MdePkg/Include/Base.h

   1 /** @file
   2   Root include file for Mde Package Base type modules
   3
   4   This is the include file for any module of type base. Base modules only use
   5   types defined via this include file and can be ported easily to any
   6   environment. There are a set of base libraries in the Mde Package that can
   7   be used to implement base modules.
   8
   9 Copyright (c) 2006 - 2008, Intel Corporation<BR>
  10 All rights reserved. This program and the accompanying materials
  11 are licensed and made available under the terms and conditions of the BSD License
  12 which accompanies this distribution.  The full text of the license may be found at
  13 http://opensource.org/licenses/bsd-license.php
  14
  15 THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  16 WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  17
  18 **/
  19
  20
  21 #ifndef __BASE_H__
  22 #define __BASE_H__
  23
  24 //
  25 // Include processor specific binding
  26 //
  27 #include <ProcessorBind.h>
  28
  29 ///
  30 /// 128 bit buffer containing a unique identifier value.
  31 /// Unless otherwise specified, aligned on a 64 bit boundary.
  32 ///
  33 typedef struct {
  34   UINT32  Data1;
  35   UINT16  Data2;
  36   UINT16  Data3;
  37   UINT8   Data4[8];
  38 } GUID;
  39
  40 //
  41 // 8-bytes unsigned value that represents a physical system address.
  42 //
  43 typedef UINT64 PHYSICAL_ADDRESS;
  44
  45 ///
  46 /// LIST_ENTRY structure definition.
  47 ///
  48 typedef struct _LIST_ENTRY LIST_ENTRY;
  49
  50 ///
  51 /// _LIST_ENTRY structure definition.
  52 ///
  53 struct _LIST_ENTRY {
  54   LIST_ENTRY  *ForwardLink;
  55   LIST_ENTRY  *BackLink;
  56 };
  57
  58 //
  59 // Modifiers to abstract standard types to aid in debug of problems
  60 //
  61
  62 ///
  63 /// Datum is read-only
  64 ///
  65 #define CONST     const
  66
  67 ///
  68 /// Datum is scoped to the current file or function
  69 ///
  70 #define STATIC    static
  71
  72 ///
  73 /// Undeclared type
  74 ///
  75 #define VOID      void
  76
  77 //
  78 // Modifiers for Data Types used to self document code.
  79 // This concept is borrowed for UEFI specification.
  80 //
  81
  82 ///
  83 /// Datum is passed to the function
  84 ///
  85 #define IN
  86
  87 ///
  88 /// Datum is returned from the function
  89 ///
  90 #define OUT
  91
  92 ///
  93 /// Passing the datum to the function is optional, and a NULL
  94 /// be passed if the value is not supplied.
  95 ///
  96 #define OPTIONAL
  97
  98 //
  99 //  UEFI specification claims 1 and 0. We are concerned about the
 100 //  complier portability so we did it this way.
 101 //
 102
 103 ///
 104 /// Boolean true value.  UEFI Specification defines this value to be 1,
 105 /// but this form is more portable.
 106 ///
 107 #define TRUE  ((BOOLEAN)(1==1))
 108
 109 ///
 110 /// Boolean false value.  UEFI Specification defines this value to be 0,
 111 /// but this form is more portable.
