machine.h (16943B) - Raw
1 /* 2 * Copyright (c) 2007-2016 Apple, Inc. All rights reserved. 3 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved. 4 * 5 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 6 * 7 * This file contains Original Code and/or Modifications of Original Code 8 * as defined in and that are subject to the Apple Public Source License 9 * Version 2.0 (the 'License'). You may not use this file except in 10 * compliance with the License. The rights granted to you under the License 11 * may not be used to create, or enable the creation or redistribution of, 12 * unlawful or unlicensed copies of an Apple operating system, or to 13 * circumvent, violate, or enable the circumvention or violation of, any 14 * terms of an Apple operating system software license agreement. 15 * 16 * Please obtain a copy of the License at 17 * http://www.opensource.apple.com/apsl/ and read it before using this file. 18 * 19 * The Original Code and all software distributed under the License are 20 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 21 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 22 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 23 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 24 * Please see the License for the specific language governing rights and 25 * limitations under the License. 26 * 27 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 28 */ 29 /* 30 * Mach Operating System 31 * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University 32 * All Rights Reserved. 33 * 34 * Permission to use, copy, modify and distribute this software and its 35 * documentation is hereby granted, provided that both the copyright 36 * notice and this permission notice appear in all copies of the 37 * software, derivative works or modified versions, and any portions 38 * thereof, and that both notices appear in supporting documentation. 39 * 40 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 41 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 42 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 43 * 44 * Carnegie Mellon requests users of this software to return to 45 * 46 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 47 * School of Computer Science 48 * Carnegie Mellon University 49 * Pittsburgh PA 15213-3890 50 * 51 * any improvements or extensions that they make and grant Carnegie Mellon 52 * the rights to redistribute these changes. 53 */ 54 /* File: machine.h 55 * Author: Avadis Tevanian, Jr. 56 * Date: 1986 57 * 58 * Machine independent machine abstraction. 