |
| | 32 | {\r |
| | 33 | ASSERT (FALSE);\r |
| | 34 | return 0;\r |
| | 35 | }\r |
| | 36 | \r |
| | 37 | /**\r |
| | 38 | Writes a 64-bit I/O port.\r |
| | 39 | \r |
| | 40 | Writes the 64-bit I/O port specified by Port with the value specified by Value\r |
| | 41 | and returns Value. This function must guarantee that all I/O read and write\r |
| | 42 | operations are serialized.\r |
| | 43 | \r |
| | 44 | If 64-bit I/O port operations are not supported, then ASSERT().\r |
| | 45 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r |
| | 46 | \r |
| | 47 | @param Port The I/O port to write.\r |
| | 48 | @param Value The value to write to the I/O port.\r |
| | 49 | \r |
| | 50 | @return The value written the I/O port.\r |
| | 51 | \r |
| | 52 | **/\r |
| | 53 | UINT64\r |
| | 54 | EFIAPI\r |
| | 55 | IoWrite64 (\r |
| | 56 | IN UINTN Port,\r |
| | 57 | IN UINT64 Value\r |
| | 58 | )\r |
| | 59 | {\r |
| | 60 | ASSERT (FALSE);\r |
| | 61 | return 0;\r |
| | 62 | }\r |
| | 63 | \r |
| | 64 | /**\r |
| | 65 | Reads an 8-bit MMIO register.\r |
| | 66 | \r |
| | 67 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r |
| | 68 | returned. This function must guarantee that all MMIO read and write\r |
| | 69 | operations are serialized.\r |
| | 70 | \r |
| | 71 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
| | 72 | \r |
| | 73 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
| | 74 | \r |
| | 75 | @param Address The MMIO register to read.\r |
| | 76 | \r |
| | 77 | @return The value read.\r |
| | 78 | \r |
| | 79 | **/\r |
| | 80 | UINT8\r |
| | 81 | EFIAPI\r |
| | 82 | MmioRead8 (\r |
| | 83 | IN UINTN Address\r |
| | 84 | )\r |
| | 85 | {\r |
| | 86 | UINT8 Value;\r |
| | 87 | BOOLEAN Flag;\r |
| | 88 | \r |
| | 89 | Flag = FilterBeforeMmIoRead (FilterWidth8, Address, &Value);\r |
| | 90 | if (Flag) {\r |
| | 91 | MemoryFence ();\r |
| | 92 | \r |
| | 93 | if (IsTdxGuest ()) {\r |
| | 94 | Value = TdMmioRead8 (Address);\r |
| | 95 | } else {\r |
| | 96 | Value = *(volatile UINT8 *)Address;\r |
| | 97 | }\r |
| | 98 | \r |
| | 99 | MemoryFence ();\r |
| | 100 | }\r |
| | 101 | \r |
| | 102 | FilterAfterMmIoRead (FilterWidth8, Address, &Value);\r |
| | 103 | \r |
| | 104 | return Value;\r |
| | 105 | }\r |
| | 106 | \r |
| | 107 | /**\r |
| | 108 | Writes an 8-bit MMIO register.\r |
| | 109 | \r |
| | 110 | Writes the 8-bit MMIO register specified by Address with the value specified\r |
| | 111 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| | 112 | and write operations are serialized.\r |
| | 113 | \r |
| | 114 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
| | 115 | \r |
| | 116 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
| | 117 | \r |
| | 118 | @param Address The MMIO register to write.\r |
| | 119 | @param Value The value to write to the MMIO register.\r |
| | 120 | \r |
| | 121 | @return Value.\r |
| | 122 | \r |
| | 123 | **/\r |
| | 124 | UINT8\r |
| | 125 | EFIAPI\r |
| | 126 | MmioWrite8 (\r |
| | 127 | IN UINTN Address,\r |
| | 128 | IN UINT8 Value\r |
| | 129 | )\r |
| | 130 | {\r |
| | 131 | BOOLEAN Flag;\r |
| | 132 | \r |
