projects / mirror_edk2.git / blame
| Commit | Line | Data |
|---|---|---|
| ebd04fc2 | 1 | /** @file\r |
| 089e9c19 AC |
2 | I/O library for non I/O read and write access (memory map I/O read and\r |
| 3 | write only) architecture, such as ARM and RISC-V processor.\r | |
| ebd04fc2 | 4 | \r |
| 9095d37b | 5 | Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>\r |
| 4dd6f840 | 6 | Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r |
| 19c6d9fe | 7 | Copyright (c) 2017, AMD Incorporated. All rights reserved.<BR>\r |
| 089e9c19 | 8 | Copyright (c) 2020, Hewlett Packard Enterprise Development LP. All rights reserved.<BR>\r |
| 19c6d9fe | 9 | \r |
| 9344f092 | 10 | SPDX-License-Identifier: BSD-2-Clause-Patent\r |
| ebd04fc2 | 11 | \r |
| 12 | **/\r | |
| 13 | \r | |
| 14 | \r | |
| 15 | //\r | |
| 16 | // Include common header file for this module.\r | |
| 17 | //\r | |
| 18 | #include "BaseIoLibIntrinsicInternal.h"\r | |
| 19 | \r | |
| 20 | /**\r | |
| 21 | Reads an 8-bit I/O port.\r | |
| 22 | \r | |
| 23 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r | |
| 24 | This function must guarantee that all I/O read and write operations are\r | |
| 25 | serialized.\r | |
| 26 | \r | |
| 27 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
| 28 | \r | |
| 29 | @param Port The I/O port to read.\r | |
| 30 | \r | |
| 31 | @return The value read.\r | |
| 32 | \r | |
| 33 | **/\r | |
| 34 | UINT8\r | |
| 35 | EFIAPI\r | |
| 36 | IoRead8 (\r | |
| 37 | IN UINTN Port\r | |
| 38 | )\r | |
| 39 | {\r | |
| 40 | ASSERT (FALSE);\r | |
| 41 | return 0;\r | |
| 42 | }\r | |
| 43 | \r | |
| 44 | /**\r | |
| 45 | Writes an 8-bit I/O port.\r | |
| 46 | \r | |
| 47 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r | |
| 48 | and returns Value. This function must guarantee that all I/O read and write\r | |
| 49 | operations are serialized.\r | |
| 50 | \r | |
| 51 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
| 52 | \r | |
| 53 | @param Port The I/O port to write.\r | |
| 54 | @param Value The value to write to the I/O port.\r | |
| 55 | \r | |
| 56 | @return The value written the I/O port.\r | |
| 57 | \r | |
| 58 | **/\r | |
| 59 | UINT8\r | |
| 60 | EFIAPI\r | |
| 61 | IoWrite8 (\r | |
| 62 | IN UINTN Port,\r | |
| 63 | IN UINT8 Value\r | |
| 64 | )\r | |
| 65 | {\r | |
| 66 | ASSERT (FALSE);\r | |
| 67 | return Value;\r | |
| 68 | }\r | |
| 69 | \r | |
| 70 | /**\r | |
| 71 | Reads a 16-bit I/O port.\r | |
| 72 | \r | |
| 73 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r | |
| 74 | This function must guarantee that all I/O read and write operations are\r | |
| 75 | serialized.\r | |
| 76 | \r | |
| 77 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
| 78 | \r | |
| 79 | @param Port The I/O port to read.\r | |
| 80 | \r | |
| 81 | @return The value read.\r | |
| 82 | \r | |
| 83 | **/\r | |
| 84 | UINT16\r | |
| 85 | EFIAPI\r | |
| 86 | IoRead16 (\r | |
| 87 | IN UINTN Port\r | |
| 88 | )\r | |
| 89 | {\r | |
| 90 | ASSERT (FALSE);\r | |
| 91 | return 0;\r | |
| 92 | }\r | |
| 93 | \r | |
| 94 | /**\r | |
| 95 | Writes a 16-bit I/O port.\r | |
| 96 | \r | |
| 97 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r | |
| 98 | and returns Value. This function must guarantee that all I/O read and write\r | |
