1 /** @file 2 Provides string functions, linked list functions, math functions, synchronization 3 functions, file path functions, and CPU architecture-specific functions. 4 5 Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR> 6 Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR> 7 This program and the accompanying materials 8 are licensed and made available under the terms and conditions of the BSD License 9 which accompanies this distribution. The full text of the license may be found at 10 http://opensource.org/licenses/bsd-license.php. 11 12 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS, 13 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED. 14 15 **/ 16 17 #ifndef __BASE_LIB__ 18 #define __BASE_LIB__ 19 20 // 21 // Definitions for architecture-specific types 22 // 23 #if defined (MDE_CPU_IA32) 24 /// 25 /// The IA-32 architecture context buffer used by SetJump() and LongJump(). 26 /// 27 typedef struct { 28 UINT32 Ebx; 29 UINT32 Esi; 30 UINT32 Edi; 31 UINT32 Ebp; 32 UINT32 Esp; 33 UINT32 Eip; 34 } BASE_LIBRARY_JUMP_BUFFER; 35 36 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 4 37 38 #endif // defined (MDE_CPU_IA32) 39 40 #if defined (MDE_CPU_IPF) 41 42 /// 43 /// The Itanium architecture context buffer used by SetJump() and LongJump(). 44 /// 45 typedef struct { 46 UINT64 F2[2]; 47 UINT64 F3[2]; 48 UINT64 F4[2]; 49 UINT64 F5[2]; 50 UINT64 F16[2]; 51 UINT64 F17[2]; 52 UINT64 F18[2]; 53 UINT64 F19[2]; 54 UINT64 F20[2]; 55 UINT64 F21[2]; 56 UINT64 F22[2]; 57 UINT64 F23[2]; 58 UINT64 F24[2]; 59 UINT64 F25[2]; 60 UINT64 F26[2]; 61 UINT64 F27[2]; 62 UINT64 F28[2]; 63 UINT64 F29[2]; 64 UINT64 F30[2]; 65 UINT64 F31[2]; 66 UINT64 R4; 67 UINT64 R5; 68 UINT64 R6; 69 UINT64 R7; 70 UINT64 SP; 71 UINT64 BR0; 72 UINT64 BR1; 73 UINT64 BR2; 74 UINT64 BR3; 75 UINT64 BR4; 76 UINT64 BR5; 77 UINT64 InitialUNAT; 78 UINT64 AfterSpillUNAT; 79 UINT64 PFS; 80 UINT64 BSP; 81 UINT64 Predicates; 82 UINT64 LoopCount; 83 UINT64 FPSR; 84 } BASE_LIBRARY_JUMP_BUFFER; 85 86 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 0x10 87 88 #endif // defined (MDE_CPU_IPF) 89 90 #if defined (MDE_CPU_X64) 91 /// 92 /// The x64 architecture context buffer used by SetJump() and LongJump(). 93 /// 94 typedef struct { 95 UINT64 Rbx; 96 UINT64 Rsp; 97 UINT64 Rbp; 98 UINT64 Rdi; 99 UINT64 Rsi; 100 UINT64 R12; 101 UINT64 R13; 102 UINT64 R14; 103 UINT64 R15; 104 UINT64 Rip; 105 UINT64 MxCsr; 106 UINT8 XmmBuffer[160]; ///< XMM6-XMM15. 107 } BASE_LIBRARY_JUMP_BUFFER; 108 109 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 110 111 #endif // defined (MDE_CPU_X64) 112 113 #if defined (MDE_CPU_EBC) 114 /// 115 /// The EBC context buffer used by SetJump() and LongJump(). 116 /// 117 typedef struct { 118 UINT64 R0; 119 UINT64 R1; 120 UINT64 R2; 121 UINT64 R3; 122 UINT64 IP; 123 } BASE_LIBRARY_JUMP_BUFFER; 124 125 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 126 127 #endif // defined (MDE_CPU_EBC) 128 129 #if defined (MDE_CPU_ARM) 130 131 typedef struct { 132 UINT32 R3; ///< A copy of R13. 133 UINT32 R4; 134 UINT32 R5; 135 UINT32 R6; 136 UINT32 R7; 137 UINT32 R8; 138 UINT32 R9; 139 UINT32 R10; 140 UINT32 R11; 141 UINT32 R12; 142 UINT32 R14; 143 } BASE_LIBRARY_JUMP_BUFFER; 144 145 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 4 146 147 #endif // defined (MDE_CPU_ARM) 148 149 #if defined (MDE_CPU_AARCH64) 150 typedef struct { 151 // GP regs 152 UINT64 X19; 153 UINT64 X20; 154 UINT64 X21; 155 UINT64 X22; 156 UINT64 X23; 157 UINT64 X24; 158 UINT64 X25; 159 UINT64 X26; 160 UINT64 X27; 161 UINT64 X28; 162 UINT64 FP; 163 UINT64 LR; 164 UINT64 IP0; 165 166 // FP regs 167 UINT64 D8; 168 UINT64 D9; 169 UINT64 D10; 170 UINT64 D11; 171 UINT64 D12; 172 UINT64 D13; 173 UINT64 D14; 174 UINT64 D15; 175 } BASE_LIBRARY_JUMP_BUFFER; 176 177 #define BASE_LIBRARY_JUMP_BUFFER_ALIGNMENT 8 178 179 #endif // defined (MDE_CPU_AARCH64) 180 181 182 // 183 // String Services 184 // 185 186 187 /** 188 Returns the length of a Null-terminated Unicode string. 189 190 This function is similar as strlen_s defined in C11. 191 192 If String is not aligned on a 16-bit boundary, then ASSERT(). 193 194 @param String A pointer to a Null-terminated Unicode string. 195 @param MaxSize The maximum number of Destination Unicode 196 char, including terminating null char. 197 198 @retval 0 If String is NULL. 199 @retval MaxSize If there is no null character in the first MaxSize characters of String. 200 @return The number of characters that percede the terminating null character. 201 202 **/ 203 UINTN 204 EFIAPI 205 StrnLenS ( 206 IN CONST CHAR16 *String, 207 IN UINTN MaxSize 208 ); 209 210 /** 211 Copies the string pointed to by Source (including the terminating null char) 212 to the array pointed to by Destination. 213 214 This function is similar as strcpy_s defined in C11. 215 216 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 217 If Source is not aligned on a 16-bit boundary, then ASSERT(). 218 If an error would be returned, then the function will also ASSERT(). 219 220 If an error is returned, then the Destination is unmodified. 221 222 @param Destination A pointer to a Null-terminated Unicode string. 223 @param DestMax The maximum number of Destination Unicode 224 char, including terminating null char. 225 @param Source A pointer to a Null-terminated Unicode string. 226 227 @retval RETURN_SUCCESS String is copied. 228 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source). 229 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 230 If Source is NULL. 231 If PcdMaximumUnicodeStringLength is not zero, 232 and DestMax is greater than 233 PcdMaximumUnicodeStringLength. 234 If DestMax is 0. 235 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 236 **/ 237 RETURN_STATUS 238 EFIAPI 239 StrCpyS ( 240 OUT CHAR16 *Destination, 241 IN UINTN DestMax, 242 IN CONST CHAR16 *Source 243 ); 244 245 /** 246 Copies not more than Length successive char from the string pointed to by 247 Source to the array pointed to by Destination. If no null char is copied from 248 Source, then Destination[Length] is always set to null. 249 250 This function is similar as strncpy_s defined in C11. 251 252 If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). 253 If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT(). 254 If an error would be returned, then the function will also ASSERT(). 255 256 If an error is returned, then the Destination is unmodified. 257 258 @param Destination A pointer to a Null-terminated Unicode string. 259 @param DestMax The maximum number of Destination Unicode 260 char, including terminating null char. 261 @param Source A pointer to a Null-terminated Unicode string. 262 @param Length The maximum number of Unicode characters to copy. 263 264 @retval RETURN_SUCCESS String is copied. 265 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than 266 MIN(StrLen(Source), Length). 267 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 268 If Source is NULL. 269 If PcdMaximumUnicodeStringLength is not zero, 270 and DestMax is greater than 271 PcdMaximumUnicodeStringLength. 272 If DestMax is 0. 273 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 274 **/ 275 RETURN_STATUS 276 EFIAPI 277 StrnCpyS ( 278 OUT CHAR16 *Destination, 279 IN UINTN DestMax, 280 IN CONST CHAR16 *Source, 281 IN UINTN Length 282 ); 283 284 /** 285 Appends a copy of the string pointed to by Source (including the terminating 286 null char) to the end of the string pointed to by Destination. 287 288 This function is similar as strcat_s defined in C11. 289 290 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 291 If Source is not aligned on a 16-bit boundary, then ASSERT(). 292 If an error would be returned, then the function will also ASSERT(). 293 294 If an error is returned, then the Destination is unmodified. 295 296 @param Destination A pointer to a Null-terminated Unicode string. 297 @param DestMax The maximum number of Destination Unicode 298 char, including terminating null char. 299 @param Source A pointer to a Null-terminated Unicode string. 300 301 @retval RETURN_SUCCESS String is appended. 302 @retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than 303 StrLen(Destination). 304 @retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT 305 greater than StrLen(Source). 306 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 307 If Source is NULL. 308 If PcdMaximumUnicodeStringLength is not zero, 309 and DestMax is greater than 310 PcdMaximumUnicodeStringLength. 311 If DestMax is 0. 312 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 313 **/ 314 RETURN_STATUS 315 EFIAPI 316 StrCatS ( 317 IN OUT CHAR16 *Destination, 318 IN UINTN DestMax, 319 IN CONST CHAR16 *Source 320 ); 321 322 /** 323 Appends not more than Length successive char from the string pointed to by 324 Source to the end of the string pointed to by Destination. If no null char is 325 copied from Source, then Destination[StrLen(Destination) + Length] is always 326 set to null. 327 328 This function is similar as strncat_s defined in C11. 329 330 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 331 If Source is not aligned on a 16-bit boundary, then ASSERT(). 332 If an error would be returned, then the function will also ASSERT(). 333 334 If an error is returned, then the Destination is unmodified. 335 336 @param Destination A pointer to a Null-terminated Unicode string. 337 @param DestMax The maximum number of Destination Unicode 338 char, including terminating null char. 339 @param Source A pointer to a Null-terminated Unicode string. 340 @param Length The maximum number of Unicode characters to copy. 341 342 @retval RETURN_SUCCESS String is appended. 343 @retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than 344 StrLen(Destination). 345 @retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT 346 greater than MIN(StrLen(Source), Length). 347 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 348 If Source is NULL. 349 If PcdMaximumUnicodeStringLength is not zero, 350 and DestMax is greater than 351 PcdMaximumUnicodeStringLength. 352 If DestMax is 0. 353 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 354 **/ 355 RETURN_STATUS 356 EFIAPI 357 StrnCatS ( 358 IN OUT CHAR16 *Destination, 359 IN UINTN DestMax, 360 IN CONST CHAR16 *Source, 361 IN UINTN Length 362 ); 363 364 /** 365 Returns the length of a Null-terminated Ascii string. 366 367 This function is similar as strlen_s defined in C11. 368 369 @param String A pointer to a Null-terminated Ascii string. 370 @param MaxSize The maximum number of Destination Ascii 371 char, including terminating null char. 372 373 @retval 0 If String is NULL. 374 @retval MaxSize If there is no null character in the first MaxSize characters of String. 375 @return The number of characters that percede the terminating null character. 376 377 **/ 378 UINTN 379 EFIAPI 380 AsciiStrnLenS ( 381 IN CONST CHAR8 *String, 382 IN UINTN MaxSize 383 ); 384 385 /** 386 Copies the string pointed to by Source (including the terminating null char) 387 to the array pointed to by Destination. 388 389 This function is similar as strcpy_s defined in C11. 390 391 If an error would be returned, then the function will also ASSERT(). 392 393 If an error is returned, then the Destination is unmodified. 394 395 @param Destination A pointer to a Null-terminated Ascii string. 396 @param DestMax The maximum number of Destination Ascii 397 char, including terminating null char. 398 @param Source A pointer to a Null-terminated Ascii string. 399 400 @retval RETURN_SUCCESS String is copied. 401 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source). 402 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 403 If Source is NULL. 404 If PcdMaximumAsciiStringLength is not zero, 405 and DestMax is greater than 406 PcdMaximumAsciiStringLength. 407 If DestMax is 0. 408 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 409 **/ 410 RETURN_STATUS 411 EFIAPI 412 AsciiStrCpyS ( 413 OUT CHAR8 *Destination, 414 IN UINTN DestMax, 415 IN CONST CHAR8 *Source 416 ); 417 418 /** 419 Copies not more than Length successive char from the string pointed to by 420 Source to the array pointed to by Destination. If no null char is copied from 421 Source, then Destination[Length] is always set to null. 422 423 This function is similar as strncpy_s defined in C11. 424 425 If an error would be returned, then the function will also ASSERT(). 426 427 If an error is returned, then the Destination is unmodified. 428 429 @param Destination A pointer to a Null-terminated Ascii string. 430 @param DestMax The maximum number of Destination Ascii 431 char, including terminating null char. 432 @param Source A pointer to a Null-terminated Ascii string. 433 @param Length The maximum number of Ascii characters to copy. 434 435 @retval RETURN_SUCCESS String is copied. 436 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than 437 MIN(StrLen(Source), Length). 438 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 439 If Source is NULL. 440 If PcdMaximumAsciiStringLength is not zero, 441 and DestMax is greater than 442 PcdMaximumAsciiStringLength. 443 If DestMax is 0. 444 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 445 **/ 446 RETURN_STATUS 447 EFIAPI 448 AsciiStrnCpyS ( 449 OUT CHAR8 *Destination, 450 IN UINTN DestMax, 451 IN CONST CHAR8 *Source, 452 IN UINTN Length 453 ); 454 455 /** 456 Appends a copy of the string pointed to by Source (including the terminating 457 null char) to the end of the string pointed to by Destination. 458 459 This function is similar as strcat_s defined in C11. 460 461 If an error would be returned, then the function will also ASSERT(). 462 463 If an error is returned, then the Destination is unmodified. 464 465 @param Destination A pointer to a Null-terminated Ascii string. 466 @param DestMax The maximum number of Destination Ascii 467 char, including terminating null char. 468 @param Source A pointer to a Null-terminated Ascii string. 469 470 @retval RETURN_SUCCESS String is appended. 471 @retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than 472 StrLen(Destination). 473 @retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT 474 greater than StrLen(Source). 475 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 476 If Source is NULL. 477 If PcdMaximumAsciiStringLength is not zero, 478 and DestMax is greater than 479 PcdMaximumAsciiStringLength. 480 If DestMax is 0. 481 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 482 **/ 483 RETURN_STATUS 484 EFIAPI 485 AsciiStrCatS ( 486 IN OUT CHAR8 *Destination, 487 IN UINTN DestMax, 488 IN CONST CHAR8 *Source 489 ); 490 491 /** 492 Appends not more than Length successive char from the string pointed to by 493 Source to the end of the string pointed to by Destination. If no null char is 494 copied from Source, then Destination[StrLen(Destination) + Length] is always 495 set to null. 496 497 This function is similar as strncat_s defined in C11. 498 499 If an error would be returned, then the function will also ASSERT(). 500 501 If an error is returned, then the Destination is unmodified. 502 503 @param Destination A pointer to a Null-terminated Ascii string. 504 @param DestMax The maximum number of Destination Ascii 505 char, including terminating null char. 506 @param Source A pointer to a Null-terminated Ascii string. 507 @param Length The maximum number of Ascii characters to copy. 508 509 @retval RETURN_SUCCESS String is appended. 510 @retval RETURN_BAD_BUFFER_SIZE If DestMax is NOT greater than 511 StrLen(Destination). 512 @retval RETURN_BUFFER_TOO_SMALL If (DestMax - StrLen(Destination)) is NOT 513 greater than MIN(StrLen(Source), Length). 514 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 515 If Source is NULL. 516 If PcdMaximumAsciiStringLength is not zero, 517 and DestMax is greater than 518 PcdMaximumAsciiStringLength. 519 If DestMax is 0. 520 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 521 **/ 522 RETURN_STATUS 523 EFIAPI 524 AsciiStrnCatS ( 525 IN OUT CHAR8 *Destination, 526 IN UINTN DestMax, 527 IN CONST CHAR8 *Source, 528 IN UINTN Length 529 ); 530 531 532 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 533 534 /** 535 [ATTENTION] This function is deprecated for security reason. 536 537 Copies one Null-terminated Unicode string to another Null-terminated Unicode 538 string and returns the new Unicode string. 539 540 This function copies the contents of the Unicode string Source to the Unicode 541 string Destination, and returns Destination. If Source and Destination 542 overlap, then the results are undefined. 543 544 If Destination is NULL, then ASSERT(). 545 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 546 If Source is NULL, then ASSERT(). 547 If Source is not aligned on a 16-bit boundary, then ASSERT(). 548 If Source and Destination overlap, then ASSERT(). 549 If PcdMaximumUnicodeStringLength is not zero, and Source contains more than 550 PcdMaximumUnicodeStringLength Unicode characters not including the 551 Null-terminator, then ASSERT(). 552 553 @param Destination The pointer to a Null-terminated Unicode string. 554 @param Source The pointer to a Null-terminated Unicode string. 555 556 @return Destination. 557 558 **/ 559 CHAR16 * 560 EFIAPI 561 StrCpy ( 562 OUT CHAR16 *Destination, 563 IN CONST CHAR16 *Source 564 ); 565 566 567 /** 568 [ATTENTION] This function is deprecated for security reason. 569 570 Copies up to a specified length from one Null-terminated Unicode string to 571 another Null-terminated Unicode string and returns the new Unicode string. 572 573 This function copies the contents of the Unicode string Source to the Unicode 574 string Destination, and returns Destination. At most, Length Unicode 575 characters are copied from Source to Destination. If Length is 0, then 576 Destination is returned unmodified. If Length is greater that the number of 577 Unicode characters in Source, then Destination is padded with Null Unicode 578 characters. If Source and Destination overlap, then the results are 579 undefined. 580 581 If Length > 0 and Destination is NULL, then ASSERT(). 582 If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). 583 If Length > 0 and Source is NULL, then ASSERT(). 584 If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT(). 585 If Source and Destination overlap, then ASSERT(). 586 If PcdMaximumUnicodeStringLength is not zero, and Length is greater than 587 PcdMaximumUnicodeStringLength, then ASSERT(). 588 If PcdMaximumUnicodeStringLength is not zero, and Source contains more than 589 PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, 590 then ASSERT(). 591 592 @param Destination The pointer to a Null-terminated Unicode string. 593 @param Source The pointer to a Null-terminated Unicode string. 594 @param Length The maximum number of Unicode characters to copy. 595 596 @return Destination. 597 598 **/ 599 CHAR16 * 600 EFIAPI 601 StrnCpy ( 602 OUT CHAR16 *Destination, 603 IN CONST CHAR16 *Source, 604 IN UINTN Length 605 ); 606 #endif 607 608 /** 609 Returns the length of a Null-terminated Unicode string. 610 611 This function returns the number of Unicode characters in the Null-terminated 612 Unicode string specified by String. 613 614 If String is NULL, then ASSERT(). 615 If String is not aligned on a 16-bit boundary, then ASSERT(). 616 If PcdMaximumUnicodeStringLength is not zero, and String contains more than 617 PcdMaximumUnicodeStringLength Unicode characters not including the 618 Null-terminator, then ASSERT(). 619 620 @param String Pointer to a Null-terminated Unicode string. 621 622 @return The length of String. 623 624 **/ 625 UINTN 626 EFIAPI 627 StrLen ( 628 IN CONST CHAR16 *String 629 ); 630 631 632 /** 633 Returns the size of a Null-terminated Unicode string in bytes, including the 634 Null terminator. 635 636 This function returns the size, in bytes, of the Null-terminated Unicode string 637 specified by String. 638 639 If String is NULL, then ASSERT(). 640 If String is not aligned on a 16-bit boundary, then ASSERT(). 641 If PcdMaximumUnicodeStringLength is not zero, and String contains more than 642 PcdMaximumUnicodeStringLength Unicode characters not including the 643 Null-terminator, then ASSERT(). 644 645 @param String The pointer to a Null-terminated Unicode string. 646 647 @return The size of String. 648 649 **/ 650 UINTN 651 EFIAPI 652 StrSize ( 653 IN CONST CHAR16 *String 654 ); 655 656 657 /** 658 Compares two Null-terminated Unicode strings, and returns the difference 659 between the first mismatched Unicode characters. 660 661 This function compares the Null-terminated Unicode string FirstString to the 662 Null-terminated Unicode string SecondString. If FirstString is identical to 663 SecondString, then 0 is returned. Otherwise, the value returned is the first 664 mismatched Unicode character in SecondString subtracted from the first 665 mismatched Unicode character in FirstString. 666 667 If FirstString is NULL, then ASSERT(). 668 If FirstString is not aligned on a 16-bit boundary, then ASSERT(). 669 If SecondString is NULL, then ASSERT(). 670 If SecondString is not aligned on a 16-bit boundary, then ASSERT(). 671 If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more 672 than PcdMaximumUnicodeStringLength Unicode characters not including the 673 Null-terminator, then ASSERT(). 674 If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more 675 than PcdMaximumUnicodeStringLength Unicode characters, not including the 676 Null-terminator, then ASSERT(). 677 678 @param FirstString The pointer to a Null-terminated Unicode string. 679 @param SecondString The pointer to a Null-terminated Unicode string. 680 681 @retval 0 FirstString is identical to SecondString. 682 @return others FirstString is not identical to SecondString. 683 684 **/ 685 INTN 686 EFIAPI 687 StrCmp ( 688 IN CONST CHAR16 *FirstString, 689 IN CONST CHAR16 *SecondString 690 ); 691 692 693 /** 694 Compares up to a specified length the contents of two Null-terminated Unicode strings, 695 and returns the difference between the first mismatched Unicode characters. 696 697 This function compares the Null-terminated Unicode string FirstString to the 698 Null-terminated Unicode string SecondString. At most, Length Unicode 699 characters will be compared. If Length is 0, then 0 is returned. If 700 FirstString is identical to SecondString, then 0 is returned. Otherwise, the 701 value returned is the first mismatched Unicode character in SecondString 702 subtracted from the first mismatched Unicode character in FirstString. 703 704 If Length > 0 and FirstString is NULL, then ASSERT(). 705 If Length > 0 and FirstString is not aligned on a 16-bit boundary, then ASSERT(). 706 If Length > 0 and SecondString is NULL, then ASSERT(). 707 If Length > 0 and SecondString is not aligned on a 16-bit boundary, then ASSERT(). 708 If PcdMaximumUnicodeStringLength is not zero, and Length is greater than 709 PcdMaximumUnicodeStringLength, then ASSERT(). 710 If PcdMaximumUnicodeStringLength is not zero, and FirstString contains more than 711 PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, 712 then ASSERT(). 713 If PcdMaximumUnicodeStringLength is not zero, and SecondString contains more than 714 PcdMaximumUnicodeStringLength Unicode characters, not including the Null-terminator, 715 then ASSERT(). 716 717 @param FirstString The pointer to a Null-terminated Unicode string. 718 @param SecondString The pointer to a Null-terminated Unicode string. 719 @param Length The maximum number of Unicode characters to compare. 720 721 @retval 0 FirstString is identical to SecondString. 722 @return others FirstString is not identical to SecondString. 723 724 **/ 725 INTN 726 EFIAPI 727 StrnCmp ( 728 IN CONST CHAR16 *FirstString, 729 IN CONST CHAR16 *SecondString, 730 IN UINTN Length 731 ); 732 733 734 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 735 736 /** 737 [ATTENTION] This function is deprecated for security reason. 738 739 Concatenates one Null-terminated Unicode string to another Null-terminated 740 Unicode string, and returns the concatenated Unicode string. 741 742 This function concatenates two Null-terminated Unicode strings. The contents 743 of Null-terminated Unicode string Source are concatenated to the end of 744 Null-terminated Unicode string Destination. The Null-terminated concatenated 745 Unicode String is returned. If Source and Destination overlap, then the 746 results are undefined. 747 748 If Destination is NULL, then ASSERT(). 749 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 750 If Source is NULL, then ASSERT(). 751 If Source is not aligned on a 16-bit boundary, then ASSERT(). 752 If Source and Destination overlap, then ASSERT(). 753 If PcdMaximumUnicodeStringLength is not zero, and Destination contains more 754 than PcdMaximumUnicodeStringLength Unicode characters, not including the 755 Null-terminator, then ASSERT(). 756 If PcdMaximumUnicodeStringLength is not zero, and Source contains more than 757 PcdMaximumUnicodeStringLength Unicode characters, not including the 758 Null-terminator, then ASSERT(). 759 If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination 760 and Source results in a Unicode string with more than 761 PcdMaximumUnicodeStringLength Unicode characters, not including the 762 Null-terminator, then ASSERT(). 763 764 @param Destination The pointer to a Null-terminated Unicode string. 765 @param Source The pointer to a Null-terminated Unicode string. 766 767 @return Destination. 768 769 **/ 770 CHAR16 * 771 EFIAPI 772 StrCat ( 773 IN OUT CHAR16 *Destination, 774 IN CONST CHAR16 *Source 775 ); 776 777 778 /** 779 [ATTENTION] This function is deprecated for security reason. 780 781 Concatenates up to a specified length one Null-terminated Unicode to the end 782 of another Null-terminated Unicode string, and returns the concatenated 783 Unicode string. 784 785 This function concatenates two Null-terminated Unicode strings. The contents 786 of Null-terminated Unicode string Source are concatenated to the end of 787 Null-terminated Unicode string Destination, and Destination is returned. At 788 most, Length Unicode characters are concatenated from Source to the end of 789 Destination, and Destination is always Null-terminated. If Length is 0, then 790 Destination is returned unmodified. If Source and Destination overlap, then 791 the results are undefined. 792 793 If Destination is NULL, then ASSERT(). 794 If Length > 0 and Destination is not aligned on a 16-bit boundary, then ASSERT(). 795 If Length > 0 and Source is NULL, then ASSERT(). 796 If Length > 0 and Source is not aligned on a 16-bit boundary, then ASSERT(). 797 If Source and Destination overlap, then ASSERT(). 798 If PcdMaximumUnicodeStringLength is not zero, and Length is greater than 799 PcdMaximumUnicodeStringLength, then ASSERT(). 800 If PcdMaximumUnicodeStringLength is not zero, and Destination contains more 801 than PcdMaximumUnicodeStringLength Unicode characters, not including the 802 Null-terminator, then ASSERT(). 803 If PcdMaximumUnicodeStringLength is not zero, and Source contains more than 804 PcdMaximumUnicodeStringLength Unicode characters, not including the 805 Null-terminator, then ASSERT(). 806 If PcdMaximumUnicodeStringLength is not zero, and concatenating Destination 807 and Source results in a Unicode string with more than PcdMaximumUnicodeStringLength 808 Unicode characters, not including the Null-terminator, then ASSERT(). 809 810 @param Destination The pointer to a Null-terminated Unicode string. 811 @param Source The pointer to a Null-terminated Unicode string. 812 @param Length The maximum number of Unicode characters to concatenate from 813 Source. 814 815 @return Destination. 816 817 **/ 818 CHAR16 * 819 EFIAPI 820 StrnCat ( 821 IN OUT CHAR16 *Destination, 822 IN CONST CHAR16 *Source, 823 IN UINTN Length 824 ); 825 #endif 826 827 /** 828 Returns the first occurrence of a Null-terminated Unicode sub-string 829 in a Null-terminated Unicode string. 830 831 This function scans the contents of the Null-terminated Unicode string 832 specified by String and returns the first occurrence of SearchString. 833 If SearchString is not found in String, then NULL is returned. If 834 the length of SearchString is zero, then String is returned. 835 836 If String is NULL, then ASSERT(). 837 If String is not aligned on a 16-bit boundary, then ASSERT(). 838 If SearchString is NULL, then ASSERT(). 839 If SearchString is not aligned on a 16-bit boundary, then ASSERT(). 840 841 If PcdMaximumUnicodeStringLength is not zero, and SearchString 842 or String contains more than PcdMaximumUnicodeStringLength Unicode 843 characters, not including the Null-terminator, then ASSERT(). 844 845 @param String The pointer to a Null-terminated Unicode string. 846 @param SearchString The pointer to a Null-terminated Unicode string to search for. 847 848 @retval NULL If the SearchString does not appear in String. 849 @return others If there is a match. 850 851 **/ 852 CHAR16 * 853 EFIAPI 854 StrStr ( 855 IN CONST CHAR16 *String, 856 IN CONST CHAR16 *SearchString 857 ); 858 859 /** 860 Convert a Null-terminated Unicode decimal string to a value of 861 type UINTN. 862 863 This function returns a value of type UINTN by interpreting the contents 864 of the Unicode string specified by String as a decimal number. The format 865 of the input Unicode string String is: 866 867 [spaces] [decimal digits]. 868 869 The valid decimal digit character is in the range [0-9]. The 870 function will ignore the pad space, which includes spaces or 871 tab characters, before [decimal digits]. The running zero in the 872 beginning of [decimal digits] will be ignored. Then, the function 873 stops at the first character that is a not a valid decimal character 874 or a Null-terminator, whichever one comes first. 875 876 If String is NULL, then ASSERT(). 877 If String is not aligned in a 16-bit boundary, then ASSERT(). 878 If String has only pad spaces, then 0 is returned. 879 If String has no pad spaces or valid decimal digits, 880 then 0 is returned. 881 If the number represented by String overflows according 882 to the range defined by UINTN, then ASSERT(). 883 884 If PcdMaximumUnicodeStringLength is not zero, and String contains 885 more than PcdMaximumUnicodeStringLength Unicode characters not including 886 the Null-terminator, then ASSERT(). 887 888 @param String The pointer to a Null-terminated Unicode string. 889 890 @retval Value translated from String. 891 892 **/ 893 UINTN 894 EFIAPI 895 StrDecimalToUintn ( 896 IN CONST CHAR16 *String 897 ); 898 899 /** 900 Convert a Null-terminated Unicode decimal string to a value of 901 type UINT64. 902 903 This function returns a value of type UINT64 by interpreting the contents 904 of the Unicode string specified by String as a decimal number. The format 905 of the input Unicode string String is: 906 907 [spaces] [decimal digits]. 