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 - 2016, Intel Corporation. All rights reserved.<BR>
  10 Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
  11 This program and the accompanying materials
  12 are licensed and made available under the terms and conditions of the BSD License
  13 which accompanies this distribution.  The 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
  22 #ifndef __BASE_H__
  23 #define __BASE_H__
  24
  25 //
  26 // Include processor specific binding
  27 //
  28 #include <ProcessorBind.h>
  29
  30 #if defined(_MSC_EXTENSIONS)
  31 //
  32 // Disable warning when last field of data structure is a zero sized array.
  33 //
  34 #pragma warning ( disable : 4200 )
  35 #endif
  36
  37 /**
  38   Verifies the storage size of a given data type.
  39
  40   This macro generates a divide by zero error or a zero size array declaration in
  41   the preprocessor if the size is incorrect.  These are declared as "extern" so
  42   the space for these arrays will not be in the modules.
  43
  44   @param  TYPE  The date type to determine the size of.
  45   @param  Size  The expected size for the TYPE.
  46
  47 **/
  48 #define VERIFY_SIZE_OF(TYPE, Size) extern UINT8 _VerifySizeof##TYPE[(sizeof(TYPE) == (Size)) / (sizeof(TYPE) == (Size))]
  49
  50 //
  51 // Verify that ProcessorBind.h produced UEFI Data Types that are compliant with
  52 // Section 2.3.1 of the UEFI 2.3 Specification.
  53 //
  54 VERIFY_SIZE_OF (BOOLEAN, 1);
  55 VERIFY_SIZE_OF (INT8, 1);
  56 VERIFY_SIZE_OF (UINT8, 1);
  57 VERIFY_SIZE_OF (INT16, 2);
  58 VERIFY_SIZE_OF (UINT16, 2);
  59 VERIFY_SIZE_OF (INT32, 4);
  60 VERIFY_SIZE_OF (UINT32, 4);
  61 VERIFY_SIZE_OF (INT64, 8);
  62 VERIFY_SIZE_OF (UINT64, 8);
  63 VERIFY_SIZE_OF (CHAR8, 1);
  64 VERIFY_SIZE_OF (CHAR16, 2);
  65
  66 //
  67 // The Microsoft* C compiler can removed references to unreferenced data items
  68 //  if the /OPT:REF linker option is used. We defined a macro as this is a
  69 //  a non standard extension
  70 //
  71 #if defined(_MSC_EXTENSIONS) && !defined (MDE_CPU_EBC)
  72   ///
  73   /// Remove global variable from the linked image if there are no references to
  74   /// it after all compiler and linker optimizations have been performed.
  75   ///
  76   ///
  77   #define GLOBAL_REMOVE_IF_UNREFERENCED __declspec(selectany)
  78 #else
  79   ///
  80   /// Remove the global variable from the linked image if there are no references
  81   ///  to it after all compiler and linker optimizations have been performed.
  82   ///
  83   ///
  84   #define GLOBAL_REMOVE_IF_UNREFERENCED
  85 #endif
  86
  87 //
  88 // For symbol name in assembly code, an extra "_" is sometimes necessary
  89 //
  90
  91 ///
  92 /// Private worker functions for ASM_PFX()
  93 ///
  94 #define _CONCATENATE(a, b)  __CONCATENATE(a, b)
  95 #define __CONCATENATE(a, b) a ## b
  96
  97 ///
  98 /// The __USER_LABEL_PREFIX__ macro predefined by GNUC represents the prefix
  99 /// on symbols in assembly language.
 100 ///
 101 #define ASM_PFX(name) _CONCATENATE (__USER_LABEL_PREFIX__, name)
 102
 103 #if __APPLE__
 104   //
 105   // Apple extension that is used by the linker to optimize code size
 106   // with assembly functions. Put at the end of your .S files
 107   //
 108   #define ASM_FUNCTION_REMOVE_IF_UNREFERENCED  .subsections_via_symbols
 109 #else
 110   #define ASM_FUNCTION_REMOVE_IF_UNREFERENCED
 111 #endif
 112
 113 #ifdef __CC_ARM
 114   //
 115   // Older RVCT ARM compilers don't fully support #pragma pack and require __packed
 116   // as a prefix for the structure.
 117   //
 118   #define PACKED  __packed
 119 #else
 120   #define PACKED
 121 #endif
 122
 123 ///
 124 /// 128 bit buffer containing a unique identifier value.
 125 /// Unless otherwise specified, aligned on a 64 bit boundary.
 126 ///
 127 typedef struct {
 128   UINT32  Data1;
 129   UINT16  Data2;
 130   UINT16  Data3;
 131   UINT8   Data4[8];
 132 } GUID;
 133
 134 //
 135 // 8-bytes unsigned value that represents a physical system address.
 136 //
 137 typedef UINT64 PHYSICAL_ADDRESS;
 138
 139 ///
 140 /// LIST_ENTRY structure definition.
 141 ///
 142 typedef struct _LIST_ENTRY LIST_ENTRY;
 143
 144 ///
 145 /// _LIST_ENTRY structure definition.
 146 ///
 147 struct _LIST_ENTRY {
 148   LIST_ENTRY  *ForwardLink;
 149   LIST_ENTRY  *BackLink;
 150 };
 151
 152 //
 153 // Modifiers to abstract standard types to aid in debug of problems
 154 //
 155
 156 ///
 157 /// Datum is read-only.