 112 ///
 113 #define FALSE ((BOOLEAN)(0==1))
 114
 115 ///
 116 /// NULL pointer (VOID *)
 117 ///
 118 #define NULL  ((VOID *) 0)
 119
 120
 121 #define  BIT0     0x00000001
 122 #define  BIT1     0x00000002
 123 #define  BIT2     0x00000004
 124 #define  BIT3     0x00000008
 125 #define  BIT4     0x00000010
 126 #define  BIT5     0x00000020
 127 #define  BIT6     0x00000040
 128 #define  BIT7     0x00000080
 129 #define  BIT8     0x00000100
 130 #define  BIT9     0x00000200
 131 #define  BIT10    0x00000400
 132 #define  BIT11    0x00000800
 133 #define  BIT12    0x00001000
 134 #define  BIT13    0x00002000
 135 #define  BIT14    0x00004000
 136 #define  BIT15    0x00008000
 137 #define  BIT16    0x00010000
 138 #define  BIT17    0x00020000
 139 #define  BIT18    0x00040000
 140 #define  BIT19    0x00080000
 141 #define  BIT20    0x00100000
 142 #define  BIT21    0x00200000
 143 #define  BIT22    0x00400000
 144 #define  BIT23    0x00800000
 145 #define  BIT24    0x01000000
 146 #define  BIT25    0x02000000
 147 #define  BIT26    0x04000000
 148 #define  BIT27    0x08000000
 149 #define  BIT28    0x10000000
 150 #define  BIT29    0x20000000
 151 #define  BIT30    0x40000000
 152 #define  BIT31    0x80000000
 153 #define  BIT32    0x0000000100000000ULL
 154 #define  BIT33    0x0000000200000000ULL
 155 #define  BIT34    0x0000000400000000ULL
 156 #define  BIT35    0x0000000800000000ULL
 157 #define  BIT36    0x0000001000000000ULL
 158 #define  BIT37    0x0000002000000000ULL
 159 #define  BIT38    0x0000004000000000ULL
 160 #define  BIT39    0x0000008000000000ULL
 161 #define  BIT40    0x0000010000000000ULL
 162 #define  BIT41    0x0000020000000000ULL
 163 #define  BIT42    0x0000040000000000ULL
 164 #define  BIT43    0x0000080000000000ULL
 165 #define  BIT44    0x0000100000000000ULL
 166 #define  BIT45    0x0000200000000000ULL
 167 #define  BIT46    0x0000400000000000ULL
 168 #define  BIT47    0x0000800000000000ULL
 169 #define  BIT48    0x0001000000000000ULL
 170 #define  BIT49    0x0002000000000000ULL
 171 #define  BIT50    0x0004000000000000ULL
 172 #define  BIT51    0x0008000000000000ULL
 173 #define  BIT52    0x0010000000000000ULL
 174 #define  BIT53    0x0020000000000000ULL
 175 #define  BIT54    0x0040000000000000ULL
 176 #define  BIT55    0x0080000000000000ULL
 177 #define  BIT56    0x0100000000000000ULL
 178 #define  BIT57    0x0200000000000000ULL
 179 #define  BIT58    0x0400000000000000ULL
 180 #define  BIT59    0x0800000000000000ULL
 181 #define  BIT60    0x1000000000000000ULL
 182 #define  BIT61    0x2000000000000000ULL
 183 #define  BIT62    0x4000000000000000ULL
 184 #define  BIT63    0x8000000000000000ULL
 185
 186 #define  SIZE_1KB    0x00000400
 187 #define  SIZE_2KB    0x00000800
 188 #define  SIZE_4KB    0x00001000
 189 #define  SIZE_8KB    0x00002000
 190 #define  SIZE_16KB   0x00004000
 191 #define  SIZE_32KB   0x00008000
 192 #define  SIZE_64KB   0x00010000
 193 #define  SIZE_128KB  0x00020000
 194 #define  SIZE_256KB  0x00040000
 195 #define  SIZE_512KB  0x00080000
 196 #define  SIZE_1MB    0x00100000
 197 #define  SIZE_2MB    0x00200000
 198 #define  SIZE_4MB    0x00400000
 199 #define  SIZE_8MB    0x00800000
 200 #define  SIZE_16MB   0x01000000
 201 #define  SIZE_32MB   0x02000000