908 909 The valid decimal digit character is in the range [0-9]. The 910 function will ignore the pad space, which includes spaces or 911 tab characters, before [decimal digits]. The running zero in the 912 beginning of [decimal digits] will be ignored. Then, the function 913 stops at the first character that is a not a valid decimal character 914 or a Null-terminator, whichever one comes first. 915 916 If String is NULL, then ASSERT(). 917 If String is not aligned in a 16-bit boundary, then ASSERT(). 918 If String has only pad spaces, then 0 is returned. 919 If String has no pad spaces or valid decimal digits, 920 then 0 is returned. 921 If the number represented by String overflows according 922 to the range defined by UINT64, then ASSERT(). 923 924 If PcdMaximumUnicodeStringLength is not zero, and String contains 925 more than PcdMaximumUnicodeStringLength Unicode characters not including 926 the Null-terminator, then ASSERT(). 927 928 @param String The pointer to a Null-terminated Unicode string. 929 930 @retval Value translated from String. 931 932 **/ 933 UINT64 934 EFIAPI 935 StrDecimalToUint64 ( 936 IN CONST CHAR16 *String 937 ); 938 939 940 /** 941 Convert a Null-terminated Unicode hexadecimal string to a value of type UINTN. 942 943 This function returns a value of type UINTN by interpreting the contents 944 of the Unicode string specified by String as a hexadecimal number. 945 The format of the input Unicode string String is: 946 947 [spaces][zeros][x][hexadecimal digits]. 948 949 The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. 950 The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. 951 If "x" appears in the input string, it must be prefixed with at least one 0. 952 The function will ignore the pad space, which includes spaces or tab characters, 953 before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or 954 [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the 955 first valid hexadecimal digit. Then, the function stops at the first character 956 that is a not a valid hexadecimal character or NULL, whichever one comes first. 957 958 If String is NULL, then ASSERT(). 959 If String is not aligned in a 16-bit boundary, then ASSERT(). 960 If String has only pad spaces, then zero is returned. 961 If String has no leading pad spaces, leading zeros or valid hexadecimal digits, 962 then zero is returned. 963 If the number represented by String overflows according to the range defined by 964 UINTN, then ASSERT(). 965 966 If PcdMaximumUnicodeStringLength is not zero, and String contains more than 967 PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, 968 then ASSERT(). 969 970 @param String The pointer to a Null-terminated Unicode string. 971 972 @retval Value translated from String. 973 974 **/ 975 UINTN 976 EFIAPI 977 StrHexToUintn ( 978 IN CONST CHAR16 *String 979 ); 980 981 982 /** 983 Convert a Null-terminated Unicode hexadecimal string to a value of type UINT64. 984 985 This function returns a value of type UINT64 by interpreting the contents 986 of the Unicode string specified by String as a hexadecimal number. 987 The format of the input Unicode string String is 988 989 [spaces][zeros][x][hexadecimal digits]. 990 991 The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. 992 The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. 993 If "x" appears in the input string, it must be prefixed with at least one 0. 994 The function will ignore the pad space, which includes spaces or tab characters, 995 before [zeros], [x] or [hexadecimal digit]. The running zero before [x] or 996 [hexadecimal digit] will be ignored. Then, the decoding starts after [x] or the 997 first valid hexadecimal digit. Then, the function stops at the first character that is 998 a not a valid hexadecimal character or NULL, whichever one comes first. 999 1000 If String is NULL, then ASSERT(). 1001 If String is not aligned in a 16-bit boundary, then ASSERT(). 1002 If String has only pad spaces, then zero is returned. 1003 If String has no leading pad spaces, leading zeros or valid hexadecimal digits, 1004 then zero is returned. 1005 If the number represented by String overflows according to the range defined by 1006 UINT64, then ASSERT(). 1007 1008 If PcdMaximumUnicodeStringLength is not zero, and String contains more than 1009 PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, 1010 then ASSERT(). 1011 1012 @param String The pointer to a Null-terminated Unicode string. 1013 1014 @retval Value translated from String. 1015 1016 **/ 1017 UINT64 1018 EFIAPI 1019 StrHexToUint64 ( 1020 IN CONST CHAR16 *String 1021 ); 1022 1023 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 1024 1025 /** 1026 [ATTENTION] This function is deprecated for security reason. 1027 1028 Convert a Null-terminated Unicode string to a Null-terminated 1029 ASCII string and returns the ASCII string. 1030 1031 This function converts the content of the Unicode string Source 1032 to the ASCII string Destination by copying the lower 8 bits of 1033 each Unicode character. It returns Destination. 1034 1035 The caller is responsible to make sure Destination points to a buffer with size 1036 equal or greater than ((StrLen (Source) + 1) * sizeof (CHAR8)) in bytes. 1037 1038 If any Unicode characters in Source contain non-zero value in 1039 the upper 8 bits, then ASSERT(). 1040 1041 If Destination is NULL, then ASSERT(). 1042 If Source is NULL, then ASSERT(). 1043 If Source is not aligned on a 16-bit boundary, then ASSERT(). 1044 If Source and Destination overlap, then ASSERT(). 1045 1046 If PcdMaximumUnicodeStringLength is not zero, and Source contains 1047 more than PcdMaximumUnicodeStringLength Unicode characters not including 1048 the Null-terminator, then ASSERT(). 1049 1050 If PcdMaximumAsciiStringLength is not zero, and Source contains more 1051 than PcdMaximumAsciiStringLength Unicode characters not including the 1052 Null-terminator, then ASSERT(). 1053 1054 @param Source The pointer to a Null-terminated Unicode string. 1055 @param Destination The pointer to a Null-terminated ASCII string. 1056 1057 @return Destination. 1058 1059 **/ 1060 CHAR8 * 1061 EFIAPI 1062 UnicodeStrToAsciiStr ( 1063 IN CONST CHAR16 *Source, 1064 OUT CHAR8 *Destination 1065 ); 1066 1067 #endif 1068 1069 /** 1070 Convert a Null-terminated Unicode string to a Null-terminated 1071 ASCII string. 1072 1073 This function is similar to AsciiStrCpyS. 1074 1075 This function converts the content of the Unicode string Source 1076 to the ASCII string Destination by copying the lower 8 bits of 1077 each Unicode character. The function terminates the ASCII string 1078 Destination by appending a Null-terminator character at the end. 1079 1080 The caller is responsible to make sure Destination points to a buffer with size 1081 equal or greater than ((StrLen (Source) + 1) * sizeof (CHAR8)) in bytes. 1082 1083 If any Unicode characters in Source contain non-zero value in 1084 the upper 8 bits, then ASSERT(). 1085 1086 If Source is not aligned on a 16-bit boundary, then ASSERT(). 1087 If an error would be returned, then the function will also ASSERT(). 1088 1089 If an error is returned, then the Destination is unmodified. 1090 1091 @param Source The pointer to a Null-terminated Unicode string. 1092 @param Destination The pointer to a Null-terminated ASCII string. 1093 @param DestMax The maximum number of Destination Ascii 1094 char, including terminating null char. 1095 1096 @retval RETURN_SUCCESS String is converted. 1097 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source). 1098 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 1099 If Source is NULL. 1100 If PcdMaximumAsciiStringLength is not zero, 1101 and DestMax is greater than 1102 PcdMaximumAsciiStringLength. 1103 If PcdMaximumUnicodeStringLength is not zero, 1104 and DestMax is greater than 1105 PcdMaximumUnicodeStringLength. 1106 If DestMax is 0. 1107 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 1108 1109 **/ 1110 RETURN_STATUS 1111 EFIAPI 1112 UnicodeStrToAsciiStrS ( 1113 IN CONST CHAR16 *Source, 1114 OUT CHAR8 *Destination, 1115 IN UINTN DestMax 1116 ); 1117 1118 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 1119 1120 /** 1121 [ATTENTION] This function is deprecated for security reason. 1122 1123 Copies one Null-terminated ASCII string to another Null-terminated ASCII 1124 string and returns the new ASCII string. 1125 1126 This function copies the contents of the ASCII string Source to the ASCII 1127 string Destination, and returns Destination. If Source and Destination 1128 overlap, then the results are undefined. 1129 1130 If Destination is NULL, then ASSERT(). 1131 If Source is NULL, then ASSERT(). 1132 If Source and Destination overlap, then ASSERT(). 1133 If PcdMaximumAsciiStringLength is not zero and Source contains more than 1134 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1135 then ASSERT(). 1136 1137 @param Destination The pointer to a Null-terminated ASCII string. 1138 @param Source The pointer to a Null-terminated ASCII string. 1139 1140 @return Destination 1141 1142 **/ 1143 CHAR8 * 1144 EFIAPI 1145 AsciiStrCpy ( 1146 OUT CHAR8 *Destination, 1147 IN CONST CHAR8 *Source 1148 ); 1149 1150 1151 /** 1152 [ATTENTION] This function is deprecated for security reason. 1153 1154 Copies up to a specified length one Null-terminated ASCII string to another 1155 Null-terminated ASCII string and returns the new ASCII string. 1156 1157 This function copies the contents of the ASCII string Source to the ASCII 1158 string Destination, and returns Destination. At most, Length ASCII characters 1159 are copied from Source to Destination. If Length is 0, then Destination is 1160 returned unmodified. If Length is greater that the number of ASCII characters 1161 in Source, then Destination is padded with Null ASCII characters. If Source 1162 and Destination overlap, then the results are undefined. 1163 1164 If Destination is NULL, then ASSERT(). 1165 If Source is NULL, then ASSERT(). 1166 If Source and Destination overlap, then ASSERT(). 1167 If PcdMaximumAsciiStringLength is not zero, and Length is greater than 1168 PcdMaximumAsciiStringLength, then ASSERT(). 1169 If PcdMaximumAsciiStringLength is not zero, and Source contains more than 1170 PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, 1171 then ASSERT(). 1172 1173 @param Destination The pointer to a Null-terminated ASCII string. 1174 @param Source The pointer to a Null-terminated ASCII string. 1175 @param Length The maximum number of ASCII characters to copy. 1176 1177 @return Destination 1178 1179 **/ 1180 CHAR8 * 1181 EFIAPI 1182 AsciiStrnCpy ( 1183 OUT CHAR8 *Destination, 1184 IN CONST CHAR8 *Source, 1185 IN UINTN Length 1186 ); 1187 #endif 1188 1189 /** 1190 Returns the length of a Null-terminated ASCII string. 1191 1192 This function returns the number of ASCII characters in the Null-terminated 1193 ASCII string specified by String. 1194 1195 If Length > 0 and Destination is NULL, then ASSERT(). 1196 If Length > 0 and Source is NULL, then ASSERT(). 1197 If PcdMaximumAsciiStringLength is not zero and String contains more than 1198 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1199 then ASSERT(). 1200 1201 @param String The pointer to a Null-terminated ASCII string. 1202 1203 @return The length of String. 1204 1205 **/ 1206 UINTN 1207 EFIAPI 1208 AsciiStrLen ( 1209 IN CONST CHAR8 *String 1210 ); 1211 1212 1213 /** 1214 Returns the size of a Null-terminated ASCII string in bytes, including the 1215 Null terminator. 1216 1217 This function returns the size, in bytes, of the Null-terminated ASCII string 1218 specified by String. 1219 1220 If String is NULL, then ASSERT(). 1221 If PcdMaximumAsciiStringLength is not zero and String contains more than 1222 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1223 then ASSERT(). 1224 1225 @param String The pointer to a Null-terminated ASCII string. 1226 1227 @return The size of String. 1228 1229 **/ 1230 UINTN 1231 EFIAPI 1232 AsciiStrSize ( 1233 IN CONST CHAR8 *String 1234 ); 1235 1236 1237 /** 1238 Compares two Null-terminated ASCII strings, and returns the difference 1239 between the first mismatched ASCII characters. 1240 1241 This function compares the Null-terminated ASCII string FirstString to the 1242 Null-terminated ASCII string SecondString. If FirstString is identical to 1243 SecondString, then 0 is returned. Otherwise, the value returned is the first 1244 mismatched ASCII character in SecondString subtracted from the first 1245 mismatched ASCII character in FirstString. 1246 1247 If FirstString is NULL, then ASSERT(). 1248 If SecondString is NULL, then ASSERT(). 1249 If PcdMaximumAsciiStringLength is not zero and FirstString contains more than 1250 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1251 then ASSERT(). 1252 If PcdMaximumAsciiStringLength is not zero and SecondString contains more 1253 than PcdMaximumAsciiStringLength ASCII characters not including the 1254 Null-terminator, then ASSERT(). 1255 1256 @param FirstString The pointer to a Null-terminated ASCII string. 1257 @param SecondString The pointer to a Null-terminated ASCII string. 1258 1259 @retval ==0 FirstString is identical to SecondString. 1260 @retval !=0 FirstString is not identical to SecondString. 1261 1262 **/ 1263 INTN 1264 EFIAPI 1265 AsciiStrCmp ( 1266 IN CONST CHAR8 *FirstString, 1267 IN CONST CHAR8 *SecondString 1268 ); 1269 1270 1271 /** 1272 Performs a case insensitive comparison of two Null-terminated ASCII strings, 1273 and returns the difference between the first mismatched ASCII characters. 1274 1275 This function performs a case insensitive comparison of the Null-terminated 1276 ASCII string FirstString to the Null-terminated ASCII string SecondString. If 1277 FirstString is identical to SecondString, then 0 is returned. Otherwise, the 1278 value returned is the first mismatched lower case ASCII character in 1279 SecondString subtracted from the first mismatched lower case ASCII character 1280 in FirstString. 1281 1282 If FirstString is NULL, then ASSERT(). 1283 If SecondString is NULL, then ASSERT(). 1284 If PcdMaximumAsciiStringLength is not zero and FirstString contains more than 1285 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1286 then ASSERT(). 1287 If PcdMaximumAsciiStringLength is not zero and SecondString contains more 1288 than PcdMaximumAsciiStringLength ASCII characters not including the 1289 Null-terminator, then ASSERT(). 1290 1291 @param FirstString The pointer to a Null-terminated ASCII string. 1292 @param SecondString The pointer to a Null-terminated ASCII string. 1293 1294 @retval ==0 FirstString is identical to SecondString using case insensitive 1295 comparisons. 1296 @retval !=0 FirstString is not identical to SecondString using case 1297 insensitive comparisons. 1298 1299 **/ 1300 INTN 1301 EFIAPI 1302 AsciiStriCmp ( 1303 IN CONST CHAR8 *FirstString, 1304 IN CONST CHAR8 *SecondString 1305 ); 1306 1307 1308 /** 1309 Compares two Null-terminated ASCII strings with maximum lengths, and returns 1310 the difference between the first mismatched ASCII characters. 1311 1312 This function compares the Null-terminated ASCII string FirstString to the 1313 Null-terminated ASCII string SecondString. At most, Length ASCII characters 1314 will be compared. If Length is 0, then 0 is returned. If FirstString is 1315 identical to SecondString, then 0 is returned. Otherwise, the value returned 1316 is the first mismatched ASCII character in SecondString subtracted from the 1317 first mismatched ASCII character in FirstString. 1318 1319 If Length > 0 and FirstString is NULL, then ASSERT(). 1320 If Length > 0 and SecondString is NULL, then ASSERT(). 1321 If PcdMaximumAsciiStringLength is not zero, and Length is greater than 1322 PcdMaximumAsciiStringLength, then ASSERT(). 1323 If PcdMaximumAsciiStringLength is not zero, and FirstString contains more than 1324 PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, 1325 then ASSERT(). 1326 If PcdMaximumAsciiStringLength is not zero, and SecondString contains more than 1327 PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, 1328 then ASSERT(). 1329 1330 @param FirstString The pointer to a Null-terminated ASCII string. 1331 @param SecondString The pointer to a Null-terminated ASCII string. 1332 @param Length The maximum number of ASCII characters for compare. 1333 1334 @retval ==0 FirstString is identical to SecondString. 1335 @retval !=0 FirstString is not identical to SecondString. 1336 1337 **/ 1338 INTN 1339 EFIAPI 1340 AsciiStrnCmp ( 1341 IN CONST CHAR8 *FirstString, 1342 IN CONST CHAR8 *SecondString, 1343 IN UINTN Length 1344 ); 1345 1346 1347 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 1348 1349 /** 1350 [ATTENTION] This function is deprecated for security reason. 1351 1352 Concatenates one Null-terminated ASCII string to another Null-terminated 1353 ASCII string, and returns the concatenated ASCII string. 1354 1355 This function concatenates two Null-terminated ASCII strings. The contents of 1356 Null-terminated ASCII string Source are concatenated to the end of Null- 1357 terminated ASCII string Destination. The Null-terminated concatenated ASCII 1358 String is returned. 1359 1360 If Destination is NULL, then ASSERT(). 1361 If Source is NULL, then ASSERT(). 1362 If PcdMaximumAsciiStringLength is not zero and Destination contains more than 1363 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1364 then ASSERT(). 1365 If PcdMaximumAsciiStringLength is not zero and Source contains more than 1366 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1367 then ASSERT(). 1368 If PcdMaximumAsciiStringLength is not zero and concatenating Destination and 1369 Source results in a ASCII string with more than PcdMaximumAsciiStringLength 1370 ASCII characters, then ASSERT(). 1371 1372 @param Destination The pointer to a Null-terminated ASCII string. 1373 @param Source The pointer to a Null-terminated ASCII string. 1374 1375 @return Destination 1376 1377 **/ 1378 CHAR8 * 1379 EFIAPI 1380 AsciiStrCat ( 1381 IN OUT CHAR8 *Destination, 1382 IN CONST CHAR8 *Source 1383 ); 1384 1385 1386 /** 1387 [ATTENTION] This function is deprecated for security reason. 1388 1389 Concatenates up to a specified length one Null-terminated ASCII string to 1390 the end of another Null-terminated ASCII string, and returns the 1391 concatenated ASCII string. 1392 1393 This function concatenates two Null-terminated ASCII strings. The contents 1394 of Null-terminated ASCII string Source are concatenated to the end of Null- 1395 terminated ASCII string Destination, and Destination is returned. At most, 1396 Length ASCII characters are concatenated from Source to the end of 1397 Destination, and Destination is always Null-terminated. If Length is 0, then 1398 Destination is returned unmodified. If Source and Destination overlap, then 1399 the results are undefined. 1400 1401 If Length > 0 and Destination is NULL, then ASSERT(). 1402 If Length > 0 and Source is NULL, then ASSERT(). 1403 If Source and Destination overlap, then ASSERT(). 1404 If PcdMaximumAsciiStringLength is not zero, and Length is greater than 1405 PcdMaximumAsciiStringLength, then ASSERT(). 1406 If PcdMaximumAsciiStringLength is not zero, and Destination contains more than 1407 PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, 1408 then ASSERT(). 1409 If PcdMaximumAsciiStringLength is not zero, and Source contains more than 1410 PcdMaximumAsciiStringLength ASCII characters, not including the Null-terminator, 1411 then ASSERT(). 1412 If PcdMaximumAsciiStringLength is not zero, and concatenating Destination and 1413 Source results in a ASCII string with more than PcdMaximumAsciiStringLength 1414 ASCII characters, not including the Null-terminator, then ASSERT(). 1415 1416 @param Destination The pointer to a Null-terminated ASCII string. 1417 @param Source The pointer to a Null-terminated ASCII string. 1418 @param Length The maximum number of ASCII characters to concatenate from 1419 Source. 1420 1421 @return Destination 1422 1423 **/ 1424 CHAR8 * 1425 EFIAPI 1426 AsciiStrnCat ( 1427 IN OUT CHAR8 *Destination, 1428 IN CONST CHAR8 *Source, 1429 IN UINTN Length 1430 ); 1431 #endif 1432 1433 /** 1434 Returns the first occurrence of a Null-terminated ASCII sub-string 1435 in a Null-terminated ASCII string. 1436 1437 This function scans the contents of the ASCII string specified by String 1438 and returns the first occurrence of SearchString. If SearchString is not 1439 found in String, then NULL is returned. If the length of SearchString is zero, 1440 then String is returned. 1441 1442 If String is NULL, then ASSERT(). 1443 If SearchString is NULL, then ASSERT(). 1444 1445 If PcdMaximumAsciiStringLength is not zero, and SearchString or 1446 String contains more than PcdMaximumAsciiStringLength Unicode characters 1447 not including the Null-terminator, then ASSERT(). 1448 1449 @param String The pointer to a Null-terminated ASCII string. 1450 @param SearchString The pointer to a Null-terminated ASCII string to search for. 1451 1452 @retval NULL If the SearchString does not appear in String. 1453 @retval others If there is a match return the first occurrence of SearchingString. 1454 If the length of SearchString is zero,return String. 1455 1456 **/ 1457 CHAR8 * 1458 EFIAPI 1459 AsciiStrStr ( 1460 IN CONST CHAR8 *String, 1461 IN CONST CHAR8 *SearchString 1462 ); 1463 1464 1465 /** 1466 Convert a Null-terminated ASCII decimal string to a value of type 1467 UINTN. 1468 1469 This function returns a value of type UINTN by interpreting the contents 1470 of the ASCII string String as a decimal number. The format of the input 1471 ASCII string String is: 1472 1473 [spaces] [decimal digits]. 1474 1475 The valid decimal digit character is in the range [0-9]. The function will 1476 ignore the pad space, which includes spaces or tab characters, before the digits. 1477 The running zero in the beginning of [decimal digits] will be ignored. Then, the 1478 function stops at the first character that is a not a valid decimal character or 1479 Null-terminator, whichever on comes first. 1480 1481 If String has only pad spaces, then 0 is returned. 1482 If String has no pad spaces or valid decimal digits, then 0 is returned. 1483 If the number represented by String overflows according to the range defined by 1484 UINTN, then ASSERT(). 1485 If String is NULL, then ASSERT(). 1486 If PcdMaximumAsciiStringLength is not zero, and String contains more than 1487 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1488 then ASSERT(). 1489 1490 @param String The pointer to a Null-terminated ASCII string. 1491 1492 @retval The value translated from String. 1493 1494 **/ 1495 UINTN 1496 EFIAPI 1497 AsciiStrDecimalToUintn ( 1498 IN CONST CHAR8 *String 1499 ); 1500 1501 1502 /** 1503 Convert a Null-terminated ASCII decimal string to a value of type 1504 UINT64. 1505 1506 This function returns a value of type UINT64 by interpreting the contents 1507 of the ASCII string String as a decimal number. The format of the input 1508 ASCII string String is: 1509 1510 [spaces] [decimal digits]. 1511 1512 The valid decimal digit character is in the range [0-9]. The function will 1513 ignore the pad space, which includes spaces or tab characters, before the digits. 1514 The running zero in the beginning of [decimal digits] will be ignored. Then, the 1515 function stops at the first character that is a not a valid decimal character or 1516 Null-terminator, whichever on comes first. 1517 1518 If String has only pad spaces, then 0 is returned. 1519 If String has no pad spaces or valid decimal digits, then 0 is returned. 1520 If the number represented by String overflows according to the range defined by 1521 UINT64, then ASSERT(). 1522 If String is NULL, then ASSERT(). 1523 If PcdMaximumAsciiStringLength is not zero, and String contains more than 1524 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1525 then ASSERT(). 1526 1527 @param String The pointer to a Null-terminated ASCII string. 1528 1529 @retval Value translated from String. 1530 1531 **/ 1532 UINT64 1533 EFIAPI 1534 AsciiStrDecimalToUint64 ( 1535 IN CONST CHAR8 *String 1536 ); 1537 1538 1539 /** 1540 Convert a Null-terminated ASCII hexadecimal string to a value of type UINTN. 1541 1542 This function returns a value of type UINTN by interpreting the contents of 1543 the ASCII string String as a hexadecimal number. The format of the input ASCII 1544 string String is: 1545 1546 [spaces][zeros][x][hexadecimal digits]. 1547 1548 The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. 1549 The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" 1550 appears in the input string, it must be prefixed with at least one 0. The function 1551 will ignore the pad space, which includes spaces or tab characters, before [zeros], 1552 [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] 1553 will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal 1554 digit. Then, the function stops at the first character that is a not a valid 1555 hexadecimal character or Null-terminator, whichever on comes first. 1556 1557 If String has only pad spaces, then 0 is returned. 1558 If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then 1559 0 is returned. 1560 1561 If the number represented by String overflows according to the range defined by UINTN, 1562 then ASSERT(). 1563 If String is NULL, then ASSERT(). 1564 If PcdMaximumAsciiStringLength is not zero, 1565 and String contains more than PcdMaximumAsciiStringLength ASCII characters not including 1566 the Null-terminator, then ASSERT(). 1567 1568 @param String The pointer to a Null-terminated ASCII string. 1569 1570 @retval Value translated from String. 1571 1572 **/ 1573 UINTN 1574 EFIAPI 1575 AsciiStrHexToUintn ( 1576 IN CONST CHAR8 *String 1577 ); 1578 1579 1580 /** 1581 Convert a Null-terminated ASCII hexadecimal string to a value of type UINT64. 1582 1583 This function returns a value of type UINT64 by interpreting the contents of 1584 the ASCII string String as a hexadecimal number. The format of the input ASCII 1585 string String is: 1586 1587 [spaces][zeros][x][hexadecimal digits]. 1588 1589 The valid hexadecimal digit character is in the range [0-9], [a-f] and [A-F]. 1590 The prefix "0x" is optional. Both "x" and "X" is allowed in "0x" prefix. If "x" 1591 appears in the input string, it must be prefixed with at least one 0. The function 1592 will ignore the pad space, which includes spaces or tab characters, before [zeros], 1593 [x] or [hexadecimal digits]. The running zero before [x] or [hexadecimal digits] 1594 will be ignored. Then, the decoding starts after [x] or the first valid hexadecimal 1595 digit. Then, the function stops at the first character that is a not a valid 1596 hexadecimal character or Null-terminator, whichever on comes first. 1597 1598 If String has only pad spaces, then 0 is returned. 1599 If String has no leading pad spaces, leading zeros or valid hexadecimal digits, then 1600 0 is returned. 1601 1602 If the number represented by String overflows according to the range defined by UINT64, 1603 then ASSERT(). 1604 If String is NULL, then ASSERT(). 1605 If PcdMaximumAsciiStringLength is not zero, 1606 and String contains more than PcdMaximumAsciiStringLength ASCII characters not including 1607 the Null-terminator, then ASSERT(). 1608 1609 @param String The pointer to a Null-terminated ASCII string. 1610 1611 @retval Value translated from String. 1612 1613 **/ 1614 UINT64 1615 EFIAPI 1616 AsciiStrHexToUint64 ( 1617 IN CONST CHAR8 *String 1618 ); 1619 1620 #ifndef DISABLE_NEW_DEPRECATED_INTERFACES 1621 1622 /** 1623 [ATTENTION] This function is deprecated for security reason. 1624 1625 Convert one Null-terminated ASCII string to a Null-terminated 1626 Unicode string and returns the Unicode string. 1627 1628 This function converts the contents of the ASCII string Source to the Unicode 1629 string Destination, and returns Destination. The function terminates the 1630 Unicode string Destination by appending a Null-terminator character at the end. 1631 The caller is responsible to make sure Destination points to a buffer with size 1632 equal or greater than ((AsciiStrLen (Source) + 1) * sizeof (CHAR16)) in bytes. 1633 1634 If Destination is NULL, then ASSERT(). 1635 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 1636 If Source is NULL, then ASSERT(). 1637 If Source and Destination overlap, then ASSERT(). 1638 If PcdMaximumAsciiStringLength is not zero, and Source contains more than 1639 PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, 1640 then ASSERT(). 1641 If PcdMaximumUnicodeStringLength is not zero, and Source contains more than 1642 PcdMaximumUnicodeStringLength ASCII characters not including the 1643 Null-terminator, then ASSERT(). 1644 1645 @param Source The pointer to a Null-terminated ASCII string. 1646 @param Destination The pointer to a Null-terminated Unicode string. 1647 1648 @return Destination. 1649 1650 **/ 1651 CHAR16 * 1652 EFIAPI 1653 AsciiStrToUnicodeStr ( 1654 IN CONST CHAR8 *Source, 1655 OUT CHAR16 *Destination 1656 ); 1657 1658 #endif 1659 1660 /** 1661 Convert one Null-terminated ASCII string to a Null-terminated 1662 Unicode string. 1663 1664 This function is similar to StrCpyS. 1665 1666 This function converts the contents of the ASCII string Source to the Unicode 1667 string Destination. The function terminates the Unicode string Destination by 1668 appending a Null-terminator character at the end. 1669 1670 The caller is responsible to make sure Destination points to a buffer with size 1671 equal or greater than ((AsciiStrLen (Source) + 1) * sizeof (CHAR16)) in bytes. 1672 1673 If Destination is not aligned on a 16-bit boundary, then ASSERT(). 1674 If an error would be returned, then the function will also ASSERT(). 1675 1676 If an error is returned, then the Destination is unmodified. 1677 1678 @param Source The pointer to a Null-terminated ASCII string. 1679 @param Destination The pointer to a Null-terminated Unicode string. 1680 @param DestMax The maximum number of Destination Unicode 1681 char, including terminating null char. 1682 1683 @retval RETURN_SUCCESS String is converted. 1684 @retval RETURN_BUFFER_TOO_SMALL If DestMax is NOT greater than StrLen(Source). 1685 @retval RETURN_INVALID_PARAMETER If Destination is NULL. 1686 If Source is NULL. 1687 If PcdMaximumUnicodeStringLength is not zero, 1688 and DestMax is greater than 1689 PcdMaximumUnicodeStringLength. 1690 If PcdMaximumAsciiStringLength is not zero, 1691 and DestMax is greater than 1692 PcdMaximumAsciiStringLength. 1693 If DestMax is 0. 1694 @retval RETURN_ACCESS_DENIED If Source and Destination overlap. 