MdePkg/Include/Library/S3BootScriptLib.h

   1 /** @file
   2   Defines library APIs used by modules to save EFI Boot Script Opcodes.
   3   These OpCode will be restored by S3 related modules.
   4   Note that some of the API defined in the Library class may not
   5   be provided in the Framework version library instance, which means some of these
   6   APIs cannot be used if the underlying firmware is Framework and not PI.
   7
   8   Copyright (c) 2006 - 2018, Intel Corporation. All rights reserved.<BR>
   9
  10   This program and the accompanying materials
  11   are licensed and made available under the terms and conditions
  12   of the BSD License which accompanies this distribution.  The
  13   full text of the license may be found at
  14   http://opensource.org/licenses/bsd-license.php
  15
  16   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  17   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  18
  19 **/
  20
  21 #ifndef _S3_BOOT_SCRIPT_LIB_H_
  22 #define _S3_BOOT_SCRIPT_LIB_H_
  23
  24 #include <Library/BaseLib.h>
  25 #include <IndustryStandard/SmBus.h>
  26
  27 /**
  28   Macro that converts PCI Bus, PCI Device, PCI Function and PCI Register to an
  29   address that can be passed to the S3 Boot Script Library PCI functions.
  30
  31   @param  Bus       PCI Bus number. Range 0..255.
  32   @param  Device    PCI Device number. Range 0..31.
  33   @param  Function  PCI Function number. Range 0..7.
  34   @param  Register  PCI Register number. Range 0..255 for PCI. Range 0..4095
  35                     for PCI Express.
  36
  37   @return The encoded PCI address.
  38
  39 **/
  40 #define S3_BOOT_SCRIPT_LIB_PCI_ADDRESS(Bus,Device,Function,Register)   \
  41   (UINT64) ( \
  42   (((UINTN) Bus) << 24) | \
  43   (((UINTN) Device) << 16) | \
  44   (((UINTN) Function) << 8) | \
  45   (((UINTN) (Register)) < 256 ? ((UINTN) (Register)) : (UINT64) (LShiftU64 ((UINT64) (Register), 32))))
  46
  47 ///
  48 /// S3 Boot Script Width.
  49 ///
  50 typedef enum {
  51   S3BootScriptWidthUint8,        ///< 8-bit operation.
  52   S3BootScriptWidthUint16,       ///< 16-bit operation.
  53   S3BootScriptWidthUint32,       ///< 32-bit operation.
  54   S3BootScriptWidthUint64,       ///< 64-bit operation.
  55   S3BootScriptWidthFifoUint8,    ///< 8-bit FIFO operation.
  56   S3BootScriptWidthFifoUint16,   ///< 16-bit FIFO operation.
  57   S3BootScriptWidthFifoUint32,   ///< 32-bit FIFO operation.
  58   S3BootScriptWidthFifoUint64,   ///< 64-bit FIFO operation.
  59   S3BootScriptWidthFillUint8,    ///< 8-bit Fill operation.
  60   S3BootScriptWidthFillUint16,   ///< 16-bit Fill operation.
  61   S3BootScriptWidthFillUint32,   ///< 32-bit Fill operation.
  62   S3BootScriptWidthFillUint64,   ///< 64-bit Fill operation.
  63   S3BootScriptWidthMaximum
  64 } S3_BOOT_SCRIPT_LIB_WIDTH;
  65
  66 /**
  67   Save I/O write to boot script.
  68
  69   @param[in] Width     The width of the I/O operations.
  70   @param[in] Address   The base address of the I/O operations.
  71   @param[in] Count     The number of I/O operations to perform.
  72   @param[in] Buffer    The source buffer from which to write data.
  73
  74   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
  75                                     the operation.
  76   @retval RETURN_SUCCESS            The opcode was added.
  77
  78 **/
  79 RETURN_STATUS
  80 EFIAPI
  81 S3BootScriptSaveIoWrite (
  82   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
  83   IN  UINT64                    Address,
  84   IN  UINTN                     Count,
  85   IN  VOID                      *Buffer
  86   );
  87
  88 /**
  89   Adds a record for an I/O modify operation into a S3 boot script table.
  90
  91   @param[in] Width      The width of the I/O operations.