| | 133 | Flag = FilterBeforeMmIoWrite (FilterWidth8, Address, &Value);\r |
| | 134 | if (Flag) {\r |
| | 135 | MemoryFence ();\r |
| | 136 | \r |
| | 137 | if (IsTdxGuest ()) {\r |
| | 138 | TdMmioWrite8 (Address, Value);\r |
| | 139 | } else {\r |
| | 140 | *(volatile UINT8 *)Address = Value;\r |
| | 141 | }\r |
| | 142 | \r |
| | 143 | MemoryFence ();\r |
| | 144 | }\r |
| | 145 | \r |
| | 146 | FilterAfterMmIoWrite (FilterWidth8, Address, &Value);\r |
| | 147 | \r |
| | 148 | return Value;\r |
| | 149 | }\r |
| | 150 | \r |
| | 151 | /**\r |
| | 152 | Reads a 16-bit MMIO register.\r |
| | 153 | \r |
| | 154 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r |
| | 155 | returned. This function must guarantee that all MMIO read and write\r |
| | 156 | operations are serialized.\r |
| | 157 | \r |
| | 158 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
| | 159 | If Address is not aligned on a 16-bit boundary, then ASSERT().\r |
| | 160 | \r |
| | 161 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
| | 162 | \r |
| | 163 | @param Address The MMIO register to read.\r |
| | 164 | \r |
| | 165 | @return The value read.\r |
| | 166 | \r |
| | 167 | **/\r |
| | 168 | UINT16\r |
| | 169 | EFIAPI\r |
| | 170 | MmioRead16 (\r |
| | 171 | IN UINTN Address\r |
| | 172 | )\r |
| | 173 | {\r |
| | 174 | UINT16 Value;\r |
| | 175 | BOOLEAN Flag;\r |
| | 176 | \r |
| | 177 | ASSERT ((Address & 1) == 0);\r |
| | 178 | Flag = FilterBeforeMmIoRead (FilterWidth16, Address, &Value);\r |
| | 179 | if (Flag) {\r |
| | 180 | MemoryFence ();\r |
| | 181 | \r |
| | 182 | if (IsTdxGuest ()) {\r |
| | 183 | Value = TdMmioRead16 (Address);\r |
| | 184 | } else {\r |
| | 185 | Value = *(volatile UINT16 *)Address;\r |
| | 186 | }\r |
| | 187 | \r |
| | 188 | MemoryFence ();\r |
| | 189 | }\r |
| | 190 | \r |
| | 191 | FilterAfterMmIoRead (FilterWidth16, Address, &Value);\r |
| | 192 | \r |
| | 193 | return Value;\r |
| | 194 | }\r |
| | 195 | \r |
| | 196 | /**\r |
| | 197 | Writes a 16-bit MMIO register.\r |
| | 198 | \r |
| | 199 | Writes the 16-bit MMIO register specified by Address with the value specified\r |
| | 200 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| | 201 | and write operations are serialized.\r |
| | 202 | \r |
| | 203 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
| | 204 | If Address is not aligned on a 16-bit boundary, then ASSERT().\r |
| | 205 | \r |
| | 206 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
| | 207 | \r |
| | 208 | @param Address The MMIO register to write.\r |
| | 209 | @param Value The value to write to the MMIO register.\r |
| | 210 | \r |
| | 211 | @return Value.\r |
| | 212 | \r |
| | 213 | **/\r |
| | 214 | UINT16\r |
| | 215 | EFIAPI\r |
| | 216 | MmioWrite16 (\r |
| | 217 | IN UINTN Address,\r |
| | 218 | IN UINT16 Value\r |
| | 219 | )\r |
| | 220 | {\r |
| | 221 | BOOLEAN Flag;\r |
| | 222 | \r |
| | 223 | ASSERT ((Address & 1) == 0);\r |
| | 224 | \r |
| | 225 | Flag = FilterBeforeMmIoWrite (FilterWidth16, Address, &Value);\r |
| | 226 | if (Flag) {\r |
| | 227 | MemoryFence ();\r |
| | 228 | \r |
| | 229 | if (IsTdxGuest ()) {\r |
| | 230 | TdMmioWrite16 (Address, Value);\r |