1695 1696 **/ 1697 RETURN_STATUS 1698 EFIAPI 1699 AsciiStrToUnicodeStrS ( 1700 IN CONST CHAR8 *Source, 1701 OUT CHAR16 *Destination, 1702 IN UINTN DestMax 1703 ); 1704 1705 /** 1706 Converts an 8-bit value to an 8-bit BCD value. 1707 1708 Converts the 8-bit value specified by Value to BCD. The BCD value is 1709 returned. 1710 1711 If Value >= 100, then ASSERT(). 1712 1713 @param Value The 8-bit value to convert to BCD. Range 0..99. 1714 1715 @return The BCD value. 1716 1717 **/ 1718 UINT8 1719 EFIAPI 1720 DecimalToBcd8 ( 1721 IN UINT8 Value 1722 ); 1723 1724 1725 /** 1726 Converts an 8-bit BCD value to an 8-bit value. 1727 1728 Converts the 8-bit BCD value specified by Value to an 8-bit value. The 8-bit 1729 value is returned. 1730 1731 If Value >= 0xA0, then ASSERT(). 1732 If (Value & 0x0F) >= 0x0A, then ASSERT(). 1733 1734 @param Value The 8-bit BCD value to convert to an 8-bit value. 1735 1736 @return The 8-bit value is returned. 1737 1738 **/ 1739 UINT8 1740 EFIAPI 1741 BcdToDecimal8 ( 1742 IN UINT8 Value 1743 ); 1744 1745 // 1746 // File Path Manipulation Functions 1747 // 1748 1749 /** 1750 Removes the last directory or file entry in a path. 1751 1752 @param[in, out] Path The pointer to the path to modify. 1753 1754 @retval FALSE Nothing was found to remove. 1755 @retval TRUE A directory or file was removed. 1756 **/ 1757 BOOLEAN 1758 EFIAPI 1759 PathRemoveLastItem( 1760 IN OUT CHAR16 *Path 1761 ); 1762 1763 /** 1764 Function to clean up paths. 1765 - Single periods in the path are removed. 1766 - Double periods in the path are removed along with a single parent directory. 1767 - Forward slashes L'/' are converted to backward slashes L'\'. 1768 1769 This will be done inline and the existing buffer may be larger than required 1770 upon completion. 1771 1772 @param[in] Path The pointer to the string containing the path. 1773 1774 @return Returns Path, otherwise returns NULL to indicate that an error has occurred. 1775 **/ 1776 CHAR16* 1777 EFIAPI 1778 PathCleanUpDirectories( 1779 IN CHAR16 *Path 1780 ); 1781 1782 // 1783 // Linked List Functions and Macros 1784 // 1785 1786 /** 1787 Initializes the head node of a doubly linked list that is declared as a 1788 global variable in a module. 1789 1790 Initializes the forward and backward links of a new linked list. After 1791 initializing a linked list with this macro, the other linked list functions 1792 may be used to add and remove nodes from the linked list. This macro results 1793 in smaller executables by initializing the linked list in the data section, 1794 instead if calling the InitializeListHead() function to perform the 1795 equivalent operation. 1796 1797 @param ListHead The head note of a list to initialize. 1798 1799 **/ 1800 #define INITIALIZE_LIST_HEAD_VARIABLE(ListHead) {&(ListHead), &(ListHead)} 1801 1802 1803 /** 1804 Initializes the head node of a doubly linked list, and returns the pointer to 1805 the head node of the doubly linked list. 1806 1807 Initializes the forward and backward links of a new linked list. After 1808 initializing a linked list with this function, the other linked list 1809 functions may be used to add and remove nodes from the linked list. It is up 1810 to the caller of this function to allocate the memory for ListHead. 1811 1812 If ListHead is NULL, then ASSERT(). 1813 1814 @param ListHead A pointer to the head node of a new doubly linked list. 1815 1816 @return ListHead 1817 1818 **/ 1819 LIST_ENTRY * 1820 EFIAPI 1821 InitializeListHead ( 1822 IN OUT LIST_ENTRY *ListHead 1823 ); 1824 1825 1826 /** 1827 Adds a node to the beginning of a doubly linked list, and returns the pointer 1828 to the head node of the doubly linked list. 1829 1830 Adds the node Entry at the beginning of the doubly linked list denoted by 1831 ListHead, and returns ListHead. 1832 1833 If ListHead is NULL, then ASSERT(). 1834 If Entry is NULL, then ASSERT(). 1835 If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1836 InitializeListHead(), then ASSERT(). 1837 If PcdMaximumLinkedListLength is not zero, and prior to insertion the number 1838 of nodes in ListHead, including the ListHead node, is greater than or 1839 equal to PcdMaximumLinkedListLength, then ASSERT(). 1840 1841 @param ListHead A pointer to the head node of a doubly linked list. 1842 @param Entry A pointer to a node that is to be inserted at the beginning 1843 of a doubly linked list. 1844 1845 @return ListHead 1846 1847 **/ 1848 LIST_ENTRY * 1849 EFIAPI 1850 InsertHeadList ( 1851 IN OUT LIST_ENTRY *ListHead, 1852 IN OUT LIST_ENTRY *Entry 1853 ); 1854 1855 1856 /** 1857 Adds a node to the end of a doubly linked list, and returns the pointer to 1858 the head node of the doubly linked list. 1859 1860 Adds the node Entry to the end of the doubly linked list denoted by ListHead, 1861 and returns ListHead. 1862 1863 If ListHead is NULL, then ASSERT(). 1864 If Entry is NULL, then ASSERT(). 1865 If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1866 InitializeListHead(), then ASSERT(). 1867 If PcdMaximumLinkedListLength is not zero, and prior to insertion the number 1868 of nodes in ListHead, including the ListHead node, is greater than or 1869 equal to PcdMaximumLinkedListLength, then ASSERT(). 1870 1871 @param ListHead A pointer to the head node of a doubly linked list. 1872 @param Entry A pointer to a node that is to be added at the end of the 1873 doubly linked list. 1874 1875 @return ListHead 1876 1877 **/ 1878 LIST_ENTRY * 1879 EFIAPI 1880 InsertTailList ( 1881 IN OUT LIST_ENTRY *ListHead, 1882 IN OUT LIST_ENTRY *Entry 1883 ); 1884 1885 1886 /** 1887 Retrieves the first node of a doubly linked list. 1888 1889 Returns the first node of a doubly linked list. List must have been 1890 initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). 1891 If List is empty, then List is returned. 1892 1893 If List is NULL, then ASSERT(). 1894 If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1895 InitializeListHead(), then ASSERT(). 1896 If PcdMaximumLinkedListLength is not zero, and the number of nodes 1897 in List, including the List node, is greater than or equal to 1898 PcdMaximumLinkedListLength, then ASSERT(). 1899 1900 @param List A pointer to the head node of a doubly linked list. 1901 1902 @return The first node of a doubly linked list. 1903 @retval List The list is empty. 1904 1905 **/ 1906 LIST_ENTRY * 1907 EFIAPI 1908 GetFirstNode ( 1909 IN CONST LIST_ENTRY *List 1910 ); 1911 1912 1913 /** 1914 Retrieves the next node of a doubly linked list. 1915 1916 Returns the node of a doubly linked list that follows Node. 1917 List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() 1918 or InitializeListHead(). If List is empty, then List is returned. 1919 1920 If List is NULL, then ASSERT(). 1921 If Node is NULL, then ASSERT(). 1922 If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1923 InitializeListHead(), then ASSERT(). 1924 If PcdMaximumLinkedListLength is not zero, and List contains more than 1925 PcdMaximumLinkedListLength nodes, then ASSERT(). 1926 If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT(). 1927 1928 @param List A pointer to the head node of a doubly linked list. 1929 @param Node A pointer to a node in the doubly linked list. 1930 1931 @return The pointer to the next node if one exists. Otherwise List is returned. 1932 1933 **/ 1934 LIST_ENTRY * 1935 EFIAPI 1936 GetNextNode ( 1937 IN CONST LIST_ENTRY *List, 1938 IN CONST LIST_ENTRY *Node 1939 ); 1940 1941 1942 /** 1943 Retrieves the previous node of a doubly linked list. 1944 1945 Returns the node of a doubly linked list that precedes Node. 1946 List must have been initialized with INTIALIZE_LIST_HEAD_VARIABLE() 1947 or InitializeListHead(). If List is empty, then List is returned. 1948 1949 If List is NULL, then ASSERT(). 1950 If Node is NULL, then ASSERT(). 1951 If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1952 InitializeListHead(), then ASSERT(). 1953 If PcdMaximumLinkedListLength is not zero, and List contains more than 1954 PcdMaximumLinkedListLength nodes, then ASSERT(). 1955 If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT(). 1956 1957 @param List A pointer to the head node of a doubly linked list. 1958 @param Node A pointer to a node in the doubly linked list. 1959 1960 @return The pointer to the previous node if one exists. Otherwise List is returned. 1961 1962 **/ 1963 LIST_ENTRY * 1964 EFIAPI 1965 GetPreviousNode ( 1966 IN CONST LIST_ENTRY *List, 1967 IN CONST LIST_ENTRY *Node 1968 ); 1969 1970 1971 /** 1972 Checks to see if a doubly linked list is empty or not. 1973 1974 Checks to see if the doubly linked list is empty. If the linked list contains 1975 zero nodes, this function returns TRUE. Otherwise, it returns FALSE. 1976 1977 If ListHead is NULL, then ASSERT(). 1978 If ListHead was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 1979 InitializeListHead(), then ASSERT(). 1980 If PcdMaximumLinkedListLength is not zero, and the number of nodes 1981 in List, including the List node, is greater than or equal to 1982 PcdMaximumLinkedListLength, then ASSERT(). 1983 1984 @param ListHead A pointer to the head node of a doubly linked list. 1985 1986 @retval TRUE The linked list is empty. 1987 @retval FALSE The linked list is not empty. 1988 1989 **/ 1990 BOOLEAN 1991 EFIAPI 1992 IsListEmpty ( 1993 IN CONST LIST_ENTRY *ListHead 1994 ); 1995 1996 1997 /** 1998 Determines if a node in a doubly linked list is the head node of a the same 1999 doubly linked list. This function is typically used to terminate a loop that 2000 traverses all the nodes in a doubly linked list starting with the head node. 2001 2002 Returns TRUE if Node is equal to List. Returns FALSE if Node is one of the 2003 nodes in the doubly linked list specified by List. List must have been 2004 initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). 2005 2006 If List is NULL, then ASSERT(). 2007 If Node is NULL, then ASSERT(). 2008 If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(), 2009 then ASSERT(). 2010 If PcdMaximumLinkedListLength is not zero, and the number of nodes 2011 in List, including the List node, is greater than or equal to 2012 PcdMaximumLinkedListLength, then ASSERT(). 2013 If PcdVerifyNodeInList is TRUE and Node is not a node in List the and Node is not equal 2014 to List, then ASSERT(). 2015 2016 @param List A pointer to the head node of a doubly linked list. 2017 @param Node A pointer to a node in the doubly linked list. 2018 2019 @retval TRUE Node is the head of the doubly-linked list pointed by List. 2020 @retval FALSE Node is not the head of the doubly-linked list pointed by List. 2021 2022 **/ 2023 BOOLEAN 2024 EFIAPI 2025 IsNull ( 2026 IN CONST LIST_ENTRY *List, 2027 IN CONST LIST_ENTRY *Node 2028 ); 2029 2030 2031 /** 2032 Determines if a node the last node in a doubly linked list. 2033 2034 Returns TRUE if Node is the last node in the doubly linked list specified by 2035 List. Otherwise, FALSE is returned. List must have been initialized with 2036 INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). 2037 2038 If List is NULL, then ASSERT(). 2039 If Node is NULL, then ASSERT(). 2040 If List was not initialized with INTIALIZE_LIST_HEAD_VARIABLE() or 2041 InitializeListHead(), then ASSERT(). 2042 If PcdMaximumLinkedListLength is not zero, and the number of nodes 2043 in List, including the List node, is greater than or equal to 2044 PcdMaximumLinkedListLength, then ASSERT(). 2045 If PcdVerifyNodeInList is TRUE and Node is not a node in List, then ASSERT(). 2046 2047 @param List A pointer to the head node of a doubly linked list. 2048 @param Node A pointer to a node in the doubly linked list. 2049 2050 @retval TRUE Node is the last node in the linked list. 2051 @retval FALSE Node is not the last node in the linked list. 2052 2053 **/ 2054 BOOLEAN 2055 EFIAPI 2056 IsNodeAtEnd ( 2057 IN CONST LIST_ENTRY *List, 2058 IN CONST LIST_ENTRY *Node 2059 ); 2060 2061 2062 /** 2063 Swaps the location of two nodes in a doubly linked list, and returns the 2064 first node after the swap. 2065 2066 If FirstEntry is identical to SecondEntry, then SecondEntry is returned. 2067 Otherwise, the location of the FirstEntry node is swapped with the location 2068 of the SecondEntry node in a doubly linked list. SecondEntry must be in the 2069 same double linked list as FirstEntry and that double linked list must have 2070 been initialized with INTIALIZE_LIST_HEAD_VARIABLE() or InitializeListHead(). 2071 SecondEntry is returned after the nodes are swapped. 2072 2073 If FirstEntry is NULL, then ASSERT(). 2074 If SecondEntry is NULL, then ASSERT(). 2075 If PcdVerifyNodeInList is TRUE and SecondEntry and FirstEntry are not in the 2076 same linked list, then ASSERT(). 2077 If PcdMaximumLinkedListLength is not zero, and the number of nodes in the 2078 linked list containing the FirstEntry and SecondEntry nodes, including 2079 the FirstEntry and SecondEntry nodes, is greater than or equal to 2080 PcdMaximumLinkedListLength, then ASSERT(). 2081 2082 @param FirstEntry A pointer to a node in a linked list. 2083 @param SecondEntry A pointer to another node in the same linked list. 2084 2085 @return SecondEntry. 2086 2087 **/ 2088 LIST_ENTRY * 2089 EFIAPI 2090 SwapListEntries ( 2091 IN OUT LIST_ENTRY *FirstEntry, 2092 IN OUT LIST_ENTRY *SecondEntry 2093 ); 2094 2095 2096 /** 2097 Removes a node from a doubly linked list, and returns the node that follows 2098 the removed node. 2099 2100 Removes the node Entry from a doubly linked list. It is up to the caller of 2101 this function to release the memory used by this node if that is required. On 2102 exit, the node following Entry in the doubly linked list is returned. If 2103 Entry is the only node in the linked list, then the head node of the linked 2104 list is returned. 2105 2106 If Entry is NULL, then ASSERT(). 2107 If Entry is the head node of an empty list, then ASSERT(). 2108 If PcdMaximumLinkedListLength is not zero, and the number of nodes in the 2109 linked list containing Entry, including the Entry node, is greater than 2110 or equal to PcdMaximumLinkedListLength, then ASSERT(). 2111 2112 @param Entry A pointer to a node in a linked list. 2113 2114 @return Entry. 2115 2116 **/ 2117 LIST_ENTRY * 2118 EFIAPI 2119 RemoveEntryList ( 2120 IN CONST LIST_ENTRY *Entry 2121 ); 2122 2123 // 2124 // Math Services 2125 // 2126 2127 /** 2128 Shifts a 64-bit integer left between 0 and 63 bits. The low bits are filled 2129 with zeros. The shifted value is returned. 2130 2131 This function shifts the 64-bit value Operand to the left by Count bits. The 2132 low Count bits are set to zero. The shifted value is returned. 2133 2134 If Count is greater than 63, then ASSERT(). 2135 2136 @param Operand The 64-bit operand to shift left. 2137 @param Count The number of bits to shift left. 2138 2139 @return Operand << Count. 2140 2141 **/ 2142 UINT64 2143 EFIAPI 2144 LShiftU64 ( 2145 IN UINT64 Operand, 2146 IN UINTN Count 2147 ); 2148 2149 2150 /** 2151 Shifts a 64-bit integer right between 0 and 63 bits. This high bits are 2152 filled with zeros. The shifted value is returned. 2153 2154 This function shifts the 64-bit value Operand to the right by Count bits. The 2155 high Count bits are set to zero. The shifted value is returned. 2156 2157 If Count is greater than 63, then ASSERT(). 2158 2159 @param Operand The 64-bit operand to shift right. 2160 @param Count The number of bits to shift right. 2161 2162 @return Operand >> Count 2163 2164 **/ 2165 UINT64 2166 EFIAPI 2167 RShiftU64 ( 2168 IN UINT64 Operand, 2169 IN UINTN Count 2170 ); 2171 2172 2173 /** 2174 Shifts a 64-bit integer right between 0 and 63 bits. The high bits are filled 2175 with original integer's bit 63. The shifted value is returned. 2176 2177 This function shifts the 64-bit value Operand to the right by Count bits. The 2178 high Count bits are set to bit 63 of Operand. The shifted value is returned. 2179 2180 If Count is greater than 63, then ASSERT(). 2181 2182 @param Operand The 64-bit operand to shift right. 2183 @param Count The number of bits to shift right. 2184 2185 @return Operand >> Count 2186 2187 **/ 2188 UINT64 2189 EFIAPI 2190 ARShiftU64 ( 2191 IN UINT64 Operand, 2192 IN UINTN Count 2193 ); 2194 2195 2196 /** 2197 Rotates a 32-bit integer left between 0 and 31 bits, filling the low bits 2198 with the high bits that were rotated. 2199 2200 This function rotates the 32-bit value Operand to the left by Count bits. The 2201 low Count bits are fill with the high Count bits of Operand. The rotated 2202 value is returned. 2203 2204 If Count is greater than 31, then ASSERT(). 2205 2206 @param Operand The 32-bit operand to rotate left. 2207 @param Count The number of bits to rotate left. 2208 2209 @return Operand << Count 2210 2211 **/ 2212 UINT32 2213 EFIAPI 2214 LRotU32 ( 2215 IN UINT32 Operand, 2216 IN UINTN Count 2217 ); 2218 2219 2220 /** 2221 Rotates a 32-bit integer right between 0 and 31 bits, filling the high bits 2222 with the low bits that were rotated. 2223 2224 This function rotates the 32-bit value Operand to the right by Count bits. 2225 The high Count bits are fill with the low Count bits of Operand. The rotated 2226 value is returned. 2227 2228 If Count is greater than 31, then ASSERT(). 2229 2230 @param Operand The 32-bit operand to rotate right. 2231 @param Count The number of bits to rotate right. 2232 2233 @return Operand >> Count 2234 2235 **/ 2236 UINT32 2237 EFIAPI 2238 RRotU32 ( 2239 IN UINT32 Operand, 2240 IN UINTN Count 2241 ); 2242 2243 2244 /** 2245 Rotates a 64-bit integer left between 0 and 63 bits, filling the low bits 2246 with the high bits that were rotated. 2247 2248 This function rotates the 64-bit value Operand to the left by Count bits. The 2249 low Count bits are fill with the high Count bits of Operand. The rotated 2250 value is returned. 2251 2252 If Count is greater than 63, then ASSERT(). 2253 2254 @param Operand The 64-bit operand to rotate left. 2255 @param Count The number of bits to rotate left. 2256 2257 @return Operand << Count 2258 2259 **/ 2260 UINT64 2261 EFIAPI 2262 LRotU64 ( 2263 IN UINT64 Operand, 2264 IN UINTN Count 2265 ); 2266 2267 2268 /** 2269 Rotates a 64-bit integer right between 0 and 63 bits, filling the high bits 2270 with the high low bits that were rotated. 2271 2272 This function rotates the 64-bit value Operand to the right by Count bits. 2273 The high Count bits are fill with the low Count bits of Operand. The rotated 2274 value is returned. 2275 2276 If Count is greater than 63, then ASSERT(). 2277 2278 @param Operand The 64-bit operand to rotate right. 2279 @param Count The number of bits to rotate right. 2280 2281 @return Operand >> Count 2282 2283 **/ 2284 UINT64 2285 EFIAPI 2286 RRotU64 ( 2287 IN UINT64 Operand, 2288 IN UINTN Count 2289 ); 2290 2291 2292 /** 2293 Returns the bit position of the lowest bit set in a 32-bit value. 2294 2295 This function computes the bit position of the lowest bit set in the 32-bit 2296 value specified by Operand. If Operand is zero, then -1 is returned. 2297 Otherwise, a value between 0 and 31 is returned. 2298 2299 @param Operand The 32-bit operand to evaluate. 2300 2301 @retval 0..31 The lowest bit set in Operand was found. 2302 @retval -1 Operand is zero. 2303 2304 **/ 2305 INTN 2306 EFIAPI 2307 LowBitSet32 ( 2308 IN UINT32 Operand 2309 ); 2310 2311 2312 /** 2313 Returns the bit position of the lowest bit set in a 64-bit value. 2314 2315 This function computes the bit position of the lowest bit set in the 64-bit 2316 value specified by Operand. If Operand is zero, then -1 is returned. 2317 Otherwise, a value between 0 and 63 is returned. 2318 2319 @param Operand The 64-bit operand to evaluate. 2320 2321 @retval 0..63 The lowest bit set in Operand was found. 2322 @retval -1 Operand is zero. 2323 2324 2325 **/ 2326 INTN 2327 EFIAPI 2328 LowBitSet64 ( 2329 IN UINT64 Operand 2330 ); 2331 2332 2333 /** 2334 Returns the bit position of the highest bit set in a 32-bit value. Equivalent 2335 to log2(x). 2336 2337 This function computes the bit position of the highest bit set in the 32-bit 2338 value specified by Operand. If Operand is zero, then -1 is returned. 2339 Otherwise, a value between 0 and 31 is returned. 2340 2341 @param Operand The 32-bit operand to evaluate. 2342 2343 @retval 0..31 Position of the highest bit set in Operand if found. 2344 @retval -1 Operand is zero. 2345 2346 **/ 2347 INTN 2348 EFIAPI 2349 HighBitSet32 ( 2350 IN UINT32 Operand 2351 ); 2352 2353 2354 /** 2355 Returns the bit position of the highest bit set in a 64-bit value. Equivalent 2356 to log2(x). 2357 2358 This function computes the bit position of the highest bit set in the 64-bit 2359 value specified by Operand. If Operand is zero, then -1 is returned. 2360 Otherwise, a value between 0 and 63 is returned. 2361 2362 @param Operand The 64-bit operand to evaluate. 2363 2364 @retval 0..63 Position of the highest bit set in Operand if found. 2365 @retval -1 Operand is zero. 2366 2367 **/ 2368 INTN 2369 EFIAPI 2370 HighBitSet64 ( 2371 IN UINT64 Operand 2372 ); 2373 2374 2375 /** 2376 Returns the value of the highest bit set in a 32-bit value. Equivalent to 2377 1 << log2(x). 2378 2379 This function computes the value of the highest bit set in the 32-bit value 2380 specified by Operand. If Operand is zero, then zero is returned. 2381 2382 @param Operand The 32-bit operand to evaluate. 2383 2384 @return 1 << HighBitSet32(Operand) 2385 @retval 0 Operand is zero. 2386 2387 **/ 2388 UINT32 2389 EFIAPI 2390 GetPowerOfTwo32 ( 2391 IN UINT32 Operand 2392 ); 2393 2394 2395 /** 2396 Returns the value of the highest bit set in a 64-bit value. Equivalent to 2397 1 << log2(x). 2398 2399 This function computes the value of the highest bit set in the 64-bit value 2400 specified by Operand. If Operand is zero, then zero is returned. 2401 2402 @param Operand The 64-bit operand to evaluate. 2403 2404 @return 1 << HighBitSet64(Operand) 2405 @retval 0 Operand is zero. 2406 2407 **/ 2408 UINT64 2409 EFIAPI 2410 GetPowerOfTwo64 ( 2411 IN UINT64 Operand 2412 ); 2413 2414 2415 /** 2416 Switches the endianness of a 16-bit integer. 2417 2418 This function swaps the bytes in a 16-bit unsigned value to switch the value 2419 from little endian to big endian or vice versa. The byte swapped value is 2420 returned. 2421 2422 @param Value A 16-bit unsigned value. 2423 2424 @return The byte swapped Value. 2425 2426 **/ 2427 UINT16 2428 EFIAPI 2429 SwapBytes16 ( 2430 IN UINT16 Value 2431 ); 2432 2433 2434 /** 2435 Switches the endianness of a 32-bit integer. 2436 2437 This function swaps the bytes in a 32-bit unsigned value to switch the value 2438 from little endian to big endian or vice versa. The byte swapped value is 2439 returned. 2440 2441 @param Value A 32-bit unsigned value. 2442 2443 @return The byte swapped Value. 2444 2445 **/ 2446 UINT32 2447 EFIAPI 2448 SwapBytes32 ( 2449 IN UINT32 Value 2450 ); 2451 2452 2453 /** 2454 Switches the endianness of a 64-bit integer. 2455 2456 This function swaps the bytes in a 64-bit unsigned value to switch the value 2457 from little endian to big endian or vice versa. The byte swapped value is 2458 returned. 2459 2460 @param Value A 64-bit unsigned value. 2461 2462 @return The byte swapped Value. 2463 2464 **/ 2465 UINT64 2466 EFIAPI 2467 SwapBytes64 ( 2468 IN UINT64 Value 2469 ); 2470 2471 2472 /** 2473 Multiples a 64-bit unsigned integer by a 32-bit unsigned integer and 2474 generates a 64-bit unsigned result. 2475 2476 This function multiples the 64-bit unsigned value Multiplicand by the 32-bit 2477 unsigned value Multiplier and generates a 64-bit unsigned result. This 64- 2478 bit unsigned result is returned. 2479 2480 @param Multiplicand A 64-bit unsigned value. 2481 @param Multiplier A 32-bit unsigned value. 2482 2483 @return Multiplicand * Multiplier 2484 2485 **/ 2486 UINT64 2487 EFIAPI 2488 MultU64x32 ( 2489 IN UINT64 Multiplicand, 2490 IN UINT32 Multiplier 2491 ); 2492 2493 2494 /** 2495 Multiples a 64-bit unsigned integer by a 64-bit unsigned integer and 2496 generates a 64-bit unsigned result. 2497 2498 This function multiples the 64-bit unsigned value Multiplicand by the 64-bit 2499 unsigned value Multiplier and generates a 64-bit unsigned result. This 64- 2500 bit unsigned result is returned. 2501 2502 @param Multiplicand A 64-bit unsigned value. 2503 @param Multiplier A 64-bit unsigned value. 2504 2505 @return Multiplicand * Multiplier. 2506 2507 **/ 2508 UINT64 2509 EFIAPI 2510 MultU64x64 ( 2511 IN UINT64 Multiplicand, 2512 IN UINT64 Multiplier 2513 ); 2514 2515 2516 /** 2517 Multiples a 64-bit signed integer by a 64-bit signed integer and generates a 2518 64-bit signed result. 2519 2520 This function multiples the 64-bit signed value Multiplicand by the 64-bit 2521 signed value Multiplier and generates a 64-bit signed result. This 64-bit 2522 signed result is returned. 2523 2524 @param Multiplicand A 64-bit signed value. 2525 @param Multiplier A 64-bit signed value. 2526 2527 @return Multiplicand * Multiplier 2528 2529 **/ 2530 INT64 2531 EFIAPI 2532 MultS64x64 ( 2533 IN INT64 Multiplicand, 2534 IN INT64 Multiplier 2535 ); 2536 2537 2538 /** 2539 Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates 2540 a 64-bit unsigned result. 2541 2542 This function divides the 64-bit unsigned value Dividend by the 32-bit 2543 unsigned value Divisor and generates a 64-bit unsigned quotient. This 2544 function returns the 64-bit unsigned quotient. 2545 2546 If Divisor is 0, then ASSERT(). 2547 2548 @param Dividend A 64-bit unsigned value. 2549 @param Divisor A 32-bit unsigned value. 2550 2551 @return Dividend / Divisor. 2552 2553 **/ 2554 UINT64 2555 EFIAPI 2556 DivU64x32 ( 2557 IN UINT64 Dividend, 2558 IN UINT32 Divisor 2559 ); 2560 2561 2562 /** 2563 Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates 2564 a 32-bit unsigned remainder. 2565 2566 This function divides the 64-bit unsigned value Dividend by the 32-bit 2567 unsigned value Divisor and generates a 32-bit remainder. This function 2568 returns the 32-bit unsigned remainder. 2569 2570 If Divisor is 0, then ASSERT(). 2571 2572 @param Dividend A 64-bit unsigned value. 2573 @param Divisor A 32-bit unsigned value. 2574 2575 @return Dividend % Divisor. 2576 2577 **/ 2578 UINT32 2579 EFIAPI 2580 ModU64x32 ( 2581 IN UINT64 Dividend, 2582 IN UINT32 Divisor 2583 ); 2584 2585 2586 /** 2587 Divides a 64-bit unsigned integer by a 32-bit unsigned integer and generates 2588 a 64-bit unsigned result and an optional 32-bit unsigned remainder. 2589 2590 This function divides the 64-bit unsigned value Dividend by the 32-bit 2591 unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder 2592 is not NULL, then the 32-bit unsigned remainder is returned in Remainder. 2593 This function returns the 64-bit unsigned quotient. 2594 2595 If Divisor is 0, then ASSERT(). 2596 2597 @param Dividend A 64-bit unsigned value. 2598 @param Divisor A 32-bit unsigned value. 2599 @param Remainder A pointer to a 32-bit unsigned value. This parameter is 2600 optional and may be NULL. 2601 2602 @return Dividend / Divisor. 2603 2604 **/ 2605 UINT64 2606 EFIAPI 2607 DivU64x32Remainder ( 2608 IN UINT64 Dividend, 2609 IN UINT32 Divisor, 2610 OUT UINT32 *Remainder OPTIONAL 2611 ); 2612 2613 2614 /** 2615 Divides a 64-bit unsigned integer by a 64-bit unsigned integer and generates 2616 a 64-bit unsigned result and an optional 64-bit unsigned remainder. 2617 2618 This function divides the 64-bit unsigned value Dividend by the 64-bit 2619 unsigned value Divisor and generates a 64-bit unsigned quotient. If Remainder 2620 is not NULL, then the 64-bit unsigned remainder is returned in Remainder. 2621 This function returns the 64-bit unsigned quotient. 2622 2623 If Divisor is 0, then ASSERT(). 2624 2625 @param Dividend A 64-bit unsigned value. 2626 @param Divisor A 64-bit unsigned value. 2627 @param Remainder A pointer to a 64-bit unsigned value. This parameter is 2628 optional and may be NULL. 2629 2630 @return Dividend / Divisor. 2631 2632 **/ 2633 UINT64 2634 EFIAPI 2635 DivU64x64Remainder ( 2636 IN UINT64 Dividend, 2637 IN UINT64 Divisor, 2638 OUT UINT64 *Remainder OPTIONAL 2639 ); 2640 2641 2642 /** 2643 Divides a 64-bit signed integer by a 64-bit signed integer and generates a 2644 64-bit signed result and a optional 64-bit signed remainder. 2645 2646 This function divides the 64-bit signed value Dividend by the 64-bit signed 2647 value Divisor and generates a 64-bit signed quotient. If Remainder is not 2648 NULL, then the 64-bit signed remainder is returned in Remainder. This 2649 function returns the 64-bit signed quotient. 2650 2651 It is the caller's responsibility to not call this function with a Divisor of 0. 2652 If Divisor is 0, then the quotient and remainder should be assumed to be 2653 the largest negative integer. 2654 2655 If Divisor is 0, then ASSERT(). 2656 2657 @param Dividend A 64-bit signed value. 2658 @param Divisor A 64-bit signed value. 2659 @param Remainder A pointer to a 64-bit signed value. This parameter is 2660 optional and may be NULL. 2661 2662 @return Dividend / Divisor. 2663 2664 **/ 2665 INT64 2666 EFIAPI 2667 DivS64x64Remainder ( 2668 IN INT64 Dividend, 2669 IN INT64 Divisor, 2670 OUT INT64 *Remainder OPTIONAL 2671 ); 2672 2673 2674 /** 2675 Reads a 16-bit value from memory that may be unaligned. 2676 2677 This function returns the 16-bit value pointed to by Buffer. The function 2678 guarantees that the read operation does not produce an alignment fault. 2679 2680 If the Buffer is NULL, then ASSERT(). 2681 2682 @param Buffer The pointer to a 16-bit value that may be unaligned. 2683 2684 @return The 16-bit value read from Buffer. 2685 2686 **/ 2687 UINT16 2688 EFIAPI 2689 ReadUnaligned16 ( 2690 IN CONST UINT16 *Buffer 2691 ); 2692 2693 2694 /** 2695 Writes a 16-bit value to memory that may be unaligned. 2696 2697 This function writes the 16-bit value specified by Value to Buffer. Value is 2698 returned. The function guarantees that the write operation does not produce 2699 an alignment fault. 2700 2701 If the Buffer is NULL, then ASSERT(). 2702 2703 @param Buffer The pointer to a 16-bit value that may be unaligned. 2704 @param Value 16-bit value to write to Buffer. 2705 2706 @return The 16-bit value to write to Buffer. 2707 2708 **/ 2709 UINT16 2710 EFIAPI 2711 WriteUnaligned16 ( 2712 OUT UINT16 *Buffer, 2713 IN UINT16 Value 2714 ); 2715 2716 2717 /** 2718 Reads a 24-bit value from memory that may be unaligned. 2719 2720 This function returns the 24-bit value pointed to by Buffer. The function 2721 guarantees that the read operation does not produce an alignment fault. 2722 2723 If the Buffer is NULL, then ASSERT(). 2724 2725 @param Buffer The pointer to a 24-bit value that may be unaligned. 2726 2727 @return The 24-bit value read from Buffer. 2728 2729 **/ 2730 UINT32 2731 EFIAPI 2732 ReadUnaligned24 ( 2733 IN CONST UINT32 *Buffer 2734 ); 2735 2736 2737 /** 2738 Writes a 24-bit value to memory that may be unaligned. 