| 99 | operations are serialized.\r | |
| 100 | \r | |
| 101 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
| 102 | \r | |
| 103 | @param Port The I/O port to write.\r | |
| 104 | @param Value The value to write to the I/O port.\r | |
| 105 | \r | |
| 106 | @return The value written the I/O port.\r | |
| 107 | \r | |
| 108 | **/\r | |
| 109 | UINT16\r | |
| 110 | EFIAPI\r | |
| 111 | IoWrite16 (\r | |
| 112 | IN UINTN Port,\r | |
| 113 | IN UINT16 Value\r | |
| 114 | )\r | |
| 115 | {\r | |
| 116 | ASSERT (FALSE);\r | |
| 117 | return Value;\r | |
| 118 | }\r | |
| 119 | \r | |
| 120 | /**\r | |
| 121 | Reads a 32-bit I/O port.\r | |
| 122 | \r | |
| 123 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r | |
| 124 | This function must guarantee that all I/O read and write operations are\r | |
| 125 | serialized.\r | |
| 126 | \r | |
| 127 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
| 128 | \r | |
| 129 | @param Port The I/O port to read.\r | |
| 130 | \r | |
| 131 | @return The value read.\r | |
| 132 | \r | |
| 133 | **/\r | |
| 134 | UINT32\r | |
| 135 | EFIAPI\r | |
| 136 | IoRead32 (\r | |
| 137 | IN UINTN Port\r | |
| 138 | )\r | |
| 139 | {\r | |
| 140 | ASSERT (FALSE);\r | |
| 141 | return 0;\r | |
| 142 | }\r | |
| 143 | \r | |
| 144 | /**\r | |
| 145 | Writes a 32-bit I/O port.\r | |
| 146 | \r | |
| 147 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r | |
| 148 | and returns Value. This function must guarantee that all I/O read and write\r | |
| 149 | operations are serialized.\r | |
| 150 | \r | |
| 151 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
| 152 | \r | |
| 153 | @param Port The I/O port to write.\r | |
| 154 | @param Value The value to write to the I/O port.\r | |
| 155 | \r | |
| 156 | @return The value written the I/O port.\r | |
| 157 | \r | |
| 158 | **/\r | |
| 159 | UINT32\r | |
| 160 | EFIAPI\r | |
| 161 | IoWrite32 (\r | |
| 162 | IN UINTN Port,\r | |
| 163 | IN UINT32 Value\r | |
| 164 | )\r | |
| 165 | {\r | |
| 166 | ASSERT (FALSE);\r | |
| 167 | return Value;\r | |
| 168 | }\r | |
| 169 | \r | |
| 170 | /**\r | |
| 171 | Reads a 64-bit I/O port.\r | |
| 172 | \r | |
| 173 | Reads the 64-bit I/O port specified by Port. The 64-bit read value is returned.\r | |
| 174 | This function must guarantee that all I/O read and write operations are\r | |
| 175 | serialized.\r | |
| 176 | \r | |
| 177 | If 64-bit I/O port operations are not supported, then ASSERT().\r | |
| 178 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r | |
| 179 | \r | |
| 180 | @param Port The I/O port to read.\r | |
| 181 | \r | |
| 182 | @return The value read.\r | |
| 183 | \r | |
| 184 | **/\r | |
| 185 | UINT64\r | |
| 186 | EFIAPI\r | |
| 187 | IoRead64 (\r | |
| 188 | IN UINTN Port\r | |
| 189 | )\r | |
| 190 | {\r | |
| 191 | ASSERT (FALSE);\r | |
| 192 | return 0;\r | |
| 193 | }\r | |
| 194 | \r | |
| 195 | /**\r | |
| 196 | Writes a 64-bit I/O port.\r | |
| 197 | \r | |
| 198 | Writes the 64-bit I/O port specified by Port with the value specified by Value\r | |
| 199 | and returns Value. This function must guarantee that all I/O read and write\r | |
| 200 | operations are serialized.\r | |
| 201 | \r | |
| 202 | If 64-bit I/O port operations are not supported, then ASSERT().\r | |