 202 #define  SIZE_64MB   0x04000000
 203 #define  SIZE_128MB  0x08000000
 204 #define  SIZE_256MB  0x10000000
 205 #define  SIZE_512MB  0x20000000
 206 #define  SIZE_1GB    0x40000000
 207 #define  SIZE_2GB    0x80000000
 208 #define  SIZE_4GB    0x0000000100000000ULL
 209 #define  SIZE_8GB    0x0000000200000000ULL
 210 #define  SIZE_16GB   0x0000000400000000ULL
 211 #define  SIZE_32GB   0x0000000800000000ULL
 212 #define  SIZE_64GB   0x0000001000000000ULL
 213 #define  SIZE_128GB  0x0000002000000000ULL
 214 #define  SIZE_256GB  0x0000004000000000ULL
 215 #define  SIZE_512GB  0x0000008000000000ULL
 216 #define  SIZE_1TB    0x0000010000000000ULL
 217 #define  SIZE_2TB    0x0000020000000000ULL
 218 #define  SIZE_4TB    0x0000040000000000ULL
 219 #define  SIZE_8TB    0x0000080000000000ULL
 220 #define  SIZE_16TB   0x0000100000000000ULL
 221 #define  SIZE_32TB   0x0000200000000000ULL
 222 #define  SIZE_64TB   0x0000400000000000ULL
 223 #define  SIZE_128TB  0x0000800000000000ULL
 224 #define  SIZE_256TB  0x0001000000000000ULL
 225 #define  SIZE_512TB  0x0002000000000000ULL
 226 #define  SIZE_1PB    0x0004000000000000ULL
 227 #define  SIZE_2PB    0x0008000000000000ULL
 228 #define  SIZE_4PB    0x0010000000000000ULL
 229 #define  SIZE_8PB    0x0020000000000000ULL
 230 #define  SIZE_16PB   0x0040000000000000ULL
 231 #define  SIZE_32PB   0x0080000000000000ULL
 232 #define  SIZE_64PB   0x0100000000000000ULL
 233 #define  SIZE_128PB  0x0200000000000000ULL
 234 #define  SIZE_256PB  0x0400000000000000ULL
 235 #define  SIZE_512PB  0x0800000000000000ULL
 236 #define  SIZE_1EB    0x1000000000000000ULL
 237 #define  SIZE_2EB    0x2000000000000000ULL
 238 #define  SIZE_4EB    0x4000000000000000ULL
 239 #define  SIZE_8EB    0x8000000000000000ULL
 240
 241 #define  BASE_1KB    0x00000400
 242 #define  BASE_2KB    0x00000800
 243 #define  BASE_4KB    0x00001000
 244 #define  BASE_8KB    0x00002000
 245 #define  BASE_16KB   0x00004000
 246 #define  BASE_32KB   0x00008000
 247 #define  BASE_64KB   0x00010000
 248 #define  BASE_128KB  0x00020000
 249 #define  BASE_256KB  0x00040000
 250 #define  BASE_512KB  0x00080000
 251 #define  BASE_1MB    0x00100000
 252 #define  BASE_2MB    0x00200000
 253 #define  BASE_4MB    0x00400000
 254 #define  BASE_8MB    0x00800000
 255 #define  BASE_16MB   0x01000000
 256 #define  BASE_32MB   0x02000000
 257 #define  BASE_64MB   0x04000000
 258 #define  BASE_128MB  0x08000000
 259 #define  BASE_256MB  0x10000000
 260 #define  BASE_512MB  0x20000000
 261 #define  BASE_1GB    0x40000000
 262 #define  BASE_2GB    0x80000000
 263 #define  BASE_4GB    0x0000000100000000ULL
 264 #define  BASE_8GB    0x0000000200000000ULL
 265 #define  BASE_16GB   0x0000000400000000ULL
 266 #define  BASE_32GB   0x0000000800000000ULL
 267 #define  BASE_64GB   0x0000001000000000ULL
 268 #define  BASE_128GB  0x0000002000000000ULL
 269 #define  BASE_256GB  0x0000004000000000ULL
 270 #define  BASE_512GB  0x0000008000000000ULL
 271 #define  BASE_1TB    0x0000010000000000ULL
 272 #define  BASE_2TB    0x0000020000000000ULL
 273 #define  BASE_4TB    0x0000040000000000ULL
 274 #define  BASE_8TB    0x0000080000000000ULL
 275 #define  BASE_16TB   0x0000100000000000ULL
 276 #define  BASE_32TB   0x0000200000000000ULL