2739 2740 This function writes the 24-bit value specified by Value to Buffer. Value is 2741 returned. The function guarantees that the write operation does not produce 2742 an alignment fault. 2743 2744 If the Buffer is NULL, then ASSERT(). 2745 2746 @param Buffer The pointer to a 24-bit value that may be unaligned. 2747 @param Value 24-bit value to write to Buffer. 2748 2749 @return The 24-bit value to write to Buffer. 2750 2751 **/ 2752 UINT32 2753 EFIAPI 2754 WriteUnaligned24 ( 2755 OUT UINT32 *Buffer, 2756 IN UINT32 Value 2757 ); 2758 2759 2760 /** 2761 Reads a 32-bit value from memory that may be unaligned. 2762 2763 This function returns the 32-bit value pointed to by Buffer. The function 2764 guarantees that the read operation does not produce an alignment fault. 2765 2766 If the Buffer is NULL, then ASSERT(). 2767 2768 @param Buffer The pointer to a 32-bit value that may be unaligned. 2769 2770 @return The 32-bit value read from Buffer. 2771 2772 **/ 2773 UINT32 2774 EFIAPI 2775 ReadUnaligned32 ( 2776 IN CONST UINT32 *Buffer 2777 ); 2778 2779 2780 /** 2781 Writes a 32-bit value to memory that may be unaligned. 2782 2783 This function writes the 32-bit value specified by Value to Buffer. Value is 2784 returned. The function guarantees that the write operation does not produce 2785 an alignment fault. 2786 2787 If the Buffer is NULL, then ASSERT(). 2788 2789 @param Buffer The pointer to a 32-bit value that may be unaligned. 2790 @param Value 32-bit value to write to Buffer. 2791 2792 @return The 32-bit value to write to Buffer. 2793 2794 **/ 2795 UINT32 2796 EFIAPI 2797 WriteUnaligned32 ( 2798 OUT UINT32 *Buffer, 2799 IN UINT32 Value 2800 ); 2801 2802 2803 /** 2804 Reads a 64-bit value from memory that may be unaligned. 2805 2806 This function returns the 64-bit value pointed to by Buffer. The function 2807 guarantees that the read operation does not produce an alignment fault. 2808 2809 If the Buffer is NULL, then ASSERT(). 2810 2811 @param Buffer The pointer to a 64-bit value that may be unaligned. 2812 2813 @return The 64-bit value read from Buffer. 2814 2815 **/ 2816 UINT64 2817 EFIAPI 2818 ReadUnaligned64 ( 2819 IN CONST UINT64 *Buffer 2820 ); 2821 2822 2823 /** 2824 Writes a 64-bit value to memory that may be unaligned. 2825 2826 This function writes the 64-bit value specified by Value to Buffer. Value is 2827 returned. The function guarantees that the write operation does not produce 2828 an alignment fault. 2829 2830 If the Buffer is NULL, then ASSERT(). 2831 2832 @param Buffer The pointer to a 64-bit value that may be unaligned. 2833 @param Value 64-bit value to write to Buffer. 2834 2835 @return The 64-bit value to write to Buffer. 2836 2837 **/ 2838 UINT64 2839 EFIAPI 2840 WriteUnaligned64 ( 2841 OUT UINT64 *Buffer, 2842 IN UINT64 Value 2843 ); 2844 2845 2846 // 2847 // Bit Field Functions 2848 // 2849 2850 /** 2851 Returns a bit field from an 8-bit value. 2852 2853 Returns the bitfield specified by the StartBit and the EndBit from Operand. 2854 2855 If 8-bit operations are not supported, then ASSERT(). 2856 If StartBit is greater than 7, then ASSERT(). 2857 If EndBit is greater than 7, then ASSERT(). 2858 If EndBit is less than StartBit, then ASSERT(). 2859 2860 @param Operand Operand on which to perform the bitfield operation. 2861 @param StartBit The ordinal of the least significant bit in the bit field. 2862 Range 0..7. 2863 @param EndBit The ordinal of the most significant bit in the bit field. 2864 Range 0..7. 2865 2866 @return The bit field read. 2867 2868 **/ 2869 UINT8 2870 EFIAPI 2871 BitFieldRead8 ( 2872 IN UINT8 Operand, 2873 IN UINTN StartBit, 2874 IN UINTN EndBit 2875 ); 2876 2877 2878 /** 2879 Writes a bit field to an 8-bit value, and returns the result. 2880 2881 Writes Value to the bit field specified by the StartBit and the EndBit in 2882 Operand. All other bits in Operand are preserved. The new 8-bit value is 2883 returned. 2884 2885 If 8-bit operations are not supported, then ASSERT(). 2886 If StartBit is greater than 7, then ASSERT(). 2887 If EndBit is greater than 7, then ASSERT(). 2888 If EndBit is less than StartBit, then ASSERT(). 2889 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 2890 2891 @param Operand Operand on which to perform the bitfield operation. 2892 @param StartBit The ordinal of the least significant bit in the bit field. 2893 Range 0..7. 2894 @param EndBit The ordinal of the most significant bit in the bit field. 2895 Range 0..7. 2896 @param Value New value of the bit field. 2897 2898 @return The new 8-bit value. 2899 2900 **/ 2901 UINT8 2902 EFIAPI 2903 BitFieldWrite8 ( 2904 IN UINT8 Operand, 2905 IN UINTN StartBit, 2906 IN UINTN EndBit, 2907 IN UINT8 Value 2908 ); 2909 2910 2911 /** 2912 Reads a bit field from an 8-bit value, performs a bitwise OR, and returns the 2913 result. 2914 2915 Performs a bitwise OR between the bit field specified by StartBit 2916 and EndBit in Operand and the value specified by OrData. All other bits in 2917 Operand are preserved. The new 8-bit value is returned. 2918 2919 If 8-bit operations are not supported, then ASSERT(). 2920 If StartBit is greater than 7, then ASSERT(). 2921 If EndBit is greater than 7, then ASSERT(). 2922 If EndBit is less than StartBit, then ASSERT(). 2923 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 2924 2925 @param Operand Operand on which to perform the bitfield operation. 2926 @param StartBit The ordinal of the least significant bit in the bit field. 2927 Range 0..7. 2928 @param EndBit The ordinal of the most significant bit in the bit field. 2929 Range 0..7. 2930 @param OrData The value to OR with the read value from the value 2931 2932 @return The new 8-bit value. 2933 2934 **/ 2935 UINT8 2936 EFIAPI 2937 BitFieldOr8 ( 2938 IN UINT8 Operand, 2939 IN UINTN StartBit, 2940 IN UINTN EndBit, 2941 IN UINT8 OrData 2942 ); 2943 2944 2945 /** 2946 Reads a bit field from an 8-bit value, performs a bitwise AND, and returns 2947 the result. 2948 2949 Performs a bitwise AND between the bit field specified by StartBit and EndBit 2950 in Operand and the value specified by AndData. All other bits in Operand are 2951 preserved. The new 8-bit value is returned. 2952 2953 If 8-bit operations are not supported, then ASSERT(). 2954 If StartBit is greater than 7, then ASSERT(). 2955 If EndBit is greater than 7, then ASSERT(). 2956 If EndBit is less than StartBit, then ASSERT(). 2957 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 2958 2959 @param Operand Operand on which to perform the bitfield operation. 2960 @param StartBit The ordinal of the least significant bit in the bit field. 2961 Range 0..7. 2962 @param EndBit The ordinal of the most significant bit in the bit field. 2963 Range 0..7. 2964 @param AndData The value to AND with the read value from the value. 2965 2966 @return The new 8-bit value. 2967 2968 **/ 2969 UINT8 2970 EFIAPI 2971 BitFieldAnd8 ( 2972 IN UINT8 Operand, 2973 IN UINTN StartBit, 2974 IN UINTN EndBit, 2975 IN UINT8 AndData 2976 ); 2977 2978 2979 /** 2980 Reads a bit field from an 8-bit value, performs a bitwise AND followed by a 2981 bitwise OR, and returns the result. 2982 2983 Performs a bitwise AND between the bit field specified by StartBit and EndBit 2984 in Operand and the value specified by AndData, followed by a bitwise 2985 OR with value specified by OrData. All other bits in Operand are 2986 preserved. The new 8-bit value is returned. 2987 2988 If 8-bit operations are not supported, then ASSERT(). 2989 If StartBit is greater than 7, then ASSERT(). 2990 If EndBit is greater than 7, then ASSERT(). 2991 If EndBit is less than StartBit, then ASSERT(). 2992 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 2993 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 2994 2995 @param Operand Operand on which to perform the bitfield operation. 2996 @param StartBit The ordinal of the least significant bit in the bit field. 2997 Range 0..7. 2998 @param EndBit The ordinal of the most significant bit in the bit field. 2999 Range 0..7. 3000 @param AndData The value to AND with the read value from the value. 3001 @param OrData The value to OR with the result of the AND operation. 3002 3003 @return The new 8-bit value. 3004 3005 **/ 3006 UINT8 3007 EFIAPI 3008 BitFieldAndThenOr8 ( 3009 IN UINT8 Operand, 3010 IN UINTN StartBit, 3011 IN UINTN EndBit, 3012 IN UINT8 AndData, 3013 IN UINT8 OrData 3014 ); 3015 3016 3017 /** 3018 Returns a bit field from a 16-bit value. 3019 3020 Returns the bitfield specified by the StartBit and the EndBit from Operand. 3021 3022 If 16-bit operations are not supported, then ASSERT(). 3023 If StartBit is greater than 15, then ASSERT(). 3024 If EndBit is greater than 15, then ASSERT(). 3025 If EndBit is less than StartBit, then ASSERT(). 3026 3027 @param Operand Operand on which to perform the bitfield operation. 3028 @param StartBit The ordinal of the least significant bit in the bit field. 3029 Range 0..15. 3030 @param EndBit The ordinal of the most significant bit in the bit field. 3031 Range 0..15. 3032 3033 @return The bit field read. 3034 3035 **/ 3036 UINT16 3037 EFIAPI 3038 BitFieldRead16 ( 3039 IN UINT16 Operand, 3040 IN UINTN StartBit, 3041 IN UINTN EndBit 3042 ); 3043 3044 3045 /** 3046 Writes a bit field to a 16-bit value, and returns the result. 3047 3048 Writes Value to the bit field specified by the StartBit and the EndBit in 3049 Operand. All other bits in Operand are preserved. The new 16-bit value is 3050 returned. 3051 3052 If 16-bit operations are not supported, then ASSERT(). 3053 If StartBit is greater than 15, then ASSERT(). 3054 If EndBit is greater than 15, then ASSERT(). 3055 If EndBit is less than StartBit, then ASSERT(). 3056 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3057 3058 @param Operand Operand on which to perform the bitfield operation. 3059 @param StartBit The ordinal of the least significant bit in the bit field. 3060 Range 0..15. 3061 @param EndBit The ordinal of the most significant bit in the bit field. 3062 Range 0..15. 3063 @param Value New value of the bit field. 3064 3065 @return The new 16-bit value. 3066 3067 **/ 3068 UINT16 3069 EFIAPI 3070 BitFieldWrite16 ( 3071 IN UINT16 Operand, 3072 IN UINTN StartBit, 3073 IN UINTN EndBit, 3074 IN UINT16 Value 3075 ); 3076 3077 3078 /** 3079 Reads a bit field from a 16-bit value, performs a bitwise OR, and returns the 3080 result. 3081 3082 Performs a bitwise OR between the bit field specified by StartBit 3083 and EndBit in Operand and the value specified by OrData. All other bits in 3084 Operand are preserved. The new 16-bit value is returned. 3085 3086 If 16-bit operations are not supported, then ASSERT(). 3087 If StartBit is greater than 15, then ASSERT(). 3088 If EndBit is greater than 15, then ASSERT(). 3089 If EndBit is less than StartBit, then ASSERT(). 3090 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3091 3092 @param Operand Operand on which to perform the bitfield operation. 3093 @param StartBit The ordinal of the least significant bit in the bit field. 3094 Range 0..15. 3095 @param EndBit The ordinal of the most significant bit in the bit field. 3096 Range 0..15. 3097 @param OrData The value to OR with the read value from the value 3098 3099 @return The new 16-bit value. 3100 3101 **/ 3102 UINT16 3103 EFIAPI 3104 BitFieldOr16 ( 3105 IN UINT16 Operand, 3106 IN UINTN StartBit, 3107 IN UINTN EndBit, 3108 IN UINT16 OrData 3109 ); 3110 3111 3112 /** 3113 Reads a bit field from a 16-bit value, performs a bitwise AND, and returns 3114 the result. 3115 3116 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3117 in Operand and the value specified by AndData. All other bits in Operand are 3118 preserved. The new 16-bit value is returned. 3119 3120 If 16-bit operations are not supported, then ASSERT(). 3121 If StartBit is greater than 15, then ASSERT(). 3122 If EndBit is greater than 15, then ASSERT(). 3123 If EndBit is less than StartBit, then ASSERT(). 3124 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3125 3126 @param Operand Operand on which to perform the bitfield operation. 3127 @param StartBit The ordinal of the least significant bit in the bit field. 3128 Range 0..15. 3129 @param EndBit The ordinal of the most significant bit in the bit field. 3130 Range 0..15. 3131 @param AndData The value to AND with the read value from the value 3132 3133 @return The new 16-bit value. 3134 3135 **/ 3136 UINT16 3137 EFIAPI 3138 BitFieldAnd16 ( 3139 IN UINT16 Operand, 3140 IN UINTN StartBit, 3141 IN UINTN EndBit, 3142 IN UINT16 AndData 3143 ); 3144 3145 3146 /** 3147 Reads a bit field from a 16-bit value, performs a bitwise AND followed by a 3148 bitwise OR, and returns the result. 3149 3150 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3151 in Operand and the value specified by AndData, followed by a bitwise 3152 OR with value specified by OrData. All other bits in Operand are 3153 preserved. The new 16-bit value is returned. 3154 3155 If 16-bit operations are not supported, then ASSERT(). 3156 If StartBit is greater than 15, then ASSERT(). 3157 If EndBit is greater than 15, then ASSERT(). 3158 If EndBit is less than StartBit, then ASSERT(). 3159 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3160 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3161 3162 @param Operand Operand on which to perform the bitfield operation. 3163 @param StartBit The ordinal of the least significant bit in the bit field. 3164 Range 0..15. 3165 @param EndBit The ordinal of the most significant bit in the bit field. 3166 Range 0..15. 3167 @param AndData The value to AND with the read value from the value. 3168 @param OrData The value to OR with the result of the AND operation. 3169 3170 @return The new 16-bit value. 3171 3172 **/ 3173 UINT16 3174 EFIAPI 3175 BitFieldAndThenOr16 ( 3176 IN UINT16 Operand, 3177 IN UINTN StartBit, 3178 IN UINTN EndBit, 3179 IN UINT16 AndData, 3180 IN UINT16 OrData 3181 ); 3182 3183 3184 /** 3185 Returns a bit field from a 32-bit value. 3186 3187 Returns the bitfield specified by the StartBit and the EndBit from Operand. 3188 3189 If 32-bit operations are not supported, then ASSERT(). 3190 If StartBit is greater than 31, then ASSERT(). 3191 If EndBit is greater than 31, then ASSERT(). 3192 If EndBit is less than StartBit, then ASSERT(). 3193 3194 @param Operand Operand on which to perform the bitfield operation. 3195 @param StartBit The ordinal of the least significant bit in the bit field. 3196 Range 0..31. 3197 @param EndBit The ordinal of the most significant bit in the bit field. 3198 Range 0..31. 3199 3200 @return The bit field read. 3201 3202 **/ 3203 UINT32 3204 EFIAPI 3205 BitFieldRead32 ( 3206 IN UINT32 Operand, 3207 IN UINTN StartBit, 3208 IN UINTN EndBit 3209 ); 3210 3211 3212 /** 3213 Writes a bit field to a 32-bit value, and returns the result. 3214 3215 Writes Value to the bit field specified by the StartBit and the EndBit in 3216 Operand. All other bits in Operand are preserved. The new 32-bit value is 3217 returned. 3218 3219 If 32-bit operations are not supported, then ASSERT(). 3220 If StartBit is greater than 31, then ASSERT(). 3221 If EndBit is greater than 31, then ASSERT(). 3222 If EndBit is less than StartBit, then ASSERT(). 3223 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3224 3225 @param Operand Operand on which to perform the bitfield operation. 3226 @param StartBit The ordinal of the least significant bit in the bit field. 3227 Range 0..31. 3228 @param EndBit The ordinal of the most significant bit in the bit field. 3229 Range 0..31. 3230 @param Value New value of the bit field. 3231 3232 @return The new 32-bit value. 3233 3234 **/ 3235 UINT32 3236 EFIAPI 3237 BitFieldWrite32 ( 3238 IN UINT32 Operand, 3239 IN UINTN StartBit, 3240 IN UINTN EndBit, 3241 IN UINT32 Value 3242 ); 3243 3244 3245 /** 3246 Reads a bit field from a 32-bit value, performs a bitwise OR, and returns the 3247 result. 3248 3249 Performs a bitwise OR between the bit field specified by StartBit 3250 and EndBit in Operand and the value specified by OrData. All other bits in 3251 Operand are preserved. The new 32-bit value is returned. 3252 3253 If 32-bit operations are not supported, then ASSERT(). 3254 If StartBit is greater than 31, then ASSERT(). 3255 If EndBit is greater than 31, then ASSERT(). 3256 If EndBit is less than StartBit, then ASSERT(). 3257 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3258 3259 @param Operand Operand on which to perform the bitfield operation. 3260 @param StartBit The ordinal of the least significant bit in the bit field. 3261 Range 0..31. 3262 @param EndBit The ordinal of the most significant bit in the bit field. 3263 Range 0..31. 3264 @param OrData The value to OR with the read value from the value. 3265 3266 @return The new 32-bit value. 3267 3268 **/ 3269 UINT32 3270 EFIAPI 3271 BitFieldOr32 ( 3272 IN UINT32 Operand, 3273 IN UINTN StartBit, 3274 IN UINTN EndBit, 3275 IN UINT32 OrData 3276 ); 3277 3278 3279 /** 3280 Reads a bit field from a 32-bit value, performs a bitwise AND, and returns 3281 the result. 3282 3283 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3284 in Operand and the value specified by AndData. All other bits in Operand are 3285 preserved. The new 32-bit value is returned. 3286 3287 If 32-bit operations are not supported, then ASSERT(). 3288 If StartBit is greater than 31, then ASSERT(). 3289 If EndBit is greater than 31, then ASSERT(). 3290 If EndBit is less than StartBit, then ASSERT(). 3291 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3292 3293 @param Operand Operand on which to perform the bitfield operation. 3294 @param StartBit The ordinal of the least significant bit in the bit field. 3295 Range 0..31. 3296 @param EndBit The ordinal of the most significant bit in the bit field. 3297 Range 0..31. 3298 @param AndData The value to AND with the read value from the value 3299 3300 @return The new 32-bit value. 3301 3302 **/ 3303 UINT32 3304 EFIAPI 3305 BitFieldAnd32 ( 3306 IN UINT32 Operand, 3307 IN UINTN StartBit, 3308 IN UINTN EndBit, 3309 IN UINT32 AndData 3310 ); 3311 3312 3313 /** 3314 Reads a bit field from a 32-bit value, performs a bitwise AND followed by a 3315 bitwise OR, and returns the result. 3316 3317 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3318 in Operand and the value specified by AndData, followed by a bitwise 3319 OR with value specified by OrData. All other bits in Operand are 3320 preserved. The new 32-bit value is returned. 3321 3322 If 32-bit operations are not supported, then ASSERT(). 3323 If StartBit is greater than 31, then ASSERT(). 3324 If EndBit is greater than 31, then ASSERT(). 3325 If EndBit is less than StartBit, then ASSERT(). 3326 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3327 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3328 3329 @param Operand Operand on which to perform the bitfield operation. 3330 @param StartBit The ordinal of the least significant bit in the bit field. 3331 Range 0..31. 3332 @param EndBit The ordinal of the most significant bit in the bit field. 3333 Range 0..31. 3334 @param AndData The value to AND with the read value from the value. 3335 @param OrData The value to OR with the result of the AND operation. 3336 3337 @return The new 32-bit value. 3338 3339 **/ 3340 UINT32 3341 EFIAPI 3342 BitFieldAndThenOr32 ( 3343 IN UINT32 Operand, 3344 IN UINTN StartBit, 3345 IN UINTN EndBit, 3346 IN UINT32 AndData, 3347 IN UINT32 OrData 3348 ); 3349 3350 3351 /** 3352 Returns a bit field from a 64-bit value. 3353 3354 Returns the bitfield specified by the StartBit and the EndBit from Operand. 3355 3356 If 64-bit operations are not supported, then ASSERT(). 3357 If StartBit is greater than 63, then ASSERT(). 3358 If EndBit is greater than 63, then ASSERT(). 3359 If EndBit is less than StartBit, then ASSERT(). 3360 3361 @param Operand Operand on which to perform the bitfield operation. 3362 @param StartBit The ordinal of the least significant bit in the bit field. 3363 Range 0..63. 3364 @param EndBit The ordinal of the most significant bit in the bit field. 3365 Range 0..63. 3366 3367 @return The bit field read. 3368 3369 **/ 3370 UINT64 3371 EFIAPI 3372 BitFieldRead64 ( 3373 IN UINT64 Operand, 3374 IN UINTN StartBit, 3375 IN UINTN EndBit 3376 ); 3377 3378 3379 /** 3380 Writes a bit field to a 64-bit value, and returns the result. 3381 3382 Writes Value to the bit field specified by the StartBit and the EndBit in 3383 Operand. All other bits in Operand are preserved. The new 64-bit value is 3384 returned. 3385 3386 If 64-bit operations are not supported, then ASSERT(). 3387 If StartBit is greater than 63, then ASSERT(). 3388 If EndBit is greater than 63, then ASSERT(). 3389 If EndBit is less than StartBit, then ASSERT(). 3390 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3391 3392 @param Operand Operand on which to perform the bitfield operation. 3393 @param StartBit The ordinal of the least significant bit in the bit field. 3394 Range 0..63. 3395 @param EndBit The ordinal of the most significant bit in the bit field. 3396 Range 0..63. 3397 @param Value New value of the bit field. 3398 3399 @return The new 64-bit value. 3400 3401 **/ 3402 UINT64 3403 EFIAPI 3404 BitFieldWrite64 ( 3405 IN UINT64 Operand, 3406 IN UINTN StartBit, 3407 IN UINTN EndBit, 3408 IN UINT64 Value 3409 ); 3410 3411 3412 /** 3413 Reads a bit field from a 64-bit value, performs a bitwise OR, and returns the 3414 result. 3415 3416 Performs a bitwise OR between the bit field specified by StartBit 3417 and EndBit in Operand and the value specified by OrData. All other bits in 3418 Operand are preserved. The new 64-bit value is returned. 3419 3420 If 64-bit operations are not supported, then ASSERT(). 3421 If StartBit is greater than 63, then ASSERT(). 3422 If EndBit is greater than 63, then ASSERT(). 3423 If EndBit is less than StartBit, then ASSERT(). 3424 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3425 3426 @param Operand Operand on which to perform the bitfield operation. 3427 @param StartBit The ordinal of the least significant bit in the bit field. 3428 Range 0..63. 3429 @param EndBit The ordinal of the most significant bit in the bit field. 3430 Range 0..63. 3431 @param OrData The value to OR with the read value from the value 3432 3433 @return The new 64-bit value. 3434 3435 **/ 3436 UINT64 3437 EFIAPI 3438 BitFieldOr64 ( 3439 IN UINT64 Operand, 3440 IN UINTN StartBit, 3441 IN UINTN EndBit, 3442 IN UINT64 OrData 3443 ); 3444 3445 3446 /** 3447 Reads a bit field from a 64-bit value, performs a bitwise AND, and returns 3448 the result. 3449 3450 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3451 in Operand and the value specified by AndData. All other bits in Operand are 3452 preserved. The new 64-bit value is returned. 3453 3454 If 64-bit operations are not supported, then ASSERT(). 3455 If StartBit is greater than 63, then ASSERT(). 3456 If EndBit is greater than 63, then ASSERT(). 3457 If EndBit is less than StartBit, then ASSERT(). 3458 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3459 3460 @param Operand Operand on which to perform the bitfield operation. 3461 @param StartBit The ordinal of the least significant bit in the bit field. 3462 Range 0..63. 3463 @param EndBit The ordinal of the most significant bit in the bit field. 3464 Range 0..63. 3465 @param AndData The value to AND with the read value from the value 3466 3467 @return The new 64-bit value. 3468 3469 **/ 3470 UINT64 3471 EFIAPI 3472 BitFieldAnd64 ( 3473 IN UINT64 Operand, 3474 IN UINTN StartBit, 3475 IN UINTN EndBit, 3476 IN UINT64 AndData 3477 ); 3478 3479 3480 /** 3481 Reads a bit field from a 64-bit value, performs a bitwise AND followed by a 3482 bitwise OR, and returns the result. 3483 3484 Performs a bitwise AND between the bit field specified by StartBit and EndBit 3485 in Operand and the value specified by AndData, followed by a bitwise 3486 OR with value specified by OrData. All other bits in Operand are 3487 preserved. The new 64-bit value is returned. 3488 3489 If 64-bit operations are not supported, then ASSERT(). 3490 If StartBit is greater than 63, then ASSERT(). 3491 If EndBit is greater than 63, then ASSERT(). 3492 If EndBit is less than StartBit, then ASSERT(). 3493 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3494 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 3495 3496 @param Operand Operand on which to perform the bitfield operation. 3497 @param StartBit The ordinal of the least significant bit in the bit field. 3498 Range 0..63. 3499 @param EndBit The ordinal of the most significant bit in the bit field. 3500 Range 0..63. 3501 @param AndData The value to AND with the read value from the value. 3502 @param OrData The value to OR with the result of the AND operation. 3503 3504 @return The new 64-bit value. 3505 3506 **/ 3507 UINT64 3508 EFIAPI 3509 BitFieldAndThenOr64 ( 3510 IN UINT64 Operand, 3511 IN UINTN StartBit, 3512 IN UINTN EndBit, 3513 IN UINT64 AndData, 3514 IN UINT64 OrData 3515 ); 3516 3517 // 3518 // Base Library Checksum Functions 3519 // 3520 3521 /** 3522 Returns the sum of all elements in a buffer in unit of UINT8. 3523 During calculation, the carry bits are dropped. 3524 3525 This function calculates the sum of all elements in a buffer 3526 in unit of UINT8. The carry bits in result of addition are dropped. 3527 The result is returned as UINT8. If Length is Zero, then Zero is 3528 returned. 3529 3530 If Buffer is NULL, then ASSERT(). 3531 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3532 3533 @param Buffer The pointer to the buffer to carry out the sum operation. 3534 @param Length The size, in bytes, of Buffer. 3535 3536 @return Sum The sum of Buffer with carry bits dropped during additions. 3537 3538 **/ 3539 UINT8 3540 EFIAPI 3541 CalculateSum8 ( 3542 IN CONST UINT8 *Buffer, 3543 IN UINTN Length 3544 ); 3545 3546 3547 /** 3548 Returns the two's complement checksum of all elements in a buffer 3549 of 8-bit values. 3550 3551 This function first calculates the sum of the 8-bit values in the 3552 buffer specified by Buffer and Length. The carry bits in the result 3553 of addition are dropped. Then, the two's complement of the sum is 3554 returned. If Length is 0, then 0 is returned. 3555 3556 If Buffer is NULL, then ASSERT(). 3557 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3558 3559 @param Buffer The pointer to the buffer to carry out the checksum operation. 3560 @param Length The size, in bytes, of Buffer. 3561 3562 @return Checksum The two's complement checksum of Buffer. 3563 3564 **/ 3565 UINT8 3566 EFIAPI 3567 CalculateCheckSum8 ( 3568 IN CONST UINT8 *Buffer, 3569 IN UINTN Length 3570 ); 3571 3572 3573 /** 3574 Returns the sum of all elements in a buffer of 16-bit values. During 3575 calculation, the carry bits are dropped. 3576 3577 This function calculates the sum of the 16-bit values in the buffer 3578 specified by Buffer and Length. The carry bits in result of addition are dropped. 3579 The 16-bit result is returned. If Length is 0, then 0 is returned. 3580 3581 If Buffer is NULL, then ASSERT(). 3582 If Buffer is not aligned on a 16-bit boundary, then ASSERT(). 3583 If Length is not aligned on a 16-bit boundary, then ASSERT(). 3584 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3585 3586 @param Buffer The pointer to the buffer to carry out the sum operation. 3587 @param Length The size, in bytes, of Buffer. 3588 3589 @return Sum The sum of Buffer with carry bits dropped during additions. 3590 3591 **/ 3592 UINT16 3593 EFIAPI 3594 CalculateSum16 ( 3595 IN CONST UINT16 *Buffer, 3596 IN UINTN Length 3597 ); 3598 3599 3600 /** 3601 Returns the two's complement checksum of all elements in a buffer of 3602 16-bit values. 3603 3604 This function first calculates the sum of the 16-bit values in the buffer 3605 specified by Buffer and Length. The carry bits in the result of addition 3606 are dropped. Then, the two's complement of the sum is returned. If Length 3607 is 0, then 0 is returned. 3608 3609 If Buffer is NULL, then ASSERT(). 3610 If Buffer is not aligned on a 16-bit boundary, then ASSERT(). 3611 If Length is not aligned on a 16-bit boundary, then ASSERT(). 3612 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3613 3614 @param Buffer The pointer to the buffer to carry out the checksum operation. 3615 @param Length The size, in bytes, of Buffer. 3616 3617 @return Checksum The two's complement checksum of Buffer. 3618 3619 **/ 3620 UINT16 3621 EFIAPI 3622 CalculateCheckSum16 ( 3623 IN CONST UINT16 *Buffer, 3624 IN UINTN Length 3625 ); 3626 3627 3628 /** 3629 Returns the sum of all elements in a buffer of 32-bit values. During 3630 calculation, the carry bits are dropped. 3631 3632 This function calculates the sum of the 32-bit values in the buffer 3633 specified by Buffer and Length. The carry bits in result of addition are dropped. 3634 The 32-bit result is returned. If Length is 0, then 0 is returned. 3635 3636 If Buffer is NULL, then ASSERT(). 3637 If Buffer is not aligned on a 32-bit boundary, then ASSERT(). 3638 If Length is not aligned on a 32-bit boundary, then ASSERT(). 3639 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3640 3641 @param Buffer The pointer to the buffer to carry out the sum operation. 3642 @param Length The size, in bytes, of Buffer. 3643 3644 @return Sum The sum of Buffer with carry bits dropped during additions. 3645 3646 **/ 3647 UINT32 3648 EFIAPI 3649 CalculateSum32 ( 3650 IN CONST UINT32 *Buffer, 3651 IN UINTN Length 3652 ); 3653 3654 3655 /** 3656 Returns the two's complement checksum of all elements in a buffer of 3657 32-bit values. 3658 3659 This function first calculates the sum of the 32-bit values in the buffer 3660 specified by Buffer and Length. The carry bits in the result of addition 3661 are dropped. Then, the two's complement of the sum is returned. If Length 3662 is 0, then 0 is returned. 3663 3664 If Buffer is NULL, then ASSERT(). 3665 If Buffer is not aligned on a 32-bit boundary, then ASSERT(). 3666 If Length is not aligned on a 32-bit boundary, then ASSERT(). 3667 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3668 3669 @param Buffer The pointer to the buffer to carry out the checksum operation. 3670 @param Length The size, in bytes, of Buffer. 3671 3672 @return Checksum The two's complement checksum of Buffer. 3673 3674 **/ 3675 UINT32 3676 EFIAPI 3677 CalculateCheckSum32 ( 3678 IN CONST UINT32 *Buffer, 3679 IN UINTN Length 3680 ); 3681 3682 3683 /** 3684 Returns the sum of all elements in a buffer of 64-bit values. During 3685 calculation, the carry bits are dropped. 3686 3687 This function calculates the sum of the 64-bit values in the buffer 3688 specified by Buffer and Length. The carry bits in result of addition are dropped. 