| 1 | /** @file\r |
| 2 | I/O Library. This file has compiler specifics for Microsft C as there is no\r |
| 3 | ANSI C standard for doing IO.\r |
| 4 | \r |
| 5 | MSC - uses intrinsic functions and the optimize will remove the function call\r |
| 6 | overhead.\r |
| 7 | \r |
| 8 | We don't advocate putting compiler specifics in libraries or drivers but there\r |
| 9 | is no other way to make this work.\r |
| 10 | \r |
| 11 | Copyright (c) 2006 - 2007, Intel Corporation<BR>\r |
| 12 | All rights reserved. This program and the accompanying materials\r |
| 13 | are licensed and made available under the terms and conditions of the BSD License\r |
| 14 | which accompanies this distribution. The full text of the license may be found at\r |
| 15 | http://opensource.org/licenses/bsd-license.php\r |
| 16 | \r |
| 17 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r |
| 18 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r |
| 19 | \r |
| 20 | **/\r |
| 21 | \r |
| 22 | \r |
| 23 | //\r |
| 24 | // Include common header file for this module.\r |
| 25 | //\r |
| 26 | #include "BaseIoLibIntrinsicInternal.h"\r |
| 27 | \r |
| 28 | //\r |
| 29 | // Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics\r |
| 30 | //\r |
| 31 | int _inp (unsigned short port);\r |
| 32 | unsigned short _inpw (unsigned short port);\r |
| 33 | unsigned long _inpd (unsigned short port);\r |
| 34 | int _outp (unsigned short port, int databyte );\r |
| 35 | unsigned short _outpw (unsigned short port, unsigned short dataword );\r |
| 36 | unsigned long _outpd (unsigned short port, unsigned long dataword );\r |
| 37 | void _ReadWriteBarrier (void);\r |
| 38 | \r |
| 39 | #pragma intrinsic(_inp)\r |
| 40 | #pragma intrinsic(_inpw)\r |
| 41 | #pragma intrinsic(_inpd)\r |
| 42 | #pragma intrinsic(_outp)\r |
| 43 | #pragma intrinsic(_outpw)\r |
| 44 | #pragma intrinsic(_outpd)\r |
| 45 | #pragma intrinsic(_ReadWriteBarrier)\r |
| 46 | \r |
| 47 | //\r |
| 48 | // _ReadWriteBarrier() forces memory reads and writes to complete at the point\r |
| 49 | // in the call. This is only a hint to the compiler and does emit code.\r |
| 50 | // In past versions of the compiler, _ReadWriteBarrier was enforced only\r |
| 51 | // locally and did not affect functions up the call tree. In Visual C++\r |
| 52 | // 2005, _ReadWriteBarrier is enforced all the way up the call tree.\r |
| 53 | //\r |
| 54 | \r |
| 55 | /**\r |
| 56 | Reads an 8-bit I/O port.\r |
| 57 | \r |
| 58 | Reads the 8-bit I/O port specified by Port. The 8-bit read value is returned.\r |
| 59 | This function must guarantee that all I/O read and write operations are\r |
| 60 | serialized.\r |
| 61 | \r |
| 62 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
| 63 | \r |
| 64 | @param Port The I/O port to read.\r |
| 65 | \r |
| 66 | @return The value read.\r |
| 67 | \r |
| 68 | **/\r |
| 69 | UINT8\r |
| 70 | EFIAPI\r |
| 71 | IoRead8 (\r |
| 72 | IN UINTN Port\r |
| 73 | )\r |
| 74 | {\r |
| 75 | UINT8 Value;\r |
| 76 | \r |
| 77 | _ReadWriteBarrier ();\r |
| 78 | Value = (UINT8)_inp ((UINT16)Port);\r |
| 79 | _ReadWriteBarrier ();\r |
| 80 | return Value;\r |
| 81 | }\r |
| 82 | \r |
| 83 | /**\r |
| 84 | Writes an 8-bit I/O port.\r |
| 85 | \r |
| 86 | Writes the 8-bit I/O port specified by Port with the value specified by Value\r |
| 87 | and returns Value. This function must guarantee that all I/O read and write\r |
| 88 | operations are serialized.\r |
| 89 | \r |