 158 ///
 159 #define CONST     const
 160
 161 ///
 162 /// Datum is scoped to the current file or function.
 163 ///
 164 #define STATIC    static
 165
 166 ///
 167 /// Undeclared type.
 168 ///
 169 #define VOID      void
 170
 171 //
 172 // Modifiers for Data Types used to self document code.
 173 // This concept is borrowed for UEFI specification.
 174 //
 175
 176 ///
 177 /// Datum is passed to the function.
 178 ///
 179 #define IN
 180
 181 ///
 182 /// Datum is returned from the function.
 183 ///
 184 #define OUT
 185
 186 ///
 187 /// Passing the datum to the function is optional, and a NULL
 188 /// is passed if the value is not supplied.
 189 ///
 190 #define OPTIONAL
 191
 192 //
 193 //  UEFI specification claims 1 and 0. We are concerned about the
 194 //  complier portability so we did it this way.
 195 //
 196
 197 ///
 198 /// Boolean true value.  UEFI Specification defines this value to be 1,
 199 /// but this form is more portable.
 200 ///
 201 #define TRUE  ((BOOLEAN)(1==1))
 202
 203 ///
 204 /// Boolean false value.  UEFI Specification defines this value to be 0,
 205 /// but this form is more portable.
 206 ///
 207 #define FALSE ((BOOLEAN)(0==1))
 208
 209 ///
 210 /// NULL pointer (VOID *)
 211 ///
 212 #define NULL  ((VOID *) 0)
 213
 214 ///
 215 /// Maximum values for common UEFI Data Types
 216 ///
 217 #define MAX_INT8    ((INT8)0x7F)
 218 #define MAX_UINT8   ((UINT8)0xFF)
 219 #define MAX_INT16   ((INT16)0x7FFF)
 220 #define MAX_UINT16  ((UINT16)0xFFFF)
 221 #define MAX_INT32   ((INT32)0x7FFFFFFF)
 222 #define MAX_UINT32  ((UINT32)0xFFFFFFFF)
 223 #define MAX_INT64   ((INT64)0x7FFFFFFFFFFFFFFFULL)
 224 #define MAX_UINT64  ((UINT64)0xFFFFFFFFFFFFFFFFULL)
 225
 226 #define  BIT0     0x00000001
 227 #define  BIT1     0x00000002
 228 #define  BIT2     0x00000004
 229 #define  BIT3     0x00000008
 230 #define  BIT4     0x00000010
 231 #define  BIT5     0x00000020
 232 #define  BIT6     0x00000040
 233 #define  BIT7     0x00000080
 234 #define  BIT8     0x00000100
 235 #define  BIT9     0x00000200
 236 #define  BIT10    0x00000400
 237 #define  BIT11    0x00000800
 238 #define  BIT12    0x00001000
 239 #define  BIT13    0x00002000
 240 #define  BIT14    0x00004000
 241 #define  BIT15    0x00008000
 242 #define  BIT16    0x00010000
 243 #define  BIT17    0x00020000
 244 #define  BIT18    0x00040000
 245 #define  BIT19    0x00080000
 246 #define  BIT20    0x00100000
 247 #define  BIT21    0x00200000
 248 #define  BIT22    0x00400000
 249 #define  BIT23    0x00800000
 250 #define  BIT24    0x01000000
 251 #define  BIT25    0x02000000
 252 #define  BIT26    0x04000000
 253 #define  BIT27    0x08000000
 254 #define  BIT28    0x10000000
 255 #define  BIT29    0x20000000
 256 #define  BIT30    0x40000000
 257 #define  BIT31    0x80000000
 258 #define  BIT32    0x0000000100000000ULL
 259 #define  BIT33    0x0000000200000000ULL
 260 #define  BIT34    0x0000000400000000ULL
 261 #define  BIT35    0x0000000800000000ULL
 262 #define  BIT36    0x0000001000000000ULL
 263 #define  BIT37    0x0000002000000000ULL
 264 #define  BIT38    0x0000004000000000ULL
 265 #define  BIT39    0x0000008000000000ULL
 266 #define  BIT40    0x0000010000000000ULL
 267 #define  BIT41    0x0000020000000000ULL
 268 #define  BIT42    0x0000040000000000ULL
 269 #define  BIT43    0x0000080000000000ULL
 270 #define  BIT44    0x0000100000000000ULL
 271 #define  BIT45    0x0000200000000000ULL
 272 #define  BIT46    0x0000400000000000ULL
 273 #define  BIT47    0x0000800000000000ULL
 274 #define  BIT48    0x0001000000000000ULL
 275 #define  BIT49    0x0002000000000000ULL
 276 #define  BIT50    0x0004000000000000ULL
 277 #define  BIT51    0x0008000000000000ULL
 278 #define  BIT52    0x0010000000000000ULL
 279 #define  BIT53    0x0020000000000000ULL
 280 #define  BIT54    0x0040000000000000ULL
 281 #define  BIT55    0x0080000000000000ULL
 282 #define  BIT56    0x0100000000000000ULL
 283 #define  BIT57    0x0200000000000000ULL
 284 #define  BIT58    0x0400000000000000ULL
 285 #define  BIT59    0x0800000000000000ULL
 286 #define  BIT60    0x1000000000000000ULL
 287 #define  BIT61    0x2000000000000000ULL
 288 #define  BIT62    0x4000000000000000ULL
 289 #define  BIT63    0x8000000000000000ULL
 290
 291 #define  SIZE_1KB    0x00000400
 292 #define  SIZE_2KB    0x00000800
 293 #define  SIZE_4KB    0x00001000
 294 #define  SIZE_8KB    0x00002000
 295 #define  SIZE_16KB   0x00004000
 296 #define  SIZE_32KB   0x00008000
 297 #define  SIZE_64KB   0x00010000