| 203 | If Port is not aligned on a 64-bit boundary, then ASSERT().\r | |
| 204 | \r | |
| 205 | @param Port The I/O port to write.\r | |
| 206 | @param Value The value to write to the I/O port.\r | |
| 207 | \r | |
| 35a17154 | 208 | @return The value written to the I/O port.\r |
| ebd04fc2 | 209 | \r |
| 210 | **/\r | |
| 211 | UINT64\r | |
| 212 | EFIAPI\r | |
| 213 | IoWrite64 (\r | |
| 214 | IN UINTN Port,\r | |
| 215 | IN UINT64 Value\r | |
| 216 | )\r | |
| 217 | {\r | |
| 218 | ASSERT (FALSE);\r | |
| 219 | return 0;\r | |
| 220 | }\r | |
| 221 | \r | |
| 19c6d9fe LD |
222 | /**\r |
| 223 | Reads an 8-bit I/O port fifo into a block of memory.\r | |
| 224 | \r | |
| 225 | Reads the 8-bit I/O fifo port specified by Port.\r | |
| 226 | The port is read Count times, and the read data is\r | |
| 227 | stored in the provided Buffer.\r | |
| 228 | \r | |
| 229 | This function must guarantee that all I/O read and write operations are\r | |
| 230 | serialized.\r | |
| 231 | \r | |
| 232 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
| 233 | \r | |
| 234 | @param Port The I/O port to read.\r | |
| 235 | @param Count The number of times to read I/O port.\r | |
| 236 | @param Buffer The buffer to store the read data into.\r | |
| 237 | \r | |
| 238 | **/\r | |
| 239 | VOID\r | |
| 240 | EFIAPI\r | |
| 241 | IoReadFifo8 (\r | |
| 242 | IN UINTN Port,\r | |
| 243 | IN UINTN Count,\r | |
| 244 | OUT VOID *Buffer\r | |
| 245 | )\r | |
| 246 | {\r | |
| 247 | ASSERT (FALSE);\r | |
| 248 | }\r | |
| 249 | \r | |
| 250 | /**\r | |
| 251 | Writes a block of memory into an 8-bit I/O port fifo.\r | |
| 252 | \r | |
| 253 | Writes the 8-bit I/O fifo port specified by Port.\r | |
| 254 | The port is written Count times, and the write data is\r | |
| 255 | retrieved from the provided Buffer.\r | |
| 256 | \r | |
| 257 | This function must guarantee that all I/O write and write operations are\r | |
| 258 | serialized.\r | |
| 259 | \r | |
| 260 | If 8-bit I/O port operations are not supported, then ASSERT().\r | |
| 261 | \r | |
| 262 | @param Port The I/O port to write.\r | |
| 263 | @param Count The number of times to write I/O port.\r | |
| 264 | @param Buffer The buffer to retrieve the write data from.\r | |
| 265 | \r | |
| 266 | **/\r | |
| 267 | VOID\r | |
| 268 | EFIAPI\r | |
| 269 | IoWriteFifo8 (\r | |
| 270 | IN UINTN Port,\r | |
| 271 | IN UINTN Count,\r | |
| 272 | IN VOID *Buffer\r | |
| 273 | )\r | |
| 274 | {\r | |
| 275 | ASSERT (FALSE);\r | |
| 276 | }\r | |
| 277 | \r | |
| 278 | /**\r | |
| 279 | Reads a 16-bit I/O port fifo into a block of memory.\r | |
| 280 | \r | |
| 281 | Reads the 16-bit I/O fifo port specified by Port.\r | |
| 282 | The port is read Count times, and the read data is\r | |
| 283 | stored in the provided Buffer.\r | |
| 284 | \r | |
| 285 | This function must guarantee that all I/O read and write operations are\r | |
| 286 | serialized.\r | |
| 287 | \r | |
| 288 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
| 289 | \r | |
| 290 | @param Port The I/O port to read.\r | |
| 291 | @param Count The number of times to read I/O port.\r | |
| 292 | @param Buffer The buffer to store the read data into.\r | |
| 293 | \r | |
| 294 | **/\r | |
| 295 | VOID\r | |
| 296 | EFIAPI\r | |