3689 The 64-bit result is returned. If Length is 0, then 0 is returned. 3690 3691 If Buffer is NULL, then ASSERT(). 3692 If Buffer is not aligned on a 64-bit boundary, then ASSERT(). 3693 If Length is not aligned on a 64-bit boundary, then ASSERT(). 3694 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3695 3696 @param Buffer The pointer to the buffer to carry out the sum operation. 3697 @param Length The size, in bytes, of Buffer. 3698 3699 @return Sum The sum of Buffer with carry bits dropped during additions. 3700 3701 **/ 3702 UINT64 3703 EFIAPI 3704 CalculateSum64 ( 3705 IN CONST UINT64 *Buffer, 3706 IN UINTN Length 3707 ); 3708 3709 3710 /** 3711 Returns the two's complement checksum of all elements in a buffer of 3712 64-bit values. 3713 3714 This function first calculates the sum of the 64-bit values in the buffer 3715 specified by Buffer and Length. The carry bits in the result of addition 3716 are dropped. Then, the two's complement of the sum is returned. If Length 3717 is 0, then 0 is returned. 3718 3719 If Buffer is NULL, then ASSERT(). 3720 If Buffer is not aligned on a 64-bit boundary, then ASSERT(). 3721 If Length is not aligned on a 64-bit boundary, then ASSERT(). 3722 If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 3723 3724 @param Buffer The pointer to the buffer to carry out the checksum operation. 3725 @param Length The size, in bytes, of Buffer. 3726 3727 @return Checksum The two's complement checksum of Buffer. 3728 3729 **/ 3730 UINT64 3731 EFIAPI 3732 CalculateCheckSum64 ( 3733 IN CONST UINT64 *Buffer, 3734 IN UINTN Length 3735 ); 3736 3737 3738 // 3739 // Base Library CPU Functions 3740 // 3741 3742 /** 3743 Function entry point used when a stack switch is requested with SwitchStack() 3744 3745 @param Context1 Context1 parameter passed into SwitchStack(). 3746 @param Context2 Context2 parameter passed into SwitchStack(). 3747 3748 **/ 3749 typedef 3750 VOID 3751 (EFIAPI *SWITCH_STACK_ENTRY_POINT)( 3752 IN VOID *Context1, OPTIONAL 3753 IN VOID *Context2 OPTIONAL 3754 ); 3755 3756 3757 /** 3758 Used to serialize load and store operations. 3759 3760 All loads and stores that proceed calls to this function are guaranteed to be 3761 globally visible when this function returns. 3762 3763 **/ 3764 VOID 3765 EFIAPI 3766 MemoryFence ( 3767 VOID 3768 ); 3769 3770 3771 /** 3772 Saves the current CPU context that can be restored with a call to LongJump() 3773 and returns 0. 3774 3775 Saves the current CPU context in the buffer specified by JumpBuffer and 3776 returns 0. The initial call to SetJump() must always return 0. Subsequent 3777 calls to LongJump() cause a non-zero value to be returned by SetJump(). 3778 3779 If JumpBuffer is NULL, then ASSERT(). 3780 For Itanium processors, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). 3781 3782 NOTE: The structure BASE_LIBRARY_JUMP_BUFFER is CPU architecture specific. 3783 The same structure must never be used for more than one CPU architecture context. 3784 For example, a BASE_LIBRARY_JUMP_BUFFER allocated by an IA-32 module must never be used from an x64 module. 3785 SetJump()/LongJump() is not currently supported for the EBC processor type. 3786 3787 @param JumpBuffer A pointer to CPU context buffer. 3788 3789 @retval 0 Indicates a return from SetJump(). 3790 3791 **/ 3792 UINTN 3793 EFIAPI 3794 SetJump ( 3795 OUT BASE_LIBRARY_JUMP_BUFFER *JumpBuffer 3796 ); 3797 3798 3799 /** 3800 Restores the CPU context that was saved with SetJump(). 3801 3802 Restores the CPU context from the buffer specified by JumpBuffer. This 3803 function never returns to the caller. Instead is resumes execution based on 3804 the state of JumpBuffer. 3805 3806 If JumpBuffer is NULL, then ASSERT(). 3807 For Itanium processors, if JumpBuffer is not aligned on a 16-byte boundary, then ASSERT(). 3808 If Value is 0, then ASSERT(). 3809 3810 @param JumpBuffer A pointer to CPU context buffer. 3811 @param Value The value to return when the SetJump() context is 3812 restored and must be non-zero. 3813 3814 **/ 3815 VOID 3816 EFIAPI 3817 LongJump ( 3818 IN BASE_LIBRARY_JUMP_BUFFER *JumpBuffer, 3819 IN UINTN Value 3820 ); 3821 3822 3823 /** 3824 Enables CPU interrupts. 3825 3826 **/ 3827 VOID 3828 EFIAPI 3829 EnableInterrupts ( 3830 VOID 3831 ); 3832 3833 3834 /** 3835 Disables CPU interrupts. 3836 3837 **/ 3838 VOID 3839 EFIAPI 3840 DisableInterrupts ( 3841 VOID 3842 ); 3843 3844 3845 /** 3846 Disables CPU interrupts and returns the interrupt state prior to the disable 3847 operation. 3848 3849 @retval TRUE CPU interrupts were enabled on entry to this call. 3850 @retval FALSE CPU interrupts were disabled on entry to this call. 3851 3852 **/ 3853 BOOLEAN 3854 EFIAPI 3855 SaveAndDisableInterrupts ( 3856 VOID 3857 ); 3858 3859 3860 /** 3861 Enables CPU interrupts for the smallest window required to capture any 3862 pending interrupts. 3863 3864 **/ 3865 VOID 3866 EFIAPI 3867 EnableDisableInterrupts ( 3868 VOID 3869 ); 3870 3871 3872 /** 3873 Retrieves the current CPU interrupt state. 3874 3875 Returns TRUE if interrupts are currently enabled. Otherwise 3876 returns FALSE. 3877 3878 @retval TRUE CPU interrupts are enabled. 3879 @retval FALSE CPU interrupts are disabled. 3880 3881 **/ 3882 BOOLEAN 3883 EFIAPI 3884 GetInterruptState ( 3885 VOID 3886 ); 3887 3888 3889 /** 3890 Set the current CPU interrupt state. 3891 3892 Sets the current CPU interrupt state to the state specified by 3893 InterruptState. If InterruptState is TRUE, then interrupts are enabled. If 3894 InterruptState is FALSE, then interrupts are disabled. InterruptState is 3895 returned. 3896 3897 @param InterruptState TRUE if interrupts should enabled. FALSE if 3898 interrupts should be disabled. 3899 3900 @return InterruptState 3901 3902 **/ 3903 BOOLEAN 3904 EFIAPI 3905 SetInterruptState ( 3906 IN BOOLEAN InterruptState 3907 ); 3908 3909 3910 /** 3911 Requests CPU to pause for a short period of time. 3912 3913 Requests CPU to pause for a short period of time. Typically used in MP 3914 systems to prevent memory starvation while waiting for a spin lock. 3915 3916 **/ 3917 VOID 3918 EFIAPI 3919 CpuPause ( 3920 VOID 3921 ); 3922 3923 3924 /** 3925 Transfers control to a function starting with a new stack. 3926 3927 Transfers control to the function specified by EntryPoint using the 3928 new stack specified by NewStack and passing in the parameters specified 3929 by Context1 and Context2. Context1 and Context2 are optional and may 3930 be NULL. The function EntryPoint must never return. This function 3931 supports a variable number of arguments following the NewStack parameter. 3932 These additional arguments are ignored on IA-32, x64, and EBC architectures. 3933 Itanium processors expect one additional parameter of type VOID * that specifies 3934 the new backing store pointer. 3935 3936 If EntryPoint is NULL, then ASSERT(). 3937 If NewStack is NULL, then ASSERT(). 3938 3939 @param EntryPoint A pointer to function to call with the new stack. 3940 @param Context1 A pointer to the context to pass into the EntryPoint 3941 function. 3942 @param Context2 A pointer to the context to pass into the EntryPoint 3943 function. 3944 @param NewStack A pointer to the new stack to use for the EntryPoint 3945 function. 3946 @param ... This variable argument list is ignored for IA-32, x64, and 3947 EBC architectures. For Itanium processors, this variable 3948 argument list is expected to contain a single parameter of 3949 type VOID * that specifies the new backing store pointer. 3950 3951 3952 **/ 3953 VOID 3954 EFIAPI 3955 SwitchStack ( 3956 IN SWITCH_STACK_ENTRY_POINT EntryPoint, 3957 IN VOID *Context1, OPTIONAL 3958 IN VOID *Context2, OPTIONAL 3959 IN VOID *NewStack, 3960 ... 3961 ); 3962 3963 3964 /** 3965 Generates a breakpoint on the CPU. 3966 3967 Generates a breakpoint on the CPU. The breakpoint must be implemented such 3968 that code can resume normal execution after the breakpoint. 3969 3970 **/ 3971 VOID 3972 EFIAPI 3973 CpuBreakpoint ( 3974 VOID 3975 ); 3976 3977 3978 /** 3979 Executes an infinite loop. 3980 3981 Forces the CPU to execute an infinite loop. A debugger may be used to skip 3982 past the loop and the code that follows the loop must execute properly. This 3983 implies that the infinite loop must not cause the code that follow it to be 3984 optimized away. 3985 3986 **/ 3987 VOID 3988 EFIAPI 3989 CpuDeadLoop ( 3990 VOID 3991 ); 3992 3993 #if defined (MDE_CPU_IPF) 3994 3995 /** 3996 Flush a range of cache lines in the cache coherency domain of the calling 3997 CPU. 3998 3999 Flushes the cache lines specified by Address and Length. If Address is not aligned 4000 on a cache line boundary, then entire cache line containing Address is flushed. 4001 If Address + Length is not aligned on a cache line boundary, then the entire cache 4002 line containing Address + Length - 1 is flushed. This function may choose to flush 4003 the entire cache if that is more efficient than flushing the specified range. If 4004 Length is 0, the no cache lines are flushed. Address is returned. 4005 This function is only available on Itanium processors. 4006 4007 If Length is greater than (MAX_ADDRESS - Address + 1), then ASSERT(). 4008 4009 @param Address The base address of the instruction lines to invalidate. If 4010 the CPU is in a physical addressing mode, then Address is a 4011 physical address. If the CPU is in a virtual addressing mode, 4012 then Address is a virtual address. 4013 4014 @param Length The number of bytes to invalidate from the instruction cache. 4015 4016 @return Address. 4017 4018 **/ 4019 VOID * 4020 EFIAPI 4021 AsmFlushCacheRange ( 4022 IN VOID *Address, 4023 IN UINTN Length 4024 ); 4025 4026 4027 /** 4028 Executes an FC instruction. 4029 Executes an FC instruction on the cache line specified by Address. 4030 The cache line size affected is at least 32-bytes (aligned on a 32-byte boundary). 4031 An implementation may flush a larger region. This function is only available on Itanium processors. 4032 4033 @param Address The Address of cache line to be flushed. 4034 4035 @return The address of FC instruction executed. 4036 4037 **/ 4038 UINT64 4039 EFIAPI 4040 AsmFc ( 4041 IN UINT64 Address 4042 ); 4043 4044 4045 /** 4046 Executes an FC.I instruction. 4047 Executes an FC.I instruction on the cache line specified by Address. 4048 The cache line size affected is at least 32-bytes (aligned on a 32-byte boundary). 4049 An implementation may flush a larger region. This function is only available on Itanium processors. 4050 4051 @param Address The Address of cache line to be flushed. 4052 4053 @return The address of the FC.I instruction executed. 4054 4055 **/ 4056 UINT64 4057 EFIAPI 4058 AsmFci ( 4059 IN UINT64 Address 4060 ); 4061 4062 4063 /** 4064 Reads the current value of a Processor Identifier Register (CPUID). 4065 4066 Reads and returns the current value of Processor Identifier Register specified by Index. 4067 The Index of largest implemented CPUID (One less than the number of implemented CPUID 4068 registers) is determined by CPUID [3] bits {7:0}. 4069 No parameter checking is performed on Index. If the Index value is beyond the 4070 implemented CPUID register range, a Reserved Register/Field fault may occur. The caller 4071 must either guarantee that Index is valid, or the caller must set up fault handlers to 4072 catch the faults. This function is only available on Itanium processors. 4073 4074 @param Index The 8-bit Processor Identifier Register index to read. 4075 4076 @return The current value of Processor Identifier Register specified by Index. 4077 4078 **/ 4079 UINT64 4080 EFIAPI 4081 AsmReadCpuid ( 4082 IN UINT8 Index 4083 ); 4084 4085 4086 /** 4087 Reads the current value of 64-bit Processor Status Register (PSR). 4088 This function is only available on Itanium processors. 4089 4090 @return The current value of PSR. 4091 4092 **/ 4093 UINT64 4094 EFIAPI 4095 AsmReadPsr ( 4096 VOID 4097 ); 4098 4099 4100 /** 4101 Writes the current value of 64-bit Processor Status Register (PSR). 4102 4103 No parameter checking is performed on Value. All bits of Value corresponding to 4104 reserved fields of PSR must be 0 or a Reserved Register/Field fault may occur. 4105 The caller must either guarantee that Value is valid, or the caller must set up 4106 fault handlers to catch the faults. This function is only available on Itanium processors. 4107 4108 @param Value The 64-bit value to write to PSR. 4109 4110 @return The 64-bit value written to the PSR. 4111 4112 **/ 4113 UINT64 4114 EFIAPI 4115 AsmWritePsr ( 4116 IN UINT64 Value 4117 ); 4118 4119 4120 /** 4121 Reads the current value of 64-bit Kernel Register #0 (KR0). 4122 4123 Reads and returns the current value of KR0. 4124 This function is only available on Itanium processors. 4125 4126 @return The current value of KR0. 4127 4128 **/ 4129 UINT64 4130 EFIAPI 4131 AsmReadKr0 ( 4132 VOID 4133 ); 4134 4135 4136 /** 4137 Reads the current value of 64-bit Kernel Register #1 (KR1). 4138 4139 Reads and returns the current value of KR1. 4140 This function is only available on Itanium processors. 4141 4142 @return The current value of KR1. 4143 4144 **/ 4145 UINT64 4146 EFIAPI 4147 AsmReadKr1 ( 4148 VOID 4149 ); 4150 4151 4152 /** 4153 Reads the current value of 64-bit Kernel Register #2 (KR2). 4154 4155 Reads and returns the current value of KR2. 4156 This function is only available on Itanium processors. 4157 4158 @return The current value of KR2. 4159 4160 **/ 4161 UINT64 4162 EFIAPI 4163 AsmReadKr2 ( 4164 VOID 4165 ); 4166 4167 4168 /** 4169 Reads the current value of 64-bit Kernel Register #3 (KR3). 4170 4171 Reads and returns the current value of KR3. 4172 This function is only available on Itanium processors. 4173 4174 @return The current value of KR3. 4175 4176 **/ 4177 UINT64 4178 EFIAPI 4179 AsmReadKr3 ( 4180 VOID 4181 ); 4182 4183 4184 /** 4185 Reads the current value of 64-bit Kernel Register #4 (KR4). 4186 4187 Reads and returns the current value of KR4. 4188 This function is only available on Itanium processors. 4189 4190 @return The current value of KR4. 4191 4192 **/ 4193 UINT64 4194 EFIAPI 4195 AsmReadKr4 ( 4196 VOID 4197 ); 4198 4199 4200 /** 4201 Reads the current value of 64-bit Kernel Register #5 (KR5). 4202 4203 Reads and returns the current value of KR5. 4204 This function is only available on Itanium processors. 4205 4206 @return The current value of KR5. 4207 4208 **/ 4209 UINT64 4210 EFIAPI 4211 AsmReadKr5 ( 4212 VOID 4213 ); 4214 4215 4216 /** 4217 Reads the current value of 64-bit Kernel Register #6 (KR6). 4218 4219 Reads and returns the current value of KR6. 4220 This function is only available on Itanium processors. 4221 4222 @return The current value of KR6. 4223 4224 **/ 4225 UINT64 4226 EFIAPI 4227 AsmReadKr6 ( 4228 VOID 4229 ); 4230 4231 4232 /** 4233 Reads the current value of 64-bit Kernel Register #7 (KR7). 4234 4235 Reads and returns the current value of KR7. 4236 This function is only available on Itanium processors. 4237 4238 @return The current value of KR7. 4239 4240 **/ 4241 UINT64 4242 EFIAPI 4243 AsmReadKr7 ( 4244 VOID 4245 ); 4246 4247 4248 /** 4249 Write the current value of 64-bit Kernel Register #0 (KR0). 4250 4251 Writes the current value of KR0. The 64-bit value written to 4252 the KR0 is returned. This function is only available on Itanium processors. 4253 4254 @param Value The 64-bit value to write to KR0. 4255 4256 @return The 64-bit value written to the KR0. 4257 4258 **/ 4259 UINT64 4260 EFIAPI 4261 AsmWriteKr0 ( 4262 IN UINT64 Value 4263 ); 4264 4265 4266 /** 4267 Write the current value of 64-bit Kernel Register #1 (KR1). 4268 4269 Writes the current value of KR1. The 64-bit value written to 4270 the KR1 is returned. This function is only available on Itanium processors. 4271 4272 @param Value The 64-bit value to write to KR1. 4273 4274 @return The 64-bit value written to the KR1. 4275 4276 **/ 4277 UINT64 4278 EFIAPI 4279 AsmWriteKr1 ( 4280 IN UINT64 Value 4281 ); 4282 4283 4284 /** 4285 Write the current value of 64-bit Kernel Register #2 (KR2). 4286 4287 Writes the current value of KR2. The 64-bit value written to 4288 the KR2 is returned. This function is only available on Itanium processors. 4289 4290 @param Value The 64-bit value to write to KR2. 4291 4292 @return The 64-bit value written to the KR2. 4293 4294 **/ 4295 UINT64 4296 EFIAPI 4297 AsmWriteKr2 ( 4298 IN UINT64 Value 4299 ); 4300 4301 4302 /** 4303 Write the current value of 64-bit Kernel Register #3 (KR3). 4304 4305 Writes the current value of KR3. The 64-bit value written to 4306 the KR3 is returned. This function is only available on Itanium processors. 4307 4308 @param Value The 64-bit value to write to KR3. 4309 4310 @return The 64-bit value written to the KR3. 4311 4312 **/ 4313 UINT64 4314 EFIAPI 4315 AsmWriteKr3 ( 4316 IN UINT64 Value 4317 ); 4318 4319 4320 /** 4321 Write the current value of 64-bit Kernel Register #4 (KR4). 4322 4323 Writes the current value of KR4. The 64-bit value written to 4324 the KR4 is returned. This function is only available on Itanium processors. 4325 4326 @param Value The 64-bit value to write to KR4. 4327 4328 @return The 64-bit value written to the KR4. 4329 4330 **/ 4331 UINT64 4332 EFIAPI 4333 AsmWriteKr4 ( 4334 IN UINT64 Value 4335 ); 4336 4337 4338 /** 4339 Write the current value of 64-bit Kernel Register #5 (KR5). 4340 4341 Writes the current value of KR5. The 64-bit value written to 4342 the KR5 is returned. This function is only available on Itanium processors. 4343 4344 @param Value The 64-bit value to write to KR5. 4345 4346 @return The 64-bit value written to the KR5. 4347 4348 **/ 4349 UINT64 4350 EFIAPI 4351 AsmWriteKr5 ( 4352 IN UINT64 Value 4353 ); 4354 4355 4356 /** 4357 Write the current value of 64-bit Kernel Register #6 (KR6). 4358 4359 Writes the current value of KR6. The 64-bit value written to 4360 the KR6 is returned. This function is only available on Itanium processors. 4361 4362 @param Value The 64-bit value to write to KR6. 4363 4364 @return The 64-bit value written to the KR6. 4365 4366 **/ 4367 UINT64 4368 EFIAPI 4369 AsmWriteKr6 ( 4370 IN UINT64 Value 4371 ); 4372 4373 4374 /** 4375 Write the current value of 64-bit Kernel Register #7 (KR7). 4376 4377 Writes the current value of KR7. The 64-bit value written to 4378 the KR7 is returned. This function is only available on Itanium processors. 4379 4380 @param Value The 64-bit value to write to KR7. 4381 4382 @return The 64-bit value written to the KR7. 4383 4384 **/ 4385 UINT64 4386 EFIAPI 4387 AsmWriteKr7 ( 4388 IN UINT64 Value 4389 ); 4390 4391 4392 /** 4393 Reads the current value of Interval Timer Counter Register (ITC). 4394 4395 Reads and returns the current value of ITC. 4396 This function is only available on Itanium processors. 4397 4398 @return The current value of ITC. 4399 4400 **/ 4401 UINT64 4402 EFIAPI 4403 AsmReadItc ( 4404 VOID 4405 ); 4406 4407 4408 /** 4409 Reads the current value of Interval Timer Vector Register (ITV). 4410 4411 Reads and returns the current value of ITV. 4412 This function is only available on Itanium processors. 4413 4414 @return The current value of ITV. 4415 4416 **/ 4417 UINT64 4418 EFIAPI 4419 AsmReadItv ( 4420 VOID 4421 ); 4422 4423 4424 /** 4425 Reads the current value of Interval Timer Match Register (ITM). 4426 4427 Reads and returns the current value of ITM. 4428 This function is only available on Itanium processors. 4429 4430 @return The current value of ITM. 4431 **/ 4432 UINT64 4433 EFIAPI 4434 AsmReadItm ( 4435 VOID 4436 ); 4437 4438 4439 /** 4440 Writes the current value of 64-bit Interval Timer Counter Register (ITC). 4441 4442 Writes the current value of ITC. The 64-bit value written to the ITC is returned. 4443 This function is only available on Itanium processors. 4444 4445 @param Value The 64-bit value to write to ITC. 4446 4447 @return The 64-bit value written to the ITC. 4448 4449 **/ 4450 UINT64 4451 EFIAPI 4452 AsmWriteItc ( 4453 IN UINT64 Value 4454 ); 4455 4456 4457 /** 4458 Writes the current value of 64-bit Interval Timer Match Register (ITM). 4459 4460 Writes the current value of ITM. The 64-bit value written to the ITM is returned. 4461 This function is only available on Itanium processors. 4462 4463 @param Value The 64-bit value to write to ITM. 4464 4465 @return The 64-bit value written to the ITM. 4466 4467 **/ 4468 UINT64 4469 EFIAPI 4470 AsmWriteItm ( 4471 IN UINT64 Value 4472 ); 4473 4474 4475 /** 4476 Writes the current value of 64-bit Interval Timer Vector Register (ITV). 4477 4478 Writes the current value of ITV. The 64-bit value written to the ITV is returned. 4479 No parameter checking is performed on Value. All bits of Value corresponding to 4480 reserved fields of ITV must be 0 or a Reserved Register/Field fault may occur. 4481 The caller must either guarantee that Value is valid, or the caller must set up 4482 fault handlers to catch the faults. 4483 This function is only available on Itanium processors. 4484 4485 @param Value The 64-bit value to write to ITV. 4486 4487 @return The 64-bit value written to the ITV. 4488 4489 **/ 4490 UINT64 4491 EFIAPI 4492 AsmWriteItv ( 4493 IN UINT64 Value 4494 ); 4495 4496 4497 /** 4498 Reads the current value of Default Control Register (DCR). 4499 4500 Reads and returns the current value of DCR. This function is only available on Itanium processors. 4501 4502 @return The current value of DCR. 4503 4504 **/ 4505 UINT64 4506 EFIAPI 4507 AsmReadDcr ( 4508 VOID 4509 ); 4510 4511 4512 /** 4513 Reads the current value of Interruption Vector Address Register (IVA). 4514 4515 Reads and returns the current value of IVA. This function is only available on Itanium processors. 4516 4517 @return The current value of IVA. 4518 **/ 4519 UINT64 4520 EFIAPI 4521 AsmReadIva ( 4522 VOID 4523 ); 4524 4525 4526 /** 4527 Reads the current value of Page Table Address Register (PTA). 4528 4529 Reads and returns the current value of PTA. This function is only available on Itanium processors. 4530 4531 @return The current value of PTA. 4532 4533 **/ 4534 UINT64 4535 EFIAPI 4536 AsmReadPta ( 4537 VOID 4538 ); 4539 4540 4541 /** 4542 Writes the current value of 64-bit Default Control Register (DCR). 4543 4544 Writes the current value of DCR. The 64-bit value written to the DCR is returned. 4545 No parameter checking is performed on Value. All bits of Value corresponding to 4546 reserved fields of DCR must be 0 or a Reserved Register/Field fault may occur. 4547 The caller must either guarantee that Value is valid, or the caller must set up 4548 fault handlers to catch the faults. 4549 This function is only available on Itanium processors. 4550 4551 @param Value The 64-bit value to write to DCR. 4552 4553 @return The 64-bit value written to the DCR. 4554 4555 **/ 4556 UINT64 4557 EFIAPI 4558 AsmWriteDcr ( 4559 IN UINT64 Value 4560 ); 4561 4562 4563 /** 4564 Writes the current value of 64-bit Interruption Vector Address Register (IVA). 4565 4566 Writes the current value of IVA. The 64-bit value written to the IVA is returned. 4567 The size of vector table is 32 K bytes and is 32 K bytes aligned 4568 the low 15 bits of Value is ignored when written. 4569 This function is only available on Itanium processors. 4570 4571 @param Value The 64-bit value to write to IVA. 4572 4573 @return The 64-bit value written to the IVA. 4574 4575 **/ 4576 UINT64 4577 EFIAPI 4578 AsmWriteIva ( 4579 IN UINT64 Value 4580 ); 4581 4582 4583 /** 4584 Writes the current value of 64-bit Page Table Address Register (PTA). 4585 4586 Writes the current value of PTA. The 64-bit value written to the PTA is returned. 4587 No parameter checking is performed on Value. All bits of Value corresponding to 4588 reserved fields of DCR must be 0 or a Reserved Register/Field fault may occur. 4589 The caller must either guarantee that Value is valid, or the caller must set up 4590 fault handlers to catch the faults. 4591 This function is only available on Itanium processors. 4592 4593 @param Value The 64-bit value to write to PTA. 4594 4595 @return The 64-bit value written to the PTA. 4596 **/ 4597 UINT64 4598 EFIAPI 4599 AsmWritePta ( 4600 IN UINT64 Value 4601 ); 4602 4603 4604 /** 4605 Reads the current value of Local Interrupt ID Register (LID). 4606 4607 Reads and returns the current value of LID. This function is only available on Itanium processors. 4608 4609 @return The current value of LID. 4610 4611 **/ 4612 UINT64 4613 EFIAPI 4614 AsmReadLid ( 4615 VOID 4616 ); 4617 4618 4619 /** 4620 Reads the current value of External Interrupt Vector Register (IVR). 4621 4622 Reads and returns the current value of IVR. This function is only available on Itanium processors. 4623 4624 @return The current value of IVR. 4625 4626 **/ 4627 UINT64 4628 EFIAPI 4629 AsmReadIvr ( 4630 VOID 4631 ); 4632 4633 4634 /** 4635 Reads the current value of Task Priority Register (TPR). 4636 4637 Reads and returns the current value of TPR. This function is only available on Itanium processors. 4638 4639 @return The current value of TPR. 4640 4641 **/ 4642 UINT64 4643 EFIAPI 4644 AsmReadTpr ( 4645 VOID 4646 ); 4647 4648 4649 /** 4650 Reads the current value of External Interrupt Request Register #0 (IRR0). 4651 4652 Reads and returns the current value of IRR0. This function is only available on Itanium processors. 4653 4654 @return The current value of IRR0. 4655 4656 **/ 4657 UINT64 4658 EFIAPI 4659 AsmReadIrr0 ( 4660 VOID 4661 ); 4662 4663 4664 /** 4665 Reads the current value of External Interrupt Request Register #1 (IRR1). 4666 4667 Reads and returns the current value of IRR1. This function is only available on Itanium processors. 4668 4669 @return The current value of IRR1. 4670 4671 **/ 4672 UINT64 4673 EFIAPI 4674 AsmReadIrr1 ( 4675 VOID 4676 ); 4677 4678 4679 /** 4680 Reads the current value of External Interrupt Request Register #2 (IRR2). 4681 4682 Reads and returns the current value of IRR2. This function is only available on Itanium processors. 4683 4684 @return The current value of IRR2. 4685 4686 **/ 4687 UINT64 4688 EFIAPI 4689 AsmReadIrr2 ( 4690 VOID 4691 ); 4692 4693 4694 /** 4695 Reads the current value of External Interrupt Request Register #3 (IRR3). 4696 4697 Reads and returns the current value of IRR3. This function is only available on Itanium processors. 4698 4699 @return The current value of IRR3. 4700 4701 **/ 4702 UINT64 4703 EFIAPI 4704 AsmReadIrr3 ( 4705 VOID 4706 ); 4707 4708 4709 /** 4710 Reads the current value of Performance Monitor Vector Register (PMV). 4711 4712 Reads and returns the current value of PMV. This function is only available on Itanium processors. 4713 4714 @return The current value of PMV. 4715 4716 **/ 4717 UINT64 4718 EFIAPI 4719 AsmReadPmv ( 4720 VOID 4721 ); 4722 4723 4724 /** 4725 Reads the current value of Corrected Machine Check Vector Register (CMCV). 4726 4727 Reads and returns the current value of CMCV. This function is only available on Itanium processors. 4728 4729 @return The current value of CMCV. 4730 4731 **/ 4732 UINT64 4733 EFIAPI 4734 AsmReadCmcv ( 4735 VOID 4736 ); 4737 4738 4739 /** 4740 Reads the current value of Local Redirection Register #0 (LRR0). 4741 4742 Reads and returns the current value of LRR0. This function is only available on Itanium processors. 4743 4744 @return The current value of LRR0. 4745 4746 **/ 4747 UINT64 4748 EFIAPI 4749 AsmReadLrr0 ( 4750 VOID 4751 ); 4752 4753 4754 /** 4755 Reads the current value of Local Redirection Register #1 (LRR1). 4756 4757 Reads and returns the current value of LRR1. This function is only available on Itanium processors. 4758 4759 @return The current value of LRR1. 4760 4761 **/ 4762 UINT64 4763 EFIAPI 4764 AsmReadLrr1 ( 4765 VOID 4766 ); 4767 4768 4769 /** 4770 Writes the current value of 64-bit Page Local Interrupt ID Register (LID). 4771 4772 Writes the current value of LID. The 64-bit value written to the LID is returned. 4773 No parameter checking is performed on Value. All bits of Value corresponding to 4774 reserved fields of LID must be 0 or a Reserved Register/Field fault may occur. 4775 The caller must either guarantee that Value is valid, or the caller must set up 4776 fault handlers to catch the faults. 4777 This function is only available on Itanium processors. 4778 4779 @param Value The 64-bit value to write to LID. 4780 4781 @return The 64-bit value written to the LID. 4782 4783 **/ 4784 UINT64 4785 EFIAPI 4786 AsmWriteLid ( 4787 IN UINT64 Value 4788 ); 4789 4790 4791 /** 4792 Writes the current value of 64-bit Task Priority Register (TPR). 4793 4794 Writes the current value of TPR. The 64-bit value written to the TPR is returned. 4795 No parameter checking is performed on Value. All bits of Value corresponding to 4796 reserved fields of TPR must be 0 or a Reserved Register/Field fault may occur. 4797 The caller must either guarantee that Value is valid, or the caller must set up 4798 fault handlers to catch the faults. 4799 This function is only available on Itanium processors. 4800 4801 @param Value The 64-bit value to write to TPR. 4802 4803 @return The 64-bit value written to the TPR. 4804 4805 **/ 4806 UINT64 4807 EFIAPI 4808 AsmWriteTpr ( 4809 IN UINT64 Value 4810 ); 4811 4812 4813 /** 4814 Performs a write operation on End OF External Interrupt Register (EOI). 4815 4816 Writes a value of 0 to the EOI Register. This function is only available on Itanium processors. 4817 4818 **/ 4819 VOID 4820 EFIAPI 4821 AsmWriteEoi ( 4822 VOID 4823 ); 4824 4825 4826 /** 4827 Writes the current value of 64-bit Performance Monitor Vector Register (PMV). 4828 4829 Writes the current value of PMV. The 64-bit value written to the PMV is returned. 4830 No parameter checking is performed on Value. All bits of Value corresponding 4831 to reserved fields of PMV must be 0 or a Reserved Register/Field fault may occur. 4832 The caller must either guarantee that Value is valid, or the caller must set up 4833 fault handlers to catch the faults. 4834 This function is only available on Itanium processors. 4835 4836 @param Value The 64-bit value to write to PMV. 4837 4838 @return The 64-bit value written to the PMV. 4839 4840 **/ 4841 UINT64 4842 EFIAPI 4843 AsmWritePmv ( 4844 IN UINT64 Value 4845 ); 4846 4847 4848 /** 4849 Writes the current value of 64-bit Corrected Machine Check Vector Register (CMCV). 4850 4851 Writes the current value of CMCV. The 64-bit value written to the CMCV is returned. 4852 No parameter checking is performed on Value. All bits of Value corresponding 4853 to reserved fields of CMCV must be 0 or a Reserved Register/Field fault may occur. 4854 The caller must either guarantee that Value is valid, or the caller must set up 4855 fault handlers to catch the faults. 4856 This function is only available on Itanium processors. 