  92   @param[in] Address    The base address of the I/O operations.
  93   @param[in] Data       A pointer to the data to be OR-ed.
  94   @param[in] DataMask   A pointer to the data mask to be AND-ed with the data
  95                         read from the register.
  96
  97   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
  98                                     the operation.
  99   @retval RETURN_SUCCESS            The opcode was added.
 100
 101 **/
 102 RETURN_STATUS
 103 EFIAPI
 104 S3BootScriptSaveIoReadWrite (
 105   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 106   IN  UINT64                    Address,
 107   IN  VOID                      *Data,
 108   IN  VOID                      *DataMask
 109   );
 110
 111 /**
 112   Adds a record for a memory write operation into a specified boot script table.
 113
 114   @param[in] Width     The width of the I/O operations.
 115   @param[in] Address   The base address of the memory operations
 116   @param[in] Count     The number of memory operations to perform.
 117   @param[in] Buffer    The source buffer from which to write the data.
 118
 119   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 120                                     the operation.
 121   @retval RETURN_SUCCESS            The opcode was added.
 122 **/
 123 RETURN_STATUS
 124 EFIAPI
 125 S3BootScriptSaveMemWrite (
 126   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 127   IN  UINT64                    Address,
 128   IN  UINTN                     Count,
 129   IN  VOID                      *Buffer
 130   );
 131
 132 /**
 133   Adds a record for a memory modify operation into a specified boot script table.
 134
 135   @param[in] Width      The width of the I/O operations.
 136   @param[in] Address    The base address of the memory operations. Address needs
 137                         alignment, if required
 138   @param[in] Data       A pointer to the data to be OR-ed.
 139   @param[in] DataMask   A pointer to the data mask to be AND-ed with the data
 140                         read from the register.
 141
 142   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 143                                     the operation.
 144   @retval RETURN_SUCCESS            The opcode was added.
 145 **/
 146 RETURN_STATUS
 147 EFIAPI
 148 S3BootScriptSaveMemReadWrite (
 149   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 150   IN  UINT64                    Address,
 151   IN  VOID                      *Data,
 152   IN  VOID                      *DataMask
 153   );
 154
 155 /**
 156   Adds a record for a PCI configuration space write operation into a specified boot script table.
 157
 158   @param[in] Width     The width of the I/O operations.
 159   @param[in] Address   The address within the PCI configuration space.
 160   @param[in] Count     The number of PCI operations to perform.
 161   @param[in] Buffer    The source buffer from which to write the data.
 162
 163   @retval RETURN_OUT_OF_RESOURCES  Not enough memory for the table to perform
 164                                    the operation.
 165   @retval RETURN_SUCCESS           The opcode was added.
 166 **/
 167 RETURN_STATUS
 168 EFIAPI
 169 S3BootScriptSavePciCfgWrite (
 170   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 171   IN  UINT64                    Address,
 172   IN  UINTN                     Count,
 173   IN  VOID                      *Buffer
 174   );
 175
 176 /**
 177   Adds a record for a PCI configuration space modify operation into a specified boot script table.
 178
 179   @param[in] Width      The width of the I/O operations.
 180   @param[in] Address    The address within the PCI configuration space.
 181   @param[in] Data       A pointer to the data to be OR-ed.The size depends on Width.
 182   @param[in] DataMask   A pointer to the data mask to be AND-ed.
 183
 184   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 185                                     the operation.
 186   @retval RETURN__SUCCESS           The opcode was added.
 187 **/
 188 RETURN_STATUS
 189 EFIAPI
 190 S3BootScriptSavePciCfgReadWrite (
 191   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 192   IN  UINT64                    Address,
 193   IN  VOID                      *Data,
 194   IN  VOID                      *DataMask
 195   );
 196
 197 /**
 198   Adds a record for a PCI configuration space modify operation into a specified boot script table.
 199
 200   @param[in] Width     The width of the I/O operations.
 201   @param[in] Segment   The PCI segment number for Address.
 202   @param[in] Address   The address within the PCI configuration space.
 203   @param[in] Count     The number of PCI operations to perform.
 204   @param[in] Buffer    The source buffer from which to write the data.
