1 /*- 2 * SPDX-License-Identifier: BSD-2-Clause 3 * 4 * Copyright (c) 1998 Doug Rabson 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #ifndef _MACHINE_ATOMIC_H_ 29 #define _MACHINE_ATOMIC_H_ 30 31 #include <sys/atomic_common.h> 32 33 #ifdef _KERNEL 34 #include <machine/md_var.h> 35 #include <machine/specialreg.h> 36 #endif 37 38 #ifndef __OFFSETOF_MONITORBUF 39 /* 40 * __OFFSETOF_MONITORBUF == __pcpu_offset(pc_monitorbuf). 41 * 42 * The open-coded number is used instead of the symbolic expression to 43 * avoid a dependency on sys/pcpu.h in machine/atomic.h consumers. 44 * An assertion in i386/vm_machdep.c ensures that the value is correct. 45 */ 46 #define __OFFSETOF_MONITORBUF 0x80 47 48 static __inline void 49 __mbk(void) 50 { 51 52 __asm __volatile("lock; addl $0,%%fs:%c0" 53 : : "i" (__OFFSETOF_MONITORBUF) : "memory", "cc"); 54 } 55 56 static __inline void 57 __mbu(void) 58 { 59 60 __asm __volatile("lock; addl $0,(%%esp)" : : : "memory", "cc"); 61 } 62 #endif 63 64 /* 65 * Various simple operations on memory, each of which is atomic in the 66 * presence of interrupts and multiple processors. 67 * 68 * atomic_set_char(P, V) (*(u_char *)(P) |= (V)) 69 * atomic_clear_char(P, V) (*(u_char *)(P) &= ~(V)) 70 * atomic_add_char(P, V) (*(u_char *)(P) += (V)) 71 * atomic_subtract_char(P, V) (*(u_char *)(P) -= (V)) 72 * 73 * atomic_set_short(P, V) (*(u_short *)(P) |= (V)) 74 * atomic_clear_short(P, V) (*(u_short *)(P) &= ~(V)) 75 * atomic_add_short(P, V) (*(u_short *)(P) += (V)) 76 * atomic_subtract_short(P, V) (*(u_short *)(P) -= (V)) 77 * 78 * atomic_set_int(P, V) (*(u_int *)(P) |= (V)) 79 * atomic_clear_int(P, V) (*(u_int *)(P) &= ~(V)) 80 * atomic_add_int(P, V) (*(u_int *)(P) += (V)) 81 * atomic_subtract_int(P, V) (*(u_int *)(P) -= (V)) 82 * atomic_swap_int(P, V) (return (*(u_int *)(P)); *(u_int *)(P) = (V);) 83 * atomic_readandclear_int(P) (return (*(u_int *)(P)); *(u_int *)(P) = 0;) 84 * 85 * atomic_set_long(P, V) (*(u_long *)(P) |= (V)) 86 * atomic_clear_long(P, V) (*(u_long *)(P) &= ~(V)) 87 * atomic_add_long(P, V) (*(u_long *)(P) += (V)) 88 * atomic_subtract_long(P, V) (*(u_long *)(P) -= (V)) 89 * atomic_swap_long(P, V) (return (*(u_long *)(P)); *(u_long *)(P) = (V);) 90 * atomic_readandclear_long(P) (return (*(u_long *)(P)); *(u_long *)(P) = 0;) 91 */ 92 93 /* 94 * Always use lock prefixes. The result is slightly less optimal for 95 * UP systems, but it matters less now, and sometimes UP is emulated 96 * over SMP. 97 * 98 * The assembly is volatilized to avoid code chunk removal by the compiler. 99 * GCC aggressively reorders operations and memory clobbering is necessary 100 * in order to avoid that for memory barriers. 101 */ 102 #define ATOMIC_ASM(NAME, TYPE, OP, CONS, V) \ 103 static __inline void \ 104 atomic_##NAME##_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 105 { \ 106 __asm __volatile("lock; " OP \ 107 : "+m" (*p) \ 108 : CONS (V) \ 109 : "cc"); \ 110 } \ 111 \ 112 static __inline void \ 113 atomic_##NAME##_barr_##TYPE(volatile u_##TYPE *p, u_##TYPE v)\ 114 { \ 115 __asm __volatile("lock; " OP \ 116 : "+m" (*p) \ 117 : CONS (V) \ 118 : "memory", "cc"); \ 119 } \ 120 struct __hack 121 122 /* 123 * Atomic compare and set, used by the mutex functions. 