59 */ 60 61 #ifndef _MACH_MACHINE_H_ 62 #define _MACH_MACHINE_H_ 63 64 #ifndef __ASSEMBLER__ 65 66 #include <stdint.h> 67 #include <mach/machine/vm_types.h> 68 #include <mach/boolean.h> 69 70 typedef integer_t cpu_type_t; 71 typedef integer_t cpu_subtype_t; 72 typedef integer_t cpu_threadtype_t; 73 74 #define CPU_STATE_MAX 4 75 76 #define CPU_STATE_USER 0 77 #define CPU_STATE_SYSTEM 1 78 #define CPU_STATE_IDLE 2 79 #define CPU_STATE_NICE 3 80 81 82 83 /* 84 * Capability bits used in the definition of cpu_type. 85 */ 86 #define CPU_ARCH_MASK 0xff000000 /* mask for architecture bits */ 87 #define CPU_ARCH_ABI64 0x01000000 /* 64 bit ABI */ 88 #define CPU_ARCH_ABI64_32 0x02000000 /* ABI for 64-bit hardware with 32-bit types; LP32 */ 89 90 /* 91 * Machine types known by all. 92 */ 93 94 #define CPU_TYPE_ANY ((cpu_type_t) -1) 95 96 #define CPU_TYPE_VAX ((cpu_type_t) 1) 97 /* skip ((cpu_type_t) 2) */ 98 /* skip ((cpu_type_t) 3) */ 99 /* skip ((cpu_type_t) 4) */ 100 /* skip ((cpu_type_t) 5) */ 101 #define CPU_TYPE_MC680x0 ((cpu_type_t) 6) 102 #define CPU_TYPE_X86 ((cpu_type_t) 7) 103 #define CPU_TYPE_I386 CPU_TYPE_X86 /* compatibility */ 104 #define CPU_TYPE_X86_64 (CPU_TYPE_X86 | CPU_ARCH_ABI64) 105 106 /* skip CPU_TYPE_MIPS ((cpu_type_t) 8) */ 107 /* skip ((cpu_type_t) 9) */ 108 #define CPU_TYPE_MC98000 ((cpu_type_t) 10) 109 #define CPU_TYPE_HPPA ((cpu_type_t) 11) 110 #define CPU_TYPE_ARM ((cpu_type_t) 12) 111 #define CPU_TYPE_ARM64 (CPU_TYPE_ARM | CPU_ARCH_ABI64) 112 #define CPU_TYPE_ARM64_32 (CPU_TYPE_ARM | CPU_ARCH_ABI64_32) 113 #define CPU_TYPE_MC88000 ((cpu_type_t) 13) 114 #define CPU_TYPE_SPARC ((cpu_type_t) 14) 115 #define CPU_TYPE_I860 ((cpu_type_t) 15) 116 /* skip CPU_TYPE_ALPHA ((cpu_type_t) 16) */ 117 /* skip ((cpu_type_t) 17) */ 118 #define CPU_TYPE_POWERPC ((cpu_type_t) 18) 119 #define CPU_TYPE_POWERPC64 (CPU_TYPE_POWERPC | CPU_ARCH_ABI64) 120 /* skip ((cpu_type_t) 19) */ 121 /* skip ((cpu_type_t) 20) */ 122 /* skip ((cpu_type_t) 21) */ 123 /* skip ((cpu_type_t) 22) */ 124 /* skip ((cpu_type_t) 23) */ 125 /* skip ((cpu_type_t) 24) */ 126 127 /* 128 * Machine subtypes (these are defined here, instead of in a machine 129 * dependent directory, so that any program can get all definitions 130 * regardless of where is it compiled). 131 */ 132 133 /* 134 * Capability bits used in the definition of cpu_subtype. 135 */ 136 #define CPU_SUBTYPE_MASK 0xff000000 /* mask for feature flags */ 137 #define CPU_SUBTYPE_LIB64 0x80000000 /* 64 bit libraries */ 138 #define CPU_SUBTYPE_PTRAUTH_ABI 0x80000000 /* pointer authentication with versioned ABI */ 139 140 /* 141 * When selecting a slice, ANY will pick the slice with the best 142 * grading for the selected cpu_type_t, unlike the "ALL" subtypes, 143 * which are the slices that can run on any hardware for that cpu type. 144 */ 145 #define CPU_SUBTYPE_ANY ((cpu_subtype_t) -1) 146 147 /* 148 * Object files that are hand-crafted to run