4857 4858 @param Value The 64-bit value to write to CMCV. 4859 4860 @return The 64-bit value written to the CMCV. 4861 4862 **/ 4863 UINT64 4864 EFIAPI 4865 AsmWriteCmcv ( 4866 IN UINT64 Value 4867 ); 4868 4869 4870 /** 4871 Writes the current value of 64-bit Local Redirection Register #0 (LRR0). 4872 4873 Writes the current value of LRR0. The 64-bit value written to the LRR0 is returned. 4874 No parameter checking is performed on Value. All bits of Value corresponding 4875 to reserved fields of LRR0 must be 0 or a Reserved Register/Field fault may occur. 4876 The caller must either guarantee that Value is valid, or the caller must set up 4877 fault handlers to catch the faults. 4878 This function is only available on Itanium processors. 4879 4880 @param Value The 64-bit value to write to LRR0. 4881 4882 @return The 64-bit value written to the LRR0. 4883 4884 **/ 4885 UINT64 4886 EFIAPI 4887 AsmWriteLrr0 ( 4888 IN UINT64 Value 4889 ); 4890 4891 4892 /** 4893 Writes the current value of 64-bit Local Redirection Register #1 (LRR1). 4894 4895 Writes the current value of LRR1. The 64-bit value written to the LRR1 is returned. 4896 No parameter checking is performed on Value. All bits of Value corresponding 4897 to reserved fields of LRR1 must be 0 or a Reserved Register/Field fault may occur. 4898 The caller must either guarantee that Value is valid, or the caller must 4899 set up fault handlers to catch the faults. 4900 This function is only available on Itanium processors. 4901 4902 @param Value The 64-bit value to write to LRR1. 4903 4904 @return The 64-bit value written to the LRR1. 4905 4906 **/ 4907 UINT64 4908 EFIAPI 4909 AsmWriteLrr1 ( 4910 IN UINT64 Value 4911 ); 4912 4913 4914 /** 4915 Reads the current value of Instruction Breakpoint Register (IBR). 4916 4917 The Instruction Breakpoint Registers are used in pairs. The even numbered 4918 registers contain breakpoint addresses, and the odd numbered registers contain 4919 breakpoint mask conditions. At least four instruction registers pairs are implemented 4920 on all processor models. Implemented registers are contiguous starting with 4921 register 0. No parameter checking is performed on Index, and if the Index value 4922 is beyond the implemented IBR register range, a Reserved Register/Field fault may 4923 occur. The caller must either guarantee that Index is valid, or the caller must 4924 set up fault handlers to catch the faults. 4925 This function is only available on Itanium processors. 4926 4927 @param Index The 8-bit Instruction Breakpoint Register index to read. 4928 4929 @return The current value of Instruction Breakpoint Register specified by Index. 4930 4931 **/ 4932 UINT64 4933 EFIAPI 4934 AsmReadIbr ( 4935 IN UINT8 Index 4936 ); 4937 4938 4939 /** 4940 Reads the current value of Data Breakpoint Register (DBR). 4941 4942 The Data Breakpoint Registers are used in pairs. The even numbered registers 4943 contain breakpoint addresses, and odd numbered registers contain breakpoint 4944 mask conditions. At least four data registers pairs are implemented on all processor 4945 models. Implemented registers are contiguous starting with register 0. 4946 No parameter checking is performed on Index. If the Index value is beyond 4947 the implemented DBR register range, a Reserved Register/Field fault may occur. 4948 The caller must either guarantee that Index is valid, or the caller must set up 4949 fault handlers to catch the faults. 4950 This function is only available on Itanium processors. 4951 4952 @param Index The 8-bit Data Breakpoint Register index to read. 4953 4954 @return The current value of Data Breakpoint Register specified by Index. 4955 4956 **/ 4957 UINT64 4958 EFIAPI 4959 AsmReadDbr ( 4960 IN UINT8 Index 4961 ); 4962 4963 4964 /** 4965 Reads the current value of Performance Monitor Configuration Register (PMC). 4966 4967 All processor implementations provide at least four performance counters 4968 (PMC/PMD [4]...PMC/PMD [7] pairs), and four performance monitor counter overflow 4969 status registers (PMC [0]... PMC [3]). Processor implementations may provide 4970 additional implementation-dependent PMC and PMD to increase the number of 4971 'generic' performance counters (PMC/PMD pairs). The remainder of PMC and PMD 4972 register set is implementation dependent. No parameter checking is performed 4973 on Index. If the Index value is beyond the implemented PMC register range, 4974 zero value will be returned. 4975 This function is only available on Itanium processors. 4976 4977 @param Index The 8-bit Performance Monitor Configuration Register index to read. 4978 4979 @return The current value of Performance Monitor Configuration Register 4980 specified by Index. 4981 4982 **/ 4983 UINT64 4984 EFIAPI 4985 AsmReadPmc ( 4986 IN UINT8 Index 4987 ); 4988 4989 4990 /** 4991 Reads the current value of Performance Monitor Data Register (PMD). 4992 4993 All processor implementations provide at least 4 performance counters 4994 (PMC/PMD [4]...PMC/PMD [7] pairs), and 4 performance monitor counter 4995 overflow status registers (PMC [0]... PMC [3]). Processor implementations may 4996 provide additional implementation-dependent PMC and PMD to increase the number 4997 of 'generic' performance counters (PMC/PMD pairs). The remainder of PMC and PMD 4998 register set is implementation dependent. No parameter checking is performed 4999 on Index. If the Index value is beyond the implemented PMD register range, 5000 zero value will be returned. 5001 This function is only available on Itanium processors. 5002 5003 @param Index The 8-bit Performance Monitor Data Register index to read. 5004 5005 @return The current value of Performance Monitor Data Register specified by Index. 5006 5007 **/ 5008 UINT64 5009 EFIAPI 5010 AsmReadPmd ( 5011 IN UINT8 Index 5012 ); 5013 5014 5015 /** 5016 Writes the current value of 64-bit Instruction Breakpoint Register (IBR). 5017 5018 Writes current value of Instruction Breakpoint Register specified by Index. 5019 The Instruction Breakpoint Registers are used in pairs. The even numbered 5020 registers contain breakpoint addresses, and odd numbered registers contain 5021 breakpoint mask conditions. At least four instruction registers pairs are implemented 5022 on all processor models. Implemented registers are contiguous starting with 5023 register 0. No parameter checking is performed on Index. If the Index value 5024 is beyond the implemented IBR register range, a Reserved Register/Field fault may 5025 occur. The caller must either guarantee that Index is valid, or the caller must 5026 set up fault handlers to catch the faults. 5027 This function is only available on Itanium processors. 5028 5029 @param Index The 8-bit Instruction Breakpoint Register index to write. 5030 @param Value The 64-bit value to write to IBR. 5031 5032 @return The 64-bit value written to the IBR. 5033 5034 **/ 5035 UINT64 5036 EFIAPI 5037 AsmWriteIbr ( 5038 IN UINT8 Index, 5039 IN UINT64 Value 5040 ); 5041 5042 5043 /** 5044 Writes the current value of 64-bit Data Breakpoint Register (DBR). 5045 5046 Writes current value of Data Breakpoint Register specified by Index. 5047 The Data Breakpoint Registers are used in pairs. The even numbered registers 5048 contain breakpoint addresses, and odd numbered registers contain breakpoint 5049 mask conditions. At least four data registers pairs are implemented on all processor 5050 models. Implemented registers are contiguous starting with register 0. No parameter 5051 checking is performed on Index. If the Index value is beyond the implemented 5052 DBR register range, a Reserved Register/Field fault may occur. The caller must 5053 either guarantee that Index is valid, or the caller must set up fault handlers to 5054 catch the faults. 5055 This function is only available on Itanium processors. 5056 5057 @param Index The 8-bit Data Breakpoint Register index to write. 5058 @param Value The 64-bit value to write to DBR. 5059 5060 @return The 64-bit value written to the DBR. 5061 5062 **/ 5063 UINT64 5064 EFIAPI 5065 AsmWriteDbr ( 5066 IN UINT8 Index, 5067 IN UINT64 Value 5068 ); 5069 5070 5071 /** 5072 Writes the current value of 64-bit Performance Monitor Configuration Register (PMC). 5073 5074 Writes current value of Performance Monitor Configuration Register specified by Index. 5075 All processor implementations provide at least four performance counters 5076 (PMC/PMD [4]...PMC/PMD [7] pairs), and four performance monitor counter overflow status 5077 registers (PMC [0]... PMC [3]). Processor implementations may provide additional 5078 implementation-dependent PMC and PMD to increase the number of 'generic' performance 5079 counters (PMC/PMD pairs). The remainder of PMC and PMD register set is implementation 5080 dependent. No parameter checking is performed on Index. If the Index value is 5081 beyond the implemented PMC register range, the write is ignored. 5082 This function is only available on Itanium processors. 5083 5084 @param Index The 8-bit Performance Monitor Configuration Register index to write. 5085 @param Value The 64-bit value to write to PMC. 5086 5087 @return The 64-bit value written to the PMC. 5088 5089 **/ 5090 UINT64 5091 EFIAPI 5092 AsmWritePmc ( 5093 IN UINT8 Index, 5094 IN UINT64 Value 5095 ); 5096 5097 5098 /** 5099 Writes the current value of 64-bit Performance Monitor Data Register (PMD). 5100 5101 Writes current value of Performance Monitor Data Register specified by Index. 5102 All processor implementations provide at least four performance counters 5103 (PMC/PMD [4]...PMC/PMD [7] pairs), and four performance monitor counter overflow 5104 status registers (PMC [0]... PMC [3]). Processor implementations may provide 5105 additional implementation-dependent PMC and PMD to increase the number of 'generic' 5106 performance counters (PMC/PMD pairs). The remainder of PMC and PMD register set 5107 is implementation dependent. No parameter checking is performed on Index. If the 5108 Index value is beyond the implemented PMD register range, the write is ignored. 5109 This function is only available on Itanium processors. 5110 5111 @param Index The 8-bit Performance Monitor Data Register index to write. 5112 @param Value The 64-bit value to write to PMD. 5113 5114 @return The 64-bit value written to the PMD. 5115 5116 **/ 5117 UINT64 5118 EFIAPI 5119 AsmWritePmd ( 5120 IN UINT8 Index, 5121 IN UINT64 Value 5122 ); 5123 5124 5125 /** 5126 Reads the current value of 64-bit Global Pointer (GP). 5127 5128 Reads and returns the current value of GP. 5129 This function is only available on Itanium processors. 5130 5131 @return The current value of GP. 5132 5133 **/ 5134 UINT64 5135 EFIAPI 5136 AsmReadGp ( 5137 VOID 5138 ); 5139 5140 5141 /** 5142 Write the current value of 64-bit Global Pointer (GP). 5143 5144 Writes the current value of GP. The 64-bit value written to the GP is returned. 5145 No parameter checking is performed on Value. 5146 This function is only available on Itanium processors. 5147 5148 @param Value The 64-bit value to write to GP. 5149 5150 @return The 64-bit value written to the GP. 5151 5152 **/ 5153 UINT64 5154 EFIAPI 5155 AsmWriteGp ( 5156 IN UINT64 Value 5157 ); 5158 5159 5160 /** 5161 Reads the current value of 64-bit Stack Pointer (SP). 5162 5163 Reads and returns the current value of SP. 5164 This function is only available on Itanium processors. 5165 5166 @return The current value of SP. 5167 5168 **/ 5169 UINT64 5170 EFIAPI 5171 AsmReadSp ( 5172 VOID 5173 ); 5174 5175 5176 /// 5177 /// Valid Index value for AsmReadControlRegister(). 5178 /// 5179 #define IPF_CONTROL_REGISTER_DCR 0 5180 #define IPF_CONTROL_REGISTER_ITM 1 5181 #define IPF_CONTROL_REGISTER_IVA 2 5182 #define IPF_CONTROL_REGISTER_PTA 8 5183 #define IPF_CONTROL_REGISTER_IPSR 16 5184 #define IPF_CONTROL_REGISTER_ISR 17 5185 #define IPF_CONTROL_REGISTER_IIP 19 5186 #define IPF_CONTROL_REGISTER_IFA 20 5187 #define IPF_CONTROL_REGISTER_ITIR 21 5188 #define IPF_CONTROL_REGISTER_IIPA 22 5189 #define IPF_CONTROL_REGISTER_IFS 23 5190 #define IPF_CONTROL_REGISTER_IIM 24 5191 #define IPF_CONTROL_REGISTER_IHA 25 5192 #define IPF_CONTROL_REGISTER_LID 64 5193 #define IPF_CONTROL_REGISTER_IVR 65 5194 #define IPF_CONTROL_REGISTER_TPR 66 5195 #define IPF_CONTROL_REGISTER_EOI 67 5196 #define IPF_CONTROL_REGISTER_IRR0 68 5197 #define IPF_CONTROL_REGISTER_IRR1 69 5198 #define IPF_CONTROL_REGISTER_IRR2 70 5199 #define IPF_CONTROL_REGISTER_IRR3 71 5200 #define IPF_CONTROL_REGISTER_ITV 72 5201 #define IPF_CONTROL_REGISTER_PMV 73 5202 #define IPF_CONTROL_REGISTER_CMCV 74 5203 #define IPF_CONTROL_REGISTER_LRR0 80 5204 #define IPF_CONTROL_REGISTER_LRR1 81 5205 5206 /** 5207 Reads a 64-bit control register. 5208 5209 Reads and returns the control register specified by Index. The valid Index valued 5210 are defined above in "Related Definitions". 5211 If Index is invalid then 0xFFFFFFFFFFFFFFFF is returned. This function is only 5212 available on Itanium processors. 5213 5214 @param Index The index of the control register to read. 5215 5216 @return The control register specified by Index. 5217 5218 **/ 5219 UINT64 5220 EFIAPI 5221 AsmReadControlRegister ( 5222 IN UINT64 Index 5223 ); 5224 5225 5226 /// 5227 /// Valid Index value for AsmReadApplicationRegister(). 5228 /// 5229 #define IPF_APPLICATION_REGISTER_K0 0 5230 #define IPF_APPLICATION_REGISTER_K1 1 5231 #define IPF_APPLICATION_REGISTER_K2 2 5232 #define IPF_APPLICATION_REGISTER_K3 3 5233 #define IPF_APPLICATION_REGISTER_K4 4 5234 #define IPF_APPLICATION_REGISTER_K5 5 5235 #define IPF_APPLICATION_REGISTER_K6 6 5236 #define IPF_APPLICATION_REGISTER_K7 7 5237 #define IPF_APPLICATION_REGISTER_RSC 16 5238 #define IPF_APPLICATION_REGISTER_BSP 17 5239 #define IPF_APPLICATION_REGISTER_BSPSTORE 18 5240 #define IPF_APPLICATION_REGISTER_RNAT 19 5241 #define IPF_APPLICATION_REGISTER_FCR 21 5242 #define IPF_APPLICATION_REGISTER_EFLAG 24 5243 #define IPF_APPLICATION_REGISTER_CSD 25 5244 #define IPF_APPLICATION_REGISTER_SSD 26 5245 #define IPF_APPLICATION_REGISTER_CFLG 27 5246 #define IPF_APPLICATION_REGISTER_FSR 28 5247 #define IPF_APPLICATION_REGISTER_FIR 29 5248 #define IPF_APPLICATION_REGISTER_FDR 30 5249 #define IPF_APPLICATION_REGISTER_CCV 32 5250 #define IPF_APPLICATION_REGISTER_UNAT 36 5251 #define IPF_APPLICATION_REGISTER_FPSR 40 5252 #define IPF_APPLICATION_REGISTER_ITC 44 5253 #define IPF_APPLICATION_REGISTER_PFS 64 5254 #define IPF_APPLICATION_REGISTER_LC 65 5255 #define IPF_APPLICATION_REGISTER_EC 66 5256 5257 /** 5258 Reads a 64-bit application register. 5259 5260 Reads and returns the application register specified by Index. The valid Index 5261 valued are defined above in "Related Definitions". 5262 If Index is invalid then 0xFFFFFFFFFFFFFFFF is returned. This function is only 5263 available on Itanium processors. 5264 5265 @param Index The index of the application register to read. 5266 5267 @return The application register specified by Index. 5268 5269 **/ 5270 UINT64 5271 EFIAPI 5272 AsmReadApplicationRegister ( 5273 IN UINT64 Index 5274 ); 5275 5276 5277 /** 5278 Reads the current value of a Machine Specific Register (MSR). 5279 5280 Reads and returns the current value of the Machine Specific Register specified by Index. No 5281 parameter checking is performed on Index, and if the Index value is beyond the implemented MSR 5282 register range, a Reserved Register/Field fault may occur. The caller must either guarantee that 5283 Index is valid, or the caller must set up fault handlers to catch the faults. This function is 5284 only available on Itanium processors. 5285 5286 @param Index The 8-bit Machine Specific Register index to read. 5287 5288 @return The current value of the Machine Specific Register specified by Index. 5289 5290 **/ 5291 UINT64 5292 EFIAPI 5293 AsmReadMsr ( 5294 IN UINT8 Index 5295 ); 5296 5297 5298 /** 5299 Writes the current value of a Machine Specific Register (MSR). 5300 5301 Writes Value to the Machine Specific Register specified by Index. Value is returned. No 5302 parameter checking is performed on Index, and if the Index value is beyond the implemented MSR 5303 register range, a Reserved Register/Field fault may occur. The caller must either guarantee that 5304 Index is valid, or the caller must set up fault handlers to catch the faults. This function is 5305 only available on Itanium processors. 5306 5307 @param Index The 8-bit Machine Specific Register index to write. 5308 @param Value The 64-bit value to write to the Machine Specific Register. 5309 5310 @return The 64-bit value to write to the Machine Specific Register. 5311 5312 **/ 5313 UINT64 5314 EFIAPI 5315 AsmWriteMsr ( 5316 IN UINT8 Index, 5317 IN UINT64 Value 5318 ); 5319 5320 5321 /** 5322 Determines if the CPU is currently executing in virtual, physical, or mixed mode. 5323 5324 Determines the current execution mode of the CPU. 5325 If the CPU is in virtual mode(PSR.RT=1, PSR.DT=1, PSR.IT=1), then 1 is returned. 5326 If the CPU is in physical mode(PSR.RT=0, PSR.DT=0, PSR.IT=0), then 0 is returned. 5327 If the CPU is not in physical mode or virtual mode, then it is in mixed mode, 5328 and -1 is returned. 5329 This function is only available on Itanium processors. 5330 5331 @retval 1 The CPU is in virtual mode. 5332 @retval 0 The CPU is in physical mode. 5333 @retval -1 The CPU is in mixed mode. 5334 5335 **/ 5336 INT64 5337 EFIAPI 5338 AsmCpuVirtual ( 5339 VOID 5340 ); 5341 5342 5343 /** 5344 Makes a PAL procedure call. 5345 5346 This is a wrapper function to make a PAL procedure call. Based on the Index 5347 value this API will make static or stacked PAL call. The following table 5348 describes the usage of PAL Procedure Index Assignment. Architected procedures 5349 may be designated as required or optional. If a PAL procedure is specified 5350 as optional, a unique return code of 0xFFFFFFFFFFFFFFFF is returned in the 5351 Status field of the PAL_CALL_RETURN structure. 5352 This indicates that the procedure is not present in this PAL implementation. 5353 It is the caller's responsibility to check for this return code after calling 5354 any optional PAL procedure. 5355 No parameter checking is performed on the 5 input parameters, but there are 5356 some common rules that the caller should follow when making a PAL call. Any 5357 address passed to PAL as buffers for return parameters must be 8-byte aligned. 5358 Unaligned addresses may cause undefined results. For those parameters defined 5359 as reserved or some fields defined as reserved must be zero filled or the invalid 5360 argument return value may be returned or undefined result may occur during the 5361 execution of the procedure. If the PalEntryPoint does not point to a valid 5362 PAL entry point then the system behavior is undefined. This function is only 5363 available on Itanium processors. 5364 5365 @param PalEntryPoint The PAL procedure calls entry point. 5366 @param Index The PAL procedure Index number. 5367 @param Arg2 The 2nd parameter for PAL procedure calls. 5368 @param Arg3 The 3rd parameter for PAL procedure calls. 5369 @param Arg4 The 4th parameter for PAL procedure calls. 5370 5371 @return structure returned from the PAL Call procedure, including the status and return value. 5372 5373 **/ 5374 PAL_CALL_RETURN 5375 EFIAPI 5376 AsmPalCall ( 5377 IN UINT64 PalEntryPoint, 5378 IN UINT64 Index, 5379 IN UINT64 Arg2, 5380 IN UINT64 Arg3, 5381 IN UINT64 Arg4 5382 ); 5383 #endif 5384 5385 #if defined (MDE_CPU_IA32) || defined (MDE_CPU_X64) 5386 /// 5387 /// IA32 and x64 Specific Functions. 5388 /// Byte packed structure for 16-bit Real Mode EFLAGS. 5389 /// 5390 typedef union { 5391 struct { 5392 UINT32 CF:1; ///< Carry Flag. 5393 UINT32 Reserved_0:1; ///< Reserved. 5394 UINT32 PF:1; ///< Parity Flag. 5395 UINT32 Reserved_1:1; ///< Reserved. 5396 UINT32 AF:1; ///< Auxiliary Carry Flag. 5397 UINT32 Reserved_2:1; ///< Reserved. 5398 UINT32 ZF:1; ///< Zero Flag. 5399 UINT32 SF:1; ///< Sign Flag. 5400 UINT32 TF:1; ///< Trap Flag. 5401 UINT32 IF:1; ///< Interrupt Enable Flag. 5402 UINT32 DF:1; ///< Direction Flag. 5403 UINT32 OF:1; ///< Overflow Flag. 5404 UINT32 IOPL:2; ///< I/O Privilege Level. 5405 UINT32 NT:1; ///< Nested Task. 5406 UINT32 Reserved_3:1; ///< Reserved. 5407 } Bits; 5408 UINT16 Uint16; 5409 } IA32_FLAGS16; 5410 5411 /// 5412 /// Byte packed structure for EFLAGS/RFLAGS. 5413 /// 32-bits on IA-32. 5414 /// 64-bits on x64. The upper 32-bits on x64 are reserved. 5415 /// 5416 typedef union { 5417 struct { 5418 UINT32 CF:1; ///< Carry Flag. 5419 UINT32 Reserved_0:1; ///< Reserved. 5420 UINT32 PF:1; ///< Parity Flag. 5421 UINT32 Reserved_1:1; ///< Reserved. 5422 UINT32 AF:1; ///< Auxiliary Carry Flag. 5423 UINT32 Reserved_2:1; ///< Reserved. 5424 UINT32 ZF:1; ///< Zero Flag. 5425 UINT32 SF:1; ///< Sign Flag. 5426 UINT32 TF:1; ///< Trap Flag. 5427 UINT32 IF:1; ///< Interrupt Enable Flag. 5428 UINT32 DF:1; ///< Direction Flag. 5429 UINT32 OF:1; ///< Overflow Flag. 5430 UINT32 IOPL:2; ///< I/O Privilege Level. 5431 UINT32 NT:1; ///< Nested Task. 5432 UINT32 Reserved_3:1; ///< Reserved. 5433 UINT32 RF:1; ///< Resume Flag. 5434 UINT32 VM:1; ///< Virtual 8086 Mode. 5435 UINT32 AC:1; ///< Alignment Check. 5436 UINT32 VIF:1; ///< Virtual Interrupt Flag. 5437 UINT32 VIP:1; ///< Virtual Interrupt Pending. 5438 UINT32 ID:1; ///< ID Flag. 5439 UINT32 Reserved_4:10; ///< Reserved. 5440 } Bits; 5441 UINTN UintN; 5442 } IA32_EFLAGS32; 5443 5444 /// 5445 /// Byte packed structure for Control Register 0 (CR0). 5446 /// 32-bits on IA-32. 5447 /// 64-bits on x64. The upper 32-bits on x64 are reserved. 5448 /// 5449 typedef union { 5450 struct { 5451 UINT32 PE:1; ///< Protection Enable. 5452 UINT32 MP:1; ///< Monitor Coprocessor. 5453 UINT32 EM:1; ///< Emulation. 5454 UINT32 TS:1; ///< Task Switched. 5455 UINT32 ET:1; ///< Extension Type. 5456 UINT32 NE:1; ///< Numeric Error. 5457 UINT32 Reserved_0:10; ///< Reserved. 5458 UINT32 WP:1; ///< Write Protect. 5459 UINT32 Reserved_1:1; ///< Reserved. 5460 UINT32 AM:1; ///< Alignment Mask. 5461 UINT32 Reserved_2:10; ///< Reserved. 5462 UINT32 NW:1; ///< Mot Write-through. 5463 UINT32 CD:1; ///< Cache Disable. 5464 UINT32 PG:1; ///< Paging. 5465 } Bits; 5466 UINTN UintN; 5467 } IA32_CR0; 5468 5469 /// 5470 /// Byte packed structure for Control Register 4 (CR4). 5471 /// 32-bits on IA-32. 5472 /// 64-bits on x64. The upper 32-bits on x64 are reserved. 5473 /// 5474 typedef union { 5475 struct { 5476 UINT32 VME:1; ///< Virtual-8086 Mode Extensions. 5477 UINT32 PVI:1; ///< Protected-Mode Virtual Interrupts. 5478 UINT32 TSD:1; ///< Time Stamp Disable. 5479 UINT32 DE:1; ///< Debugging Extensions. 5480 UINT32 PSE:1; ///< Page Size Extensions. 5481 UINT32 PAE:1; ///< Physical Address Extension. 5482 UINT32 MCE:1; ///< Machine Check Enable. 5483 UINT32 PGE:1; ///< Page Global Enable. 5484 UINT32 PCE:1; ///< Performance Monitoring Counter 5485 ///< Enable. 5486 UINT32 OSFXSR:1; ///< Operating System Support for 5487 ///< FXSAVE and FXRSTOR instructions 5488 UINT32 OSXMMEXCPT:1; ///< Operating System Support for 5489 ///< Unmasked SIMD Floating Point 5490 ///< Exceptions. 5491 UINT32 Reserved_0:2; ///< Reserved. 5492 UINT32 VMXE:1; ///< VMX Enable 5493 UINT32 Reserved_1:18; ///< Reserved. 5494 } Bits; 5495 UINTN UintN; 5496 } IA32_CR4; 5497 5498 /// 5499 /// Byte packed structure for a segment descriptor in a GDT/LDT. 5500 /// 5501 typedef union { 5502 struct { 5503 UINT32 LimitLow:16; 5504 UINT32 BaseLow:16; 5505 UINT32 BaseMid:8; 5506 UINT32 Type:4; 5507 UINT32 S:1; 5508 UINT32 DPL:2; 5509 UINT32 P:1; 5510 UINT32 LimitHigh:4; 5511 UINT32 AVL:1; 5512 UINT32 L:1; 5513 UINT32 DB:1; 5514 UINT32 G:1; 5515 UINT32 BaseHigh:8; 5516 } Bits; 5517 UINT64 Uint64; 5518 } IA32_SEGMENT_DESCRIPTOR; 5519 5520 /// 5521 /// Byte packed structure for an IDTR, GDTR, LDTR descriptor. 5522 /// 5523 #pragma pack (1) 5524 typedef struct { 5525 UINT16 Limit; 5526 UINTN Base; 5527 } IA32_DESCRIPTOR; 5528 #pragma pack () 5529 5530 #define IA32_IDT_GATE_TYPE_TASK 0x85 5531 #define IA32_IDT_GATE_TYPE_INTERRUPT_16 0x86 5532 #define IA32_IDT_GATE_TYPE_TRAP_16 0x87 5533 #define IA32_IDT_GATE_TYPE_INTERRUPT_32 0x8E 5534 #define IA32_IDT_GATE_TYPE_TRAP_32 0x8F 5535 5536 5537 #if defined (MDE_CPU_IA32) 5538 /// 5539 /// Byte packed structure for an IA-32 Interrupt Gate Descriptor. 5540 /// 5541 typedef union { 5542 struct { 5543 UINT32 OffsetLow:16; ///< Offset bits 15..0. 5544 UINT32 Selector:16; ///< Selector. 5545 UINT32 Reserved_0:8; ///< Reserved. 5546 UINT32 GateType:8; ///< Gate Type. See #defines above. 5547 UINT32 OffsetHigh:16; ///< Offset bits 31..16. 5548 } Bits; 5549 UINT64 Uint64; 5550 } IA32_IDT_GATE_DESCRIPTOR; 5551 5552 #endif 5553 5554 #if defined (MDE_CPU_X64) 5555 /// 5556 /// Byte packed structure for an x64 Interrupt Gate Descriptor. 5557 /// 5558 typedef union { 5559 struct { 5560 UINT32 OffsetLow:16; ///< Offset bits 15..0. 5561 UINT32 Selector:16; ///< Selector. 5562 UINT32 Reserved_0:8; ///< Reserved. 5563 UINT32 GateType:8; ///< Gate Type. See #defines above. 5564 UINT32 OffsetHigh:16; ///< Offset bits 31..16. 5565 UINT32 OffsetUpper:32; ///< Offset bits 63..32. 5566 UINT32 Reserved_1:32; ///< Reserved. 5567 } Bits; 5568 struct { 5569 UINT64 Uint64; 5570 UINT64 Uint64_1; 5571 } Uint128; 5572 } IA32_IDT_GATE_DESCRIPTOR; 5573 5574 #endif 5575 5576 /// 5577 /// Byte packed structure for an FP/SSE/SSE2 context. 5578 /// 5579 typedef struct { 5580 UINT8 Buffer[512]; 5581 } IA32_FX_BUFFER; 5582 5583 /// 5584 /// Structures for the 16-bit real mode thunks. 5585 /// 5586 typedef struct { 5587 UINT32 Reserved1; 5588 UINT32 Reserved2; 5589 UINT32 Reserved3; 5590 UINT32 Reserved4; 5591 UINT8 BL; 5592 UINT8 BH; 5593 UINT16 Reserved5; 5594 UINT8 DL; 5595 UINT8 DH; 5596 UINT16 Reserved6; 5597 UINT8 CL; 5598 UINT8 CH; 5599 UINT16 Reserved7; 5600 UINT8 AL; 5601 UINT8 AH; 5602 UINT16 Reserved8; 5603 } IA32_BYTE_REGS; 5604 5605 typedef struct { 5606 UINT16 DI; 5607 UINT16 Reserved1; 5608 UINT16 SI; 5609 UINT16 Reserved2; 5610 UINT16 BP; 5611 UINT16 Reserved3; 5612 UINT16 SP; 5613 UINT16 Reserved4; 5614 UINT16 BX; 5615 UINT16 Reserved5; 5616 UINT16 DX; 5617 UINT16 Reserved6; 5618 UINT16 CX; 5619 UINT16 Reserved7; 5620 UINT16 AX; 5621 UINT16 Reserved8; 5622 } IA32_WORD_REGS; 5623 5624 typedef struct { 5625 UINT32 EDI; 5626 UINT32 ESI; 5627 UINT32 EBP; 5628 UINT32 ESP; 5629 UINT32 EBX; 5630 UINT32 EDX; 5631 UINT32 ECX; 5632 UINT32 EAX; 5633 UINT16 DS; 5634 UINT16 ES; 5635 UINT16 FS; 5636 UINT16 GS; 5637 IA32_EFLAGS32 EFLAGS; 5638 UINT32 Eip; 5639 UINT16 CS; 5640 UINT16 SS; 5641 } IA32_DWORD_REGS; 5642 5643 typedef union { 5644 IA32_DWORD_REGS E; 5645 IA32_WORD_REGS X; 5646 IA32_BYTE_REGS H; 5647 } IA32_REGISTER_SET; 5648 5649 /// 5650 /// Byte packed structure for an 16-bit real mode thunks. 5651 /// 5652 typedef struct { 5653 IA32_REGISTER_SET *RealModeState; 5654 VOID *RealModeBuffer; 5655 UINT32 RealModeBufferSize; 5656 UINT32 ThunkAttributes; 5657 } THUNK_CONTEXT; 5658 5659 #define THUNK_ATTRIBUTE_BIG_REAL_MODE 0x00000001 5660 #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 0x00000002 5661 #define THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL 0x00000004 5662 5663 /** 5664 Retrieves CPUID information. 5665 5666 Executes the CPUID instruction with EAX set to the value specified by Index. 5667 This function always returns Index. 5668 If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. 5669 If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. 5670 If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. 5671 If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. 5672 This function is only available on IA-32 and x64. 5673 5674 @param Index The 32-bit value to load into EAX prior to invoking the CPUID 5675 instruction. 5676 @param Eax The pointer to the 32-bit EAX value returned by the CPUID 5677 instruction. This is an optional parameter that may be NULL. 5678 @param Ebx The pointer to the 32-bit EBX value returned by the CPUID 5679 instruction. This is an optional parameter that may be NULL. 5680 @param Ecx The pointer to the 32-bit ECX value returned by the CPUID 5681 instruction. This is an optional parameter that may be NULL. 5682 @param Edx The pointer to the 32-bit EDX value returned by the CPUID 5683 instruction. This is an optional parameter that may be NULL. 5684 5685 @return Index. 5686 5687 **/ 5688 UINT32 5689 EFIAPI 5690 AsmCpuid ( 5691 IN UINT32 Index, 5692 OUT UINT32 *Eax, OPTIONAL 5693 OUT UINT32 *Ebx, OPTIONAL 5694 OUT UINT32 *Ecx, OPTIONAL 5695 OUT UINT32 *Edx OPTIONAL 5696 ); 5697 5698 5699 /** 5700 Retrieves CPUID information using an extended leaf identifier. 5701 5702 Executes the CPUID instruction with EAX set to the value specified by Index 5703 and ECX set to the value specified by SubIndex. This function always returns 5704 Index. This function is only available on IA-32 and x64. 5705 5706 If Eax is not NULL, then the value of EAX after CPUID is returned in Eax. 5707 If Ebx is not NULL, then the value of EBX after CPUID is returned in Ebx. 5708 If Ecx is not NULL, then the value of ECX after CPUID is returned in Ecx. 5709 If Edx is not NULL, then the value of EDX after CPUID is returned in Edx. 5710 5711 @param Index The 32-bit value to load into EAX prior to invoking the 5712 CPUID instruction. 5713 @param SubIndex The 32-bit value to load into ECX prior to invoking the 5714 CPUID instruction. 5715 @param Eax The pointer to the 32-bit EAX value returned by the CPUID 5716 instruction. This is an optional parameter that may be 5717 NULL. 5718 @param Ebx The pointer to the 32-bit EBX value returned by the CPUID 5719 instruction. This is an optional parameter that may be 5720 NULL. 5721 @param Ecx The pointer to the 32-bit ECX value returned by the CPUID 5722 instruction. This is an optional parameter that may be 5723 NULL. 5724 @param Edx The pointer to the 32-bit EDX value returned by the CPUID 5725 instruction. This is an optional parameter that may be 5726 NULL. 5727 5728 @return Index. 5729 5730 **/ 5731 UINT32 5732 EFIAPI 5733 AsmCpuidEx ( 5734 IN UINT32 Index, 5735 IN UINT32 SubIndex, 5736 OUT UINT32 *Eax, OPTIONAL 5737 OUT UINT32 *Ebx, OPTIONAL 5738 OUT UINT32 *Ecx, OPTIONAL 5739 OUT UINT32 *Edx OPTIONAL 5740 ); 5741 5742 5743 /** 5744 Set CD bit and clear NW bit of CR0 followed by a WBINVD. 5745 5746 Disables the caches by setting the CD bit of CR0 to 1, clearing the NW bit of CR0 to 0, 5747 and executing a WBINVD instruction. This function is only available on IA-32 and x64. 5748 5749 **/ 5750 VOID 5751 EFIAPI 5752 AsmDisableCache ( 5753 VOID 5754 ); 5755 5756 5757 /** 5758 Perform a WBINVD and clear both the CD and NW bits of CR0. 5759 5760 Enables the caches by executing a WBINVD instruction and then clear both the CD and NW 5761 bits of CR0 to 0. This function is only available on IA-32 and x64. 5762 5763 **/ 5764 VOID 5765 EFIAPI 5766 AsmEnableCache ( 5767 VOID 5768 ); 5769 5770 5771 /** 5772 Returns the lower 32-bits of a Machine Specific Register(MSR). 