 298 #define  SIZE_128KB  0x00020000
 299 #define  SIZE_256KB  0x00040000
 300 #define  SIZE_512KB  0x00080000
 301 #define  SIZE_1MB    0x00100000
 302 #define  SIZE_2MB    0x00200000
 303 #define  SIZE_4MB    0x00400000
 304 #define  SIZE_8MB    0x00800000
 305 #define  SIZE_16MB   0x01000000
 306 #define  SIZE_32MB   0x02000000
 307 #define  SIZE_64MB   0x04000000
 308 #define  SIZE_128MB  0x08000000
 309 #define  SIZE_256MB  0x10000000
 310 #define  SIZE_512MB  0x20000000
 311 #define  SIZE_1GB    0x40000000
 312 #define  SIZE_2GB    0x80000000
 313 #define  SIZE_4GB    0x0000000100000000ULL
 314 #define  SIZE_8GB    0x0000000200000000ULL
 315 #define  SIZE_16GB   0x0000000400000000ULL
 316 #define  SIZE_32GB   0x0000000800000000ULL
 317 #define  SIZE_64GB   0x0000001000000000ULL
 318 #define  SIZE_128GB  0x0000002000000000ULL
 319 #define  SIZE_256GB  0x0000004000000000ULL
 320 #define  SIZE_512GB  0x0000008000000000ULL
 321 #define  SIZE_1TB    0x0000010000000000ULL
 322 #define  SIZE_2TB    0x0000020000000000ULL
 323 #define  SIZE_4TB    0x0000040000000000ULL
 324 #define  SIZE_8TB    0x0000080000000000ULL
 325 #define  SIZE_16TB   0x0000100000000000ULL
 326 #define  SIZE_32TB   0x0000200000000000ULL
 327 #define  SIZE_64TB   0x0000400000000000ULL
 328 #define  SIZE_128TB  0x0000800000000000ULL
 329 #define  SIZE_256TB  0x0001000000000000ULL
 330 #define  SIZE_512TB  0x0002000000000000ULL
 331 #define  SIZE_1PB    0x0004000000000000ULL
 332 #define  SIZE_2PB    0x0008000000000000ULL
 333 #define  SIZE_4PB    0x0010000000000000ULL
 334 #define  SIZE_8PB    0x0020000000000000ULL
 335 #define  SIZE_16PB   0x0040000000000000ULL
 336 #define  SIZE_32PB   0x0080000000000000ULL
 337 #define  SIZE_64PB   0x0100000000000000ULL
 338 #define  SIZE_128PB  0x0200000000000000ULL
 339 #define  SIZE_256PB  0x0400000000000000ULL
 340 #define  SIZE_512PB  0x0800000000000000ULL
 341 #define  SIZE_1EB    0x1000000000000000ULL
 342 #define  SIZE_2EB    0x2000000000000000ULL
 343 #define  SIZE_4EB    0x4000000000000000ULL
 344 #define  SIZE_8EB    0x8000000000000000ULL
 345
 346 #define  BASE_1KB    0x00000400
 347 #define  BASE_2KB    0x00000800
 348 #define  BASE_4KB    0x00001000
 349 #define  BASE_8KB    0x00002000
 350 #define  BASE_16KB   0x00004000
 351 #define  BASE_32KB   0x00008000
 352 #define  BASE_64KB   0x00010000
 353 #define  BASE_128KB  0x00020000
 354 #define  BASE_256KB  0x00040000
 355 #define  BASE_512KB  0x00080000
 356 #define  BASE_1MB    0x00100000
 357 #define  BASE_2MB    0x00200000
 358 #define  BASE_4MB    0x00400000
 359 #define  BASE_8MB    0x00800000
 360 #define  BASE_16MB   0x01000000
 361 #define  BASE_32MB   0x02000000
 362 #define  BASE_64MB   0x04000000
 363 #define  BASE_128MB  0x08000000
 364 #define  BASE_256MB  0x10000000
 365 #define  BASE_512MB  0x20000000
 366 #define  BASE_1GB    0x40000000
 367 #define  BASE_2GB    0x80000000
 368 #define  BASE_4GB    0x0000000100000000ULL
 369 #define  BASE_8GB    0x0000000200000000ULL
 370 #define  BASE_16GB   0x0000000400000000ULL
 371 #define  BASE_32GB   0x0000000800000000ULL
 372 #define  BASE_64GB   0x0000001000000000ULL
 373 #define  BASE_128GB  0x0000002000000000ULL
 374 #define  BASE_256GB  0x0000004000000000ULL
 375 #define  BASE_512GB  0x0000008000000000ULL
 376 #define  BASE_1TB    0x0000010000000000ULL
 377 #define  BASE_2TB    0x0000020000000000ULL
 378 #define  BASE_4TB    0x0000040000000000ULL
 379 #define  BASE_8TB    0x0000080000000000ULL
 380 #define  BASE_16TB   0x0000100000000000ULL
 381 #define  BASE_32TB   0x0000200000000000ULL
 382 #define  BASE_64TB   0x0000400000000000ULL
 383 #define  BASE_128TB  0x0000800000000000ULL
 384 #define  BASE_256TB  0x0001000000000000ULL
 385 #define  BASE_512TB  0x0002000000000000ULL
 386 #define  BASE_1PB    0x0004000000000000ULL
 387 #define  BASE_2PB    0x0008000000000000ULL
 388 #define  BASE_4PB    0x0010000000000000ULL
 389 #define  BASE_8PB    0x0020000000000000ULL
 390 #define  BASE_16PB   0x0040000000000000ULL
 391 #define  BASE_32PB   0x0080000000000000ULL
 392 #define  BASE_64PB   0x0100000000000000ULL
 393 #define  BASE_128PB  0x0200000000000000ULL
 394 #define  BASE_256PB  0x0400000000000000ULL
 395 #define  BASE_512PB  0x0800000000000000ULL
 396 #define  BASE_1EB    0x1000000000000000ULL
 397 #define  BASE_2EB    0x2000000000000000ULL
 398 #define  BASE_4EB    0x4000000000000000ULL
 399 #define  BASE_8EB    0x8000000000000000ULL
 400
 401 //
 402 //  Support for variable length argument lists using the ANSI standard.