on any 149 * implementation of an architecture are tagged with 150 * CPU_SUBTYPE_MULTIPLE. This functions essentially the same as 151 * the "ALL" subtype of an architecture except that it allows us 152 * to easily find object files that may need to be modified 153 * whenever a new implementation of an architecture comes out. 154 * 155 * It is the responsibility of the implementor to make sure the 156 * software handles unsupported implementations elegantly. 157 */ 158 #define CPU_SUBTYPE_MULTIPLE ((cpu_subtype_t) -1) 159 #define CPU_SUBTYPE_LITTLE_ENDIAN ((cpu_subtype_t) 0) 160 #define CPU_SUBTYPE_BIG_ENDIAN ((cpu_subtype_t) 1) 161 162 /* 163 * Machine threadtypes. 164 * This is none - not defined - for most machine types/subtypes. 165 */ 166 #define CPU_THREADTYPE_NONE ((cpu_threadtype_t) 0) 167 168 /* 169 * VAX subtypes (these do *not* necessary conform to the actual cpu 170 * ID assigned by DEC available via the SID register). 171 */ 172 173 #define CPU_SUBTYPE_VAX_ALL ((cpu_subtype_t) 0) 174 #define CPU_SUBTYPE_VAX780 ((cpu_subtype_t) 1) 175 #define CPU_SUBTYPE_VAX785 ((cpu_subtype_t) 2) 176 #define CPU_SUBTYPE_VAX750 ((cpu_subtype_t) 3) 177 #define CPU_SUBTYPE_VAX730 ((cpu_subtype_t) 4) 178 #define CPU_SUBTYPE_UVAXI ((cpu_subtype_t) 5) 179 #define CPU_SUBTYPE_UVAXII ((cpu_subtype_t) 6) 180 #define CPU_SUBTYPE_VAX8200 ((cpu_subtype_t) 7) 181 #define CPU_SUBTYPE_VAX8500 ((cpu_subtype_t) 8) 182 #define CPU_SUBTYPE_VAX8600 ((cpu_subtype_t) 9) 183 #define CPU_SUBTYPE_VAX8650 ((cpu_subtype_t) 10) 184 #define CPU_SUBTYPE_VAX8800 ((cpu_subtype_t) 11) 185 #define CPU_SUBTYPE_UVAXIII ((cpu_subtype_t) 12) 186 187 /* 188 * 680x0 subtypes 189 * 190 * The subtype definitions here are unusual for historical reasons. 191 * NeXT used to consider 68030 code as generic 68000 code. For 192 * backwards compatability: 193 * 194 * CPU_SUBTYPE_MC68030 symbol has been preserved for source code 195 * compatability. 196 * 197 * CPU_SUBTYPE_MC680x0_ALL has been defined to be the same 198 * subtype as CPU_SUBTYPE_MC68030 for binary comatability. 199 * 200 * CPU_SUBTYPE_MC68030_ONLY has been added to allow new object 201 * files to be tagged as containing 68030-specific instructions. 202 */ 203 204 #define CPU_SUBTYPE_MC680x0_ALL ((cpu_subtype_t) 1) 205 #define CPU_SUBTYPE_MC68030 ((cpu_subtype_t) 1) /* compat */ 206 #define CPU_SUBTYPE_MC68040 ((cpu_subtype_t) 2) 207 #define CPU_SUBTYPE_MC68030_ONLY ((cpu_subtype_t) 3) 208 209 /* 210 * I386 subtypes 211 */ 212 213 #define CPU_SUBTYPE_INTEL(f, m) ((cpu_subtype_t) (f) + ((m) << 4)) 214 215 #define CPU_SUBTYPE_I386_ALL CPU_SUBTYPE_INTEL(3, 0) 216 #define CPU_SUBTYPE_386 CPU_SUBTYPE_INTEL(3, 0) 217 #define CPU_SUBTYPE_486 CPU_SUBTYPE_INTEL(4, 0) 218 #define CPU_SUBTYPE_486SX