124 * 125 * cmpset: 126 * if (*dst == expect) 127 * *dst = src 128 * 129 * fcmpset: 130 * if (*dst == *expect) 131 * *dst = src 132 * else 133 * *expect = *dst 134 * 135 * Returns 0 on failure, non-zero on success. 136 */ 137 #define ATOMIC_CMPSET(TYPE, CONS) \ 138 static __inline int \ 139 atomic_cmpset_##TYPE(volatile u_##TYPE *dst, u_##TYPE expect, u_##TYPE src) \ 140 { \ 141 u_char res; \ 142 \ 143 __asm __volatile( \ 144 " lock; cmpxchg %3,%1 ; " \ 145 " sete %0 ; " \ 146 "# atomic_cmpset_" #TYPE " " \ 147 : "=q" (res), /* 0 */ \ 148 "+m" (*dst), /* 1 */ \ 149 "+a" (expect) /* 2 */ \ 150 : CONS (src) /* 3 */ \ 151 : "memory", "cc"); \ 152 return (res); \ 153 } \ 154 \ 155 static __inline int \ 156 atomic_fcmpset_##TYPE(volatile u_##TYPE *dst, u_##TYPE *expect, u_##TYPE src) \ 157 { \ 158 u_char res; \ 159 \ 160 __asm __volatile( \ 161 " lock; cmpxchg %3,%1 ; " \ 162 " sete %0 ; " \ 163 "# atomic_fcmpset_" #TYPE " " \ 164 : "=q" (res), /* 0 */ \ 165 "+m" (*dst), /* 1 */ \ 166 "+a" (*expect) /* 2 */ \ 167 : CONS (src) /* 3 */ \ 168 : "memory", "cc"); \ 169 return (res); \ 170 } 171 172 ATOMIC_CMPSET(char, "q"); 173 ATOMIC_CMPSET(short, "r"); 174 ATOMIC_CMPSET(int, "r"); 175 176 /* 177 * Atomically add the value of v to the integer pointed to by p and return 178 * the previous value of *p. 179 */ 180 static __inline u_int 181 atomic_fetchadd_int(volatile u_int *p, u_int v) 182 { 183 184 __asm __volatile( 185 " lock; xaddl %0,%1 ; " 186 "# atomic_fetchadd_int" 187 : "+r" (v), /* 0 */ 188 "+m" (*p) /* 1 */ 189 : : "cc"); 190 return (v); 191 } 192 193 static __inline int 194 atomic_testandset_int(volatile u_int *p, u_int v) 195 { 196 u_char res; 197 198 __asm __volatile( 199 " lock; btsl %2,%1 ; " 200 " setc %0 ; " 201 "# atomic_testandset_int" 202 : "=q" (res), /* 0 */ 203 "+m" (*p) /* 1 */ 204 : "Ir" (v & 0x1f) /* 2 */ 205 : "cc"); 206 return (res); 207 } 208 209 static __inline int 210 atomic_testandclear_int(volatile u_int *p, u_int v) 211 { 212 u_char res; 213 214 __asm __volatile( 215 " lock; btrl %2,%1 ; " 216 " setc %0 ; " 217 "# atomic_testandclear_int" 218 : "=q" (res), /* 0 */ 219 "+m" (*p) /* 1 */ 220 : "Ir" (v & 0x1f) /* 2 */ 221 : "cc"); 222 return (res); 223 } 224 225 /* 226 * We assume that a = b will do atomic loads and stores. Due to the 227 * IA32 memory model, a simple store guarantees release semantics. 228 * 229 * However, a load may pass a store if they are performed on distinct 230 * addresses, so we need Store/Load barrier for sequentially 231 * consistent fences in SMP kernels. We use "lock addl $0,mem" for a 232 * Store/Load barrier, as recommended by the AMD Software Optimization 233 * Guide, and not mfence. In the kernel, we use a private per-cpu 234 * cache line for "mem", to avoid introducing false data 235 * dependencies. In user space, we use the word at the top of the 236 * stack. 237 * 238 * For UP kernels, however, the memory of the single processor is 239 * always consistent, so we only need to stop the compiler from 240 * reordering accesses in a way that violates the semantics of acquire 241 * and release. 242 */ 243 244 #if defined(_KERNEL) 245 #define __storeload_barrier() __mbk() 246 #else /* !