 205
 206   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 207                                     the operation.
 208   @retval RETURN_SUCCESS            The opcode was added.
 209 **/
 210 RETURN_STATUS
 211 EFIAPI
 212 S3BootScriptSavePciCfg2Write (
 213   IN S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 214   IN UINT16                    Segment,
 215   IN UINT64                    Address,
 216   IN UINTN                     Count,
 217   IN VOID                      *Buffer
 218   );
 219
 220 /**
 221   Adds a record for a PCI configuration space modify operation into a specified boot script table.
 222
 223   @param[in] Width      The width of the I/O operations.
 224   @param[in] Segment    The PCI segment number for Address.
 225   @param[in] Address    The address within the PCI configuration space.
 226   @param[in] Data       A pointer to the data to be OR-ed. The size depends on Width.
 227   @param[in] DataMask   A pointer to the data mask to be AND-ed.
 228
 229   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 230                                     the operation.
 231   @retval RETURN_SUCCESS            The opcode was added.
 232 **/
 233 RETURN_STATUS
 234 EFIAPI
 235 S3BootScriptSavePciCfg2ReadWrite (
 236   IN S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 237   IN UINT16                    Segment,
 238   IN UINT64                    Address,
 239   IN VOID                      *Data,
 240   IN VOID                      *DataMask
 241   );
 242
 243 /**
 244   Adds a record for an SMBus command execution into a specified boot script table.
 245
 246   @param[in] SmBusAddress   Address that encodes the SMBUS Slave Address, SMBUS
 247                             Command, SMBUS Data Length, and PEC.
 248   @param[in] Operation      Indicates which particular SMBus protocol it will use
 249                             to execute the SMBus transactions.
 250   @param[in] Length         A pointer to signify the number of bytes that this
 251                             operation will do.
 252   @param[in] Buffer         Contains the value of data to execute to the SMBUS
 253                             slave device.
 254
 255   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 256                                     the operation.
 257   @retval RETURN_SUCCESS            The opcode was added.
 258 **/
 259 RETURN_STATUS
 260 EFIAPI
 261 S3BootScriptSaveSmbusExecute (
 262   IN  UINTN                SmBusAddress,
 263   IN  EFI_SMBUS_OPERATION  Operation,
 264   IN  UINTN                *Length,
 265   IN  VOID                 *Buffer
 266   );
 267
 268 /**
 269   Adds a record for an execution stall on the processor into a specified boot script table.
 270
 271   @param[in] Duration   The duration in microseconds of the stall.
 272
 273   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 274                                     the operation.
 275   @retval RETURN_SUCCESS            The opcode was added.
 276 **/
 277 RETURN_STATUS
 278 EFIAPI
 279 S3BootScriptSaveStall (
 280   IN  UINTN  Duration
 281   );
 282
 283 /**
 284   Adds a record for dispatching specified arbitrary code into a specified boot script table.
 285
 286   @param[in] EntryPoint   The entry point of the code to be dispatched.
 287   @param[in] Context      The argument to be passed into the EntryPoint of the code
 288                           to be dispatched.
 289
 290   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 291                                     the operation.
 292   @retval RETURN_SUCCESS            The opcode was added.
 293 **/
 294 RETURN_STATUS
 295 EFIAPI
 296 S3BootScriptSaveDispatch2 (
 297   IN  VOID  *EntryPoint,
 298   IN  VOID  *Context
 299   );
 300
 301 /**
 302   Adds a record for dispatching specified arbitrary code into a specified boot script table.
 303
 304   @param[in] EntryPoint   The entry point of the code to be dispatched.
 305
 306   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 307                                     the operation.
 308   @retval RETURN_SUCCESS            The opcode was added.
 309 **/
 310 RETURN_STATUS
 311 EFIAPI
 312 S3BootScriptSaveDispatch (
 313   IN  VOID *EntryPoint
 314   );
 315
 316 /**
 317   Adds a record for memory reads of the memory location and continues when the exit
 318   criteria is satisfied, or after a defined duration.
 319
 320   Please aware, below interface is different with PI specification, Vol 5:
 321   EFI_S3_SAVE_STATE_PROTOCOL.Write() for EFI_BOOT_SCRIPT_MEM_POLL_OPCODE.
 322   "Duration" below is microseconds, while "Delay" in PI specification means
 323   the number of 100ns units to poll.