| 297 | IoReadFifo16 (\r | |
| 298 | IN UINTN Port,\r | |
| 299 | IN UINTN Count,\r | |
| 300 | OUT VOID *Buffer\r | |
| 301 | )\r | |
| 302 | {\r | |
| 303 | ASSERT (FALSE);\r | |
| 304 | }\r | |
| 305 | \r | |
| 306 | /**\r | |
| 307 | Writes a block of memory into a 16-bit I/O port fifo.\r | |
| 308 | \r | |
| 309 | Writes the 16-bit I/O fifo port specified by Port.\r | |
| 310 | The port is written Count times, and the write data is\r | |
| 311 | retrieved from the provided Buffer.\r | |
| 312 | \r | |
| 313 | This function must guarantee that all I/O write and write operations are\r | |
| 314 | serialized.\r | |
| 315 | \r | |
| 316 | If 16-bit I/O port operations are not supported, then ASSERT().\r | |
| 317 | \r | |
| 318 | @param Port The I/O port to write.\r | |
| 319 | @param Count The number of times to write I/O port.\r | |
| 320 | @param Buffer The buffer to retrieve the write data from.\r | |
| 321 | \r | |
| 322 | **/\r | |
| 323 | VOID\r | |
| 324 | EFIAPI\r | |
| 325 | IoWriteFifo16 (\r | |
| 326 | IN UINTN Port,\r | |
| 327 | IN UINTN Count,\r | |
| 328 | IN VOID *Buffer\r | |
| 329 | )\r | |
| 330 | {\r | |
| 331 | ASSERT (FALSE);\r | |
| 332 | }\r | |
| 333 | \r | |
| 334 | /**\r | |
| 335 | Reads a 32-bit I/O port fifo into a block of memory.\r | |
| 336 | \r | |
| 337 | Reads the 32-bit I/O fifo port specified by Port.\r | |
| 338 | The port is read Count times, and the read data is\r | |
| 339 | stored in the provided Buffer.\r | |
| 340 | \r | |
| 341 | This function must guarantee that all I/O read and write operations are\r | |
| 342 | serialized.\r | |
| 343 | \r | |
| 344 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
| 345 | \r | |
| 346 | @param Port The I/O port to read.\r | |
| 347 | @param Count The number of times to read I/O port.\r | |
| 348 | @param Buffer The buffer to store the read data into.\r | |
| 349 | \r | |
| 350 | **/\r | |
| 351 | VOID\r | |
| 352 | EFIAPI\r | |
| 353 | IoReadFifo32 (\r | |
| 354 | IN UINTN Port,\r | |
| 355 | IN UINTN Count,\r | |
| 356 | OUT VOID *Buffer\r | |
| 357 | )\r | |
| 358 | {\r | |
| 359 | ASSERT (FALSE);\r | |
| 360 | }\r | |
| 361 | \r | |
| 362 | /**\r | |
| 363 | Writes a block of memory into a 32-bit I/O port fifo.\r | |
| 364 | \r | |
| 365 | Writes the 32-bit I/O fifo port specified by Port.\r | |
| 366 | The port is written Count times, and the write data is\r | |
| 367 | retrieved from the provided Buffer.\r | |
| 368 | \r | |
| 369 | This function must guarantee that all I/O write and write operations are\r | |
| 370 | serialized.\r | |
| 371 | \r | |
| 372 | If 32-bit I/O port operations are not supported, then ASSERT().\r | |
| 373 | \r | |
| 374 | @param Port The I/O port to write.\r | |
| 375 | @param Count The number of times to write I/O port.\r | |
| 376 | @param Buffer The buffer to retrieve the write data from.\r | |
| 377 | \r | |
| 378 | **/\r | |
| 379 | VOID\r | |
| 380 | EFIAPI\r | |
| 381 | IoWriteFifo32 (\r | |
| 382 | IN UINTN Port,\r | |
| 383 | IN UINTN Count,\r | |
| 384 | IN VOID *Buffer\r | |
| 385 | )\r | |
| 386 | {\r | |
| 387 | ASSERT (FALSE);\r | |
| 388 | }\r | |
| ebd04fc2 | 389 | \r |
| 390 | /**\r | |
| 391 | Reads an 8-bit MMIO register.\r | |
| 392 | \r | |
| 393 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r | |
