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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 | /* * Copyright (c) 2000-2003 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* * Copyright (c) 1999 Apple Computer, Inc. All rights reserved. * * HISTORY * */ #ifndef _OS_OSBYTEORDER_H #define _OS_OSBYTEORDER_H #include <stdint.h> #if defined(__GNUC__) && defined(__ppc__) #include <libkern/ppc/OSByteOrder.h> #elif defined(__GNUC__) && defined(__i386__) #include <libkern/i386/OSByteOrder.h> #else #include <libkern/machine/OSByteOrder.h> #endif enum { OSUnknownByteOrder, OSLittleEndian, OSBigEndian }; OS_INLINE int32_t OSHostByteOrder(void) { #if defined(__LITTLE_ENDIAN__) return OSLittleEndian; #elif defined(__BIG_ENDIAN__) return OSBigEndian; #else return OSUnknownByteOrder; #endif } /* Macros for swapping constant values in the preprocessing stage. */ #define OSSwapConstInt16(x) ((((uint16_t)(x) & 0xff00) >> 8) | \ (((uint16_t)(x) & 0x00ff) << 8)) #define OSSwapConstInt32(x) ((((uint32_t)(x) & 0xff000000) >> 24) | \ (((uint32_t)(x) & 0x00ff0000) >> 8) | \ (((uint32_t)(x) & 0x0000ff00) << 8) | \ (((uint32_t)(x) & 0x000000ff) << 24)) #define OSSwapConstInt64(x) ((((uint64_t)(x) & 0xff00000000000000ULL) >> 56) | \ (((uint64_t)(x) & 0x00ff000000000000ULL) >> 40) | \ (((uint64_t)(x) & 0x0000ff0000000000ULL) >> 24) | \ (((uint64_t)(x) & 0x000000ff00000000ULL) >> 8) | \ (((uint64_t)(x) & 0x00000000ff000000ULL) << 8) | \ (((uint64_t)(x) & 0x0000000000ff0000ULL) << 24) | \ (((uint64_t)(x) & 0x000000000000ff00ULL) << 40) | \ (((uint64_t)(x) & 0x00000000000000ffULL) << 56)) #if !defined(__GNUC__) #define __builtin_constant_p(x) (0) #endif #define OSSwapInt16(x) \ (__builtin_constant_p(x) ? OSSwapConstInt16(x) : _OSSwapInt16(x)) #define OSSwapInt32(x) \ (__builtin_constant_p(x) ? OSSwapConstInt32(x) : _OSSwapInt32(x)) #define OSSwapInt64(x) \ (__builtin_constant_p(x) ? OSSwapConstInt64(x) : _OSSwapInt64(x)) #define OSReadBigInt(x, y) OSReadBigInt32(x, y) #define OSWriteBigInt(x, y, z) OSWriteBigInt32(x, y, z) #define OSSwapBigToHostInt(x) OSSwapBigToHostInt32(x) #define OSSwapHostToBigInt(x) OSSwapHostToBigInt32(x) #define OSReadLittleInt(x, y) OSReadLittleInt32(x, y) #define OSWriteLittleInt(x, y, z) OSWriteLittleInt32(x, y, z) #define OSSwapHostToLittleInt(x) OSSwapHostToLittleInt32(x) #define OSSwapLittleToHostInt(x) OSSwapLittleToHostInt32(x) #if defined(__BIG_ENDIAN__) /* Functions for loading big endian to host endianess. */ OS_INLINE uint16_t OSReadBigInt16( volatile void * base, uintptr_t offset ) { return *(volatile uint16_t *)((int8_t *)base + offset); } OS_INLINE uint32_t OSReadBigInt32( volatile void * base, uintptr_t offset ) { return *(volatile uint32_t *)((uintptr_t)base + offset); } OS_INLINE uint64_t OSReadBigInt64( volatile void * base, uintptr_t offset ) { return *(volatile uint64_t *)((uintptr_t)base + offset); } /* Functions for storing host endianess to big endian. */ OS_INLINE void OSWriteBigInt16( volatile void * base, uintptr_t offset, uint16_t data ) { *(volatile uint16_t *)((uintptr_t)base + offset) = data; } OS_INLINE void OSWriteBigInt32( volatile void * base, uintptr_t offset, uint32_t data ) { *(volatile uint32_t *)((uintptr_t)base + offset) = data; } OS_INLINE void OSWriteBigInt64( volatile void * base, uintptr_t offset, uint64_t data ) { *(volatile uint64_t *)((uintptr_t)base + offset) = data; } /* Functions for loading little endian to host endianess. */ OS_INLINE uint16_t OSReadLittleInt16( volatile void * base, uintptr_t offset ) { return OSReadSwapInt16(base, offset); } OS_INLINE uint32_t OSReadLittleInt32( volatile void * base, uintptr_t offset ) { return OSReadSwapInt32(base, offset); } OS_INLINE uint64_t OSReadLittleInt64( volatile void * base, uintptr_t offset ) { return OSReadSwapInt64(base, offset); } /* Functions for storing host endianess to little endian. */ OS_INLINE void OSWriteLittleInt16( volatile void * base, uintptr_t offset, uint16_t data ) { OSWriteSwapInt16(base, offset, data); } OS_INLINE void OSWriteLittleInt32( volatile void * base, uintptr_t offset, uint32_t data ) { OSWriteSwapInt32(base, offset, data); } OS_INLINE void OSWriteLittleInt64( volatile void * base, uintptr_t offset, uint64_t data ) { OSWriteSwapInt64(base, offset, data); } /* Host endianess to big endian byte swapping macros for constants. */ #define OSSwapHostToBigConstInt16(x) (x) #define OSSwapHostToBigConstInt32(x) (x) #define OSSwapHostToBigConstInt64(x) (x) /* Generic host endianess to big endian byte swapping functions. */ OS_INLINE uint16_t OSSwapHostToBigInt16( uint16_t data ) { return data; } OS_INLINE uint32_t OSSwapHostToBigInt32( uint32_t data ) { return data; } OS_INLINE uint64_t OSSwapHostToBigInt64( uint64_t data ) { return data; } /* Host endianess to little endian byte swapping macros for constants. */ #define OSSwapHostToLittleConstInt16(x) OSSwapConstInt16(x) #define OSSwapHostToLittleConstInt32(x) OSSwapConstInt32(x) #define OSSwapHostToLittleConstInt64(x) OSSwapConstInt64(x) /* Generic host endianess to little endian byte swapping functions. */ #define OSSwapHostToLittleInt16(x) OSSwapInt16(x) #define OSSwapHostToLittleInt32(x) OSSwapInt32(x) #define OSSwapHostToLittleInt64(x) OSSwapInt64(x) /* Big endian to host endianess byte swapping macros for constants. */ #define OSSwapBigToHostConstInt16(x) (x) #define OSSwapBigToHostConstInt32(x) (x) #define OSSwapBigToHostConstInt64(x) (x) /* Generic big endian to host endianess byte swapping functions. */ OS_INLINE uint16_t OSSwapBigToHostInt16( uint16_t data ) { return data; } OS_INLINE uint32_t OSSwapBigToHostInt32( uint32_t data ) { return data; } OS_INLINE uint64_t OSSwapBigToHostInt64( uint64_t data ) { return data; } /* Little endian to host endianess byte swapping macros for constants. */ #define OSSwapLittleToHostConstInt16(x) OSSwapConstInt16(x) #define OSSwapLittleToHostConstInt32(x) OSSwapConstInt32(x) #define OSSwapLittleToHostConstInt64(x) OSSwapConstInt64(x) /* Generic little endian to host endianess byte swapping functions. */ #define OSSwapLittleToHostInt16(x) OSSwapInt16(x) #define OSSwapLittleToHostInt32(x) OSSwapInt32(x) #define OSSwapLittleToHostInt64(x) OSSwapInt64(x) #elif defined(__LITTLE_ENDIAN__) /* Functions for loading big endian to host endianess. */ OS_INLINE uint16_t OSReadBigInt16( volatile void * base, uintptr_t offset ) { return OSReadSwapInt16(base, offset); } OS_INLINE uint32_t OSReadBigInt32( volatile void * base, uintptr_t offset ) { return OSReadSwapInt32(base, offset); } OS_INLINE uint64_t OSReadBigInt64( volatile void * base, uintptr_t offset ) { return OSReadSwapInt64(base, offset); } /* Functions for storing host endianess to big endian. */ OS_INLINE void