 324
 325   @param[in] Width       The width of the memory operations.
 326   @param[in] Address     The base address of the memory operations.
 327   @param[in] BitMask     A pointer to the bit mask to be AND-ed with the data read
 328                          from the register.
 329   @param[in] BitValue    A pointer to the data value after to be Masked.
 330   @param[in] Duration    The duration in microseconds of the stall.
 331   @param[in] LoopTimes   The times of the register polling.
 332
 333   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 334                                     the operation.
 335   @retval RETURN_SUCCESS            The opcode was added.
 336
 337 **/
 338 RETURN_STATUS
 339 EFIAPI
 340 S3BootScriptSaveMemPoll (
 341   IN  S3_BOOT_SCRIPT_LIB_WIDTH  Width,
 342   IN  UINT64                    Address,
 343   IN  VOID                      *BitMask,
 344   IN  VOID                      *BitValue,
 345   IN  UINTN                     Duration,
 346   IN  UINT64                    LoopTimes
 347   );
 348
 349 /**
 350   Store arbitrary information in the boot script table. This opcode is a no-op on
 351   dispatch and is only used for debugging script issues.
 352
 353   @param[in] InformationLength   Length of the data in bytes
 354   @param[in] Information        Information to be logged in the boot scrpit
 355
 356   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 357                                     the operation.
 358   @retval RETURN_SUCCESS            The opcode was added.
 359
 360 **/
 361 RETURN_STATUS
 362 EFIAPI
 363 S3BootScriptSaveInformation (
 364   IN  UINT32  InformationLength,
 365   IN  VOID    *Information
 366   );
 367 /**
 368   Adds a record for I/O reads the I/O location and continues when the exit criteria
 369    is satisfied, or after a defined duration.
 370
 371   @param  Width                 The width of the I/O operations.
 372   @param  Address               The base address of the I/O operations.
 373   @param  Data                  The comparison value used for the polling exit criteria.
 374   @param  DataMask              The mask used for the polling criteria. The bits in
 375                                 the bytes below Width which are zero in Data are
 376                                 ignored when polling the memory address.
 377   @param  Delay                 The number of 100ns units to poll. Note that timer
 378                                 available may be of insufficient granularity, so the
 379                                 delay may be longer.
 380
 381  @retval RETURN_OUT_OF_RESOURCES  Not enough memory for the table to perform the
 382                                   operation.
 383  @retval RETURN_SUCCESS           The opcode was added.
 384  @note   The FRAMEWORK version implementation does not support this API
 385 **/
 386 RETURN_STATUS
 387 EFIAPI
 388 S3BootScriptSaveIoPoll (
 389   IN S3_BOOT_SCRIPT_LIB_WIDTH       Width,
 390   IN UINT64                     Address,
 391   IN VOID                      *Data,
 392   IN VOID                      *DataMask,
 393   IN UINT64                     Delay
 394   );
 395
 396 /**
 397   Adds a record for PCI configuration space reads and continues when the exit
 398   criteria is satisfied ,or after a defined duration.
 399
 400   @param  Width                 The width of the I/O operations.
 401   @param  Address               The address within the PCI configuration space.
 402   @param  Data                  The comparison value used for the polling exit
 403                                 criteria.
 404   @param  DataMask              Mask used for the polling criteria. The bits in
 405                                 the bytes below Width which are zero in Data are
 406                                 ignored when polling the memory address.
 407   @param  Delay                 The number of 100ns units to poll. Note that timer
 408                                 available may be of insufficient granularity, so the
 409                                 delay may be longer.
 410
 411  @retval RETURN_OUT_OF_RESOURCES  Not enough memory for the table to perform the
 412                                  operation.
 413  @retval RETURN_SUCCESS           The opcode was added.