 403 //
 404 //  Since we are using the ANSI standard we used the standard naming and
 405 //  did not follow the coding convention
 406 //
 407 //  VA_LIST  - typedef for argument list.
 408 //  VA_START (VA_LIST Marker, argument before the ...) - Init Marker for use.
 409 //  VA_END (VA_LIST Marker) - Clear Marker
 410 //  VA_ARG (VA_LIST Marker, var arg size) - Use Marker to get an argument from
 411 //    the ... list. You must know the size and pass it in this macro.
 412 //  VA_COPY (VA_LIST Dest, VA_LIST Start) - Initialize Dest as a copy of Start.
 413 //
 414 //  example:
 415 //
 416 //  UINTN
 417 //  ExampleVarArg (
 418 //    IN UINTN  NumberOfArgs,
 419 //    ...
 420 //    )
 421 //  {
 422 //    VA_LIST Marker;
 423 //    UINTN   Index;
 424 //    UINTN   Result;
 425 //
 426 //    //
 427 //    // Initialize the Marker
 428 //    //
 429 //    VA_START (Marker, NumberOfArgs);
 430 //    for (Index = 0, Result = 0; Index < NumberOfArgs; Index++) {
 431 //      //
 432 //      // The ... list is a series of UINTN values, so average them up.
 433 //      //
 434 //      Result += VA_ARG (Marker, UINTN);
 435 //    }
 436 //
 437 //    VA_END (Marker);
 438 //    return Result
 439 //  }
 440 //
 441
 442 /**
 443   Return the size of argument that has been aligned to sizeof (UINTN).
 444
 445   @param  n    The parameter size to be aligned.
 446
 447   @return The aligned size.
 448 **/
 449 #define _INT_SIZE_OF(n) ((sizeof (n) + sizeof (UINTN) - 1) &~(sizeof (UINTN) - 1))
 450
 451 #if defined(__CC_ARM)
 452 //
 453 // RVCT ARM variable argument list support.
 454 //
 455
 456 ///
 457 /// Variable used to traverse the list of arguments. This type can vary by
 458 /// implementation and could be an array or structure.
 459 ///
 460 #ifdef __APCS_ADSABI
 461   typedef int         *va_list[1];
 462   #define VA_LIST     va_list
 463 #else
 464   typedef struct __va_list { void *__ap; } va_list;
 465   #define VA_LIST                          va_list
 466 #endif
 467
 468 #define VA_START(Marker, Parameter)   __va_start(Marker, Parameter)
 469
 470 #define VA_ARG(Marker, TYPE)          __va_arg(Marker, TYPE)
 471
 472 #define VA_END(Marker)                ((void)0)
 473
 474 // For some ARM RVCT compilers, __va_copy is not defined
 475 #ifndef __va_copy
 476   #define __va_copy(dest, src) ((void)((dest) = (src)))
 477 #endif
 478
 479 #define VA_COPY(Dest, Start)          __va_copy (Dest, Start)
 480
 481 #elif defined(__GNUC__) && !defined(NO_BUILTIN_VA_FUNCS)
 482 //
 483 // Use GCC built-in macros for variable argument lists.
 484 //
 485
 486 ///
 487 /// Variable used to traverse the list of arguments. This type can vary by
 488 /// implementation and could be an array or structure.
 489 ///
 490 typedef __builtin_va_list VA_LIST;
 491
 492 #define VA_START(Marker, Parameter)  __builtin_va_start (Marker, Parameter)
 493
 494 #define VA_ARG(Marker, TYPE)         ((sizeof (TYPE) < sizeof (UINTN)) ? (TYPE)(__builtin_va_arg (Marker, UINTN)) : (TYPE)(__builtin_va_arg (Marker, TYPE)))
 495
 496 #define VA_END(Marker)               __builtin_va_end (Marker)
 497
 498 #define VA_COPY(Dest, Start)         __builtin_va_copy (Dest, Start)
 499
 500 #else
 501 ///
 502 /// Variable used to traverse the list of arguments. This type can vary by
 503 /// implementation and could be an array or structure.