CPU_SUBTYPE_INTEL(4, 8) // 8 << 4 = 128 219 #define CPU_SUBTYPE_586 CPU_SUBTYPE_INTEL(5, 0) 220 #define CPU_SUBTYPE_PENT CPU_SUBTYPE_INTEL(5, 0) 221 #define CPU_SUBTYPE_PENTPRO CPU_SUBTYPE_INTEL(6, 1) 222 #define CPU_SUBTYPE_PENTII_M3 CPU_SUBTYPE_INTEL(6, 3) 223 #define CPU_SUBTYPE_PENTII_M5 CPU_SUBTYPE_INTEL(6, 5) 224 #define CPU_SUBTYPE_CELERON CPU_SUBTYPE_INTEL(7, 6) 225 #define CPU_SUBTYPE_CELERON_MOBILE CPU_SUBTYPE_INTEL(7, 7) 226 #define CPU_SUBTYPE_PENTIUM_3 CPU_SUBTYPE_INTEL(8, 0) 227 #define CPU_SUBTYPE_PENTIUM_3_M CPU_SUBTYPE_INTEL(8, 1) 228 #define CPU_SUBTYPE_PENTIUM_3_XEON CPU_SUBTYPE_INTEL(8, 2) 229 #define CPU_SUBTYPE_PENTIUM_M CPU_SUBTYPE_INTEL(9, 0) 230 #define CPU_SUBTYPE_PENTIUM_4 CPU_SUBTYPE_INTEL(10, 0) 231 #define CPU_SUBTYPE_PENTIUM_4_M CPU_SUBTYPE_INTEL(10, 1) 232 #define CPU_SUBTYPE_ITANIUM CPU_SUBTYPE_INTEL(11, 0) 233 #define CPU_SUBTYPE_ITANIUM_2 CPU_SUBTYPE_INTEL(11, 1) 234 #define CPU_SUBTYPE_XEON CPU_SUBTYPE_INTEL(12, 0) 235 #define CPU_SUBTYPE_XEON_MP CPU_SUBTYPE_INTEL(12, 1) 236 237 #define CPU_SUBTYPE_INTEL_FAMILY(x) ((x) & 15) 238 #define CPU_SUBTYPE_INTEL_FAMILY_MAX 15 239 240 #define CPU_SUBTYPE_INTEL_MODEL(x) ((x) >> 4) 241 #define CPU_SUBTYPE_INTEL_MODEL_ALL 0 242 243 /* 244 * X86 subtypes. 245 */ 246 247 #define CPU_SUBTYPE_X86_ALL ((cpu_subtype_t)3) 248 #define CPU_SUBTYPE_X86_64_ALL ((cpu_subtype_t)3) 249 #define CPU_SUBTYPE_X86_ARCH1 ((cpu_subtype_t)4) 250 #define CPU_SUBTYPE_X86_64_H ((cpu_subtype_t)8) /* Haswell feature subset */ 251 252 253 #define CPU_THREADTYPE_INTEL_HTT ((cpu_threadtype_t) 1) 254 255 /* 256 * Mips subtypes. 257 */ 258 259 #define CPU_SUBTYPE_MIPS_ALL ((cpu_subtype_t) 0) 260 #define CPU_SUBTYPE_MIPS_R2300 ((cpu_subtype_t) 1) 261 #define CPU_SUBTYPE_MIPS_R2600 ((cpu_subtype_t) 2) 262 #define CPU_SUBTYPE_MIPS_R2800 ((cpu_subtype_t) 3) 263 #define CPU_SUBTYPE_MIPS_R2000a ((cpu_subtype_t) 4) /* pmax */ 264 #define CPU_SUBTYPE_MIPS_R2000 ((cpu_subtype_t) 5) 265 #define CPU_SUBTYPE_MIPS_R3000a ((cpu_subtype_t) 6) /* 3max */ 266 #define CPU_SUBTYPE_MIPS_R3000 ((cpu_subtype_t) 7) 267 268 /* 269 * MC98000 (PowerPC) subtypes 270 */ 271 #define CPU_SUBTYPE_MC98000_ALL ((cpu_subtype_t) 0) 272 #define CPU_SUBTYPE_MC98601 ((cpu_subtype_t) 1) 273 274 /* 275 * HPPA subtypes for Hewlett-Packard HP-PA family of 276 * risc processors. Port by NeXT to 700 series. 277 */ 278 279 #define CPU_SUBTYPE_HPPA_ALL ((cpu_subtype_t) 0) 280 #define CPU_SUBTYPE_HPPA_7100 ((cpu_subtype_t) 0) /* compat */ 281 #define CPU_SUBTYPE_HPPA_7100LC ((cpu_subtype_t) 1) 282 283 /* 284 * MC88000 subtypes. 