 414  @note   The FRAMEWORK version implementation does not support this API
 415 **/
 416 RETURN_STATUS
 417 EFIAPI
 418 S3BootScriptSavePciPoll (
 419    IN S3_BOOT_SCRIPT_LIB_WIDTH   Width,
 420    IN UINT64                     Address,
 421    IN VOID                      *Data,
 422    IN VOID                      *DataMask,
 423    IN UINT64                     Delay
 424   );
 425 /**
 426   Adds a record for PCI configuration space reads and continues when the exit criteria
 427   is satisfied, or after a defined duration.
 428
 429   @param  Width                 The width of the I/O operations.
 430   @param  Segment               The PCI segment number for Address.
 431   @param  Address               The address within the PCI configuration space.
 432   @param  Data                  The comparison value used for the polling exit
 433                                 criteria.
 434   @param  DataMask              Mask used for the polling criteria. The bits in
 435                                 the bytes below Width which are zero
 436                                 in Data are ignored when polling the memory address
 437   @param  Delay                 The number of 100ns units to poll. Note that timer
 438                                 available may be of insufficient granularity so the delay
 439                                 may be longer.
 440
 441   @retval RETURN_OUT_OF_RESOURCES  Not enough memory for the table to perform the
 442                                    operation.
 443   @retval RETURN_SUCCESS           The opcode was added.
 444   @note  A known Limitations in the implementation: When interpreting the opcode
 445          EFI_BOOT_SCRIPT_PCI_CONFIG2_WRITE_OPCODE, EFI_BOOT_SCRIPT_PCI_CONFIG2_READ_WRITE_OPCODE
 446          and EFI_BOOT_SCRIPT_PCI_CONFIG2_POLL_OPCODE, the 'Segment' parameter is assumed as
 447          Zero, or else, assert.
 448          The FRAMEWORK version implementation does not support this API.
 449
 450 **/
 451 RETURN_STATUS
 452 EFIAPI
 453 S3BootScriptSavePci2Poll (
 454    IN S3_BOOT_SCRIPT_LIB_WIDTH      Width,
 455    IN UINT16                        Segment,
 456    IN UINT64                        Address,
 457    IN VOID                         *Data,
 458    IN VOID                         *DataMask,
 459    IN UINT64                        Delay
 460   );
 461 /**
 462   Save ASCII string information specified by Buffer to boot script with opcode
 463   EFI_BOOT_SCRIPT_INFORMATION_OPCODE.
 464
 465   @param[in] String   The Null-terminated ASCII string to store into the S3 boot
 466                       script table.
 467
 468   @retval RETURN_OUT_OF_RESOURCES   Not enough memory for the table to perform
 469                                     the operation.
 470   @retval RETURN_SUCCESS            The opcode was added.
 471
 472 **/
 473 RETURN_STATUS
 474 EFIAPI
 475 S3BootScriptSaveInformationAsciiString (
 476   IN  CONST CHAR8  *String
 477   );
 478
 479 /**
 480   This is an function to close the S3 boot script table. The function could only
 481   be called in BOOT time phase. To comply with the Framework spec definition on
 482   EFI_BOOT_SCRIPT_SAVE_PROTOCOL.CloseTable(), this function will fulfill following things:
 483   1. Closes the specified boot script table
 484   2. It allocates a new memory pool to duplicate all the boot scripts in the specified table.
 485      Once this function is called, the table maintained by the library will be destroyed
 486      after it is copied into the allocated pool.
 487   3. Any attempts to add a script record after calling this function will cause a
 488      new table to be created by the library.
 489   4. The base address of the allocated pool will be returned in Address. Note that
 490      after using the boot script table, the CALLER is responsible for freeing the
 491      pool that is allocated by this function.
 492
 493   In Spec PI1.1, this EFI_BOOT_SCRIPT_SAVE_PROTOCOL.CloseTable() is retired. This
 494   API is supplied here to meet the requirements of the Framework Spec.
 495
 496   If anyone does call CloseTable() on a real platform, then the caller is responsible
 497   for figuring out how to get the script to run on an S3 resume because the boot script
 498   maintained by the lib will be destroyed.
 499
 500   @return the base address of the new copy of the boot script table.
 501
 502 **/
 503 UINT8*
 504 EFIAPI
 505 S3BootScriptCloseTable (
 506   VOID
 507   );
 508
 509 /**
 510   Executes the S3 boot script table.
 511
 512   @retval RETURN_SUCCESS       The boot script table was executed successfully.