 504 ///
 505 typedef CHAR8 *VA_LIST;
 506
 507 /**
 508   Retrieves a pointer to the beginning of a variable argument list, based on
 509   the name of the parameter that immediately precedes the variable argument list.
 510
 511   This function initializes Marker to point to the beginning of the variable
 512   argument list that immediately follows Parameter.  The method for computing the
 513   pointer to the next argument in the argument list is CPU-specific following the
 514   EFIAPI ABI.
 515
 516   @param   Marker       The VA_LIST used to traverse the list of arguments.
 517   @param   Parameter    The name of the parameter that immediately precedes
 518                         the variable argument list.
 519
 520   @return  A pointer to the beginning of a variable argument list.
 521
 522 **/
 523 #define VA_START(Marker, Parameter) (Marker = (VA_LIST) ((UINTN) & (Parameter) + _INT_SIZE_OF (Parameter)))
 524
 525 /**
 526   Returns an argument of a specified type from a variable argument list and updates
 527   the pointer to the variable argument list to point to the next argument.
 528
 529   This function returns an argument of the type specified by TYPE from the beginning
 530   of the variable argument list specified by Marker.  Marker is then updated to point
 531   to the next argument in the variable argument list.  The method for computing the
 532   pointer to the next argument in the argument list is CPU-specific following the EFIAPI ABI.
 533
 534   @param   Marker   VA_LIST used to traverse the list of arguments.
 535   @param   TYPE     The type of argument to retrieve from the beginning
 536                     of the variable argument list.
 537
 538   @return  An argument of the type specified by TYPE.
 539
 540 **/
 541 #define VA_ARG(Marker, TYPE)   (*(TYPE *) ((Marker += _INT_SIZE_OF (TYPE)) - _INT_SIZE_OF (TYPE)))
 542
 543 /**
 544   Terminates the use of a variable argument list.
 545
 546   This function initializes Marker so it can no longer be used with VA_ARG().
 547   After this macro is used, the only way to access the variable argument list is
 548   by using VA_START() again.
 549
 550   @param   Marker   VA_LIST used to traverse the list of arguments.
 551
 552 **/
 553 #define VA_END(Marker)      (Marker = (VA_LIST) 0)
 554
 555 /**
 556   Initializes a VA_LIST as a copy of an existing VA_LIST.
 557
 558   This macro initializes Dest as a copy of Start, as if the VA_START macro had been applied to Dest
 559   followed by the same sequence of uses of the VA_ARG macro as had previously been used to reach
 560   the present state of Start.
 561
 562   @param   Dest   VA_LIST used to traverse the list of arguments.
 563   @param   Start  VA_LIST used to traverse the list of arguments.
 564
 565 **/
 566 #define VA_COPY(Dest, Start)  ((void)((Dest) = (Start)))
 567
 568 #endif
 569
 570 ///
 571 /// Pointer to the start of a variable argument list stored in a memory buffer. Same as UINT8 *.
 572 ///
 573 typedef UINTN  *BASE_LIST;
 574
 575 /**
 576   Returns the size of a data type in sizeof(UINTN) units rounded up to the nearest UINTN boundary.
 577
 578   @param  TYPE  The date type to determine the size of.
 579
 580   @return The size of TYPE in sizeof (UINTN) units rounded up to the nearest UINTN boundary.
 581 **/
 582 #define _BASE_INT_SIZE_OF(TYPE) ((sizeof (TYPE) + sizeof (UINTN) - 1) / sizeof (UINTN))
 583
 584 /**
 585   Returns an argument of a specified type from a variable argument list and updates
 586   the pointer to the variable argument list to point to the next argument.
 587
 588   This function returns an argument of the type specified by TYPE from the beginning
 589   of the variable argument list specified by Marker.  Marker is then updated to point
 590   to the next argument in the variable argument list.  The method for computing the
 591   pointer to the next argument in the argument list is CPU specific following the EFIAPI ABI.
 592
 593   @param   Marker   The pointer to the beginning of a variable argument list.
 594   @param   TYPE     The type of argument to retrieve from the beginning
 595                     of the variable argument list.
 596
 597   @return  An argument of the type specified by TYPE.
 598
 599 **/
 600 #define BASE_ARG(Marker, TYPE)   (*(TYPE *) ((Marker += _BASE_INT_SIZE_OF (TYPE)) - _BASE_INT_SIZE_OF (TYPE)))
 601
 602 /**
 603   The macro that returns the byte offset of a field in a data structure.
 604
 605   This function returns the offset, in bytes, of field specified by Field from the
 606   beginning of the  data structure specified by TYPE. If TYPE does not contain Field,
 607   the module will not compile.
 608
 609   @param   TYPE     The name of the data structure that contains the field specified by Field.
 610   @param   Field    The name of the field in the data structure.
 611
 612   @return  Offset, in bytes, of field.
 613
 614 **/
 615 #ifdef __GNUC__
 616 #if __GNUC__ >= 4
 617 #define OFFSET_OF(TYPE, Field) ((UINTN) __builtin_offsetof(TYPE, Field))
 618 #endif
 619 #endif
 620
 621 #ifndef OFFSET_OF
 622 #define OFFSET_OF(TYPE, Field) ((UINTN) &(((TYPE *)0)->Field))
 623 #endif
 624
 625 /**
 626   Macro that returns a pointer to the data structure that contains a specified field of
 627   that data structure.  This is a lightweight method to hide information by placing a
 628   public data structure inside a larger private data structure and using a pointer to
 629   the public data structure to retrieve a pointer to the private data structure.