285 */ 286 #define CPU_SUBTYPE_MC88000_ALL ((cpu_subtype_t) 0) 287 #define CPU_SUBTYPE_MC88100 ((cpu_subtype_t) 1) 288 #define CPU_SUBTYPE_MC88110 ((cpu_subtype_t) 2) 289 290 /* 291 * SPARC subtypes 292 */ 293 #define CPU_SUBTYPE_SPARC_ALL ((cpu_subtype_t) 0) 294 295 /* 296 * I860 subtypes 297 */ 298 #define CPU_SUBTYPE_I860_ALL ((cpu_subtype_t) 0) 299 #define CPU_SUBTYPE_I860_860 ((cpu_subtype_t) 1) 300 301 /* 302 * PowerPC subtypes 303 */ 304 #define CPU_SUBTYPE_POWERPC_ALL ((cpu_subtype_t) 0) 305 #define CPU_SUBTYPE_POWERPC_601 ((cpu_subtype_t) 1) 306 #define CPU_SUBTYPE_POWERPC_602 ((cpu_subtype_t) 2) 307 #define CPU_SUBTYPE_POWERPC_603 ((cpu_subtype_t) 3) 308 #define CPU_SUBTYPE_POWERPC_603e ((cpu_subtype_t) 4) 309 #define CPU_SUBTYPE_POWERPC_603ev ((cpu_subtype_t) 5) 310 #define CPU_SUBTYPE_POWERPC_604 ((cpu_subtype_t) 6) 311 #define CPU_SUBTYPE_POWERPC_604e ((cpu_subtype_t) 7) 312 #define CPU_SUBTYPE_POWERPC_620 ((cpu_subtype_t) 8) 313 #define CPU_SUBTYPE_POWERPC_750 ((cpu_subtype_t) 9) 314 #define CPU_SUBTYPE_POWERPC_7400 ((cpu_subtype_t) 10) 315 #define CPU_SUBTYPE_POWERPC_7450 ((cpu_subtype_t) 11) 316 #define CPU_SUBTYPE_POWERPC_970 ((cpu_subtype_t) 100) 317 318 /* 319 * ARM subtypes 320 */ 321 #define CPU_SUBTYPE_ARM_ALL ((cpu_subtype_t) 0) 322 #define CPU_SUBTYPE_ARM_V4T ((cpu_subtype_t) 5) 323 #define CPU_SUBTYPE_ARM_V6 ((cpu_subtype_t) 6) 324 #define CPU_SUBTYPE_ARM_V5TEJ ((cpu_subtype_t) 7) 325 #define CPU_SUBTYPE_ARM_XSCALE ((cpu_subtype_t) 8) 326 #define CPU_SUBTYPE_ARM_V7 ((cpu_subtype_t) 9) /* ARMv7-A and ARMv7-R */ 327 #define CPU_SUBTYPE_ARM_V7F ((cpu_subtype_t) 10) /* Cortex A9 */ 328 #define CPU_SUBTYPE_ARM_V7S ((cpu_subtype_t) 11) /* Swift */ 329 #define CPU_SUBTYPE_ARM_V7K ((cpu_subtype_t) 12) 330 #define CPU_SUBTYPE_ARM_V8 ((cpu_subtype_t) 13) 331 #define CPU_SUBTYPE_ARM_V6M ((cpu_subtype_t) 14) /* Not meant to be run under xnu */ 332 #define CPU_SUBTYPE_ARM_V7M ((cpu_subtype_t) 15) /* Not meant to be run under xnu */ 333 #define CPU_SUBTYPE_ARM_V7EM ((cpu_subtype_t) 16) /* Not meant to be run under xnu */ 334 #define CPU_SUBTYPE_ARM_V8M ((cpu_subtype_t) 17) /* Not meant to be run under xnu */ 335 336 /* 337 * ARM64 subtypes 338 */ 339 #define CPU_SUBTYPE_ARM64_ALL ((cpu_subtype_t) 0) 340 #define CPU_SUBTYPE_ARM64_V8 ((cpu_subtype_t) 1) 341 #define CPU_SUBTYPE_ARM64E ((cpu_subtype_t) 2) 342 343 /* CPU subtype feature flags for ptrauth on arm64e platforms */ 344 #define CPU_SUBTYPE_ARM64_PTR_AUTH_MASK 0x0f000000 345 #define CPU_SUBTYPE_ARM64_PTR_AUTH_VERSION(x) (((x) & CPU_SUBTYPE_ARM64_PTR_AUTH_MASK) >> 24) 346 347 /* 348 * ARM64_32 subtypes 349 */ 350 #define CPU_SUBTYPE_ARM64_32_ALL ((cpu_subtype_t) 0) 351 #define CPU_SUBTYPE_ARM64_32_V8 ((cpu_subtype_t) 1) 352 353 354 #endif /* !__ASSEMBLER__ */ 355 356 /* 357 * CPU families (sysctl hw.cpufamily) 358 * 359 * These are meant to identify the CPU's marketing name - an 360 * application can map these to (possibly) localized strings. 