_KERNEL */ 247 #define __storeload_barrier() __mbu() 248 #endif /* _KERNEL*/ 249 250 #define ATOMIC_LOAD(TYPE) \ 251 static __inline u_##TYPE \ 252 atomic_load_acq_##TYPE(volatile u_##TYPE *p) \ 253 { \ 254 u_##TYPE res; \ 255 \ 256 res = *p; \ 257 __compiler_membar(); \ 258 return (res); \ 259 } \ 260 struct __hack 261 262 #define ATOMIC_STORE(TYPE) \ 263 static __inline void \ 264 atomic_store_rel_##TYPE(volatile u_##TYPE *p, u_##TYPE v) \ 265 { \ 266 \ 267 __compiler_membar(); \ 268 *p = v; \ 269 } \ 270 struct __hack 271 272 static __inline void 273 atomic_thread_fence_acq(void) 274 { 275 276 __compiler_membar(); 277 } 278 279 static __inline void 280 atomic_thread_fence_rel(void) 281 { 282 283 __compiler_membar(); 284 } 285 286 static __inline void 287 atomic_thread_fence_acq_rel(void) 288 { 289 290 __compiler_membar(); 291 } 292 293 static __inline void 294 atomic_thread_fence_seq_cst(void) 295 { 296 297 __storeload_barrier(); 298 } 299 300 #ifdef _KERNEL 301 302 #ifdef WANT_FUNCTIONS 303 int atomic_cmpset_64_i386(volatile uint64_t *, uint64_t, uint64_t); 304 int atomic_cmpset_64_i586(volatile uint64_t *, uint64_t, uint64_t); 305 uint64_t atomic_load_acq_64_i386(volatile uint64_t *); 306 uint64_t atomic_load_acq_64_i586(volatile uint64_t *); 307 void atomic_store_rel_64_i386(volatile uint64_t *, uint64_t); 308 void atomic_store_rel_64_i586(volatile uint64_t *, uint64_t); 309 uint64_t atomic_swap_64_i386(volatile uint64_t *, uint64_t); 310 uint64_t atomic_swap_64_i586(volatile uint64_t *, uint64_t); 311 #endif 312 313 /* I486 does not support SMP or CMPXCHG8B. */ 314 static __inline int 315 atomic_cmpset_64_i386(volatile uint64_t *dst, uint64_t expect, uint64_t src) 316 { 317 volatile uint32_t *p; 318 u_char res; 319 320 p = (volatile uint32_t *)dst; 321 __asm __volatile( 322 " pushfl ; " 323 " cli ; " 324 " xorl %1,%%eax ; " 325 " xorl %2,%%edx ; " 326 " orl %%edx,%%eax ; " 327 " jne 1f ; " 328 " movl %4,%1 ; " 329 " movl %5,%2 ; " 330 "1: " 331 " sete %3 ; " 332 " popfl" 333 : "+A" (expect), /* 0 */ 334 "+m" (*p), /* 1 */ 335 "+m" (*(p + 1)), /* 2 */ 336 "=q" (res) /* 3 */ 337 : "r" ((uint32_t)src), /* 4 */ 338 "r" ((uint32_t)(src >> 32)) /* 5 */ 339 : "memory", "cc"); 340 return (res); 341 } 342 343 static __inline int 344 atomic_fcmpset_64_i386(volatile uint64_t *dst, uint64_t *expect, uint64_t src) 345 { 346 347 if (atomic_cmpset_64_i386(dst, *expect, src)) { 348 return (1); 349 } else { 350 *expect = *dst; 351 return (0); 352 } 353 } 354 355 static __inline uint64_t 356 atomic_load_acq_64_i386(volatile uint64_t *p) 357 { 358 volatile uint32_t *q; 359 uint64_t res; 360 361 q = (volatile uint32_t *)p; 362 __asm __volatile( 363 " pushfl ; " 364 " cli ; " 365 " movl %1,%%eax ; " 366 " movl %2,%%edx ; " 367 " popfl" 368 : "=&A" (res) /* 0 */ 369 : "m" (*q), /* 1 */ 370 "m" (*(q + 1)) /* 2 */ 371 : "memory"); 372 return (res); 373 } 374 375 static __inline void 376 atomic_store_rel_64_i386(volatile uint64_t *p, uint64_t v) 377 { 378 volatile uint32_t *q; 379 380 q = (volatile uint32_t *)p; 381 __asm __volatile( 382 " pushfl ; " 383 " cli ; " 384 " movl %%eax,%0 ; " 385 " movl %%edx,%1 ; " 386 " popfl" 387 : "=m" (*q), /* 0 */ 388 "=m" (*(q + 1)) /* 1 */ 389 : "A" (v) /* 2 */ 390 : "memory"); 391 } 392 393 static __inline uint64_t 394 atomic_swap_64_i386(volatile uint64_t *p, uint64_t v) 395 { 396 volatile uint32_t *q; 397 uint64_t res; 398 399 q = (volatile uint32_t *)p; 400 __asm __volatile( 401 " pushfl ; " 402 " cli ; " 403 " movl %1,%%eax ; " 404 " movl %2,%%edx ; " 405 " movl %4,%2 ; " 406 " movl %3,%1 ; " 407 " popfl" 408 : "=&A" (res), /* 0 */ 409 "+m" (*q), /* 1 */ 410 "+m" (*(q + 1)) /* 2 */ 411 : "r" ((uint32_t)v), /* 3 */ 412 "r" ((uint32_t)(v >> 32))); /* 4 */ 413 return (res); 414 } 415 416 static __inline int 417 atomic_cmpset_64_i586(volatile uint64_t *dst, uint64_t expect, uint64_t src) 418 { 419 u_char res; 420 421 __asm __volatile( 422 " lock; cmpxchg8b %1 ; " 423 " sete %0" 424 : "=q" (res), /* 0 */ 425 "+m" (*dst), /* 1 */ 426 "+A" (expect) /* 2 */ 427 : "b" ((uint32_t)src), /* 3 */ 428 "c" ((uint32_t)(src >> 32)) /* 4 */ 429 : "memory", "cc"); 430 return (res); 431 } 432 433 static __inline int 434 atomic_fcmpset_64_i586(volatile uint64_t *dst, uint64_t *expect, uint64_t src) 435 { 436 u_char res; 437 438 __asm __volatile( 439 " lock; cmpxchg8b %1 ; " 440 " sete %0" 441 : "=q" (res), /* 0 */ 442 "+m" (*dst), /* 1 */ 443 "+A" (*expect) /* 2 */ 444 : "b" ((uint32_t)src), /* 3 */ 445 "c" ((uint32_t)(src >> 32)) /* 4 */ 446 : "memory", "cc"); 447 return (res); 448 } 449 450 static __inline uint64_t 451 atomic_load_acq_64_i586(volatile uint64_t *p) 452 { 453 uint64_t res; 454 455 __asm __volatile( 456 " movl %%ebx,%%eax ; " 457 " movl %%ecx,%%edx ; " 458 " lock; cmpxchg8b %1" 459 : "=&A" (res), /* 0 */ 460 "+m" (*p) /* 1 */ 461 : : "memory", "cc"); 462 return (res); 463 } 464 465 static __inline void 466 atomic_store_rel_64_i586(volatile uint64_t *p, uint64_t v) 467 { 468 469 __asm __volatile( 470 " movl %%eax,%%ebx ; " 471 " movl %%edx,%%ecx ; " 472 "1: " 473 " lock; cmpxchg8b %0 ; " 474 " jne 1b" 475 : "+m" (*p), /* 0 */ 476 "+A" (v) /* 1 */ 477 : : "ebx", "ecx", "memory", "cc"); 478 } 479 480 static __inline uint64_t 481 atomic_swap_64_i586(volatile uint64_t *p, uint64_t v) 482 { 483 484 __asm __volatile( 485 " movl %%eax,%%ebx ; " 486 " movl %%edx,%%ecx ; " 487 "1: " 488 " lock; cmpxchg8b %0 ; " 489 " jne 1b" 490 : "+m" (*p), /* 0 */ 491 "+A" (v) /* 1 */ 492 : : "ebx", "ecx", "memory", "cc"); 493 return (v); 494 } 495 496 static __inline int 497 atomic_cmpset_64(volatile uint64_t *dst, uint64_t expect, uint64_t src) 498 { 499 500 if ((cpu_feature & CPUID_CX8) == 0) 501 return (atomic_cmpset_64_i386(dst, expect, src)); 502 else 503 return (atomic_cmpset_64_i586(dst, expect, src)); 504 } 505 506 static __inline int 507 atomic_fcmpset_64(volatile uint64_t *dst, uint64_t *expect, uint64_t src) 508 { 509 510 if ((cpu_feature & CPUID_CX8) == 0) 511 return (atomic_fcmpset_64_i386(dst, expect, src)); 512 else 513 return (atomic_fcmpset_64_i586(dst, expect, src)); 514 } 515 516 static __inline uint64_t 517 atomic_load_acq_64(volatile uint64_t *p) 518 { 519 520 if ((cpu_feature & CPUID_CX8) == 0) 521 return (atomic_load_acq_64_i386(p)); 522 else 523 return (atomic_load_acq_64_i586(p)); 524 } 525 526 static __inline void 527 atomic_store_rel_64(volatile uint64_t *p, uint64_t v) 528 { 529 530 if ((cpu_feature & CPUID_CX8) == 0) 531 atomic_store_rel_64_i386(p, v); 532 else 533 atomic_store_rel_64_i586(p, v); 534 } 535 536 static __inline uint64_t 537 atomic_swap_64(volatile uint64_t *p, uint64_t v) 538 { 539 540 if ((cpu_feature & CPUID_CX8) == 0) 541 return (atomic_swap_64_i386(p, v)); 542 else 