| 394 | returned. This function must guarantee that all MMIO read and write\r | |
| 395 | operations are serialized.\r | |
| 396 | \r | |
| 397 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
| 398 | \r | |
| 399 | @param Address The MMIO register to read.\r | |
| 400 | \r | |
| 401 | @return The value read.\r | |
| 402 | \r | |
| 403 | **/\r | |
| 404 | UINT8\r | |
| 405 | EFIAPI\r | |
| 406 | MmioRead8 (\r | |
| 407 | IN UINTN Address\r | |
| 408 | )\r | |
| 409 | {\r | |
| 410 | UINT8 Value;\r | |
| 411 | \r | |
| 412 | Value = *(volatile UINT8*)Address;\r | |
| 413 | return Value;\r | |
| 414 | }\r | |
| 415 | \r | |
| 416 | /**\r | |
| 417 | Writes an 8-bit MMIO register.\r | |
| 418 | \r | |
| 419 | Writes the 8-bit MMIO register specified by Address with the value specified\r | |
| 420 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 421 | and write operations are serialized.\r | |
| 422 | \r | |
| 423 | If 8-bit MMIO register operations are not supported, then ASSERT().\r | |
| 424 | \r | |
| 425 | @param Address The MMIO register to write.\r | |
| 426 | @param Value The value to write to the MMIO register.\r | |
| 427 | \r | |
| 428 | **/\r | |
| 429 | UINT8\r | |
| 430 | EFIAPI\r | |
| 431 | MmioWrite8 (\r | |
| 432 | IN UINTN Address,\r | |
| 433 | IN UINT8 Value\r | |
| 434 | )\r | |
| 435 | {\r | |
| 436 | *(volatile UINT8*)Address = Value;\r | |
| 437 | return Value;\r | |
| 438 | }\r | |
| 439 | \r | |
| 440 | /**\r | |
| 441 | Reads a 16-bit MMIO register.\r | |
| 442 | \r | |
| 443 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r | |
| 444 | returned. This function must guarantee that all MMIO read and write\r | |
| 445 | operations are serialized.\r | |
| 446 | \r | |
| 447 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
| 448 | \r | |
| 449 | @param Address The MMIO register to read.\r | |
| 450 | \r | |
| 451 | @return The value read.\r | |
| 452 | \r | |
| 453 | **/\r | |
| 454 | UINT16\r | |
| 455 | EFIAPI\r | |
| 456 | MmioRead16 (\r | |
| 457 | IN UINTN Address\r | |
| 458 | )\r | |
| 459 | {\r | |
| 460 | UINT16 Value;\r | |
| 461 | \r | |
| 462 | ASSERT ((Address & 1) == 0);\r | |
| 463 | Value = *(volatile UINT16*)Address;\r | |
| 464 | return Value;\r | |
| 465 | }\r | |
| 466 | \r | |
| 467 | /**\r | |
| 468 | Writes a 16-bit MMIO register.\r | |
| 469 | \r | |
| 470 | Writes the 16-bit MMIO register specified by Address with the value specified\r | |
| 471 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 472 | and write operations are serialized.\r | |
| 473 | \r | |
| 474 | If 16-bit MMIO register operations are not supported, then ASSERT().\r | |
| 475 | \r | |
| 476 | @param Address The MMIO register to write.\r | |
| 477 | @param Value The value to write to the MMIO register.\r | |
| 478 | \r | |
| 479 | **/\r | |
| 480 | UINT16\r | |
| 481 | EFIAPI\r | |
| 482 | MmioWrite16 (\r | |
| 483 | IN UINTN Address,\r | |
| 484 | IN UINT16 Value\r | |
| 485 | )\r | |
| 486 | {\r | |
| 487 | ASSERT ((Address & 1) == 0);\r | |
| 488 | *(volatile UINT16*)Address = Value;\r | |
| 489 | return Value;\r | |
| 490 | }\r | |
| 491 | \r | |
| 492 | /**\r | |
| 493 | Reads a 32-bit MMIO register.\r | |
| 494 | \r | |
| 495 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r | |