OSWriteBigInt16( volatile void * base, uintptr_t offset, uint16_t data ) { OSWriteSwapInt16(base, offset, data); } OS_INLINE void OSWriteBigInt32( volatile void * base, uintptr_t offset, uint32_t data ) { OSWriteSwapInt32(base, offset, data); } OS_INLINE void OSWriteBigInt64( volatile void * base, uintptr_t offset, uint64_t data ) { OSWriteSwapInt64(base, offset, data); } /* Functions for loading little endian to host endianess. */ OS_INLINE uint16_t OSReadLittleInt16( volatile void * base, uintptr_t offset ) { return *(volatile uint16_t *)((uintptr_t)base + offset); } OS_INLINE uint32_t OSReadLittleInt32( volatile void * base, uintptr_t offset ) { return *(volatile uint32_t *)((uintptr_t)base + offset); } OS_INLINE uint64_t OSReadLittleInt64( volatile void * base, uintptr_t offset ) { return *(volatile uint64_t *)((uintptr_t)base + offset); } /* Functions for storing host endianess to little endian. */ OS_INLINE void OSWriteLittleInt16( volatile void * base, uintptr_t offset, uint16_t data ) { *(volatile uint16_t *)((uintptr_t)base + offset) = data; } OS_INLINE void OSWriteLittleInt32( volatile void * base, uintptr_t offset, uint32_t data ) { *(volatile uint32_t *)((uintptr_t)base + offset) = data; } OS_INLINE void OSWriteLittleInt64( volatile void * base, uintptr_t offset, uint64_t data ) { *(volatile uint64_t *)((uintptr_t)base + offset) = data; } /* Host endianess to big endian byte swapping macros for constants. */ #define OSSwapHostToBigConstInt16(x) OSSwapConstInt16(x) #define OSSwapHostToBigConstInt32(x) OSSwapConstInt32(x) #define OSSwapHostToBigConstInt64(x) OSSwapConstInt64(x) /* Generic host endianess to big endian byte swapping functions. */ #define OSSwapHostToBigInt16(x) OSSwapInt16(x) #define OSSwapHostToBigInt32(x) OSSwapInt32(x) #define OSSwapHostToBigInt64(x) OSSwapInt64(x) /* Host endianess to little endian byte swapping macros for constants. */ #define OSSwapHostToLittleConstInt16(x) (x) #define OSSwapHostToLittleConstInt32(x) (x) #define OSSwapHostToLittleConstInt64(x) (x) /* Generic host endianess to little endian byte swapping functions. */ OS_INLINE uint16_t OSSwapHostToLittleInt16( uint16_t data ) { return data; } OS_INLINE uint32_t OSSwapHostToLittleInt32( uint32_t data ) { return data; } OS_INLINE uint64_t OSSwapHostToLittleInt64( uint64_t data ) { return data; } /* Big endian to host endianess byte swapping macros for constants. */ #define OSSwapBigToHostConstInt16(x) OSSwapConstInt16(x) #define OSSwapBigToHostConstInt32(x) OSSwapConstInt32(x) #define OSSwapBigToHostConstInt64(x) OSSwapConstInt64(x) /* Generic big endian to host endianess byte swapping functions. */ #define OSSwapBigToHostInt16(x) OSSwapInt16(x) #define OSSwapBigToHostInt32(x) OSSwapInt32(x) #define OSSwapBigToHostInt64(x) OSSwapInt64(x) /* Little endian to host endianess byte swapping macros for constants. */ #define OSSwapLittleToHostConstInt16(x) (x) #define OSSwapLittleToHostConstInt32(x) (x) #define OSSwapLittleToHostConstInt64(x) (x) /* Generic little endian to host endianess byte swapping functions. */ OS_INLINE uint16_t OSSwapLittleToHostInt16( uint16_t data ) { return data; } OS_INLINE uint32_t OSSwapLittleToHostInt32( uint32_t data ) { return data; } OS_INLINE uint64_t OSSwapLittleToHostInt64( uint64_t data ) { return data; } #else #error Unknown endianess. #endif #endif /* ! _OS_OSBYTEORDER_H */ |