| 90 | If 8-bit I/O port operations are not supported, then ASSERT().\r |
| 91 | \r |
| 92 | @param Port The I/O port to write.\r |
| 93 | @param Value The value to write to the I/O port.\r |
| 94 | \r |
| 95 | @return The value written the I/O port.\r |
| 96 | \r |
| 97 | **/\r |
| 98 | UINT8\r |
| 99 | EFIAPI\r |
| 100 | IoWrite8 (\r |
| 101 | IN UINTN Port,\r |
| 102 | IN UINT8 Value\r |
| 103 | )\r |
| 104 | {\r |
| 105 | _ReadWriteBarrier ();\r |
| 106 | (UINT8)_outp ((UINT16)Port, Value);\r |
| 107 | _ReadWriteBarrier ();\r |
| 108 | return Value;\r |
| 109 | }\r |
| 110 | \r |
| 111 | /**\r |
| 112 | Reads a 16-bit I/O port.\r |
| 113 | \r |
| 114 | Reads the 16-bit I/O port specified by Port. The 16-bit read value is returned.\r |
| 115 | This function must guarantee that all I/O read and write operations are\r |
| 116 | serialized.\r |
| 117 | \r |
| 118 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
| 119 | \r |
| 120 | @param Port The I/O port to read.\r |
| 121 | \r |
| 122 | @return The value read.\r |
| 123 | \r |
| 124 | **/\r |
| 125 | UINT16\r |
| 126 | EFIAPI\r |
| 127 | IoRead16 (\r |
| 128 | IN UINTN Port\r |
| 129 | )\r |
| 130 | {\r |
| 131 | UINT16 Value;\r |
| 132 | \r |
| 133 | ASSERT ((Port & 1) == 0);\r |
| 134 | _ReadWriteBarrier ();\r |
| 135 | Value = _inpw ((UINT16)Port);\r |
| 136 | _ReadWriteBarrier ();\r |
| 137 | return Value;\r |
| 138 | }\r |
| 139 | \r |
| 140 | /**\r |
| 141 | Writes a 16-bit I/O port.\r |
| 142 | \r |
| 143 | Writes the 16-bit I/O port specified by Port with the value specified by Value\r |
| 144 | and returns Value. This function must guarantee that all I/O read and write\r |
| 145 | operations are serialized.\r |
| 146 | \r |
| 147 | If 16-bit I/O port operations are not supported, then ASSERT().\r |
| 148 | \r |
| 149 | @param Port The I/O port to write.\r |
| 150 | @param Value The value to write to the I/O port.\r |
| 151 | \r |
| 152 | @return The value written the I/O port.\r |
| 153 | \r |
| 154 | **/\r |
| 155 | UINT16\r |
| 156 | EFIAPI\r |
| 157 | IoWrite16 (\r |
| 158 | IN UINTN Port,\r |
| 159 | IN UINT16 Value\r |
| 160 | )\r |
| 161 | {\r |
| 162 | ASSERT ((Port & 1) == 0);\r |
| 163 | _ReadWriteBarrier ();\r |
| 164 | _outpw ((UINT16)Port, Value);\r |
| 165 | _ReadWriteBarrier ();\r |
| 166 | return Value;\r |
| 167 | }\r |
| 168 | \r |
| 169 | /**\r |
| 170 | Reads a 32-bit I/O port.\r |
| 171 | \r |
| 172 | Reads the 32-bit I/O port specified by Port. The 32-bit read value is returned.\r |
| 173 | This function must guarantee that all I/O read and write operations are\r |
| 174 | serialized.\r |
| 175 | \r |
| 176 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
| 177 | \r |
| 178 | @param Port The I/O port to read.\r |
| 179 | \r |
| 180 | @return The value read.\r |
| 181 | \r |
| 182 | **/\r |
| 183 | UINT32\r |
| 184 | EFIAPI\r |
| 185 | IoRead32 (\r |
| 186 | IN UINTN Port\r |
| 187 | )\r |
| 188 | {\r |
| 189 | UINT32 Value;\r |
| 190 | \r |
| 191 | ASSERT ((Port & 3) == 0);\r |
| 192 | _ReadWriteBarrier ();\r |
| 193 | Value = _inpd ((UINT16)Port);\r |
| 194 | _ReadWriteBarrier ();\r |
| 195 | return Value;\r |
| 196 | }\r |
| 197 | \r |
| 198 | /**\r |
| 199 | Writes a 32-bit I/O port.\r |
| 200 | \r |
| 201 | Writes the 32-bit I/O port specified by Port with the value specified by Value\r |
| 202 | and returns Value. This function must guarantee that all I/O read and write\r |
| 203 | operations are serialized.\r |
| 204 | \r |