543 return (atomic_swap_64_i586(p, v)); 544 } 545 546 static __inline uint64_t 547 atomic_fetchadd_64(volatile uint64_t *p, uint64_t v) 548 { 549 550 for (;;) { 551 uint64_t t = *p; 552 if (atomic_cmpset_64(p, t, t + v)) 553 return (t); 554 } 555 } 556 557 static __inline void 558 atomic_add_64(volatile uint64_t *p, uint64_t v) 559 { 560 uint64_t t; 561 562 for (;;) { 563 t = *p; 564 if (atomic_cmpset_64(p, t, t + v)) 565 break; 566 } 567 } 568 569 static __inline void 570 atomic_subtract_64(volatile uint64_t *p, uint64_t v) 571 { 572 uint64_t t; 573 574 for (;;) { 575 t = *p; 576 if (atomic_cmpset_64(p, t, t - v)) 577 break; 578 } 579 } 580 581 #endif /* _KERNEL */ 582 583 ATOMIC_ASM(set, char, "orb %b1,%0", "iq", v); 584 ATOMIC_ASM(clear, char, "andb %b1,%0", "iq", ~v); 585 ATOMIC_ASM(add, char, "addb %b1,%0", "iq", v); 586 ATOMIC_ASM(subtract, char, "subb %b1,%0", "iq", v); 587 588 ATOMIC_ASM(set, short, "orw %w1,%0", "ir", v); 589 ATOMIC_ASM(clear, short, "andw %w1,%0", "ir", ~v); 590 ATOMIC_ASM(add, short, "addw %w1,%0", "ir", v); 591 ATOMIC_ASM(subtract, short, "subw %w1,%0", "ir", v); 592 593 ATOMIC_ASM(set, int, "orl %1,%0", "ir", v); 594 ATOMIC_ASM(clear, int, "andl %1,%0", "ir", ~v); 595 ATOMIC_ASM(add, int, "addl %1,%0", "ir", v); 596 ATOMIC_ASM(subtract, int, "subl %1,%0", "ir", v); 597 598 ATOMIC_ASM(set, long, "orl %1,%0", "ir", v); 599 ATOMIC_ASM(clear, long, "andl %1,%0", "ir", ~v); 600 ATOMIC_ASM(add, long, "addl %1,%0", "ir", v); 601 ATOMIC_ASM(subtract, long, "subl %1,%0", "ir", v); 602 603 #define ATOMIC_LOADSTORE(TYPE) \ 604 ATOMIC_LOAD(TYPE); \ 605 ATOMIC_STORE(TYPE) 606 607 ATOMIC_LOADSTORE(char); 608 ATOMIC_LOADSTORE(short); 609 ATOMIC_LOADSTORE(int); 610 ATOMIC_LOADSTORE(long); 611 612 #undef ATOMIC_ASM 613 #undef ATOMIC_LOAD 614 #undef ATOMIC_STORE 615 #undef ATOMIC_LOADSTORE 616 617 #ifndef WANT_FUNCTIONS 618 619 static __inline int 620 atomic_cmpset_long(volatile u_long *dst, u_long expect, u_long src) 621 { 622 623 return (atomic_cmpset_int((volatile u_int *)dst, (u_int)expect, 624 (u_int)src)); 625 } 626 627 static __inline int 628 atomic_fcmpset_long(volatile u_long *dst, u_long *expect, u_long src) 629 { 630 631 return (atomic_fcmpset_int((volatile u_int *)dst, (u_int *)expect, 632 (u_int)src)); 633 } 634 635 static __inline u_long 636 atomic_fetchadd_long(volatile u_long *p, u_long v) 637 { 638 639 return (atomic_fetchadd_int((volatile u_int *)p, (u_int)v)); 640 } 641 642 static __inline int 643 atomic_testandset_long(volatile u_long *p, u_int v) 644 { 645 646 return (atomic_testandset_int((volatile u_int *)p, v)); 647 } 648 649 static __inline int 650 atomic_testandclear_long(volatile u_long *p, u_int v) 651 { 652 653 return (atomic_testandclear_int((volatile u_int *)p, v)); 654 } 655 656 /* Read the current value and store a new value in the destination. */ 657 static __inline u_int 658 atomic_swap_int(volatile u_int *p, u_int v) 659 { 660 661 __asm __volatile( 662 " xchgl %1,%0 ; " 663 "# atomic_swap_int" 664 : "+r" (v), /* 0 */ 665 "+m" (*p)); /* 1 */ 666 return (v); 667 } 668 669 static __inline u_long 670 atomic_swap_long(volatile u_long *p, u_long v) 671 { 672 673 return (atomic_swap_int((volatile u_int *)p, (u_int)v)); 674 } 675 676 #define atomic_set_acq_char atomic_set_barr_char 677 #define