| | 231 | } else {\r |
| | 232 | *(volatile UINT16 *)Address = Value;\r |
| | 233 | }\r |
| | 234 | \r |
| | 235 | MemoryFence ();\r |
| | 236 | }\r |
| | 237 | \r |
| | 238 | FilterAfterMmIoWrite (FilterWidth16, Address, &Value);\r |
| | 239 | \r |
| | 240 | return Value;\r |
| | 241 | }\r |
| | 242 | \r |
| | 243 | /**\r |
| | 244 | Reads a 32-bit MMIO register.\r |
| | 245 | \r |
| | 246 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r |
| | 247 | returned. This function must guarantee that all MMIO read and write\r |
| | 248 | operations are serialized.\r |
| | 249 | \r |
| | 250 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
| | 251 | If Address is not aligned on a 32-bit boundary, then ASSERT().\r |
| | 252 | \r |
| | 253 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
| | 254 | \r |
| | 255 | @param Address The MMIO register to read.\r |
| | 256 | \r |
| | 257 | @return The value read.\r |
| | 258 | \r |
| | 259 | **/\r |
| | 260 | UINT32\r |
| | 261 | EFIAPI\r |
| | 262 | MmioRead32 (\r |
| | 263 | IN UINTN Address\r |
| | 264 | )\r |
| | 265 | {\r |
| | 266 | UINT32 Value;\r |
| | 267 | BOOLEAN Flag;\r |
| | 268 | \r |
| | 269 | ASSERT ((Address & 3) == 0);\r |
| | 270 | \r |
| | 271 | Flag = FilterBeforeMmIoRead (FilterWidth32, Address, &Value);\r |
| | 272 | if (Flag) {\r |
| | 273 | MemoryFence ();\r |
| | 274 | \r |
| | 275 | if (IsTdxGuest ()) {\r |
| | 276 | Value = TdMmioRead32 (Address);\r |
| | 277 | } else {\r |
| | 278 | Value = *(volatile UINT32 *)Address;\r |
| | 279 | }\r |
| | 280 | \r |
| | 281 | MemoryFence ();\r |
| | 282 | }\r |
| | 283 | \r |
| | 284 | FilterAfterMmIoRead (FilterWidth32, Address, &Value);\r |
| | 285 | \r |
| | 286 | return Value;\r |
| | 287 | }\r |
| | 288 | \r |
| | 289 | /**\r |
| | 290 | Writes a 32-bit MMIO register.\r |
| | 291 | \r |
| | 292 | Writes the 32-bit MMIO register specified by Address with the value specified\r |
| | 293 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| | 294 | and write operations are serialized.\r |
| | 295 | \r |
| | 296 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
| | 297 | If Address is not aligned on a 32-bit boundary, then ASSERT().\r |
| | 298 | \r |
| | 299 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
| | 300 | \r |
| | 301 | @param Address The MMIO register to write.\r |
| | 302 | @param Value The value to write to the MMIO register.\r |
| | 303 | \r |
| | 304 | @return Value.\r |
| | 305 | \r |
| | 306 | **/\r |
| | 307 | UINT32\r |
| | 308 | EFIAPI\r |
| | 309 | MmioWrite32 (\r |
| | 310 | IN UINTN Address,\r |
| | 311 | IN UINT32 Value\r |
| | 312 | )\r |
| | 313 | {\r |
| | 314 | BOOLEAN Flag;\r |
| | 315 | \r |
| | 316 | ASSERT ((Address & 3) == 0);\r |
| | 317 | \r |
| | 318 | Flag = FilterBeforeMmIoWrite (FilterWidth32, Address, &Value);\r |
| | 319 | if (Flag) {\r |
| | 320 | MemoryFence ();\r |
| | 321 | \r |
| | 322 | if (IsTdxGuest ()) {\r |
| | 323 | TdMmioWrite32 (Address, Value);\r |
| | 324 | } else {\r |
| | 325 | *(volatile UINT32 *)Address = Value;\r |
| | 326 | }\r |
| | 327 | \r |
| | 328 | MemoryFence ();\r |
| | 329 | }\r |