| 205 | If 32-bit I/O port operations are not supported, then ASSERT().\r |
| 206 | \r |
| 207 | @param Port The I/O port to write.\r |
| 208 | @param Value The value to write to the I/O port.\r |
| 209 | \r |
| 210 | @return The value written the I/O port.\r |
| 211 | \r |
| 212 | **/\r |
| 213 | UINT32\r |
| 214 | EFIAPI\r |
| 215 | IoWrite32 (\r |
| 216 | IN UINTN Port,\r |
| 217 | IN UINT32 Value\r |
| 218 | )\r |
| 219 | {\r |
| 220 | ASSERT ((Port & 3) == 0);\r |
| 221 | _ReadWriteBarrier ();\r |
| 222 | _outpd ((UINT16)Port, Value);\r |
| 223 | _ReadWriteBarrier ();\r |
| 224 | return Value;\r |
| 225 | }\r |
| 226 | \r |
| 227 | \r |
| 228 | /**\r |
| 229 | Reads an 8-bit MMIO register.\r |
| 230 | \r |
| 231 | Reads the 8-bit MMIO register specified by Address. The 8-bit read value is\r |
| 232 | returned. This function must guarantee that all MMIO read and write\r |
| 233 | operations are serialized.\r |
| 234 | \r |
| 235 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
| 236 | \r |
| 237 | @param Address The MMIO register to read.\r |
| 238 | \r |
| 239 | @return The value read.\r |
| 240 | \r |
| 241 | **/\r |
| 242 | UINT8\r |
| 243 | EFIAPI\r |
| 244 | MmioRead8 (\r |
| 245 | IN UINTN Address\r |
| 246 | )\r |
| 247 | {\r |
| 248 | UINT8 Value;\r |
| 249 | \r |
| 250 | Value = *(volatile UINT8*)Address;\r |
| 251 | return Value;\r |
| 252 | }\r |
| 253 | \r |
| 254 | /**\r |
| 255 | Writes an 8-bit MMIO register.\r |
| 256 | \r |
| 257 | Writes the 8-bit MMIO register specified by Address with the value specified\r |
| 258 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| 259 | and write operations are serialized.\r |
| 260 | \r |
| 261 | If 8-bit MMIO register operations are not supported, then ASSERT().\r |
| 262 | \r |
| 263 | @param Address The MMIO register to write.\r |
| 264 | @param Value The value to write to the MMIO register.\r |
| 265 | \r |
| 266 | **/\r |
| 267 | UINT8\r |
| 268 | EFIAPI\r |
| 269 | MmioWrite8 (\r |
| 270 | IN UINTN Address,\r |
| 271 | IN UINT8 Value\r |
| 272 | )\r |
| 273 | {\r |
| 274 | return *(volatile UINT8*)Address = Value;\r |
| 275 | }\r |
| 276 | \r |
| 277 | /**\r |
| 278 | Reads a 16-bit MMIO register.\r |
| 279 | \r |
| 280 | Reads the 16-bit MMIO register specified by Address. The 16-bit read value is\r |
| 281 | returned. This function must guarantee that all MMIO read and write\r |
| 282 | operations are serialized.\r |
| 283 | \r |
| 284 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
| 285 | \r |
| 286 | @param Address The MMIO register to read.\r |
| 287 | \r |
| 288 | @return The value read.\r |
| 289 | \r |
| 290 | **/\r |
| 291 | UINT16\r |
| 292 | EFIAPI\r |
| 293 | MmioRead16 (\r |
| 294 | IN UINTN Address\r |
| 295 | )\r |
| 296 | {\r |
| 297 | UINT16 Value;\r |
| 298 | \r |
| 299 | ASSERT ((Address & 1) == 0);\r |
| 300 | Value = *(volatile UINT16*)Address;\r |
| 301 | return Value;\r |
| 302 | }\r |
| 303 | \r |
| 304 | /**\r |
| 305 | Writes a 16-bit MMIO register.\r |
| 306 | \r |
| 307 | Writes the 16-bit MMIO register specified by Address with the value specified\r |
| 308 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| 309 | and write operations are serialized.\r |
| 310 | \r |
| 311 | If 16-bit MMIO register operations are not supported, then ASSERT().\r |
| 312 | \r |
| 313 | @param Address The MMIO register to write.\r |
| 314 | @param Value The value to write to the MMIO register.\r |
| 315 | \r |
| 316 | **/\r |
| 317 | UINT16\r |