atomic_set_rel_char atomic_set_barr_char 678 #define atomic_clear_acq_char atomic_clear_barr_char 679 #define atomic_clear_rel_char atomic_clear_barr_char 680 #define atomic_add_acq_char atomic_add_barr_char 681 #define atomic_add_rel_char atomic_add_barr_char 682 #define atomic_subtract_acq_char atomic_subtract_barr_char 683 #define atomic_subtract_rel_char atomic_subtract_barr_char 684 #define atomic_cmpset_acq_char atomic_cmpset_char 685 #define atomic_cmpset_rel_char atomic_cmpset_char 686 #define atomic_fcmpset_acq_char atomic_fcmpset_char 687 #define atomic_fcmpset_rel_char atomic_fcmpset_char 688 689 #define atomic_set_acq_short atomic_set_barr_short 690 #define atomic_set_rel_short atomic_set_barr_short 691 #define atomic_clear_acq_short atomic_clear_barr_short 692 #define atomic_clear_rel_short atomic_clear_barr_short 693 #define atomic_add_acq_short atomic_add_barr_short 694 #define atomic_add_rel_short atomic_add_barr_short 695 #define atomic_subtract_acq_short atomic_subtract_barr_short 696 #define atomic_subtract_rel_short atomic_subtract_barr_short 697 #define atomic_cmpset_acq_short atomic_cmpset_short 698 #define atomic_cmpset_rel_short atomic_cmpset_short 699 #define atomic_fcmpset_acq_short atomic_fcmpset_short 700 #define atomic_fcmpset_rel_short atomic_fcmpset_short 701 702 #define atomic_set_acq_int atomic_set_barr_int 703 #define atomic_set_rel_int atomic_set_barr_int 704 #define atomic_clear_acq_int atomic_clear_barr_int 705 #define atomic_clear_rel_int atomic_clear_barr_int 706 #define atomic_add_acq_int atomic_add_barr_int 707 #define atomic_add_rel_int atomic_add_barr_int 708 #define atomic_subtract_acq_int atomic_subtract_barr_int 709 #define atomic_subtract_rel_int atomic_subtract_barr_int 710 #define atomic_cmpset_acq_int atomic_cmpset_int 711 #define atomic_cmpset_rel_int atomic_cmpset_int 712 #define atomic_fcmpset_acq_int atomic_fcmpset_int 713 #define atomic_fcmpset_rel_int atomic_fcmpset_int 714 715 #define atomic_set_acq_long atomic_set_barr_long 716 #define atomic_set_rel_long atomic_set_barr_long 717 #define atomic_clear_acq_long atomic_clear_barr_long 718 #define atomic_clear_rel_long atomic_clear_barr_long 719 #define atomic_add_acq_long atomic_add_barr_long 720 #define atomic_add_rel_long atomic_add_barr_long 721 #define atomic_subtract_acq_long atomic_subtract_barr_long 722 #define atomic_subtract_rel_long atomic_subtract_barr_long 723 #define atomic_cmpset_acq_long atomic_cmpset_long 724 #define atomic_cmpset_rel_long atomic_cmpset_long 725 #define atomic_fcmpset_acq_long atomic_fcmpset_long 726 #define atomic_fcmpset_rel_long atomic_fcmpset_long 727 728 #define atomic_readandclear_int(p) atomic_swap_int(p, 0) 729 #define atomic_readandclear_long(p) atomic_swap_long(p, 0) 730 #define atomic_testandset_acq_long atomic_testandset_long 731 732 /* Operations on 8-bit bytes. */ 733 #define atomic_set_8 atomic_set_char 734 #define atomic_set_acq_8 atomic_set_acq_char 735 #define atomic_set_rel_8 atomic_set_rel_char 736 #define atomic_clear_8 atomic_clear_char 737 #define atomic_clear_acq_8 atomic_clear_acq_char 738 #define atomic_clear_rel_8 atomic_clear_rel_char 739 #define atomic_add_8 atomic_add_char 740 #define atomic_add_acq_8 atomic_add_acq_char 741 #define atomic_add_rel_8 atomic_add_rel_char 