 630
 631   This function computes the offset, in bytes, of field specified by Field from the beginning
 632   of the  data structure specified by TYPE.  This offset is subtracted from Record, and is
 633   used to return a pointer to a data structure of the type specified by TYPE. If the data type
 634   specified by TYPE does not contain the field specified by Field, then the module will not compile.
 635
 636   @param   Record   Pointer to the field specified by Field within a data structure of type TYPE.
 637   @param   TYPE     The name of the data structure type to return.  This data structure must
 638                     contain the field specified by Field.
 639   @param   Field    The name of the field in the data structure specified by TYPE to which Record points.
 640
 641   @return  A pointer to the structure from one of it's elements.
 642
 643 **/
 644 #define BASE_CR(Record, TYPE, Field)  ((TYPE *) ((CHAR8 *) (Record) - (CHAR8 *) &(((TYPE *) 0)->Field)))
 645
 646 /**
 647   Rounds a value up to the next boundary using a specified alignment.
 648
 649   This function rounds Value up to the next boundary using the specified Alignment.
 650   This aligned value is returned.
 651
 652   @param   Value      The value to round up.
 653   @param   Alignment  The alignment boundary used to return the aligned value.
 654
 655   @return  A value up to the next boundary.
 656
 657 **/
 658 #define ALIGN_VALUE(Value, Alignment) ((Value) + (((Alignment) - (Value)) & ((Alignment) - 1)))
 659
 660 /**
 661   Adjust a pointer by adding the minimum offset required for it to be aligned on
 662   a specified alignment boundary.
 663
 664   This function rounds the pointer specified by Pointer to the next alignment boundary
 665   specified by Alignment. The pointer to the aligned address is returned.
 666
 667   @param   Pointer    The pointer to round up.
 668   @param   Alignment  The alignment boundary to use to return an aligned pointer.
 669
 670   @return  Pointer to the aligned address.
 671
 672 **/
 673 #define ALIGN_POINTER(Pointer, Alignment) ((VOID *) (ALIGN_VALUE ((UINTN)(Pointer), (Alignment))))
 674
 675 /**
 676   Rounds a value up to the next natural boundary for the current CPU.
 677   This is 4-bytes for 32-bit CPUs and 8-bytes for 64-bit CPUs.
 678
 679   This function rounds the value specified by Value up to the next natural boundary for the
 680   current CPU. This rounded value is returned.
 681
 682   @param   Value      The value to round up.
 683
 684   @return  Rounded value specified by Value.
 685
 686 **/
 687 #define ALIGN_VARIABLE(Value)  ALIGN_VALUE ((Value), sizeof (UINTN))
 688
 689
 690 /**
 691   Return the maximum of two operands.
 692
 693   This macro returns the maximum of two operand specified by a and b.
 694   Both a and b must be the same numerical types, signed or unsigned.
 695
 696   @param   a        The first operand with any numerical type.
 697   @param   b        The second operand. Can be any numerical type as long as is
 698                     the same type as a.
 699
 700   @return  Maximum of two operands.
 701
 702 **/
 703 #define MAX(a, b)                       \
 704   (((a) > (b)) ? (a) : (b))
 705
 706 /**
 707   Return the minimum of two operands.
 708
 709   This macro returns the minimal of two operand specified by a and b.
 710   Both a and b must be the same numerical types, signed or unsigned.
 711
 712   @param   a        The first operand with any numerical type.
 713   @param   b        The second operand. It should be the same any numerical type with a.
 714
 715   @return  Minimum of two operands.
 716
 717 **/
 718 #define MIN(a, b)                       \
 719   (((a) < (b)) ? (a) : (b))
 720
 721 /**
 722   Return the absolute value of a signed operand.
 723
 724   This macro returns the absolute value of the signed operand specified by a.
 725
 726   @param   a        The signed operand.
 727
 728   @return  The absolute value of the signed operand.
 729
 730 **/
 731 #define ABS(a)                          \
 732   (((a) < 0) ? (-(a)) : (a))
 733
 734 //
 735 // Status codes common to all execution phases
 736 //
 737 typedef UINTN RETURN_STATUS;
 738
 739 /**
 740   Produces a RETURN_STATUS code with the highest bit set.
 741
 742   @param  StatusCode    The status code value to convert into a warning code.
 743                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.
 744
 745   @return The value specified by StatusCode with the highest bit set.
 746
 747 **/
 748 #define ENCODE_ERROR(StatusCode)     ((RETURN_STATUS)(MAX_BIT | (StatusCode)))
 749
 750 /**
 751   Produces a RETURN_STATUS code with the highest bit clear.
 752
 753   @param  StatusCode    The status code value to convert into a warning code.
 754                         StatusCode must be in the range 0x00000000..0x7FFFFFFF.
 755
 756   @return The value specified by StatusCode with the highest bit clear.
 757
 758 **/
 759 #define ENCODE_WARNING(StatusCode)   ((RETURN_STATUS)(StatusCode))
 760
 761 /**
 762   Returns TRUE if a specified RETURN_STATUS code is an error code.
 763
 764   This function returns TRUE if StatusCode has the high bit set.  Otherwise, FALSE is returned.
 765
 766   @param  StatusCode    The status code value to evaluate.