5773 5774 Reads and returns the lower 32-bits of the MSR specified by Index. 5775 No parameter checking is performed on Index, and some Index values may cause 5776 CPU exceptions. The caller must either guarantee that Index is valid, or the 5777 caller must set up exception handlers to catch the exceptions. This function 5778 is only available on IA-32 and x64. 5779 5780 @param Index The 32-bit MSR index to read. 5781 5782 @return The lower 32 bits of the MSR identified by Index. 5783 5784 **/ 5785 UINT32 5786 EFIAPI 5787 AsmReadMsr32 ( 5788 IN UINT32 Index 5789 ); 5790 5791 5792 /** 5793 Writes a 32-bit value to a Machine Specific Register(MSR), and returns the value. 5794 The upper 32-bits of the MSR are set to zero. 5795 5796 Writes the 32-bit value specified by Value to the MSR specified by Index. The 5797 upper 32-bits of the MSR write are set to zero. The 32-bit value written to 5798 the MSR is returned. No parameter checking is performed on Index or Value, 5799 and some of these may cause CPU exceptions. The caller must either guarantee 5800 that Index and Value are valid, or the caller must establish proper exception 5801 handlers. This function is only available on IA-32 and x64. 5802 5803 @param Index The 32-bit MSR index to write. 5804 @param Value The 32-bit value to write to the MSR. 5805 5806 @return Value 5807 5808 **/ 5809 UINT32 5810 EFIAPI 5811 AsmWriteMsr32 ( 5812 IN UINT32 Index, 5813 IN UINT32 Value 5814 ); 5815 5816 5817 /** 5818 Reads a 64-bit MSR, performs a bitwise OR on the lower 32-bits, and 5819 writes the result back to the 64-bit MSR. 5820 5821 Reads the 64-bit MSR specified by Index, performs a bitwise OR 5822 between the lower 32-bits of the read result and the value specified by 5823 OrData, and writes the result to the 64-bit MSR specified by Index. The lower 5824 32-bits of the value written to the MSR is returned. No parameter checking is 5825 performed on Index or OrData, and some of these may cause CPU exceptions. The 5826 caller must either guarantee that Index and OrData are valid, or the caller 5827 must establish proper exception handlers. This function is only available on 5828 IA-32 and x64. 5829 5830 @param Index The 32-bit MSR index to write. 5831 @param OrData The value to OR with the read value from the MSR. 5832 5833 @return The lower 32-bit value written to the MSR. 5834 5835 **/ 5836 UINT32 5837 EFIAPI 5838 AsmMsrOr32 ( 5839 IN UINT32 Index, 5840 IN UINT32 OrData 5841 ); 5842 5843 5844 /** 5845 Reads a 64-bit MSR, performs a bitwise AND on the lower 32-bits, and writes 5846 the result back to the 64-bit MSR. 5847 5848 Reads the 64-bit MSR specified by Index, performs a bitwise AND between the 5849 lower 32-bits of the read result and the value specified by AndData, and 5850 writes the result to the 64-bit MSR specified by Index. The lower 32-bits of 5851 the value written to the MSR is returned. No parameter checking is performed 5852 on Index or AndData, and some of these may cause CPU exceptions. The caller 5853 must either guarantee that Index and AndData are valid, or the caller must 5854 establish proper exception handlers. This function is only available on IA-32 5855 and x64. 5856 5857 @param Index The 32-bit MSR index to write. 5858 @param AndData The value to AND with the read value from the MSR. 5859 5860 @return The lower 32-bit value written to the MSR. 5861 5862 **/ 5863 UINT32 5864 EFIAPI 5865 AsmMsrAnd32 ( 5866 IN UINT32 Index, 5867 IN UINT32 AndData 5868 ); 5869 5870 5871 /** 5872 Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise OR 5873 on the lower 32-bits, and writes the result back to the 64-bit MSR. 5874 5875 Reads the 64-bit MSR specified by Index, performs a bitwise AND between the 5876 lower 32-bits of the read result and the value specified by AndData 5877 preserving the upper 32-bits, performs a bitwise OR between the 5878 result of the AND operation and the value specified by OrData, and writes the 5879 result to the 64-bit MSR specified by Address. The lower 32-bits of the value 5880 written to the MSR is returned. No parameter checking is performed on Index, 5881 AndData, or OrData, and some of these may cause CPU exceptions. The caller 5882 must either guarantee that Index, AndData, and OrData are valid, or the 5883 caller must establish proper exception handlers. This function is only 5884 available on IA-32 and x64. 5885 5886 @param Index The 32-bit MSR index to write. 5887 @param AndData The value to AND with the read value from the MSR. 5888 @param OrData The value to OR with the result of the AND operation. 5889 5890 @return The lower 32-bit value written to the MSR. 5891 5892 **/ 5893 UINT32 5894 EFIAPI 5895 AsmMsrAndThenOr32 ( 5896 IN UINT32 Index, 5897 IN UINT32 AndData, 5898 IN UINT32 OrData 5899 ); 5900 5901 5902 /** 5903 Reads a bit field of an MSR. 5904 5905 Reads the bit field in the lower 32-bits of a 64-bit MSR. The bit field is 5906 specified by the StartBit and the EndBit. The value of the bit field is 5907 returned. The caller must either guarantee that Index is valid, or the caller 5908 must set up exception handlers to catch the exceptions. This function is only 5909 available on IA-32 and x64. 5910 5911 If StartBit is greater than 31, then ASSERT(). 5912 If EndBit is greater than 31, then ASSERT(). 5913 If EndBit is less than StartBit, then ASSERT(). 5914 5915 @param Index The 32-bit MSR index to read. 5916 @param StartBit The ordinal of the least significant bit in the bit field. 5917 Range 0..31. 5918 @param EndBit The ordinal of the most significant bit in the bit field. 5919 Range 0..31. 5920 5921 @return The bit field read from the MSR. 5922 5923 **/ 5924 UINT32 5925 EFIAPI 5926 AsmMsrBitFieldRead32 ( 5927 IN UINT32 Index, 5928 IN UINTN StartBit, 5929 IN UINTN EndBit 5930 ); 5931 5932 5933 /** 5934 Writes a bit field to an MSR. 5935 5936 Writes Value to a bit field in the lower 32-bits of a 64-bit MSR. The bit 5937 field is specified by the StartBit and the EndBit. All other bits in the 5938 destination MSR are preserved. The lower 32-bits of the MSR written is 5939 returned. The caller must either guarantee that Index and the data written 5940 is valid, or the caller must set up exception handlers to catch the exceptions. 5941 This function is only available on IA-32 and x64. 5942 5943 If StartBit is greater than 31, then ASSERT(). 5944 If EndBit is greater than 31, then ASSERT(). 5945 If EndBit is less than StartBit, then ASSERT(). 5946 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 5947 5948 @param Index The 32-bit MSR index to write. 5949 @param StartBit The ordinal of the least significant bit in the bit field. 5950 Range 0..31. 5951 @param EndBit The ordinal of the most significant bit in the bit field. 5952 Range 0..31. 5953 @param Value New value of the bit field. 5954 5955 @return The lower 32-bit of the value written to the MSR. 5956 5957 **/ 5958 UINT32 5959 EFIAPI 5960 AsmMsrBitFieldWrite32 ( 5961 IN UINT32 Index, 5962 IN UINTN StartBit, 5963 IN UINTN EndBit, 5964 IN UINT32 Value 5965 ); 5966 5967 5968 /** 5969 Reads a bit field in a 64-bit MSR, performs a bitwise OR, and writes the 5970 result back to the bit field in the 64-bit MSR. 5971 5972 Reads the 64-bit MSR specified by Index, performs a bitwise OR 5973 between the read result and the value specified by OrData, and writes the 5974 result to the 64-bit MSR specified by Index. The lower 32-bits of the value 5975 written to the MSR are returned. Extra left bits in OrData are stripped. The 5976 caller must either guarantee that Index and the data written is valid, or 5977 the caller must set up exception handlers to catch the exceptions. This 5978 function is only available on IA-32 and x64. 5979 5980 If StartBit is greater than 31, then ASSERT(). 5981 If EndBit is greater than 31, then ASSERT(). 5982 If EndBit is less than StartBit, then ASSERT(). 5983 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 5984 5985 @param Index The 32-bit MSR index to write. 5986 @param StartBit The ordinal of the least significant bit in the bit field. 5987 Range 0..31. 5988 @param EndBit The ordinal of the most significant bit in the bit field. 5989 Range 0..31. 5990 @param OrData The value to OR with the read value from the MSR. 5991 5992 @return The lower 32-bit of the value written to the MSR. 5993 5994 **/ 5995 UINT32 5996 EFIAPI 5997 AsmMsrBitFieldOr32 ( 5998 IN UINT32 Index, 5999 IN UINTN StartBit, 6000 IN UINTN EndBit, 6001 IN UINT32 OrData 6002 ); 6003 6004 6005 /** 6006 Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the 6007 result back to the bit field in the 64-bit MSR. 6008 6009 Reads the 64-bit MSR specified by Index, performs a bitwise AND between the 6010 read result and the value specified by AndData, and writes the result to the 6011 64-bit MSR specified by Index. The lower 32-bits of the value written to the 6012 MSR are returned. Extra left bits in AndData are stripped. The caller must 6013 either guarantee that Index and the data written is valid, or the caller must 6014 set up exception handlers to catch the exceptions. This function is only 6015 available on IA-32 and x64. 6016 6017 If StartBit is greater than 31, then ASSERT(). 6018 If EndBit is greater than 31, then ASSERT(). 6019 If EndBit is less than StartBit, then ASSERT(). 6020 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6021 6022 @param Index The 32-bit MSR index to write. 6023 @param StartBit The ordinal of the least significant bit in the bit field. 6024 Range 0..31. 6025 @param EndBit The ordinal of the most significant bit in the bit field. 6026 Range 0..31. 6027 @param AndData The value to AND with the read value from the MSR. 6028 6029 @return The lower 32-bit of the value written to the MSR. 6030 6031 **/ 6032 UINT32 6033 EFIAPI 6034 AsmMsrBitFieldAnd32 ( 6035 IN UINT32 Index, 6036 IN UINTN StartBit, 6037 IN UINTN EndBit, 6038 IN UINT32 AndData 6039 ); 6040 6041 6042 /** 6043 Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a 6044 bitwise OR, and writes the result back to the bit field in the 6045 64-bit MSR. 6046 6047 Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by a 6048 bitwise OR between the read result and the value specified by 6049 AndData, and writes the result to the 64-bit MSR specified by Index. The 6050 lower 32-bits of the value written to the MSR are returned. Extra left bits 6051 in both AndData and OrData are stripped. The caller must either guarantee 6052 that Index and the data written is valid, or the caller must set up exception 6053 handlers to catch the exceptions. This function is only available on IA-32 6054 and x64. 6055 6056 If StartBit is greater than 31, then ASSERT(). 6057 If EndBit is greater than 31, then ASSERT(). 6058 If EndBit is less than StartBit, then ASSERT(). 6059 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6060 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6061 6062 @param Index The 32-bit MSR index to write. 6063 @param StartBit The ordinal of the least significant bit in the bit field. 6064 Range 0..31. 6065 @param EndBit The ordinal of the most significant bit in the bit field. 6066 Range 0..31. 6067 @param AndData The value to AND with the read value from the MSR. 6068 @param OrData The value to OR with the result of the AND operation. 6069 6070 @return The lower 32-bit of the value written to the MSR. 6071 6072 **/ 6073 UINT32 6074 EFIAPI 6075 AsmMsrBitFieldAndThenOr32 ( 6076 IN UINT32 Index, 6077 IN UINTN StartBit, 6078 IN UINTN EndBit, 6079 IN UINT32 AndData, 6080 IN UINT32 OrData 6081 ); 6082 6083 6084 /** 6085 Returns a 64-bit Machine Specific Register(MSR). 6086 6087 Reads and returns the 64-bit MSR specified by Index. No parameter checking is 6088 performed on Index, and some Index values may cause CPU exceptions. The 6089 caller must either guarantee that Index is valid, or the caller must set up 6090 exception handlers to catch the exceptions. This function is only available 6091 on IA-32 and x64. 6092 6093 @param Index The 32-bit MSR index to read. 6094 6095 @return The value of the MSR identified by Index. 6096 6097 **/ 6098 UINT64 6099 EFIAPI 6100 AsmReadMsr64 ( 6101 IN UINT32 Index 6102 ); 6103 6104 6105 /** 6106 Writes a 64-bit value to a Machine Specific Register(MSR), and returns the 6107 value. 6108 6109 Writes the 64-bit value specified by Value to the MSR specified by Index. The 6110 64-bit value written to the MSR is returned. No parameter checking is 6111 performed on Index or Value, and some of these may cause CPU exceptions. The 6112 caller must either guarantee that Index and Value are valid, or the caller 6113 must establish proper exception handlers. This function is only available on 6114 IA-32 and x64. 6115 6116 @param Index The 32-bit MSR index to write. 6117 @param Value The 64-bit value to write to the MSR. 6118 6119 @return Value 6120 6121 **/ 6122 UINT64 6123 EFIAPI 6124 AsmWriteMsr64 ( 6125 IN UINT32 Index, 6126 IN UINT64 Value 6127 ); 6128 6129 6130 /** 6131 Reads a 64-bit MSR, performs a bitwise OR, and writes the result 6132 back to the 64-bit MSR. 6133 6134 Reads the 64-bit MSR specified by Index, performs a bitwise OR 6135 between the read result and the value specified by OrData, and writes the 6136 result to the 64-bit MSR specified by Index. The value written to the MSR is 6137 returned. No parameter checking is performed on Index or OrData, and some of 6138 these may cause CPU exceptions. The caller must either guarantee that Index 6139 and OrData are valid, or the caller must establish proper exception handlers. 6140 This function is only available on IA-32 and x64. 6141 6142 @param Index The 32-bit MSR index to write. 6143 @param OrData The value to OR with the read value from the MSR. 6144 6145 @return The value written back to the MSR. 6146 6147 **/ 6148 UINT64 6149 EFIAPI 6150 AsmMsrOr64 ( 6151 IN UINT32 Index, 6152 IN UINT64 OrData 6153 ); 6154 6155 6156 /** 6157 Reads a 64-bit MSR, performs a bitwise AND, and writes the result back to the 6158 64-bit MSR. 6159 6160 Reads the 64-bit MSR specified by Index, performs a bitwise AND between the 6161 read result and the value specified by OrData, and writes the result to the 6162 64-bit MSR specified by Index. The value written to the MSR is returned. No 6163 parameter checking is performed on Index or OrData, and some of these may 6164 cause CPU exceptions. The caller must either guarantee that Index and OrData 6165 are valid, or the caller must establish proper exception handlers. This 6166 function is only available on IA-32 and x64. 6167 6168 @param Index The 32-bit MSR index to write. 6169 @param AndData The value to AND with the read value from the MSR. 6170 6171 @return The value written back to the MSR. 6172 6173 **/ 6174 UINT64 6175 EFIAPI 6176 AsmMsrAnd64 ( 6177 IN UINT32 Index, 6178 IN UINT64 AndData 6179 ); 6180 6181 6182 /** 6183 Reads a 64-bit MSR, performs a bitwise AND followed by a bitwise 6184 OR, and writes the result back to the 64-bit MSR. 6185 6186 Reads the 64-bit MSR specified by Index, performs a bitwise AND between read 6187 result and the value specified by AndData, performs a bitwise OR 6188 between the result of the AND operation and the value specified by OrData, 6189 and writes the result to the 64-bit MSR specified by Index. The value written 6190 to the MSR is returned. No parameter checking is performed on Index, AndData, 6191 or OrData, and some of these may cause CPU exceptions. The caller must either 6192 guarantee that Index, AndData, and OrData are valid, or the caller must 6193 establish proper exception handlers. This function is only available on IA-32 6194 and x64. 6195 6196 @param Index The 32-bit MSR index to write. 6197 @param AndData The value to AND with the read value from the MSR. 6198 @param OrData The value to OR with the result of the AND operation. 6199 6200 @return The value written back to the MSR. 6201 6202 **/ 6203 UINT64 6204 EFIAPI 6205 AsmMsrAndThenOr64 ( 6206 IN UINT32 Index, 6207 IN UINT64 AndData, 6208 IN UINT64 OrData 6209 ); 6210 6211 6212 /** 6213 Reads a bit field of an MSR. 6214 6215 Reads the bit field in the 64-bit MSR. The bit field is specified by the 6216 StartBit and the EndBit. The value of the bit field is returned. The caller 6217 must either guarantee that Index is valid, or the caller must set up 6218 exception handlers to catch the exceptions. This function is only available 6219 on IA-32 and x64. 6220 6221 If StartBit is greater than 63, then ASSERT(). 6222 If EndBit is greater than 63, then ASSERT(). 6223 If EndBit is less than StartBit, then ASSERT(). 6224 6225 @param Index The 32-bit MSR index to read. 6226 @param StartBit The ordinal of the least significant bit in the bit field. 6227 Range 0..63. 6228 @param EndBit The ordinal of the most significant bit in the bit field. 6229 Range 0..63. 6230 6231 @return The value read from the MSR. 6232 6233 **/ 6234 UINT64 6235 EFIAPI 6236 AsmMsrBitFieldRead64 ( 6237 IN UINT32 Index, 6238 IN UINTN StartBit, 6239 IN UINTN EndBit 6240 ); 6241 6242 6243 /** 6244 Writes a bit field to an MSR. 6245 6246 Writes Value to a bit field in a 64-bit MSR. The bit field is specified by 6247 the StartBit and the EndBit. All other bits in the destination MSR are 6248 preserved. The MSR written is returned. The caller must either guarantee 6249 that Index and the data written is valid, or the caller must set up exception 6250 handlers to catch the exceptions. This function is only available on IA-32 and x64. 6251 6252 If StartBit is greater than 63, then ASSERT(). 6253 If EndBit is greater than 63, then ASSERT(). 6254 If EndBit is less than StartBit, then ASSERT(). 6255 If Value is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6256 6257 @param Index The 32-bit MSR index to write. 6258 @param StartBit The ordinal of the least significant bit in the bit field. 6259 Range 0..63. 6260 @param EndBit The ordinal of the most significant bit in the bit field. 6261 Range 0..63. 6262 @param Value New value of the bit field. 6263 6264 @return The value written back to the MSR. 6265 6266 **/ 6267 UINT64 6268 EFIAPI 6269 AsmMsrBitFieldWrite64 ( 6270 IN UINT32 Index, 6271 IN UINTN StartBit, 6272 IN UINTN EndBit, 6273 IN UINT64 Value 6274 ); 6275 6276 6277 /** 6278 Reads a bit field in a 64-bit MSR, performs a bitwise OR, and 6279 writes the result back to the bit field in the 64-bit MSR. 6280 6281 Reads the 64-bit MSR specified by Index, performs a bitwise OR 6282 between the read result and the value specified by OrData, and writes the 6283 result to the 64-bit MSR specified by Index. The value written to the MSR is 6284 returned. Extra left bits in OrData are stripped. The caller must either 6285 guarantee that Index and the data written is valid, or the caller must set up 6286 exception handlers to catch the exceptions. This function is only available 6287 on IA-32 and x64. 6288 6289 If StartBit is greater than 63, then ASSERT(). 6290 If EndBit is greater than 63, then ASSERT(). 6291 If EndBit is less than StartBit, then ASSERT(). 6292 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6293 6294 @param Index The 32-bit MSR index to write. 6295 @param StartBit The ordinal of the least significant bit in the bit field. 6296 Range 0..63. 6297 @param EndBit The ordinal of the most significant bit in the bit field. 6298 Range 0..63. 6299 @param OrData The value to OR with the read value from the bit field. 6300 6301 @return The value written back to the MSR. 6302 6303 **/ 6304 UINT64 6305 EFIAPI 6306 AsmMsrBitFieldOr64 ( 6307 IN UINT32 Index, 6308 IN UINTN StartBit, 6309 IN UINTN EndBit, 6310 IN UINT64 OrData 6311 ); 6312 6313 6314 /** 6315 Reads a bit field in a 64-bit MSR, performs a bitwise AND, and writes the 6316 result back to the bit field in the 64-bit MSR. 6317 6318 Reads the 64-bit MSR specified by Index, performs a bitwise AND between the 6319 read result and the value specified by AndData, and writes the result to the 6320 64-bit MSR specified by Index. The value written to the MSR is returned. 6321 Extra left bits in AndData are stripped. The caller must either guarantee 6322 that Index and the data written is valid, or the caller must set up exception 6323 handlers to catch the exceptions. This function is only available on IA-32 6324 and x64. 6325 6326 If StartBit is greater than 63, then ASSERT(). 6327 If EndBit is greater than 63, then ASSERT(). 6328 If EndBit is less than StartBit, then ASSERT(). 6329 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6330 6331 @param Index The 32-bit MSR index to write. 6332 @param StartBit The ordinal of the least significant bit in the bit field. 6333 Range 0..63. 6334 @param EndBit The ordinal of the most significant bit in the bit field. 6335 Range 0..63. 6336 @param AndData The value to AND with the read value from the bit field. 6337 6338 @return The value written back to the MSR. 6339 6340 **/ 6341 UINT64 6342 EFIAPI 6343 AsmMsrBitFieldAnd64 ( 6344 IN UINT32 Index, 6345 IN UINTN StartBit, 6346 IN UINTN EndBit, 6347 IN UINT64 AndData 6348 ); 6349 6350 6351 /** 6352 Reads a bit field in a 64-bit MSR, performs a bitwise AND followed by a 6353 bitwise OR, and writes the result back to the bit field in the 6354 64-bit MSR. 6355 6356 Reads the 64-bit MSR specified by Index, performs a bitwise AND followed by 6357 a bitwise OR between the read result and the value specified by 6358 AndData, and writes the result to the 64-bit MSR specified by Index. The 6359 value written to the MSR is returned. Extra left bits in both AndData and 6360 OrData are stripped. The caller must either guarantee that Index and the data 6361 written is valid, or the caller must set up exception handlers to catch the 6362 exceptions. This function is only available on IA-32 and x64. 6363 6364 If StartBit is greater than 63, then ASSERT(). 6365 If EndBit is greater than 63, then ASSERT(). 6366 If EndBit is less than StartBit, then ASSERT(). 6367 If AndData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6368 If OrData is larger than the bitmask value range specified by StartBit and EndBit, then ASSERT(). 6369 6370 @param Index The 32-bit MSR index to write. 6371 @param StartBit The ordinal of the least significant bit in the bit field. 6372 Range 0..63. 6373 @param EndBit The ordinal of the most significant bit in the bit field. 6374 Range 0..63. 6375 @param AndData The value to AND with the read value from the bit field. 6376 @param OrData The value to OR with the result of the AND operation. 6377 6378 @return The value written back to the MSR. 6379 6380 **/ 6381 UINT64 6382 EFIAPI 6383 AsmMsrBitFieldAndThenOr64 ( 6384 IN UINT32 Index, 6385 IN UINTN StartBit, 6386 IN UINTN EndBit, 6387 IN UINT64 AndData, 6388 IN UINT64 OrData 6389 ); 6390 6391 6392 /** 6393 Reads the current value of the EFLAGS register. 6394 6395 Reads and returns the current value of the EFLAGS register. This function is 6396 only available on IA-32 and x64. This returns a 32-bit value on IA-32 and a 6397 64-bit value on x64. 6398 6399 @return EFLAGS on IA-32 or RFLAGS on x64. 6400 6401 **/ 6402 UINTN 6403 EFIAPI 6404 AsmReadEflags ( 6405 VOID 6406 ); 6407 6408 6409 /** 6410 Reads the current value of the Control Register 0 (CR0). 6411 6412 Reads and returns the current value of CR0. This function is only available 6413 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6414 x64. 6415 6416 @return The value of the Control Register 0 (CR0). 6417 6418 **/ 6419 UINTN 6420 EFIAPI 6421 AsmReadCr0 ( 6422 VOID 6423 ); 6424 6425 6426 /** 6427 Reads the current value of the Control Register 2 (CR2). 6428 6429 Reads and returns the current value of CR2. This function is only available 6430 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6431 x64. 6432 6433 @return The value of the Control Register 2 (CR2). 6434 6435 **/ 6436 UINTN 6437 EFIAPI 6438 AsmReadCr2 ( 6439 VOID 6440 ); 6441 6442 6443 /** 6444 Reads the current value of the Control Register 3 (CR3). 6445 6446 Reads and returns the current value of CR3. This function is only available 6447 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6448 x64. 6449 6450 @return The value of the Control Register 3 (CR3). 6451 6452 **/ 6453 UINTN 6454 EFIAPI 6455 AsmReadCr3 ( 6456 VOID 6457 ); 6458 6459 6460 /** 6461 Reads the current value of the Control Register 4 (CR4). 6462 6463 Reads and returns the current value of CR4. This function is only available 6464 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6465 x64. 6466 6467 @return The value of the Control Register 4 (CR4). 6468 6469 **/ 6470 UINTN 6471 EFIAPI 6472 AsmReadCr4 ( 6473 VOID 6474 ); 6475 6476 6477 /** 6478 Writes a value to Control Register 0 (CR0). 6479 6480 Writes and returns a new value to CR0. This function is only available on 6481 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6482 6483 @param Cr0 The value to write to CR0. 6484 6485 @return The value written to CR0. 6486 6487 **/ 6488 UINTN 6489 EFIAPI 6490 AsmWriteCr0 ( 6491 UINTN Cr0 6492 ); 6493 6494 6495 /** 6496 Writes a value to Control Register 2 (CR2). 6497 6498 Writes and returns a new value to CR2. This function is only available on 6499 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6500 6501 @param Cr2 The value to write to CR2. 6502 6503 @return The value written to CR2. 6504 6505 **/ 6506 UINTN 6507 EFIAPI 6508 AsmWriteCr2 ( 6509 UINTN Cr2 6510 ); 6511 6512 6513 /** 6514 Writes a value to Control Register 3 (CR3). 6515 6516 Writes and returns a new value to CR3. This function is only available on 6517 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6518 6519 @param Cr3 The value to write to CR3. 6520 6521 @return The value written to CR3. 6522 6523 **/ 6524 UINTN 6525 EFIAPI 6526 AsmWriteCr3 ( 6527 UINTN Cr3 6528 ); 6529 6530 6531 /** 6532 Writes a value to Control Register 4 (CR4). 6533 6534 Writes and returns a new value to CR4. This function is only available on 6535 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6536 6537 @param Cr4 The value to write to CR4. 6538 6539 @return The value written to CR4. 6540 6541 **/ 6542 UINTN 6543 EFIAPI 6544 AsmWriteCr4 ( 6545 UINTN Cr4 6546 ); 6547 6548 6549 /** 6550 Reads the current value of Debug Register 0 (DR0). 6551 6552 Reads and returns the current value of DR0. This function is only available 6553 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6554 x64. 6555 6556 @return The value of Debug Register 0 (DR0). 6557 6558 **/ 6559 UINTN 6560 EFIAPI 6561 AsmReadDr0 ( 6562 VOID 6563 ); 6564 6565 6566 /** 6567 Reads the current value of Debug Register 1 (DR1). 6568 6569 Reads and returns the current value of DR1. This function is only available 6570 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6571 x64. 6572 6573 @return The value of Debug Register 1 (DR1). 6574 6575 **/ 6576 UINTN 6577 EFIAPI 6578 AsmReadDr1 ( 6579 VOID 6580 ); 6581 6582 6583 /** 6584 Reads the current value of Debug Register 2 (DR2). 6585 6586 Reads and returns the current value of DR2. This function is only available 6587 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6588 x64. 6589 6590 @return The value of Debug Register 2 (DR2). 6591 6592 **/ 6593 UINTN 6594 EFIAPI 6595 AsmReadDr2 ( 6596 VOID 6597 ); 6598 6599 6600 /** 6601 Reads the current value of Debug Register 3 (DR3). 6602 6603 Reads and returns the current value of DR3. This function is only available 6604 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6605 x64. 6606 6607 @return The value of Debug Register 3 (DR3). 6608 6609 **/ 6610 UINTN 6611 EFIAPI 6612 AsmReadDr3 ( 6613 VOID 6614 ); 6615 6616 6617 /** 6618 Reads the current value of Debug Register 4 (DR4). 6619 6620 Reads and returns the current value of DR4. This function is only available 6621 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6622 x64. 6623 6624 @return The value of Debug Register 4 (DR4). 6625 6626 **/ 6627 UINTN 6628 EFIAPI 6629 AsmReadDr4 ( 6630 VOID 6631 ); 6632 6633 6634 /** 6635 Reads the current value of Debug Register 5 (DR5). 6636 6637 Reads and returns the current value of DR5. This function is only available 6638 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6639 x64. 6640 6641 @return The value of Debug Register 5 (DR5). 6642 6643 **/ 6644 UINTN 6645 EFIAPI 6646 AsmReadDr5 ( 6647 VOID 6648 ); 6649 6650 6651 /** 6652 Reads the current value of Debug Register 6 (DR6). 6653 6654 Reads and returns the current value of DR6. This function is only available 6655 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6656 x64. 6657 6658 @return The value of Debug Register 6 (DR6). 6659 6660 **/ 6661 UINTN 6662 EFIAPI 6663 AsmReadDr6 ( 6664 VOID 6665 ); 6666 6667 6668 /** 6669 Reads the current value of Debug Register 7 (DR7). 6670 6671 Reads and returns the current value of DR7. This function is only available 6672 on IA-32 and x64. This returns a 32-bit value on IA-32 and a 64-bit value on 6673 x64. 6674 6675 @return The value of Debug Register 7 (DR7). 6676 6677 **/ 6678 UINTN 6679 EFIAPI 6680 AsmReadDr7 ( 6681 VOID 6682 ); 6683 6684 6685 /** 6686 Writes a value to Debug Register 0 (DR0). 6687 6688 Writes and returns a new value to DR0. This function is only available on 6689 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6690 6691 @param Dr0 The value to write to Dr0. 6692 6693 @return The value written to Debug Register 0 (DR0). 6694 6695 **/ 6696 UINTN 6697 EFIAPI 6698 AsmWriteDr0 ( 6699 UINTN Dr0 6700 ); 6701 6702 6703 /** 6704 Writes a value to Debug Register 1 (DR1). 6705 6706 Writes and returns a new value to DR1. This function is only available on 6707 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6708 6709 @param Dr1 The value to write to Dr1. 6710 6711 @return The value written to Debug Register 1 (DR1). 6712 6713 **/ 6714 UINTN 6715 EFIAPI 6716 AsmWriteDr1 ( 6717 UINTN Dr1 6718 ); 6719 6720 6721 /** 6722 Writes a value to Debug Register 2 (DR2). 6723 6724 Writes and returns a new value to DR2. This function is only available on 6725 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6726 6727 @param Dr2 The value to write to Dr2. 6728 6729 @return The value written to Debug Register 2 (DR2). 6730 6731 **/ 6732 UINTN 6733 EFIAPI 6734 AsmWriteDr2 ( 6735 UINTN Dr2 6736 ); 6737 6738 6739 /** 6740 Writes a value to Debug Register 3 (DR3). 6741 6742 Writes and returns a new value to DR3. This function is only available on 6743 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6744 6745 @param Dr3 The value to write to Dr3. 6746 6747 @return The value written to Debug Register 3 (DR3). 6748 6749 **/ 6750 UINTN 6751 EFIAPI 6752 AsmWriteDr3 ( 6753 UINTN Dr3 6754 ); 6755 6756 6757 /** 6758 Writes a value to Debug Register 4 (DR4). 6759 6760 Writes and returns a new value to DR4. This function is only available on 6761 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6762 6763 @param Dr4 The value to write to Dr4. 