atomic.S revision 1.7
1 /* $NetBSD: atomic.S,v 1.7 2007/12/20 23:46:10 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jason R. Thorpe, and by Andrew Doran. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <machine/asm.h> 40 41 #ifdef _KERNEL 42 #define LOCK(n) .Lpatch/**/n: lock 43 #define ALIAS(f, t) STRONG_ALIAS(f,t) 44 #define END(a) _ALIGN_TEXT; LABEL(a) 45 #else 46 #define LOCK(n) lock 47 #define ALIAS(f, t) WEAK_ALIAS(f,t) 48 #define END(a) /* nothing */ 49 #endif 50 51 .text 52 53 NENTRY(_atomic_add_32) 54 movl 4(%esp), %edx 55 movl 8(%esp), %eax 56 LOCK(1) 57 addl %eax, (%edx) 58 ret 59 60 NENTRY(_atomic_add_32_nv) 61 movl 4(%esp), %edx 62 movl 8(%esp), %eax 63 movl %eax, %ecx 64 LOCK(2) 65 xaddl %eax, (%edx) 66 addl %ecx, %eax 67 ret 68 69 NENTRY(_atomic_and_32) 70 movl 4(%esp), %edx 71 movl 8(%esp), %eax 72 LOCK(3) 73 andl %eax, (%edx) 74 ret 75 76 NENTRY(_atomic_and_32_nv) 77 movl 4(%esp), %edx 78 movl (%edx), %eax 79 1: 80 movl %eax, %ecx 81 andl 8(%esp), %ecx 82 LOCK(4) 83 cmpxchgl %ecx, (%edx) 84 jnz 1b 85 movl %ecx, %eax 86 ret 87 88 NENTRY(_atomic_dec_32) 89 movl 4(%esp), %edx 90 LOCK(5) 91 decl (%edx) 92 ret 93 94 NENTRY(_atomic_dec_32_nv) 95 movl 4(%esp), %edx 96 movl $-1, %eax 97 LOCK(6) 98 xaddl %eax, (%edx) 99 decl %eax 100 ret 101 102 NENTRY(_atomic_inc_32) 103 movl 4(%esp), %edx 104 LOCK(7) 105 incl (%edx) 106 ret 107 108 NENTRY(_atomic_inc_32_nv) 109 movl 4(%esp), %edx 110 movl $1, %eax 111 LOCK(8) 112 xaddl %eax, (%edx) 113 incl %eax 114 ret 115 116 NENTRY(_atomic_or_32) 117 movl 4(%esp), %edx 118 movl 8(%esp), %eax 119 LOCK(9) 120 orl %eax, (%edx) 121 ret 122 123 NENTRY(_atomic_or_32_nv) 124 movl 4(%esp), %edx 125 movl (%edx), %eax 126 1: 127 movl %eax, %ecx 128 orl 8(%esp), %ecx 129 LOCK(10) 130 cmpxchgl %ecx, (%edx) 131 jnz 1b 132 movl %ecx, %eax 133 ret 134 135 NENTRY(_atomic_swap_32) 136 movl 4(%esp), %edx 137 movl 8(%esp), %eax 138 xchgl %eax, (%edx) 139 ret 140 141 NENTRY(_atomic_cas_32) 142 movl 4(%esp), %edx 143 movl 8(%esp), %eax 144 movl 12(%esp), %ecx 145 LOCK(12) 146 cmpxchgl %ecx, (%edx) 147 /* %eax now contains the old value */ 148 ret 149 150 NENTRY(_membar_consumer) 151 LOCK(13) 152 addl $0, -4(%esp) 153 ret 154 END(membar_consumer_end) 155 156 NENTRY(_membar_producer) 157 /* A store is enough */ 158 movl $0, -4(%esp) 159 ret 160 END(membar_producer_end) 161 162 NENTRY(_membar_enter) 163 /* A store is enough */ 164 movl $0, -4(%esp) 165 ret 166 END(membar_enter_end) 167 168 NENTRY(_membar_exit) 169 /* A store is enough */ 170 movl $0, -4(%esp) 171 ret 172 END(membar_exit_end) 173 174 NENTRY(_membar_sync) 175 LOCK(14) 176 addl $0, -4(%esp) 177 ret 178 END(membar_sync_end) 179 180 #ifdef _KERNEL 181 NENTRY(_atomic_cas_64) 182 cli 183 pushl %edi 184 pushl %ebx 185 movl 12(%esp), %edi 186 movl 16(%esp), %eax 187 movl 20(%esp), %edx 188 movl 24(%esp), %ebx 189 movl 28(%esp), %ecx 190 cmpl 0(%edi), %eax 191 jne 2f 192 