 767
 768   @retval TRUE          The high bit of StatusCode is set.
 769   @retval FALSE         The high bit of StatusCode is clear.
 770
 771 **/
 772 #define RETURN_ERROR(StatusCode)     (((INTN)(RETURN_STATUS)(StatusCode)) < 0)
 773
 774 ///
 775 /// The operation completed successfully.
 776 ///
 777 #define RETURN_SUCCESS               0
 778
 779 ///
 780 /// The image failed to load.
 781 ///
 782 #define RETURN_LOAD_ERROR            ENCODE_ERROR (1)
 783
 784 ///
 785 /// The parameter was incorrect.
 786 ///
 787 #define RETURN_INVALID_PARAMETER     ENCODE_ERROR (2)
 788
 789 ///
 790 /// The operation is not supported.
 791 ///
 792 #define RETURN_UNSUPPORTED           ENCODE_ERROR (3)
 793
 794 ///
 795 /// The buffer was not the proper size for the request.
 796 ///
 797 #define RETURN_BAD_BUFFER_SIZE       ENCODE_ERROR (4)
 798
 799 ///
 800 /// The buffer was not large enough to hold the requested data.
 801 /// The required buffer size is returned in the appropriate
 802 /// parameter when this error occurs.
 803 ///
 804 #define RETURN_BUFFER_TOO_SMALL      ENCODE_ERROR (5)
 805
 806 ///
 807 /// There is no data pending upon return.
 808 ///
 809 #define RETURN_NOT_READY             ENCODE_ERROR (6)
 810
 811 ///
 812 /// The physical device reported an error while attempting the
 813 /// operation.
 814 ///
 815 #define RETURN_DEVICE_ERROR          ENCODE_ERROR (7)
 816
 817 ///
 818 /// The device can not be written to.
 819 ///
 820 #define RETURN_WRITE_PROTECTED       ENCODE_ERROR (8)
 821
 822 ///
 823 /// The resource has run out.
 824 ///
 825 #define RETURN_OUT_OF_RESOURCES      ENCODE_ERROR (9)
 826
 827 ///
 828 /// An inconsistency was detected on the file system causing the
 829 /// operation to fail.
 830 ///
 831 #define RETURN_VOLUME_CORRUPTED      ENCODE_ERROR (10)
 832
 833 ///
 834 /// There is no more space on the file system.
 835 ///
 836 #define RETURN_VOLUME_FULL           ENCODE_ERROR (11)
 837
 838 ///
 839 /// The device does not contain any medium to perform the
 840 /// operation.
 841 ///
 842 #define RETURN_NO_MEDIA              ENCODE_ERROR (12)
 843
 844 ///
 845 /// The medium in the device has changed since the last
 846 /// access.
 847 ///
 848 #define RETURN_MEDIA_CHANGED         ENCODE_ERROR (13)
 849
 850 ///
 851 /// The item was not found.
 852 ///
 853 #define RETURN_NOT_FOUND             ENCODE_ERROR (14)
 854
 855 ///
 856 /// Access was denied.
 857 ///
 858 #define RETURN_ACCESS_DENIED         ENCODE_ERROR (15)
 859
 860 ///
 861 /// The server was not found or did not respond to the request.
 862 ///
 863 #define RETURN_NO_RESPONSE           ENCODE_ERROR (16)
 864
 865 ///
 866 /// A mapping to the device does not exist.
 867 ///
 868 #define RETURN_NO_MAPPING            ENCODE_ERROR (17)
 869
 870 ///
 871 /// A timeout time expired.
 872 ///
 873 #define RETURN_TIMEOUT               ENCODE_ERROR (18)
 874
 875 ///
 876 /// The protocol has not been started.
 877 ///
 878 #define RETURN_NOT_STARTED           ENCODE_ERROR (19)
 879
 880 ///
 881 /// The protocol has already been started.
 882 ///
 883 #define RETURN_ALREADY_STARTED       ENCODE_ERROR (20)
 884
 885 ///
 886 /// The operation was aborted.
 887 ///
 888 #define RETURN_ABORTED               ENCODE_ERROR (21)
 889
 890 ///
 891 /// An ICMP error occurred during the network operation.
 892 ///
 893 #define RETURN_ICMP_ERROR            ENCODE_ERROR (22)
 894
 895 ///
 896 /// A TFTP error occurred during the network operation.
 897 ///
 898 #define RETURN_TFTP_ERROR            ENCODE_ERROR (23)
 899
 900 ///
 901 /// A protocol error occurred during the network operation.
 902 ///
 903 #define RETURN_PROTOCOL_ERROR        ENCODE_ERROR (24)
 904
 905 ///
 906 /// A function encountered an internal version that was
 907 /// incompatible with a version requested by the caller.
 908 ///
 909 #define RETURN_INCOMPATIBLE_VERSION  ENCODE_ERROR (25)
 910
 911 ///
 912 /// The function was not performed due to a security violation.
 913 ///
 914 #define RETURN_SECURITY_VIOLATION    ENCODE_ERROR (26)
 915
 916 ///
 917 /// A CRC error was detected.
 918 ///
 919 #define RETURN_CRC_ERROR             ENCODE_ERROR (27)
 920
 921 ///
 922 /// The beginning or end of media was reached.
 923 ///
 924 #define RETURN_END_OF_MEDIA          ENCODE_ERROR (28)
 925
 926 ///
 927 /// The end of the file was reached.