 277 #define  BASE_64TB   0x0000400000000000ULL
 278 #define  BASE_128TB  0x0000800000000000ULL
 279 #define  BASE_256TB  0x0001000000000000ULL
 280 #define  BASE_512TB  0x0002000000000000ULL
 281 #define  BASE_1PB    0x0004000000000000ULL
 282 #define  BASE_2PB    0x0008000000000000ULL
 283 #define  BASE_4PB    0x0010000000000000ULL
 284 #define  BASE_8PB    0x0020000000000000ULL
 285 #define  BASE_16PB   0x0040000000000000ULL
 286 #define  BASE_32PB   0x0080000000000000ULL
 287 #define  BASE_64PB   0x0100000000000000ULL
 288 #define  BASE_128PB  0x0200000000000000ULL
 289 #define  BASE_256PB  0x0400000000000000ULL
 290 #define  BASE_512PB  0x0800000000000000ULL
 291 #define  BASE_1EB    0x1000000000000000ULL
 292 #define  BASE_2EB    0x2000000000000000ULL
 293 #define  BASE_4EB    0x4000000000000000ULL
 294 #define  BASE_8EB    0x8000000000000000ULL
 295
 296 //
 297 //  Support for variable length argument lists using the ANSI standard.
 298 //
 299 //  Since we are using the ANSI standard we used the standard naming and
 300 //  did not follow the coding convention
 301 //
 302 //  VA_LIST  - typedef for argument list.
 303 //  VA_START (VA_LIST Marker, argument before the ...) - Init Marker for use.
 304 //  VA_END (VA_LIST Marker) - Clear Marker
 305 //  VA_ARG (VA_LIST Marker, var arg size) - Use Marker to get an argument from
 306 //    the ... list. You must know the size and pass it in this macro.
 307 //
 308 //  example:
 309 //
 310 //  UINTN
 311 //  ExampleVarArg (
 312 //    IN UINTN  NumberOfArgs,
 313 //    ...
 314 //    )
 315 //  {
 316 //    VA_LIST Marker;
 317 //    UINTN   Index;
 318 //    UINTN   Result;
 319 //
 320 //    //
 321 //    // Initialize the Marker
 322 //    //
 323 //    VA_START (Marker, NumberOfArgs);
 324 //    for (Index = 0, Result = 0; Index < NumberOfArgs; Index++) {
 325 //      //
 326 //      // The ... list is a series of UINTN values, so average them up.
 327 //      //
 328 //      Result += VA_ARG (Marker, UINTN);
 329 //    }
 330 //
 331 //    VA_END (Marker);
 332 //    return Result
 333 //  }
 334 //
 335
 336 /**
 337   Return the size of argument that has been aligned to sizeof (UINTN).
 338
 339   @param  n    The parameter size is to be aligned.
 340
 341   @return The aligned size
 342 **/
 343 #define _INT_SIZE_OF(n) ((sizeof (n) + sizeof (UINTN) - 1) &~(sizeof (UINTN) - 1))
 344
 345 ///
 346 /// Pointer to the start of a variable argument list. Same as CHAR8 *.
 347 ///
 348 typedef CHAR8 *VA_LIST;
 349
 350 /**
 351   Retrieves a pointer to the beginning of a variable argument list based on
 352   the name of the parameter that immediately precedes the variable argument list.
 353
 354   This function initializes Marker to point to the beginning of the variable argument
 355   list that immediately follows Parameter.  The method for computing the pointer to the
 356   next argument in the argument list is CPU specific following the EFIAPI ABI.
 357
 358   @param   Marker       Pointer to the beginning of the variable argument list.
 359   @param   Parameter    The name of the parameter that immediately precedes
 360                         the variable argument list.
 361
 362   @return  A pointer to the beginning of a variable argument list.