742 #define atomic_subtract_8 atomic_subtract_char 743 #define atomic_subtract_acq_8 atomic_subtract_acq_char 744 #define atomic_subtract_rel_8 atomic_subtract_rel_char 745 #define atomic_load_acq_8 atomic_load_acq_char 746 #define atomic_store_rel_8 atomic_store_rel_char 747 #define atomic_cmpset_8 atomic_cmpset_char 748 #define atomic_cmpset_acq_8 atomic_cmpset_acq_char 749 #define atomic_cmpset_rel_8 atomic_cmpset_rel_char 750 #define atomic_fcmpset_8 atomic_fcmpset_char 751 #define atomic_fcmpset_acq_8 atomic_fcmpset_acq_char 752 #define atomic_fcmpset_rel_8 atomic_fcmpset_rel_char 753 754 /* Operations on 16-bit words. */ 755 #define atomic_set_16 atomic_set_short 756 #define atomic_set_acq_16 atomic_set_acq_short 757 #define atomic_set_rel_16 atomic_set_rel_short 758 #define atomic_clear_16 atomic_clear_short 759 #define atomic_clear_acq_16 atomic_clear_acq_short 760 #define atomic_clear_rel_16 atomic_clear_rel_short 761 #define atomic_add_16 atomic_add_short 762 #define atomic_add_acq_16 atomic_add_acq_short 763 #define atomic_add_rel_16 atomic_add_rel_short 764 #define atomic_subtract_16 atomic_subtract_short 765 #define atomic_subtract_acq_16 atomic_subtract_acq_short 766 #define atomic_subtract_rel_16 atomic_subtract_rel_short 767 #define atomic_load_acq_16 atomic_load_acq_short 768 #define atomic_store_rel_16 atomic_store_rel_short 769 #define atomic_cmpset_16 atomic_cmpset_short 770 #define atomic_cmpset_acq_16 atomic_cmpset_acq_short 771 #define atomic_cmpset_rel_16 atomic_cmpset_rel_short 772 #define atomic_fcmpset_16 atomic_fcmpset_short 773 #define atomic_fcmpset_acq_16 atomic_fcmpset_acq_short 774 #define atomic_fcmpset_rel_16 atomic_fcmpset_rel_short 775 776 /* Operations on 32-bit double words. */ 777 #define atomic_set_32 atomic_set_int 778 #define atomic_set_acq_32 atomic_set_acq_int 779 #define atomic_set_rel_32 atomic_set_rel_int 780 #define atomic_clear_32 atomic_clear_int 781 #define atomic_clear_acq_32 atomic_clear_acq_int 782 #define atomic_clear_rel_32 atomic_clear_rel_int 783 #define atomic_add_32 atomic_add_int 784 #define atomic_add_acq_32 atomic_add_acq_int 785 #define atomic_add_rel_32 atomic_add_rel_int 786 #define atomic_subtract_32 atomic_subtract_int 787 #define atomic_subtract_acq_32 atomic_subtract_acq_int 788 #define atomic_subtract_rel_32 atomic_subtract_rel_int 789 #define atomic_load_acq_32 atomic_load_acq_int 790 #define atomic_store_rel_32 atomic_store_rel_int 791 #define atomic_cmpset_32 atomic_cmpset_int 792 #define atomic_cmpset_acq_32 atomic_cmpset_acq_int 793 #define atomic_cmpset_rel_32 atomic_cmpset_rel_int 794 #define atomic_fcmpset_32 atomic_fcmpset_int 795 #define atomic_fcmpset_acq_32 atomic_fcmpset_acq_int 796 #define atomic_fcmpset_rel_32 atomic_fcmpset_rel_int 797 #define atomic_swap_32 atomic_swap_int 798 #define atomic_readandclear_32 atomic_readandclear_int 799 #define atomic_fetchadd_32 atomic_fetchadd_int 800 #define atomic_testandset_32 atomic_testandset_int 801 #define atomic_testandclear_32 atomic_testandclear_int 802 803 #ifdef _KERNEL 804 /* Operations on 64-bit quad words. */ 805 #define atomic_cmpset_acq_64 atomic_cmpset_64 806 #define atomic_cmpset_rel_64 atomic_cmpset_64 807 #define atomic_fcmpset_acq_64 atomic_fcmpset_64 808 #define atomic_fcmpset_rel_64 