| | 330 | \r |
| | 331 | FilterAfterMmIoWrite (FilterWidth32, Address, &Value);\r |
| | 332 | \r |
| | 333 | return Value;\r |
| | 334 | }\r |
| | 335 | \r |
| | 336 | /**\r |
| | 337 | Reads a 64-bit MMIO register.\r |
| | 338 | \r |
| | 339 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r |
| | 340 | returned. This function must guarantee that all MMIO read and write\r |
| | 341 | operations are serialized.\r |
| | 342 | \r |
| | 343 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
| | 344 | If Address is not aligned on a 64-bit boundary, then ASSERT().\r |
| | 345 | \r |
| | 346 | For Td guest TDVMCALL_MMIO is invoked to read MMIO registers.\r |
| | 347 | \r |
| | 348 | @param Address The MMIO register to read.\r |
| | 349 | \r |
| | 350 | @return The value read.\r |
| | 351 | \r |
| | 352 | **/\r |
| | 353 | UINT64\r |
| | 354 | EFIAPI\r |
| | 355 | MmioRead64 (\r |
| | 356 | IN UINTN Address\r |
| | 357 | )\r |
| | 358 | {\r |
| | 359 | UINT64 Value;\r |
| | 360 | BOOLEAN Flag;\r |
| | 361 | \r |
| | 362 | ASSERT ((Address & 7) == 0);\r |
| | 363 | \r |
| | 364 | Flag = FilterBeforeMmIoRead (FilterWidth64, Address, &Value);\r |
| | 365 | if (Flag) {\r |
| | 366 | MemoryFence ();\r |
| | 367 | \r |
| | 368 | if (IsTdxGuest ()) {\r |
| | 369 | Value = TdMmioRead64 (Address);\r |
| | 370 | } else {\r |
| | 371 | Value = *(volatile UINT64 *)Address;\r |
| | 372 | }\r |
| | 373 | \r |
| | 374 | MemoryFence ();\r |
| | 375 | }\r |
| | 376 | \r |
| | 377 | FilterAfterMmIoRead (FilterWidth64, Address, &Value);\r |
| | 378 | \r |
| | 379 | return Value;\r |
| | 380 | }\r |
| | 381 | \r |
| | 382 | /**\r |
| | 383 | Writes a 64-bit MMIO register.\r |
| | 384 | \r |
| | 385 | Writes the 64-bit MMIO register specified by Address with the value specified\r |
| | 386 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| | 387 | and write operations are serialized.\r |
| | 388 | \r |
| | 389 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
| | 390 | If Address is not aligned on a 64-bit boundary, then ASSERT().\r |
| | 391 | \r |
| | 392 | For Td guest TDVMCALL_MMIO is invoked to write MMIO registers.\r |
| | 393 | \r |
| | 394 | @param Address The MMIO register to write.\r |
| | 395 | @param Value The value to write to the MMIO register.\r |
| | 396 | \r |
| | 397 | **/\r |
| | 398 | UINT64\r |
| | 399 | EFIAPI\r |
| | 400 | MmioWrite64 (\r |
| | 401 | IN UINTN Address,\r |
| | 402 | IN UINT64 Value\r |
| | 403 | )\r |
| | 404 | {\r |
| | 405 | BOOLEAN Flag;\r |
| | 406 | \r |
| | 407 | ASSERT ((Address & 7) == 0);\r |
| | 408 | \r |
| | 409 | Flag = FilterBeforeMmIoWrite (FilterWidth64, Address, &Value);\r |
| | 410 | if (Flag) {\r |
| | 411 | MemoryFence ();\r |
| | 412 | \r |
| | 413 | if (IsTdxGuest ()) {\r |
| | 414 | TdMmioWrite64 (Address, Value);\r |
| | 415 | } else {\r |
| | 416 | *(volatile UINT64 *)Address = Value;\r |
| | 417 | }\r |
| | 418 | \r |
| | 419 | MemoryFence ();\r |
| | 420 | }\r |
| | 421 | \r |
| | 422 | FilterAfterMmIoWrite (FilterWidth64, Address, &Value);\r |
| | 423 | \r |
| | 424 | return Value;\r |
| | 425 | }\r |
projects / mirror_edk2.git / blame_incremental