 363
 364 **/
 365 #define VA_START(Marker, Parameter) (Marker = (VA_LIST) & (Parameter) + _INT_SIZE_OF (Parameter))
 366
 367 /**
 368   Returns an argument of a specified type from a variable argument list and updates
 369   the pointer to the variable argument list to point to the next argument.
 370
 371   This function returns an argument of the type specified by TYPE from the beginning
 372   of the variable argument list specified by Marker.  Marker is then updated to point
 373   to the next argument in the variable argument list.  The method for computing the
 374   pointer to the next argument in the argument list is CPU specific following the EFIAPI ABI.
 375
 376   @param   Marker   Pointer to the beginning of a variable argument list.
 377   @param   TYPE     The type of argument to retrieve from the beginning
 378                     of the variable argument list.
 379
 380   @return  An argument of the type specified by TYPE.
 381
 382 **/
 383 #define VA_ARG(Marker, TYPE)   (*(TYPE *) ((Marker += _INT_SIZE_OF (TYPE)) - _INT_SIZE_OF (TYPE)))
 384
 385 /**
 386   Terminates the use of a variable argument list.
 387
 388   This function initializes Marker so it can no longer be used with VA_ARG().
 389   After this macro is used, the only way to access the variable argument list again is
 390   by using VA_START() again.
 391
 392   @param   Marker   The variable to set to the beginning of the variable argument list.
 393
 394 **/
 395 #define VA_END(Marker)      (Marker = (VA_LIST) 0)
 396
 397 /**
 398   Macro that returns the byte offset of a field in a data structure.
 399
 400   This function returns the offset, in bytes, of field specified by Field from the
 401   beginning of the  data structure specified by TYPE. If TYPE does not contain Field,
 402   the module will not compile.
 403
 404   @param   TYPE     The name of the data structure that contains the field specified by Field.
 405   @param   Field    The name of the field in the data structure.
 406
 407   @return  Offset, in bytes, of field.
 408
 409 **/
 410 #define OFFSET_OF(TYPE, Field) ((UINTN) &(((TYPE *)0)->Field))
 411
 412 /**
 413   Macro that returns a pointer to the data structure that contains a specified field of
 414   that data structure.  This is a lightweight method to hide information by placing a
 415   public data structure inside a larger private data structure and using a pointer to
 416   the public data structure to retrieve a pointer to the private data structure.
 417
 418   This function computes the offset, in bytes, of field specified by Field from the beginning
 419   of the  data structure specified by TYPE.  This offset is subtracted from Record, and is
 420   used to return a pointer to a data structure of the type specified by TYPE.If the data type
 421   specified by TYPE does not contain the field specified by Field, then the module will not compile.
 422
 423   @param   Record   Pointer to the field specified by Field within a data structure of type TYPE.
 424   @param   TYPE     The name of the data structure type to return.  This data structure must
 425                     contain the field specified by Field.
 426   @param   Field    The name of the field in the data structure specified by TYPE to which Record points.
 427
 428   @return  A pointer to the structure from one of it's elements.
 429
 430 **/
 431 #define BASE_CR(Record, TYPE, Field)  ((TYPE *) ((CHAR8 *) (Record) - (CHAR8 *) &(((TYPE *) 0)->Field)))
 432
 433 /**
 434   Rounds a value up to the next boundary using a specified alignment.
 435
 436   This function rounds Value up to the next boundary using the specified Alignment.
 437   This aligned value is returned.
 438
 439   @param   Value      The value to round up.
 440   @param   Alignment  The alignment boundary used to return the aligned value.
 441
 442   @return  A value up to the next boundary.
 443
 444 **/
 445 #define ALIGN_VALUE(Value, Alignment) ((Value) + (((Alignment) - (Value)) & ((Alignment) - 1)))
 446
 447 /**
 448   Adjust a pointer by adding the minimum offset required for it to be aligned on
 449   a specified alignment boundary.
 450
 451   This function rounds the pointer specified by Pointer to the next alignment boundary
 452   specified by Alignment. The pointer to the aligned address is returned.