atomic_fcmpset_64 809 #define atomic_fetchadd_acq_64 atomic_fetchadd_64 810 #define atomic_fetchadd_rel_64 atomic_fetchadd_64 811 #define atomic_add_acq_64 atomic_add_64 812 #define atomic_add_rel_64 atomic_add_64 813 #define atomic_subtract_acq_64 atomic_subtract_64 814 #define atomic_subtract_rel_64 atomic_subtract_64 815 #define atomic_load_64 atomic_load_acq_64 816 #define atomic_store_64 atomic_store_rel_64 817 #endif 818 819 /* Operations on pointers. */ 820 #define atomic_set_ptr(p, v) \ 821 atomic_set_int((volatile u_int *)(p), (u_int)(v)) 822 #define atomic_set_acq_ptr(p, v) \ 823 atomic_set_acq_int((volatile u_int *)(p), (u_int)(v)) 824 #define atomic_set_rel_ptr(p, v) \ 825 atomic_set_rel_int((volatile u_int *)(p), (u_int)(v)) 826 #define atomic_clear_ptr(p, v) \ 827 atomic_clear_int((volatile u_int *)(p), (u_int)(v)) 828 #define atomic_clear_acq_ptr(p, v) \ 829 atomic_clear_acq_int((volatile u_int *)(p), (u_int)(v)) 830 #define atomic_clear_rel_ptr(p, v) \ 831 atomic_clear_rel_int((volatile u_int *)(p), (u_int)(v)) 832 #define atomic_add_ptr(p, v) \ 833 atomic_add_int((volatile u_int *)(p), (u_int)(v)) 834 #define atomic_add_acq_ptr(p, v) \ 835 atomic_add_acq_int((volatile u_int *)(p), (u_int)(v)) 836 #define atomic_add_rel_ptr(p, v) \ 837 atomic_add_rel_int((volatile u_int *)(p), (u_int)(v)) 838 #define atomic_subtract_ptr(p, v) \ 839 atomic_subtract_int((volatile u_int *)(p), (u_int)(v)) 840 #define atomic_subtract_acq_ptr(p, v) \ 841 atomic_subtract_acq_int((volatile u_int *)(p), (u_int)(v)) 842 #define atomic_subtract_rel_ptr(p, v) \ 843 atomic_subtract_rel_int((volatile u_int *)(p), (u_int)(v)) 844 #define atomic_load_acq_ptr(p) \ 845 atomic_load_acq_int((volatile u_int *)(p)) 846 #define atomic_store_rel_ptr(p, v) \ 847 atomic_store_rel_int((volatile u_int *)(p), (v)) 848 #define atomic_cmpset_ptr(dst, old, new) \ 849 atomic_cmpset_int((volatile u_int *)(dst), (u_int)(old), (u_int)(new)) 850 #define atomic_cmpset_acq_ptr(dst, old, new) \ 851 atomic_cmpset_acq_int((volatile u_int *)(dst), (u_int)(old), \ 852 (u_int)(new)) 853 #define atomic_cmpset_rel_ptr(dst, old, new) \ 854 atomic_cmpset_rel_int((volatile u_int *)(dst), (u_int)(old), \ 855 (u_int)(new)) 856 #define atomic_fcmpset_ptr(dst, old, new) \ 857 atomic_fcmpset_int((volatile u_int *)(dst), (u_int *)(old), (u_int)(new)) 858 #define atomic_fcmpset_acq_ptr(dst, old, new) \ 859 atomic_fcmpset_acq_int((volatile u_int *)(dst), (u_int *)(old), \ 860 (u_int)(new)) 861 #define atomic_fcmpset_rel_ptr(dst, old, new) \ 862 atomic_fcmpset_rel_int((volatile u_int *)(dst), (u_int *)(old), \ 863 (u_int)(new)) 864 #define atomic_swap_ptr(p, v) \ 865 atomic_swap_int((volatile u_int *)(p), (u_int)(v)) 866 #define atomic_readandclear_ptr(p) \ 867 atomic_readandclear_int((volatile u_int *)(p)) 868 #define atomic_testandclear_ptr(p, val) \ 869 atomic_testandclear_int((volatile u_int *)(p), (val)) 870 #define atomic_testandset_ptr(p, val) \ 871 atomic_testandset_int((volatile u_int *)(p), (val)) 872 873 #endif /* !WANT_FUNCTIONS */ 874 875 #if defined(_KERNEL) 876 #define mb() __mbk() 877 #define wmb() __mbk() 878 #define rmb() __mbk() 879 #else 880 #define mb() __mbu() 881 #define wmb() __mbu() 882 #define rmb() __mbu() 883 #endif 884 885 #endif /* !_MACHINE_ATOMIC_H_ */ 886