361 * NB: the encodings of the CPU families are intentionally arbitrary. 362 * There is no ordering, and you should never try to deduce whether 363 * or not some feature is available based on the family. 364 * Use feature flags (eg, hw.optional.altivec) to test for optional 365 * functionality. 366 */ 367 #define CPUFAMILY_UNKNOWN 0 368 #define CPUFAMILY_POWERPC_G3 0xcee41549 369 #define CPUFAMILY_POWERPC_G4 0x77c184ae 370 #define CPUFAMILY_POWERPC_G5 0xed76d8aa 371 #define CPUFAMILY_INTEL_6_13 0xaa33392b 372 #define CPUFAMILY_INTEL_PENRYN 0x78ea4fbc 373 #define CPUFAMILY_INTEL_NEHALEM 0x6b5a4cd2 374 #define CPUFAMILY_INTEL_WESTMERE 0x573b5eec 375 #define CPUFAMILY_INTEL_SANDYBRIDGE 0x5490b78c 376 #define CPUFAMILY_INTEL_IVYBRIDGE 0x1f65e835 377 #define CPUFAMILY_INTEL_HASWELL 0x10b282dc 378 #define CPUFAMILY_INTEL_BROADWELL 0x582ed09c 379 #define CPUFAMILY_INTEL_SKYLAKE 0x37fc219f 380 #define CPUFAMILY_INTEL_KABYLAKE 0x0f817246 381 #define CPUFAMILY_INTEL_ICELAKE 0x38435547 382 #define CPUFAMILY_INTEL_COMETLAKE 0x1cf8a03e 383 #define CPUFAMILY_ARM_9 0xe73283ae 384 #define CPUFAMILY_ARM_11 0x8ff620d8 385 #define CPUFAMILY_ARM_XSCALE 0x53b005f5 386 #define CPUFAMILY_ARM_12 0xbd1b0ae9 387 #define CPUFAMILY_ARM_13 0x0cc90e64 388 #define CPUFAMILY_ARM_14 0x96077ef1 389 #define CPUFAMILY_ARM_15 0xa8511bca 390 #define CPUFAMILY_ARM_SWIFT 0x1e2d6381 391 #define CPUFAMILY_ARM_CYCLONE 0x37a09642 392 #define CPUFAMILY_ARM_TYPHOON 0x2c91a47e 393 #define CPUFAMILY_ARM_TWISTER 0x92fb37c8 394 #define CPUFAMILY_ARM_HURRICANE 0x67ceee93 395 #define CPUFAMILY_ARM_MONSOON_MISTRAL 0xe81e7ef6 396 #define CPUFAMILY_ARM_VORTEX_TEMPEST 0x07d34b9f 397 #define CPUFAMILY_ARM_LIGHTNING_THUNDER 0x462504d2 398 #define CPUFAMILY_ARM_FIRESTORM_ICESTORM 0x1b588bb3 399 #define CPUFAMILY_ARM_BLIZZARD_AVALANCHE 0xda33d83d 400 #define CPUFAMILY_ARM_EVEREST_SAWTOOTH 0x8765edea 401 #define CPUFAMILY_ARM_IBIZA 0xfa33415e 402 #define CPUFAMILY_ARM_PALMA 0x72015832 403 #define CPUFAMILY_ARM_COLL 0x2876f5b5 404 #define CPUFAMILY_ARM_LOBOS 0x5f4dea93 405 #define CPUFAMILY_ARM_DONAN 0x6f5129ac 406 #define CPUFAMILY_ARM_BRAVA 0x17d5b93a 407 #define CPUFAMILY_ARM_TAHITI 0x75d4acb9 408 #define CPUFAMILY_ARM_TUPAI 0x204526d0 409 410 /* Described in rdar://64125549 */ 411 #define CPUSUBFAMILY_UNKNOWN 0 412 #define CPUSUBFAMILY_ARM_HP 1 413 #define CPUSUBFAMILY_ARM_HG 2 414 #define CPUSUBFAMILY_ARM_M 3 415 #define CPUSUBFAMILY_ARM_HS 4 416 #define CPUSUBFAMILY_ARM_HC_HD 5 417 #define CPUSUBFAMILY_ARM_HA 6 418 419 /* The following synonyms are deprecated: */ 420 #define CPUFAMILY_INTEL_6_23 CPUFAMILY_INTEL_PENRYN 421 #define CPUFAMILY_INTEL_6_26 CPUFAMILY_INTEL_NEHALEM 422 423 424 #endif /* _MACH_MACHINE_H_ */