| 318 | EFIAPI\r |
| 319 | MmioWrite16 (\r |
| 320 | IN UINTN Address,\r |
| 321 | IN UINT16 Value\r |
| 322 | )\r |
| 323 | {\r |
| 324 | ASSERT ((Address & 1) == 0);\r |
| 325 | return *(volatile UINT16*)Address = Value;\r |
| 326 | }\r |
| 327 | \r |
| 328 | /**\r |
| 329 | Reads a 32-bit MMIO register.\r |
| 330 | \r |
| 331 | Reads the 32-bit MMIO register specified by Address. The 32-bit read value is\r |
| 332 | returned. This function must guarantee that all MMIO read and write\r |
| 333 | operations are serialized.\r |
| 334 | \r |
| 335 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
| 336 | \r |
| 337 | @param Address The MMIO register to read.\r |
| 338 | \r |
| 339 | @return The value read.\r |
| 340 | \r |
| 341 | **/\r |
| 342 | UINT32\r |
| 343 | EFIAPI\r |
| 344 | MmioRead32 (\r |
| 345 | IN UINTN Address\r |
| 346 | )\r |
| 347 | {\r |
| 348 | UINT32 Value;\r |
| 349 | \r |
| 350 | ASSERT ((Address & 3) == 0);\r |
| 351 | Value = *(volatile UINT32*)Address;\r |
| 352 | return Value;\r |
| 353 | }\r |
| 354 | \r |
| 355 | /**\r |
| 356 | Writes a 32-bit MMIO register.\r |
| 357 | \r |
| 358 | Writes the 32-bit MMIO register specified by Address with the value specified\r |
| 359 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| 360 | and write operations are serialized.\r |
| 361 | \r |
| 362 | If 32-bit MMIO register operations are not supported, then ASSERT().\r |
| 363 | \r |
| 364 | @param Address The MMIO register to write.\r |
| 365 | @param Value The value to write to the MMIO register.\r |
| 366 | \r |
| 367 | **/\r |
| 368 | UINT32\r |
| 369 | EFIAPI\r |
| 370 | MmioWrite32 (\r |
| 371 | IN UINTN Address,\r |
| 372 | IN UINT32 Value\r |
| 373 | )\r |
| 374 | {\r |
| 375 | ASSERT ((Address & 3) == 0);\r |
| 376 | return *(volatile UINT32*)Address = Value;\r |
| 377 | }\r |
| 378 | \r |
| 379 | /**\r |
| 380 | Reads a 64-bit MMIO register.\r |
| 381 | \r |
| 382 | Reads the 64-bit MMIO register specified by Address. The 64-bit read value is\r |
| 383 | returned. This function must guarantee that all MMIO read and write\r |
| 384 | operations are serialized.\r |
| 385 | \r |
| 386 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
| 387 | \r |
| 388 | @param Address The MMIO register to read.\r |
| 389 | \r |
| 390 | @return The value read.\r |
| 391 | \r |
| 392 | **/\r |
| 393 | UINT64\r |
| 394 | EFIAPI\r |
| 395 | MmioRead64 (\r |
| 396 | IN UINTN Address\r |
| 397 | )\r |
| 398 | {\r |
| 399 | UINT64 Value;\r |
| 400 | \r |
| 401 | ASSERT ((Address & 7) == 0);\r |
| 402 | Value = *(volatile UINT64*)Address;\r |
| 403 | return Value;\r |
| 404 | }\r |
| 405 | \r |
| 406 | /**\r |
| 407 | Writes a 64-bit MMIO register.\r |
| 408 | \r |
| 409 | Writes the 64-bit MMIO register specified by Address with the value specified\r |
| 410 | by Value and returns Value. This function must guarantee that all MMIO read\r |
| 411 | and write operations are serialized.\r |
| 412 | \r |
| 413 | If 64-bit MMIO register operations are not supported, then ASSERT().\r |
| 414 | \r |
| 415 | @param Address The MMIO register to write.\r |
| 416 | @param Value The value to write to the MMIO register.\r |
| 417 | \r |
| 418 | **/\r |
| 419 | UINT64\r |
| 420 | EFIAPI\r |
| 421 | MmioWrite64 (\r |
| 422 | IN UINTN Address,\r |
| 423 | IN UINT64 Value\r |
| 424 | )\r |
| 425 | {\r |
| 426 | ASSERT ((Address & 7) == 0);\r |
| 427 | return *(volatile UINT64*)Address = Value;\r |
| 428 | }\r |
| 429 | \r |