 928 ///
 929 #define RETURN_END_OF_FILE           ENCODE_ERROR (31)
 930
 931 ///
 932 /// The language specified was invalid.
 933 ///
 934 #define RETURN_INVALID_LANGUAGE      ENCODE_ERROR (32)
 935
 936 ///
 937 /// The security status of the data is unknown or compromised
 938 /// and the data must be updated or replaced to restore a valid
 939 /// security status.
 940 ///
 941 #define RETURN_COMPROMISED_DATA      ENCODE_ERROR (33)
 942
 943 ///
 944 /// A HTTP error occurred during the network operation.
 945 ///
 946 #define RETURN_HTTP_ERROR            ENCODE_ERROR (35)
 947
 948 ///
 949 /// The string contained one or more characters that
 950 /// the device could not render and were skipped.
 951 ///
 952 #define RETURN_WARN_UNKNOWN_GLYPH    ENCODE_WARNING (1)
 953
 954 ///
 955 /// The handle was closed, but the file was not deleted.
 956 ///
 957 #define RETURN_WARN_DELETE_FAILURE   ENCODE_WARNING (2)
 958
 959 ///
 960 /// The handle was closed, but the data to the file was not
 961 /// flushed properly.
 962 ///
 963 #define RETURN_WARN_WRITE_FAILURE    ENCODE_WARNING (3)
 964
 965 ///
 966 /// The resulting buffer was too small, and the data was
 967 /// truncated to the buffer size.
 968 ///
 969 #define RETURN_WARN_BUFFER_TOO_SMALL ENCODE_WARNING (4)
 970
 971 ///
 972 /// The data has not been updated within the timeframe set by
 973 /// local policy for this type of data.
 974 ///
 975 #define RETURN_WARN_STALE_DATA       ENCODE_WARNING (5)
 976
 977 /**
 978   Returns a 16-bit signature built from 2 ASCII characters.
 979
 980   This macro returns a 16-bit value built from the two ASCII characters specified
 981   by A and B.
 982
 983   @param  A    The first ASCII character.
 984   @param  B    The second ASCII character.
 985
 986   @return A 16-bit value built from the two ASCII characters specified by A and B.
 987
 988 **/
 989 #define SIGNATURE_16(A, B)        ((A) | (B << 8))
 990
 991 /**
 992   Returns a 32-bit signature built from 4 ASCII characters.
 993
 994   This macro returns a 32-bit value built from the four ASCII characters specified
 995   by A, B, C, and D.
 996
 997   @param  A    The first ASCII character.
 998   @param  B    The second ASCII character.
 999   @param  C    The third ASCII character.
1000   @param  D    The fourth ASCII character.
1001
1002   @return A 32-bit value built from the two ASCII characters specified by A, B,
1003           C and D.
1004
1005 **/
1006 #define SIGNATURE_32(A, B, C, D)  (SIGNATURE_16 (A, B) | (SIGNATURE_16 (C, D) << 16))
1007
1008 /**
1009   Returns a 64-bit signature built from 8 ASCII characters.
1010
1011   This macro returns a 64-bit value built from the eight ASCII characters specified
1012   by A, B, C, D, E, F, G,and H.
1013
1014   @param  A    The first ASCII character.
1015   @param  B    The second ASCII character.
1016   @param  C    The third ASCII character.
1017   @param  D    The fourth ASCII character.
1018   @param  E    The fifth ASCII character.
1019   @param  F    The sixth ASCII character.
1020   @param  G    The seventh ASCII character.
1021   @param  H    The eighth ASCII character.
1022
1023   @return A 64-bit value built from the two ASCII characters specified by A, B,
1024           C, D, E, F, G and H.
1025
1026 **/
1027 #define SIGNATURE_64(A, B, C, D, E, F, G, H) \
1028     (SIGNATURE_32 (A, B, C, D) | ((UINT64) (SIGNATURE_32 (E, F, G, H)) << 32))
1029
1030 #if defined(_MSC_EXTENSIONS) && !defined (MDE_CPU_EBC)
1031   #pragma intrinsic(_ReturnAddress)
1032   /**
1033     Get the return address of the calling funcation.
1034
1035     Based on intrinsic function _ReturnAddress that provides the address of
1036     the instruction in the calling function that will be executed after
1037     control returns to the caller.
1038
1039     @param L    Return Level.
1040
1041     @return The return address of the calling funcation or 0 if L != 0.
1042
1043   **/
1044   #define RETURN_ADDRESS(L)     ((L == 0) ? _ReturnAddress() : (VOID *) 0)
1045 #elif defined(__GNUC__)
1046   void * __builtin_return_address (unsigned int level);
1047   /**
1048     Get the return address of the calling funcation.
1049
1050     Based on built-in Function __builtin_return_address that returns
1051     the return address of the current function, or of one of its callers.
1052
1053     @param L    Return Level.
1054
1055     @return The return address of the calling funcation.
1056
1057   **/
1058   #define RETURN_ADDRESS(L)     __builtin_return_address (L)
1059 #else
1060   /**
1061     Get the return address of the calling funcation.
1062
1063     @param L    Return Level.
1064
1065     @return 0 as compilers don't support this feature.
1066
1067   **/
1068   #define RETURN_ADDRESS(L)     ((VOID *) 0)
1069 #endif
1070
1071 #endif
1072