 453
 454   @param   Value      The value to round up.
 455   @param   Alignment  The alignment boundary to use to return an aligned pointer.
 456
 457   @return  Pointer to the aligned address.
 458
 459 **/
 460 #define ALIGN_POINTER(Pointer, Alignment) ((VOID *) (ALIGN_VALUE ((UINTN)(Pointer), (Alignment))))
 461
 462 /**
 463   Rounds a value up to the next natural boundary for the current CPU.
 464   This is 4-bytes for 32-bit CPUs and 8-bytes for 64-bit CPUs.
 465
 466   This function rounds the value specified by Value up to the next natural boundary for the
 467   current CPU. This rounded value is returned.
 468
 469   @param   Value      The value to round up.
 470
 471   @return  Rounded value specified by Value.
 472
 473 **/
 474 #define ALIGN_VARIABLE(Value)  ALIGN_VALUE ((Value), sizeof (UINTN))
 475
 476
 477 /**
 478   Return the maximum of two operands.
 479
 480   This macro returns the maximum of two operand specified by a and b.
 481   Both a and b must be the same numerical types, signed or unsigned.
 482
 483   @param   TYPE     Any numerical data types.
 484   @param   a        The first operand with any numerical type.
 485   @param   b        The second operand. It should be the same any numerical type with a.
 486
 487   @return  Maximum of two operands.
 488
 489 **/
 490 #define MAX(a, b)                       \
 491   (((a) > (b)) ? (a) : (b))
 492
 493 /**
 494   Return the minimum of two operands.
 495
 496   This macro returns the minimal of two operand specified by a and b.
 497   Both a and b must be the same numerical types, signed or unsigned.
 498
 499   @param   TYPE     Any numerical data types.
 500   @param   a        The first operand with any numerical type.
 501   @param   b        The second operand. It should be the same any numerical type with a.
 502
 503   @return  Minimum of two operands.
 504
 505 **/
 506
 507 #define MIN(a, b)                       \
 508   (((a) < (b)) ? (a) : (b))
 509
 510 //
 511 // Status codes common to all execution phases
 512 //
 513 typedef INTN RETURN_STATUS;
 514
 515 /**
 516   Produces a RETURN_STATUS code with the highest bit set.
 517
 518   @param  StatusCode    The status code value to convert into a warning code.
 519                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.
 520
 521   @return The value specified by StatusCode with the highest bit set.
 522
 523 **/
 524 #define ENCODE_ERROR(StatusCode)     ((RETURN_STATUS)(MAX_BIT | (StatusCode)))
 525
 526 /**
 527   Produces a RETURN_STATUS code with the highest bit clear.
 528
 529   @param  StatusCode    The status code value to convert into a warning code.
 530                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.
 531
 532   @return The value specified by StatusCode with the highest bit clear.
 533
 534 **/
 535 #define ENCODE_WARNING(StatusCode)   ((RETURN_STATUS)(StatusCode))
 536
 537 /**
 538   Returns TRUE if a specified RETURN_STATUS code is an error code.
 539
 540   This function returns TRUE if StatusCode has the high bit set.  Otherwise FALSE is returned.
 541
 542   @param  StatusCode    The status code value to evaluate.
 543
 544   @retval TRUE          The high bit of StatusCode is set.
 545   @retval FALSE         The high bit of StatusCode is clear.
 546
 547 **/
 548 #define RETURN_ERROR(StatusCode)     (((RETURN_STATUS)(StatusCode)) < 0)
 549
 550 ///
 551 /// The operation completed successfully.
 552 ///
 553 #define RETURN_SUCCESS               0
 554
 555 ///
 556 /// The image failed to load.
 557 ///
 558 #define RETURN_LOAD_ERROR            ENCODE_ERROR (1)
 559
 560 ///
 561 /// The parameter was incorrect.
 562 ///
 563 #define RETURN_INVALID_PARAMETER     ENCODE_ERROR (2)
 564
 565 ///
 566 /// The operation is not supported.