cmpl 4(%edi), %edx 193 jne 2f 194 movl %ebx, 0(%edi) 195 movl %ecx, 4(%edi) 196 1: 197 popl %ebx 198 popl %edi 199 sti 200 ret 201 2: 202 movl 0(%edi), %eax 203 movl 4(%edi), %edx 204 jmp 1b 205 END(_atomic_cas_64_end) 206 207 NENTRY(_atomic_cas_cx8) 208 pushl %edi 209 pushl %ebx 210 movl 12(%esp), %edi 211 movl 16(%esp), %eax 212 movl 20(%esp), %edx 213 movl 24(%esp), %ebx 214 movl 28(%esp), %ecx 215 LOCK(15) 216 cmpxchg8b (%edi) 217 popl %ebx 218 popl %edi 219 ret 220 .space 32, 0x90 221 END(_atomic_cas_cx8_end) 222 223 NENTRY(sse2_lfence) 224 lfence 225 ret 226 END(sse2_lfence_end) 227 228 NENTRY(sse2_mfence) 229 mfence 230 ret 231 END(sse2_mfence_end) 232 233 atomic_lockpatch: 234 .globl atomic_lockpatch 235 .long .Lpatch1, .Lpatch2, .Lpatch3, .Lpatch4, .Lpatch5 236 .long .Lpatch6, .Lpatch7, .Lpatch8, .Lpatch9, .Lpatch10 237 .long .Lpatch12, .Lpatch13, .Lpatch14, .Lpatch15, 0 238 #else 239 NENTRY(_atomic_cas_64) 240 pushl %edi 241 pushl %ebx 242 movl 12(%esp), %edi 243 movl 16(%esp), %eax 244 movl 20(%esp), %edx 245 movl 24(%esp), %ebx 246 movl 28(%esp), %ecx 247 lock 248 cmpxchg8b (%edi) 249 popl %ebx 250 popl %edi 251 ret 252 #endif /* _KERNEL */ 253 254 ALIAS(atomic_add_32,_atomic_add_32) 255 ALIAS(atomic_add_int,_atomic_add_32) 256 ALIAS(atomic_add_long,_atomic_add_32) 257 ALIAS(atomic_add_ptr,_atomic_add_32) 258 259 ALIAS(atomic_add_32_nv,_atomic_add_32_nv) 260 ALIAS(atomic_add_int_nv,_atomic_add_32_nv) 261 ALIAS(atomic_add_long_nv,_atomic_add_32_nv) 262 ALIAS(atomic_add_ptr_nv,_atomic_add_32_nv) 263 264 ALIAS(atomic_and_32,_atomic_and_32) 265 ALIAS(atomic_and_uint,_atomic_and_32) 266 ALIAS(atomic_and_ulong,_atomic_and_32) 267 ALIAS(atomic_and_ptr,_atomic_and_32) 268 269 ALIAS(atomic_and_32_nv,_atomic_and_32_nv) 270 ALIAS(atomic_and_uint_nv,_atomic_and_32_nv) 271 ALIAS(atomic_and_ulong_nv,_atomic_and_32_nv) 272 ALIAS(atomic_and_ptr_nv,_atomic_and_32_nv) 273 274 ALIAS(atomic_dec_32,_atomic_dec_32) 275 ALIAS(atomic_dec_uint,_atomic_dec_32) 276 ALIAS(atomic_dec_ulong,_atomic_dec_32) 277 ALIAS(atomic_dec_ptr,_atomic_dec_32) 278 279 ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv) 280 ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv) 281 ALIAS(atomic_dec_ulong_nv,_atomic_dec_32_nv) 282 ALIAS(atomic_dec_ptr_nv,_atomic_dec_32_nv) 283 284 ALIAS(atomic_inc_32,_atomic_inc_32) 285 ALIAS(atomic_inc_uint,_atomic_inc_32) 286 ALIAS(atomic_inc_ulong,_atomic_inc_32) 287 ALIAS(atomic_inc_ptr,_atomic_inc_32) 288 289 ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv) 290 ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv) 291 ALIAS(atomic_inc_ulong_nv,_atomic_inc_32_nv) 292 ALIAS(atomic_inc_ptr_nv,_atomic_inc_32_nv) 293 294 ALIAS(atomic_or_32,_atomic_or_32) 295 ALIAS(atomic_or_uint,_atomic_or_32) 296 ALIAS(atomic_or_ulong,_atomic_or_32) 297 ALIAS(atomic_or_ptr,_atomic_or_32) 298 299 ALIAS(atomic_or_32_nv,_atomic_or_32_nv) 300 ALIAS(atomic_or_uint_nv,_atomic_or_32_nv) 