6764 6765 @return The value written to Debug Register 4 (DR4). 6766 6767 **/ 6768 UINTN 6769 EFIAPI 6770 AsmWriteDr4 ( 6771 UINTN Dr4 6772 ); 6773 6774 6775 /** 6776 Writes a value to Debug Register 5 (DR5). 6777 6778 Writes and returns a new value to DR5. This function is only available on 6779 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6780 6781 @param Dr5 The value to write to Dr5. 6782 6783 @return The value written to Debug Register 5 (DR5). 6784 6785 **/ 6786 UINTN 6787 EFIAPI 6788 AsmWriteDr5 ( 6789 UINTN Dr5 6790 ); 6791 6792 6793 /** 6794 Writes a value to Debug Register 6 (DR6). 6795 6796 Writes and returns a new value to DR6. This function is only available on 6797 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6798 6799 @param Dr6 The value to write to Dr6. 6800 6801 @return The value written to Debug Register 6 (DR6). 6802 6803 **/ 6804 UINTN 6805 EFIAPI 6806 AsmWriteDr6 ( 6807 UINTN Dr6 6808 ); 6809 6810 6811 /** 6812 Writes a value to Debug Register 7 (DR7). 6813 6814 Writes and returns a new value to DR7. This function is only available on 6815 IA-32 and x64. This writes a 32-bit value on IA-32 and a 64-bit value on x64. 6816 6817 @param Dr7 The value to write to Dr7. 6818 6819 @return The value written to Debug Register 7 (DR7). 6820 6821 **/ 6822 UINTN 6823 EFIAPI 6824 AsmWriteDr7 ( 6825 UINTN Dr7 6826 ); 6827 6828 6829 /** 6830 Reads the current value of Code Segment Register (CS). 6831 6832 Reads and returns the current value of CS. This function is only available on 6833 IA-32 and x64. 6834 6835 @return The current value of CS. 6836 6837 **/ 6838 UINT16 6839 EFIAPI 6840 AsmReadCs ( 6841 VOID 6842 ); 6843 6844 6845 /** 6846 Reads the current value of Data Segment Register (DS). 6847 6848 Reads and returns the current value of DS. This function is only available on 6849 IA-32 and x64. 6850 6851 @return The current value of DS. 6852 6853 **/ 6854 UINT16 6855 EFIAPI 6856 AsmReadDs ( 6857 VOID 6858 ); 6859 6860 6861 /** 6862 Reads the current value of Extra Segment Register (ES). 6863 6864 Reads and returns the current value of ES. This function is only available on 6865 IA-32 and x64. 6866 6867 @return The current value of ES. 6868 6869 **/ 6870 UINT16 6871 EFIAPI 6872 AsmReadEs ( 6873 VOID 6874 ); 6875 6876 6877 /** 6878 Reads the current value of FS Data Segment Register (FS). 6879 6880 Reads and returns the current value of FS. This function is only available on 6881 IA-32 and x64. 6882 6883 @return The current value of FS. 6884 6885 **/ 6886 UINT16 6887 EFIAPI 6888 AsmReadFs ( 6889 VOID 6890 ); 6891 6892 6893 /** 6894 Reads the current value of GS Data Segment Register (GS). 6895 6896 Reads and returns the current value of GS. This function is only available on 6897 IA-32 and x64. 6898 6899 @return The current value of GS. 6900 6901 **/ 6902 UINT16 6903 EFIAPI 6904 AsmReadGs ( 6905 VOID 6906 ); 6907 6908 6909 /** 6910 Reads the current value of Stack Segment Register (SS). 6911 6912 Reads and returns the current value of SS. This function is only available on 6913 IA-32 and x64. 6914 6915 @return The current value of SS. 6916 6917 **/ 6918 UINT16 6919 EFIAPI 6920 AsmReadSs ( 6921 VOID 6922 ); 6923 6924 6925 /** 6926 Reads the current value of Task Register (TR). 6927 6928 Reads and returns the current value of TR. This function is only available on 6929 IA-32 and x64. 6930 6931 @return The current value of TR. 6932 6933 **/ 6934 UINT16 6935 EFIAPI 6936 AsmReadTr ( 6937 VOID 6938 ); 6939 6940 6941 /** 6942 Reads the current Global Descriptor Table Register(GDTR) descriptor. 6943 6944 Reads and returns the current GDTR descriptor and returns it in Gdtr. This 6945 function is only available on IA-32 and x64. 6946 6947 If Gdtr is NULL, then ASSERT(). 6948 6949 @param Gdtr The pointer to a GDTR descriptor. 6950 6951 **/ 6952 VOID 6953 EFIAPI 6954 AsmReadGdtr ( 6955 OUT IA32_DESCRIPTOR *Gdtr 6956 ); 6957 6958 6959 /** 6960 Writes the current Global Descriptor Table Register (GDTR) descriptor. 6961 6962 Writes and the current GDTR descriptor specified by Gdtr. This function is 6963 only available on IA-32 and x64. 6964 6965 If Gdtr is NULL, then ASSERT(). 6966 6967 @param Gdtr The pointer to a GDTR descriptor. 6968 6969 **/ 6970 VOID 6971 EFIAPI 6972 AsmWriteGdtr ( 6973 IN CONST IA32_DESCRIPTOR *Gdtr 6974 ); 6975 6976 6977 /** 6978 Reads the current Interrupt Descriptor Table Register(IDTR) descriptor. 6979 6980 Reads and returns the current IDTR descriptor and returns it in Idtr. This 6981 function is only available on IA-32 and x64. 6982 6983 If Idtr is NULL, then ASSERT(). 6984 6985 @param Idtr The pointer to a IDTR descriptor. 6986 6987 **/ 6988 VOID 6989 EFIAPI 6990 AsmReadIdtr ( 6991 OUT IA32_DESCRIPTOR *Idtr 6992 ); 6993 6994 6995 /** 6996 Writes the current Interrupt Descriptor Table Register(IDTR) descriptor. 6997 6998 Writes the current IDTR descriptor and returns it in Idtr. This function is 6999 only available on IA-32 and x64. 7000 7001 If Idtr is NULL, then ASSERT(). 7002 7003 @param Idtr The pointer to a IDTR descriptor. 7004 7005 **/ 7006 VOID 7007 EFIAPI 7008 AsmWriteIdtr ( 7009 IN CONST IA32_DESCRIPTOR *Idtr 7010 ); 7011 7012 7013 /** 7014 Reads the current Local Descriptor Table Register(LDTR) selector. 7015 7016 Reads and returns the current 16-bit LDTR descriptor value. This function is 7017 only available on IA-32 and x64. 7018 7019 @return The current selector of LDT. 7020 7021 **/ 7022 UINT16 7023 EFIAPI 7024 AsmReadLdtr ( 7025 VOID 7026 ); 7027 7028 7029 /** 7030 Writes the current Local Descriptor Table Register (LDTR) selector. 7031 7032 Writes and the current LDTR descriptor specified by Ldtr. This function is 7033 only available on IA-32 and x64. 7034 7035 @param Ldtr 16-bit LDTR selector value. 7036 7037 **/ 7038 VOID 7039 EFIAPI 7040 AsmWriteLdtr ( 7041 IN UINT16 Ldtr 7042 ); 7043 7044 7045 /** 7046 Save the current floating point/SSE/SSE2 context to a buffer. 7047 7048 Saves the current floating point/SSE/SSE2 state to the buffer specified by 7049 Buffer. Buffer must be aligned on a 16-byte boundary. This function is only 7050 available on IA-32 and x64. 7051 7052 If Buffer is NULL, then ASSERT(). 7053 If Buffer is not aligned on a 16-byte boundary, then ASSERT(). 7054 7055 @param Buffer The pointer to a buffer to save the floating point/SSE/SSE2 context. 7056 7057 **/ 7058 VOID 7059 EFIAPI 7060 AsmFxSave ( 7061 OUT IA32_FX_BUFFER *Buffer 7062 ); 7063 7064 7065 /** 7066 Restores the current floating point/SSE/SSE2 context from a buffer. 7067 7068 Restores the current floating point/SSE/SSE2 state from the buffer specified 7069 by Buffer. Buffer must be aligned on a 16-byte boundary. This function is 7070 only available on IA-32 and x64. 7071 7072 If Buffer is NULL, then ASSERT(). 7073 If Buffer is not aligned on a 16-byte boundary, then ASSERT(). 7074 If Buffer was not saved with AsmFxSave(), then ASSERT(). 7075 7076 @param Buffer The pointer to a buffer to save the floating point/SSE/SSE2 context. 7077 7078 **/ 7079 VOID 7080 EFIAPI 7081 AsmFxRestore ( 7082 IN CONST IA32_FX_BUFFER *Buffer 7083 ); 7084 7085 7086 /** 7087 Reads the current value of 64-bit MMX Register #0 (MM0). 7088 7089 Reads and returns the current value of MM0. This function is only available 7090 on IA-32 and x64. 7091 7092 @return The current value of MM0. 7093 7094 **/ 7095 UINT64 7096 EFIAPI 7097 AsmReadMm0 ( 7098 VOID 7099 ); 7100 7101 7102 /** 7103 Reads the current value of 64-bit MMX Register #1 (MM1). 7104 7105 Reads and returns the current value of MM1. This function is only available 7106 on IA-32 and x64. 7107 7108 @return The current value of MM1. 7109 7110 **/ 7111 UINT64 7112 EFIAPI 7113 AsmReadMm1 ( 7114 VOID 7115 ); 7116 7117 7118 /** 7119 Reads the current value of 64-bit MMX Register #2 (MM2). 7120 7121 Reads and returns the current value of MM2. This function is only available 7122 on IA-32 and x64. 7123 7124 @return The current value of MM2. 7125 7126 **/ 7127 UINT64 7128 EFIAPI 7129 AsmReadMm2 ( 7130 VOID 7131 ); 7132 7133 7134 /** 7135 Reads the current value of 64-bit MMX Register #3 (MM3). 7136 7137 Reads and returns the current value of MM3. This function is only available 7138 on IA-32 and x64. 7139 7140 @return The current value of MM3. 7141 7142 **/ 7143 UINT64 7144 EFIAPI 7145 AsmReadMm3 ( 7146 VOID 7147 ); 7148 7149 7150 /** 7151 Reads the current value of 64-bit MMX Register #4 (MM4). 7152 7153 Reads and returns the current value of MM4. This function is only available 7154 on IA-32 and x64. 7155 7156 @return The current value of MM4. 7157 7158 **/ 7159 UINT64 7160 EFIAPI 7161 AsmReadMm4 ( 7162 VOID 7163 ); 7164 7165 7166 /** 7167 Reads the current value of 64-bit MMX Register #5 (MM5). 7168 7169 Reads and returns the current value of MM5. This function is only available 7170 on IA-32 and x64. 7171 7172 @return The current value of MM5. 7173 7174 **/ 7175 UINT64 7176 EFIAPI 7177 AsmReadMm5 ( 7178 VOID 7179 ); 7180 7181 7182 /** 7183 Reads the current value of 64-bit MMX Register #6 (MM6). 7184 7185 Reads and returns the current value of MM6. This function is only available 7186 on IA-32 and x64. 7187 7188 @return The current value of MM6. 7189 7190 **/ 7191 UINT64 7192 EFIAPI 7193 AsmReadMm6 ( 7194 VOID 7195 ); 7196 7197 7198 /** 7199 Reads the current value of 64-bit MMX Register #7 (MM7). 7200 7201 Reads and returns the current value of MM7. This function is only available 7202 on IA-32 and x64. 7203 7204 @return The current value of MM7. 7205 7206 **/ 7207 UINT64 7208 EFIAPI 7209 AsmReadMm7 ( 7210 VOID 7211 ); 7212 7213 7214 /** 7215 Writes the current value of 64-bit MMX Register #0 (MM0). 7216 7217 Writes the current value of MM0. This function is only available on IA32 and 7218 x64. 7219 7220 @param Value The 64-bit value to write to MM0. 7221 7222 **/ 7223 VOID 7224 EFIAPI 7225 AsmWriteMm0 ( 7226 IN UINT64 Value 7227 ); 7228 7229 7230 /** 7231 Writes the current value of 64-bit MMX Register #1 (MM1). 7232 7233 Writes the current value of MM1. This function is only available on IA32 and 7234 x64. 7235 7236 @param Value The 64-bit value to write to MM1. 7237 7238 **/ 7239 VOID 7240 EFIAPI 7241 AsmWriteMm1 ( 7242 IN UINT64 Value 7243 ); 7244 7245 7246 /** 7247 Writes the current value of 64-bit MMX Register #2 (MM2). 7248 7249 Writes the current value of MM2. This function is only available on IA32 and 7250 x64. 7251 7252 @param Value The 64-bit value to write to MM2. 7253 7254 **/ 7255 VOID 7256 EFIAPI 7257 AsmWriteMm2 ( 7258 IN UINT64 Value 7259 ); 7260 7261 7262 /** 7263 Writes the current value of 64-bit MMX Register #3 (MM3). 7264 7265 Writes the current value of MM3. This function is only available on IA32 and 7266 x64. 7267 7268 @param Value The 64-bit value to write to MM3. 7269 7270 **/ 7271 VOID 7272 EFIAPI 7273 AsmWriteMm3 ( 7274 IN UINT64 Value 7275 ); 7276 7277 7278 /** 7279 Writes the current value of 64-bit MMX Register #4 (MM4). 7280 7281 Writes the current value of MM4. This function is only available on IA32 and 7282 x64. 7283 7284 @param Value The 64-bit value to write to MM4. 7285 7286 **/ 7287 VOID 7288 EFIAPI 7289 AsmWriteMm4 ( 7290 IN UINT64 Value 7291 ); 7292 7293 7294 /** 7295 Writes the current value of 64-bit MMX Register #5 (MM5). 7296 7297 Writes the current value of MM5. This function is only available on IA32 and 7298 x64. 7299 7300 @param Value The 64-bit value to write to MM5. 7301 7302 **/ 7303 VOID 7304 EFIAPI 7305 AsmWriteMm5 ( 7306 IN UINT64 Value 7307 ); 7308 7309 7310 /** 7311 Writes the current value of 64-bit MMX Register #6 (MM6). 7312 7313 Writes the current value of MM6. This function is only available on IA32 and 7314 x64. 7315 7316 @param Value The 64-bit value to write to MM6. 7317 7318 **/ 7319 VOID 7320 EFIAPI 7321 AsmWriteMm6 ( 7322 IN UINT64 Value 7323 ); 7324 7325 7326 /** 7327 Writes the current value of 64-bit MMX Register #7 (MM7). 7328 7329 Writes the current value of MM7. This function is only available on IA32 and 7330 x64. 7331 7332 @param Value The 64-bit value to write to MM7. 7333 7334 **/ 7335 VOID 7336 EFIAPI 7337 AsmWriteMm7 ( 7338 IN UINT64 Value 7339 ); 7340 7341 7342 /** 7343 Reads the current value of Time Stamp Counter (TSC). 7344 7345 Reads and returns the current value of TSC. This function is only available 7346 on IA-32 and x64. 7347 7348 @return The current value of TSC 7349 7350 **/ 7351 UINT64 7352 EFIAPI 7353 AsmReadTsc ( 7354 VOID 7355 ); 7356 7357 7358 /** 7359 Reads the current value of a Performance Counter (PMC). 7360 7361 Reads and returns the current value of performance counter specified by 7362 Index. This function is only available on IA-32 and x64. 7363 7364 @param Index The 32-bit Performance Counter index to read. 7365 7366 @return The value of the PMC specified by Index. 7367 7368 **/ 7369 UINT64 7370 EFIAPI 7371 AsmReadPmc ( 7372 IN UINT32 Index 7373 ); 7374 7375 7376 /** 7377 Sets up a monitor buffer that is used by AsmMwait(). 7378 7379 Executes a MONITOR instruction with the register state specified by Eax, Ecx 7380 and Edx. Returns Eax. This function is only available on IA-32 and x64. 7381 7382 @param Eax The value to load into EAX or RAX before executing the MONITOR 7383 instruction. 7384 @param Ecx The value to load into ECX or RCX before executing the MONITOR 7385 instruction. 7386 @param Edx The value to load into EDX or RDX before executing the MONITOR 7387 instruction. 7388 7389 @return Eax 7390 7391 **/ 7392 UINTN 7393 EFIAPI 7394 AsmMonitor ( 7395 IN UINTN Eax, 7396 IN UINTN Ecx, 7397 IN UINTN Edx 7398 ); 7399 7400 7401 /** 7402 Executes an MWAIT instruction. 7403 7404 Executes an MWAIT instruction with the register state specified by Eax and 7405 Ecx. Returns Eax. This function is only available on IA-32 and x64. 7406 7407 @param Eax The value to load into EAX or RAX before executing the MONITOR 7408 instruction. 7409 @param Ecx The value to load into ECX or RCX before executing the MONITOR 7410 instruction. 7411 7412 @return Eax 7413 7414 **/ 7415 UINTN 7416 EFIAPI 7417 AsmMwait ( 7418 IN UINTN Eax, 7419 IN UINTN Ecx 7420 ); 7421 7422 7423 /** 7424 Executes a WBINVD instruction. 7425 7426 Executes a WBINVD instruction. This function is only available on IA-32 and 7427 x64. 7428 7429 **/ 7430 VOID 7431 EFIAPI 7432 AsmWbinvd ( 7433 VOID 7434 ); 7435 7436 7437 /** 7438 Executes a INVD instruction. 7439 7440 Executes a INVD instruction. This function is only available on IA-32 and 7441 x64. 7442 7443 **/ 7444 VOID 7445 EFIAPI 7446 AsmInvd ( 7447 VOID 7448 ); 7449 7450 7451 /** 7452 Flushes a cache line from all the instruction and data caches within the 7453 coherency domain of the CPU. 7454 7455 Flushed the cache line specified by LinearAddress, and returns LinearAddress. 7456 This function is only available on IA-32 and x64. 7457 7458 @param LinearAddress The address of the cache line to flush. If the CPU is 7459 in a physical addressing mode, then LinearAddress is a 7460 physical address. If the CPU is in a virtual 7461 addressing mode, then LinearAddress is a virtual 7462 address. 7463 7464 @return LinearAddress. 7465 **/ 7466 VOID * 7467 EFIAPI 7468 AsmFlushCacheLine ( 7469 IN VOID *LinearAddress 7470 ); 7471 7472 7473 /** 7474 Enables the 32-bit paging mode on the CPU. 7475 7476 Enables the 32-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables 7477 must be properly initialized prior to calling this service. This function 7478 assumes the current execution mode is 32-bit protected mode. This function is 7479 only available on IA-32. After the 32-bit paging mode is enabled, control is 7480 transferred to the function specified by EntryPoint using the new stack 7481 specified by NewStack and passing in the parameters specified by Context1 and 7482 Context2. Context1 and Context2 are optional and may be NULL. The function 7483 EntryPoint must never return. 7484 7485 If the current execution mode is not 32-bit protected mode, then ASSERT(). 7486 If EntryPoint is NULL, then ASSERT(). 7487 If NewStack is NULL, then ASSERT(). 7488 7489 There are a number of constraints that must be followed before calling this 7490 function: 7491 1) Interrupts must be disabled. 7492 2) The caller must be in 32-bit protected mode with flat descriptors. This 7493 means all descriptors must have a base of 0 and a limit of 4GB. 7494 3) CR0 and CR4 must be compatible with 32-bit protected mode with flat 7495 descriptors. 7496 4) CR3 must point to valid page tables that will be used once the transition 7497 is complete, and those page tables must guarantee that the pages for this 7498 function and the stack are identity mapped. 7499 7500 @param EntryPoint A pointer to function to call with the new stack after 7501 paging is enabled. 7502 @param Context1 A pointer to the context to pass into the EntryPoint 7503 function as the first parameter after paging is enabled. 7504 @param Context2 A pointer to the context to pass into the EntryPoint 7505 function as the second parameter after paging is enabled. 7506 @param NewStack A pointer to the new stack to use for the EntryPoint 7507 function after paging is enabled. 7508 7509 **/ 7510 VOID 7511 EFIAPI 7512 AsmEnablePaging32 ( 7513 IN SWITCH_STACK_ENTRY_POINT EntryPoint, 7514 IN VOID *Context1, OPTIONAL 7515 IN VOID *Context2, OPTIONAL 7516 IN VOID *NewStack 7517 ); 7518 7519 7520 /** 7521 Disables the 32-bit paging mode on the CPU. 7522 7523 Disables the 32-bit paging mode on the CPU and returns to 32-bit protected 7524 mode. This function assumes the current execution mode is 32-paged protected 7525 mode. This function is only available on IA-32. After the 32-bit paging mode 7526 is disabled, control is transferred to the function specified by EntryPoint 7527 using the new stack specified by NewStack and passing in the parameters 7528 specified by Context1 and Context2. Context1 and Context2 are optional and 7529 may be NULL. The function EntryPoint must never return. 7530 7531 If the current execution mode is not 32-bit paged mode, then ASSERT(). 7532 If EntryPoint is NULL, then ASSERT(). 7533 If NewStack is NULL, then ASSERT(). 7534 7535 There are a number of constraints that must be followed before calling this 7536 function: 7537 1) Interrupts must be disabled. 7538 2) The caller must be in 32-bit paged mode. 7539 3) CR0, CR3, and CR4 must be compatible with 32-bit paged mode. 7540 4) CR3 must point to valid page tables that guarantee that the pages for 7541 this function and the stack are identity mapped. 7542 7543 @param EntryPoint A pointer to function to call with the new stack after 7544 paging is disabled. 7545 @param Context1 A pointer to the context to pass into the EntryPoint 7546 function as the first parameter after paging is disabled. 7547 @param Context2 A pointer to the context to pass into the EntryPoint 7548 function as the second parameter after paging is 7549 disabled. 7550 @param NewStack A pointer to the new stack to use for the EntryPoint 7551 function after paging is disabled. 7552 7553 **/ 7554 VOID 7555 EFIAPI 7556 AsmDisablePaging32 ( 7557 IN SWITCH_STACK_ENTRY_POINT EntryPoint, 7558 IN VOID *Context1, OPTIONAL 7559 IN VOID *Context2, OPTIONAL 7560 IN VOID *NewStack 7561 ); 7562 7563 7564 /** 7565 Enables the 64-bit paging mode on the CPU. 7566 7567 Enables the 64-bit paging mode on the CPU. CR0, CR3, CR4, and the page tables 7568 must be properly initialized prior to calling this service. This function 7569 assumes the current execution mode is 32-bit protected mode with flat 7570 descriptors. This function is only available on IA-32. After the 64-bit 7571 paging mode is enabled, control is transferred to the function specified by 7572 EntryPoint using the new stack specified by NewStack and passing in the 7573 parameters specified by Context1 and Context2. Context1 and Context2 are 7574 optional and may be 0. The function EntryPoint must never return. 7575 7576 If the current execution mode is not 32-bit protected mode with flat 7577 descriptors, then ASSERT(). 7578 If EntryPoint is 0, then ASSERT(). 7579 If NewStack is 0, then ASSERT(). 7580 7581 @param Cs The 16-bit selector to load in the CS before EntryPoint 7582 is called. The descriptor in the GDT that this selector 7583 references must be setup for long mode. 7584 @param EntryPoint The 64-bit virtual address of the function to call with 7585 the new stack after paging is enabled. 7586 @param Context1 The 64-bit virtual address of the context to pass into 7587 the EntryPoint function as the first parameter after 7588 paging is enabled. 7589 @param Context2 The 64-bit virtual address of the context to pass into 7590 the EntryPoint function as the second parameter after 7591 paging is enabled. 7592 @param NewStack The 64-bit virtual address of the new stack to use for 7593 the EntryPoint function after paging is enabled. 7594 7595 **/ 7596 VOID 7597 EFIAPI 7598 AsmEnablePaging64 ( 7599 IN UINT16 Cs, 7600 IN UINT64 EntryPoint, 7601 IN UINT64 Context1, OPTIONAL 7602 IN UINT64 Context2, OPTIONAL 7603 IN UINT64 NewStack 7604 ); 7605 7606 7607 /** 7608 Disables the 64-bit paging mode on the CPU. 7609 7610 Disables the 64-bit paging mode on the CPU and returns to 32-bit protected 7611 mode. This function assumes the current execution mode is 64-paging mode. 7612 This function is only available on x64. After the 64-bit paging mode is 7613 disabled, control is transferred to the function specified by EntryPoint 7614 using the new stack specified by NewStack and passing in the parameters 7615 specified by Context1 and Context2. Context1 and Context2 are optional and 7616 may be 0. The function EntryPoint must never return. 7617 7618 If the current execution mode is not 64-bit paged mode, then ASSERT(). 7619 If EntryPoint is 0, then ASSERT(). 7620 If NewStack is 0, then ASSERT(). 7621 7622 @param Cs The 16-bit selector to load in the CS before EntryPoint 7623 is called. The descriptor in the GDT that this selector 7624 references must be setup for 32-bit protected mode. 7625 @param EntryPoint The 64-bit virtual address of the function to call with 7626 the new stack after paging is disabled. 7627 @param Context1 The 64-bit virtual address of the context to pass into 7628 the EntryPoint function as the first parameter after 7629 paging is disabled. 7630 @param Context2 The 64-bit virtual address of the context to pass into 7631 the EntryPoint function as the second parameter after 7632 paging is disabled. 7633 @param NewStack The 64-bit virtual address of the new stack to use for 7634 the EntryPoint function after paging is disabled. 7635 7636 **/ 7637 VOID 7638 EFIAPI 7639 AsmDisablePaging64 ( 7640 IN UINT16 Cs, 7641 IN UINT32 EntryPoint, 7642 IN UINT32 Context1, OPTIONAL 7643 IN UINT32 Context2, OPTIONAL 7644 IN UINT32 NewStack 7645 ); 7646 7647 7648 // 7649 // 16-bit thunking services 7650 // 7651 7652 /** 7653 Retrieves the properties for 16-bit thunk functions. 7654 7655 Computes the size of the buffer and stack below 1MB required to use the 7656 AsmPrepareThunk16(), AsmThunk16() and AsmPrepareAndThunk16() functions. This 7657 buffer size is returned in RealModeBufferSize, and the stack size is returned 7658 in ExtraStackSize. If parameters are passed to the 16-bit real mode code, 7659 then the actual minimum stack size is ExtraStackSize plus the maximum number 7660 of bytes that need to be passed to the 16-bit real mode code. 7661 7662 If RealModeBufferSize is NULL, then ASSERT(). 7663 If ExtraStackSize is NULL, then ASSERT(). 7664 7665 @param RealModeBufferSize A pointer to the size of the buffer below 1MB 7666 required to use the 16-bit thunk functions. 7667 @param ExtraStackSize A pointer to the extra size of stack below 1MB 7668 that the 16-bit thunk functions require for 7669 temporary storage in the transition to and from 7670 16-bit real mode. 7671 7672 **/ 7673 VOID 7674 EFIAPI 7675 AsmGetThunk16Properties ( 7676 OUT UINT32 *RealModeBufferSize, 7677 OUT UINT32 *ExtraStackSize 7678 ); 7679 7680 7681 /** 7682 Prepares all structures a code required to use AsmThunk16(). 7683 7684 Prepares all structures and code required to use AsmThunk16(). 7685 7686 This interface is limited to be used in either physical mode or virtual modes with paging enabled where the 7687 virtual to physical mappings for ThunkContext.RealModeBuffer is mapped 1:1. 7688 7689 If ThunkContext is NULL, then ASSERT(). 7690 7691 @param ThunkContext A pointer to the context structure that describes the 7692 16-bit real mode code to call. 7693 7694 **/ 7695 VOID 7696 EFIAPI 7697 AsmPrepareThunk16 ( 7698 IN OUT THUNK_CONTEXT *ThunkContext 7699 ); 7700 7701 7702 /** 7703 Transfers control to a 16-bit real mode entry point and returns the results. 7704 7705 Transfers control to a 16-bit real mode entry point and returns the results. 7706 AsmPrepareThunk16() must be called with ThunkContext before this function is used. 7707 This function must be called with interrupts disabled. 7708 7709 The register state from the RealModeState field of ThunkContext is restored just prior 7710 to calling the 16-bit real mode entry point. This includes the EFLAGS field of RealModeState, 7711 which is used to set the interrupt state when a 16-bit real mode entry point is called. 7712 Control is transferred to the 16-bit real mode entry point specified by the CS and Eip fields of RealModeState. 7713 The stack is initialized to the SS and ESP fields of RealModeState. Any parameters passed to 7714 the 16-bit real mode code must be populated by the caller at SS:ESP prior to calling this function. 7715 The 16-bit real mode entry point is invoked with a 16-bit CALL FAR instruction, 7716 so when accessing stack contents, the 16-bit real mode code must account for the 16-bit segment 7717 and 16-bit offset of the return address that were pushed onto the stack. The 16-bit real mode entry 7718 point must exit with a RETF instruction. The register state is captured into RealModeState immediately 7719 after the RETF instruction is executed. 7720 7721 If EFLAGS specifies interrupts enabled, or any of the 16-bit real mode code enables interrupts, 7722 or any of the 16-bit real mode code makes a SW interrupt, then the caller is responsible for making sure 7723 the IDT at address 0 is initialized to handle any HW or SW interrupts that may occur while in 16-bit real mode. 7724 7725 If EFLAGS specifies interrupts enabled, or any of the 16-bit real mode code enables interrupts, 7726 then the caller is responsible for making sure the 8259 PIC is in a state compatible with 16-bit real mode. 7727 This includes the base vectors, the interrupt masks, and the edge/level trigger mode. 7728 7729 If THUNK_ATTRIBUTE_BIG_REAL_MODE is set in the ThunkAttributes field of ThunkContext, then the user code 7730 is invoked in big real mode. Otherwise, the user code is invoked in 16-bit real mode with 64KB segment limits. 7731 7732 If neither THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 nor THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL are set in 7733 ThunkAttributes, then it is assumed that the user code did not enable the A20 mask, and no attempt is made to 7734 disable the A20 mask. 7735 7736 If THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 is set and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL is clear in 7737 ThunkAttributes, then attempt to use the INT 15 service to disable the A20 mask. If this INT 15 call fails, 7738 then attempt to disable the A20 mask by directly accessing the 8042 keyboard controller I/O ports. 7739 7740 If THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 is clear and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL is set in 7741 ThunkAttributes, then attempt to disable the A20 mask by directly accessing the 8042 keyboard controller I/O ports. 7742 7743 If ThunkContext is NULL, then ASSERT(). 7744 If AsmPrepareThunk16() was not previously called with ThunkContext, then ASSERT(). 7745 If both THUNK_ATTRIBUTE_DISABLE_A20_MASK_INT_15 and THUNK_ATTRIBUTE_DISABLE_A20_MASK_KBD_CTRL are set in 7746 ThunkAttributes, then ASSERT(). 7747 7748 This interface is limited to be used in either physical mode or virtual modes with paging enabled where the 7749 virtual to physical mappings for ThunkContext.RealModeBuffer are mapped 1:1. 7750 7751 @param ThunkContext A pointer to the context structure that describes the 7752 16-bit real mode code to call. 7753 7754 **/ 7755 VOID 7756 EFIAPI 7757 AsmThunk16 ( 7758 IN OUT THUNK_CONTEXT *ThunkContext 7759 ); 7760 7761 7762 /** 7763 Prepares all structures and code for a 16-bit real mode thunk, transfers 7764 control to a 16-bit real mode entry point, and returns the results. 7765 7766 Prepares all structures and code for a 16-bit real mode thunk, transfers 7767 control to a 16-bit real mode entry point, and returns the results. If the 7768 caller only need to perform a single 16-bit real mode thunk, then this 7769 service should be used. If the caller intends to make more than one 16-bit 7770 real mode thunk, then it is more efficient if AsmPrepareThunk16() is called 7771 once and AsmThunk16() can be called for each 16-bit real mode thunk. 7772 7773 This interface is limited to be used in either physical mode or virtual modes with paging enabled where the 7774 virtual to physical mappings for ThunkContext.RealModeBuffer is mapped 1:1. 7775 7776 See AsmPrepareThunk16() and AsmThunk16() for the detailed description and ASSERT() conditions. 7777 7778 @param ThunkContext A pointer to the context structure that describes the 7779 16-bit real mode code to call. 7780 7781 **/ 7782 VOID 7783 EFIAPI 7784 AsmPrepareAndThunk16 ( 7785 IN OUT THUNK_CONTEXT *ThunkContext 7786 ); 7787 7788 /** 7789 Generates a 16-bit random number through RDRAND instruction. 7790 7791 if Rand is NULL, then ASSERT(). 7792 7793 @param[out] Rand Buffer pointer to store the random result. 7794 7795 @retval TRUE RDRAND call was successful. 7796 @retval FALSE Failed attempts to call RDRAND. 7797 7798 **/ 7799 BOOLEAN 7800 EFIAPI 7801 AsmRdRand16 ( 7802 OUT UINT16 *Rand 7803 ); 7804 7805 /** 7806 Generates a 32-bit random number through RDRAND instruction. 7807 7808 if Rand is NULL, then ASSERT(). 7809 7810 @param[out] Rand Buffer pointer to store the random result. 7811 7812 @retval TRUE RDRAND call was successful. 7813 @retval FALSE Failed attempts to call RDRAND. 7814 7815 **/ 7816 BOOLEAN 7817 EFIAPI 7818 AsmRdRand32 ( 7819 OUT UINT32 *Rand 7820 ); 7821 7822 /** 7823 Generates a 64-bit random number through RDRAND instruction. 7824 7825 if Rand is NULL, then ASSERT(). 7826 7827 @param[out] Rand Buffer pointer to store the random result. 7828 7829 @retval TRUE RDRAND call was successful. 7830 @retval FALSE Failed attempts to call RDRAND. 7831 7832 **/ 7833 BOOLEAN 7834 EFIAPI 7835 AsmRdRand64 ( 7836 OUT UINT64 *Rand 7837 ); 7838 7839 #endif 7840 #endif 7841 7842 7843