 567 ///
 568 #define RETURN_UNSUPPORTED           ENCODE_ERROR (3)
 569
 570 ///
 571 /// The buffer was not the proper size for the request.
 572 ///
 573 #define RETURN_BAD_BUFFER_SIZE       ENCODE_ERROR (4)
 574
 575 ///
 576 /// The buffer was not large enough to hold the requested data.
 577 /// The required buffer size is returned in the appropriate
 578 /// parameter when this error occurs.
 579 ///
 580 #define RETURN_BUFFER_TOO_SMALL      ENCODE_ERROR (5)
 581
 582 ///
 583 /// There is no data pending upon return.
 584 ///
 585 #define RETURN_NOT_READY             ENCODE_ERROR (6)
 586
 587 ///
 588 /// The physical device reported an error while attempting the
 589 /// operation.
 590 ///
 591 #define RETURN_DEVICE_ERROR          ENCODE_ERROR (7)
 592
 593 ///
 594 /// The device can not be written to.
 595 ///
 596 #define RETURN_WRITE_PROTECTED       ENCODE_ERROR (8)
 597
 598 ///
 599 /// The resource has run out.
 600 ///
 601 #define RETURN_OUT_OF_RESOURCES      ENCODE_ERROR (9)
 602
 603 ///
 604 /// An inconsistency was detected on the file system causing the
 605 /// operation to fail.
 606 ///
 607 #define RETURN_VOLUME_CORRUPTED      ENCODE_ERROR (10)
 608
 609 ///
 610 /// There is no more space on the file system.
 611 ///
 612 #define RETURN_VOLUME_FULL           ENCODE_ERROR (11)
 613
 614 ///
 615 /// The device does not contain any medium to perform the
 616 /// operation.
 617 ///
 618 #define RETURN_NO_MEDIA              ENCODE_ERROR (12)
 619
 620 ///
 621 /// The medium in the device has changed since the last
 622 /// access.
 623 ///
 624 #define RETURN_MEDIA_CHANGED         ENCODE_ERROR (13)
 625
 626 ///
 627 /// The item was not found.
 628 ///
 629 #define RETURN_NOT_FOUND             ENCODE_ERROR (14)
 630
 631 ///
 632 /// Access was denied.
 633 ///
 634 #define RETURN_ACCESS_DENIED         ENCODE_ERROR (15)
 635
 636 ///
 637 /// The server was not found or did not respond to the request.
 638 ///
 639 #define RETURN_NO_RESPONSE           ENCODE_ERROR (16)
 640
 641 ///
 642 /// A mapping to the device does not exist.
 643 ///
 644 #define RETURN_NO_MAPPING            ENCODE_ERROR (17)
 645
 646 ///
 647 /// A timeout time expired.
 648 ///
 649 #define RETURN_TIMEOUT               ENCODE_ERROR (18)
 650
 651 ///
 652 /// The protocol has not been started.
 653 ///
 654 #define RETURN_NOT_STARTED           ENCODE_ERROR (19)
 655
 656 ///
 657 /// The protocol has already been started.
 658 ///
 659 #define RETURN_ALREADY_STARTED       ENCODE_ERROR (20)
 660
 661 ///
 662 /// The operation was aborted.
 663 ///
 664 #define RETURN_ABORTED               ENCODE_ERROR (21)
 665
 666 ///
 667 /// An ICMP error occurred during the network operation.
 668 ///
 669 #define RETURN_ICMP_ERROR            ENCODE_ERROR (22)
 670
 671 ///
 672 /// A TFTP error occurred during the network operation.
 673 ///
 674 #define RETURN_TFTP_ERROR            ENCODE_ERROR (23)
 675
 676 ///
 677 /// A protocol error occurred during the network operation.
 678 ///
 679 #define RETURN_PROTOCOL_ERROR        ENCODE_ERROR (24)
 680
 681 ///
 682 /// A function encountered an internal version that was
 683 /// incompatible with a version requested by the caller.