301 ALIAS(atomic_or_ulong_nv,_atomic_or_32_nv) 302 ALIAS(atomic_or_ptr_nv,_atomic_or_32_nv) 303 304 ALIAS(atomic_swap_32,_atomic_swap_32) 305 ALIAS(atomic_swap_uint,_atomic_swap_32) 306 ALIAS(atomic_swap_ulong,_atomic_swap_32) 307 ALIAS(atomic_swap_ptr,_atomic_swap_32) 308 309 ALIAS(atomic_cas_32,_atomic_cas_32) 310 ALIAS(atomic_cas_uint,_atomic_cas_32) 311 ALIAS(atomic_cas_ulong,_atomic_cas_32) 312 ALIAS(atomic_cas_ptr,_atomic_cas_32) 313 314 ALIAS(atomic_cas_64,_atomic_cas_64) 315 316 ALIAS(membar_consumer,_membar_consumer) 317 ALIAS(membar_producer,_membar_producer) 318 ALIAS(membar_enter,_membar_enter) 319 ALIAS(membar_exit,_membar_exit) 320 ALIAS(membar_sync,_membar_sync) 321 322 STRONG_ALIAS(_atomic_add_int,_atomic_add_32) 323 STRONG_ALIAS(_atomic_add_long,_atomic_add_32) 324 STRONG_ALIAS(_atomic_add_ptr,_atomic_add_32) 325 326 STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv) 327 STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_32_nv) 328 STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_32_nv) 329 330 STRONG_ALIAS(_atomic_and_uint,_atomic_and_32) 331 STRONG_ALIAS(_atomic_and_ulong,_atomic_and_32) 332 STRONG_ALIAS(_atomic_and_ptr,_atomic_and_32) 333 334 STRONG_ALIAS(_atomic_and_uint_nv,_atomic_and_32_nv) 335 STRONG_ALIAS(_atomic_and_ulong_nv,_atomic_and_32_nv) 336 STRONG_ALIAS(_atomic_and_ptr_nv,_atomic_and_32_nv) 337 338 STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32) 339 STRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_32) 340 STRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_32) 341 342 STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv) 343 STRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_32_nv) 344 STRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_32_nv) 345 346 STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32) 347 STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_32) 348 STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_32) 349 350 STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv) 351 STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_32_nv) 352 STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_32_nv) 353 354 STRONG_ALIAS(_atomic_or_uint,_atomic_or_32) 355 STRONG_ALIAS(_atomic_or_ulong,_atomic_or_32) 356 STRONG_ALIAS(_atomic_or_ptr,_atomic_or_32) 357 358 STRONG_ALIAS(_atomic_or_uint_nv,_atomic_or_32_nv) 359 STRONG_ALIAS(_atomic_or_ulong_nv,_atomic_or_32_nv) 360 STRONG_ALIAS(_atomic_or_ptr_nv,_atomic_or_32_nv) 361 362 STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32) 363 STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32) 364 STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32) 365 366 STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32) 367 STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32) 368 STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32) 369
Indexes created Wed Oct 01 07:09:59 GMT 2025