 513   @retval RETURN_UNSUPPORTED   Invalid script table or opcode.
 514
 515 **/
 516 RETURN_STATUS
 517 EFIAPI
 518 S3BootScriptExecute (
 519   VOID
 520   );
 521 /**
 522   Move the last boot script entry to the position
 523
 524   @param  BeforeOrAfter         Specifies whether the opcode is stored before
 525                                 (TRUE) or after (FALSE) the positionin the boot
 526                                 script table specified by Position. If Position
 527                                 is NULL or points to NULL then the new opcode is
 528                                 inserted at the beginning of the table (if TRUE)
 529                                 or end of the table (if FALSE).
 530   @param  Position              On entry, specifies the position in the boot script
 531                                 table where the opcode will be inserted, either
 532                                 before or after, depending on BeforeOrAfter. On
 533                                 exit, specifies the position of the inserted opcode
 534                                 in the boot script table.
 535
 536   @retval RETURN_OUT_OF_RESOURCES  The table is not available.
 537   @retval RETURN_INVALID_PARAMETER The Position is not a valid position in the
 538                                    boot script table.
 539   @retval RETURN_SUCCESS           The opcode was inserted.
 540   @note   The FRAMEWORK version implementation does not support this API.
 541 **/
 542 RETURN_STATUS
 543 EFIAPI
 544 S3BootScriptMoveLastOpcode (
 545   IN     BOOLEAN                        BeforeOrAfter,
 546   IN OUT VOID                         **Position OPTIONAL
 547   );
 548 /**
 549   Find a label within the boot script table and, if not present, optionally create it.
 550
 551   @param  BeforeOrAfter         Specifies whether the opcode is stored before (TRUE)
 552                                 or after (FALSE) the position in the boot script table
 553                                 specified by Position.
 554   @param  CreateIfNotFound      Specifies whether the label will be created if the
 555                                 label does not exists (TRUE) or not (FALSE).
 556   @param  Position              On entry, specifies the position in the boot script
 557                                 table where the opcode will be inserted, either
 558                                 before or after, depending on BeforeOrAfter. On exit,
 559                                 specifies the positionof the inserted opcode in
 560                                 the boot script table.
 561   @param  Label                 Points to the label which will be inserted in the
 562                                 boot script table.
 563   @retval EFI_SUCCESS           The operation succeeded. A record was added into
 564                                 the specified script table.
 565   @retval EFI_INVALID_PARAMETER The parameter is illegal or the given boot script
 566                                 is not supported. If the opcode is unknow or not
 567                                 supported because of the PCD Feature Flags.
 568   @retval EFI_OUT_OF_RESOURCES  There is insufficient memory to store the boot script.
 569   @note   The FRAMEWORK version implementation does not support this API
 570
 571 **/
 572 RETURN_STATUS
 573 EFIAPI
 574 S3BootScriptLabel (
 575   IN       BOOLEAN                      BeforeOrAfter,
 576   IN       BOOLEAN                      CreateIfNotFound,
 577   IN OUT   VOID                       **Position OPTIONAL,
 578   IN CONST CHAR8                       *Label
 579   );
 580 /**
 581   Compare two positions in the boot script table and return their relative position.
 582   @param  Position1             The positions in the boot script table to compare
 583   @param  Position2             The positions in the boot script table to compare
 584   @param  RelativePosition      On return, points to the result of the comparison
 585
 586   @retval EFI_SUCCESS           The operation succeeded. A record was added into the
 587                                 specified script table.
 588   @retval EFI_INVALID_PARAMETER The parameter is illegal or the given boot script
 589                                 is not supported. If the opcode is unknow or not s
 590                                 upported because of the PCD Feature Flags.
 591   @retval EFI_OUT_OF_RESOURCES  There is insufficient memory to store the boot script.
 592   @note   The FRAMEWORK version implementation does not support this API
 593 **/
 594 RETURN_STATUS
 595 EFIAPI
 596 S3BootScriptCompare (
 597   IN  UINT8                       *Position1,
 598   IN  UINT8                       *Position2,
 599   OUT UINTN                       *RelativePosition
 600   );
 601
 602 #endif