| 496 | returned. This function must guarantee that all MMIO read and write\r | |
| 497 | operations are serialized.\r | |
| 498 | \r | |
| 499 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
| 500 | \r | |
| 501 | @param Address The MMIO register to read.\r | |
| 502 | \r | |
| 503 | @return The value read.\r | |
| 504 | \r | |
| 505 | **/\r | |
| 506 | UINT32\r | |
| 507 | EFIAPI\r | |
| 508 | MmioRead32 (\r | |
| 509 | IN UINTN Address\r | |
| 510 | )\r | |
| 511 | {\r | |
| 512 | UINT32 Value;\r | |
| 513 | \r | |
| 514 | ASSERT ((Address & 3) == 0);\r | |
| 515 | Value = *(volatile UINT32*)Address;\r | |
| 516 | return Value;\r | |
| 517 | }\r | |
| 518 | \r | |
| 519 | /**\r | |
| 520 | Writes a 32-bit MMIO register.\r | |
| 521 | \r | |
| 522 | Writes the 32-bit MMIO register specified by Address with the value specified\r | |
| 523 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 524 | and write operations are serialized.\r | |
| 525 | \r | |
| 526 | If 32-bit MMIO register operations are not supported, then ASSERT().\r | |
| 527 | \r | |
| 528 | @param Address The MMIO register to write.\r | |
| 529 | @param Value The value to write to the MMIO register.\r | |
| 530 | \r | |
| 531 | **/\r | |
| 532 | UINT32\r | |
| 533 | EFIAPI\r | |
| 534 | MmioWrite32 (\r | |
| 535 | IN UINTN Address,\r | |
| 536 | IN UINT32 Value\r | |
| 537 | )\r | |
| 538 | {\r | |
| 539 | ASSERT ((Address & 3) == 0);\r | |
| 540 | *(volatile UINT32*)Address = Value;\r | |
| 541 | return Value;\r | |
| 542 | }\r | |
| 543 | \r | |
| 544 | /**\r | |
| 545 | Reads a 64-bit MMIO register.\r | |
| 546 | \r | |
| 547 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r | |
| 548 | returned. This function must guarantee that all MMIO read and write\r | |
| 549 | operations are serialized.\r | |
| 550 | \r | |
| 551 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
| 552 | \r | |
| 553 | @param Address The MMIO register to read.\r | |
| 554 | \r | |
| 555 | @return The value read.\r | |
| 556 | \r | |
| 557 | **/\r | |
| 558 | UINT64\r | |
| 559 | EFIAPI\r | |
| 560 | MmioRead64 (\r | |
| 561 | IN UINTN Address\r | |
| 562 | )\r | |
| 563 | {\r | |
| 564 | UINT64 Value;\r | |
| 565 | \r | |
| 566 | ASSERT ((Address & 7) == 0);\r | |
| 567 | Value = *(volatile UINT64*)Address;\r | |
| 568 | return Value;\r | |
| 569 | }\r | |
| 570 | \r | |
| 571 | /**\r | |
| 572 | Writes a 64-bit MMIO register.\r | |
| 573 | \r | |
| 574 | Writes the 64-bit MMIO register specified by Address with the value specified\r | |
| 575 | by Value and returns Value. This function must guarantee that all MMIO read\r | |
| 576 | and write operations are serialized.\r | |
| 577 | \r | |
| 578 | If 64-bit MMIO register operations are not supported, then ASSERT().\r | |
| 579 | \r | |
| 580 | @param Address The MMIO register to write.\r | |
| 581 | @param Value The value to write to the MMIO register.\r | |
| 582 | \r | |
| 583 | **/\r | |
| 584 | UINT64\r | |
| 585 | EFIAPI\r | |
| 586 | MmioWrite64 (\r | |
| 587 | IN UINTN Address,\r | |
| 588 | IN UINT64 Value\r | |
| 589 | )\r | |
| 590 | {\r | |
| 591 | ASSERT ((Address & 7) == 0);\r | |
| 592 | *(volatile UINT64*)Address = Value;\r | |
| 593 | return Value;\r | |
| 594 | }\r | |
| 595 | \r |