 684 ///
 685 #define RETURN_INCOMPATIBLE_VERSION  ENCODE_ERROR (25)
 686
 687 ///
 688 /// The function was not performed due to a security violation.
 689 ///
 690 #define RETURN_SECURITY_VIOLATION    ENCODE_ERROR (26)
 691
 692 ///
 693 /// A CRC error was detected.
 694 ///
 695 #define RETURN_CRC_ERROR             ENCODE_ERROR (27)
 696
 697 ///
 698 /// Beginning or end of media was reached.
 699 ///
 700 #define RETURN_END_OF_MEDIA          ENCODE_ERROR (28)
 701
 702 ///
 703 /// The end of the file was reached.
 704 ///
 705 #define RETURN_END_OF_FILE           ENCODE_ERROR (31)
 706
 707 ///
 708 /// The language specified was invalid.
 709 ///
 710 #define RETURN_INVALID_LANGUAGE      ENCODE_ERROR (32)
 711
 712
 713 ///
 714 /// The Unicode string contained one or more characters that
 715 /// the device could not render and were skipped.
 716 ///
 717 #define RETURN_WARN_UNKNOWN_GLYPH    ENCODE_WARNING (1)
 718
 719 ///
 720 /// The handle was closed, but the file was not deleted.
 721 ///
 722 #define RETURN_WARN_DELETE_FAILURE   ENCODE_WARNING (2)
 723
 724 ///
 725 /// The handle was closed, but the data to the file was not
 726 /// flushed properly.
 727 ///
 728 #define RETURN_WARN_WRITE_FAILURE    ENCODE_WARNING (3)
 729
 730 ///
 731 /// The resulting buffer was too small, and the data was
 732 /// truncated to the buffer size.
 733 ///
 734 #define RETURN_WARN_BUFFER_TOO_SMALL ENCODE_WARNING (4)
 735
 736 /**
 737   Returns a 16-bit signature built from 2 ASCII characters.
 738
 739   This macro returns a 16-bit value built from the two ASCII characters specified
 740   by A and B.
 741
 742   @param  A    The first ASCII character.
 743   @param  B    The second ASCII character.
 744
 745   @return A 16-bit value built from the two ASCII characters specified by A and B.
 746
 747 **/
 748 #define SIGNATURE_16(A, B)        ((A) | (B << 8))
 749
 750 /**
 751   Returns a 32-bit signature built from 4 ASCII characters.
 752
 753   This macro returns a 32-bit value built from the four ASCII characters specified
 754   by A, B, C, and D.
 755
 756   @param  A    The first ASCII character.
 757   @param  B    The second ASCII character.
 758   @param  C    The third ASCII character.
 759   @param  D    The fourth ASCII character.
 760
 761   @return A 32-bit value built from the two ASCII characters specified by A, B,
 762           C and D.
 763
 764 **/
 765 #define SIGNATURE_32(A, B, C, D)  (SIGNATURE_16 (A, B) | (SIGNATURE_16 (C, D) << 16))
 766
 767 /**
 768   Returns a 64-bit signature built from 8 ASCII characters.
 769
 770   This macro returns a 64-bit value built from the eight ASCII characters specified
 771   by A, B, C, D, E, F, G,and H.
 772
 773   @param  A    The first ASCII character.
 774   @param  B    The second ASCII character.
 775   @param  C    The third ASCII character.
 776   @param  D    The fourth ASCII character.
 777   @param  E    The fifth ASCII character.
 778   @param  F    The sixth ASCII character.
 779   @param  G    The seventh ASCII character.
 780   @param  H    The eighth ASCII character.
 781
 782   @return A 64-bit value built from the two ASCII characters specified by A, B,
 783           C, D, E, F, G and H.
 784
 785 **/
 786 #define SIGNATURE_64(A, B, C, D, E, F, G, H) \
 787     (SIGNATURE_32 (A, B, C, D) | ((UINT64) (SIGNATURE_32 (E, F, G, H)) << 32))
 788
 789 #endif
 790