1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * University Copyright- Copyright (c) 1982, 1986, 1988 31 * The Regents of the University of California 32 * All Rights Reserved 33 * 34 * University Acknowledgment- Portions of this document are derived from 35 * software developed by the University of California, Berkeley, and its 36 * contributors. 37 */ 38 39 #ifndef _VM_HAT_H 40 #define _VM_HAT_H 41 42 #include <sys/types.h> 43 #include <sys/t_lock.h> 44 #include <vm/faultcode.h> 45 #include <sys/kstat.h> 46 #include <sys/siginfo.h> 47 48 #ifdef __cplusplus 49 extern "C" { 50 #endif 51 52 /* 53 * VM - Hardware Address Translation management. 54 * 55 * This file describes the machine independent interfaces to 56 * the hardware address translation management routines. Other 57 * machine specific interfaces and structures are defined 58 * in <vm/hat_xxx.h>. The hat layer manages the address 59 * translation hardware as a cache driven by calls from the 60 * higher levels of the VM system. 61 */ 62 63 struct hat; 64 struct kpme; 65 struct memseg; 66 67 #include <vm/page.h> 68 69 /* 70 * a callback used with hat_unload_callback() 71 * start and end mark are set to a range of unloaded addresses 72 * and the function is invoked with a pointer to this data structure 73 */ 74 typedef struct hat_callback { 75 caddr_t hcb_start_addr; 76 caddr_t hcb_end_addr; 77 void (*hcb_function)(struct hat_callback *); 78 void *hcb_data; 79 } hat_callback_t; 80 81 typedef void *hat_region_cookie_t; 82 83 #ifdef _KERNEL 84 85 /* 86 * One time hat initialization 87 */ 88 void hat_init(void); 89 90 /* 91 * Notify hat of a system dump 92 */ 93 void hat_dump(void); 94 95 /* 96 * Operations on an address space: 97 * 98 * struct hat *hat_alloc(as) 99 * allocated a hat structure for as. 100 * 101 * void hat_free_start(hat) 102 * informs hat layer process has finished executing but as has not 103 * been cleaned up yet. 104 * 105 * void hat_free_end(hat) 106 * informs hat layer as is being destroyed. hat layer cannot use as 107 * pointer after this call. 108 * 109 * size_t hat_get_mapped_size(hat) 110 * returns number of bytes that have valid mappings in hat. 111 * 112 * void hat_stats_enable(hat) 113 * void hat_stats_disable(hat) 114 * enables/disables collection of stats for hat. 115 * 116 * int hat_dup(parenthat, childhat, addr, len, flags) 117 * Duplicate address translations of the parent to the child. Supports 118 * the entire address range or a range depending on flag, 119 * zero returned on success, non-zero on error 120 * 121 * void hat_thread_exit(thread) 122 * Notifies the HAT that a thread is exiting, called after it has been 123 * reassigned to the kernel AS. 124 */ 125 126 struct hat *hat_alloc(struct as *); 127 void hat_free_start(struct hat *); 128 void hat_free_end(struct hat *); 129 int hat_dup(struct hat *, struct hat *, caddr_t, size_t, uint_t); 130 size_t hat_get_mapped_size(struct hat *); 131 int hat_stats_enable(struct hat *); 132 void hat_stats_disable(struct hat *); 133 void hat_thread_exit(kthread_t *); 134 135 /* 136 * Operations on a named address within a segment: 137 * 138 * void hat_memload(hat, addr, pp, attr, flags) 139 * load/lock the given page struct 140 * 141 * void hat_memload_array(hat, addr, len, ppa, attr, flags) 142 * load/lock the given array of page structs 143 * 144 * void hat_devload(hat, addr, len, pf, attr, flags) 145 * load/lock the given page frame number 146 * 147 * void hat_unlock(hat, addr, len) 148 * unlock a given range of addresses 149 * 150 * void hat_unload(hat, addr, len, flags) 151 * void hat_unload_callback(hat, addr, len, flags, callback) 152 * unload a given range of addresses (has optional callback) 153 * 154 * void hat_sync(hat, addr, len, flags) 155 * synchronize mapping with software data structures 156 * 157 * void hat_map(hat, addr, len, flags) 158 * 159 * void hat_setattr(hat, addr, len, attr) 160 * void hat_clrattr(hat, addr, len, attr) 161 * void hat_chgattr(hat, addr, len, attr) 162 * modify attributes for a range of addresses. skips any invalid mappings 163 * 164 * uint_t hat_getattr(hat, addr, *attr) 165 * returns attr for <hat,addr> in *attr. returns 0 if there was a 166 * mapping and *attr is valid, nonzero if there was no mapping and 167 * *attr is not valid. 168 * 169 * size_t hat_getpagesize(hat, addr) 170 * returns pagesize in bytes for <hat, addr>. returns -1 if there is 171 * no mapping. This is an advisory call. 172 * 173 * pfn_t hat_getpfnum(hat, addr) 174 * returns pfn for <hat, addr> or PFN_INVALID if mapping is invalid. 175 * 176 * int hat_probe(hat, addr) 177 * return 0 if no valid mapping is present. Faster version 178 * of hat_getattr in certain architectures. 179 * 180 * int hat_share(dhat, daddr, shat, saddr, len, szc) 181 * 182 * void hat_unshare(hat, addr, len, szc) 183 * 184 * void hat_chgprot(hat, addr, len, vprot) 185 * This is a deprecated call. New segment drivers should store 186 * all attributes and use hat_*attr calls. 187 * Change the protections in the virtual address range 188 * given to the specified virtual protection. If vprot is ~PROT_WRITE, 189 * then remove write permission, leaving the other permissions 190 * unchanged. If vprot is ~PROT_USER, remove user permissions. 191 * 192 * void hat_flush_range(hat, addr, size) 193 * Invalidate a virtual address translation for the local CPU. 194 */ 195 196 void hat_memload(struct hat *, caddr_t, struct page *, uint_t, uint_t); 197 void hat_memload_array(struct hat *, caddr_t, size_t, struct page **, 198 uint_t, uint_t); 199 void hat_memload_region(struct hat *, caddr_t, struct page *, uint_t, 200 uint_t, hat_region_cookie_t); 201 void hat_memload_array_region(struct hat *, caddr_t, size_t, struct page **, 202 uint_t, uint_t, hat_region_cookie_t); 203 204 void hat_devload(struct hat *, caddr_t, size_t, pfn_t, uint_t, int); 205 206 void hat_unlock(struct hat *, caddr_t, size_t); 207 void hat_unlock_region(struct hat *, caddr_t, size_t, hat_region_cookie_t); 208 209 void hat_unload(struct hat *, caddr_t, size_t, uint_t); 210 void hat_unload_callback(struct hat *, caddr_t, size_t, uint_t, 211 hat_callback_t *); 212 void hat_flush_range(struct hat *, caddr_t, size_t); 213 void hat_sync(struct hat *, caddr_t, size_t, uint_t); 214 void hat_map(struct hat *, caddr_t, size_t, uint_t); 215 void hat_setattr(struct hat *, caddr_t, size_t, uint_t); 216 void hat_clrattr(struct hat *, caddr_t, size_t, uint_t); 217 void hat_chgattr(struct hat *, caddr_t, size_t, uint_t); 218 uint_t hat_getattr(struct hat *, caddr_t, uint_t *); 219 ssize_t hat_getpagesize(struct hat *, caddr_t); 220 pfn_t hat_getpfnum(struct hat *, caddr_t); 221 int hat_probe(struct hat *, caddr_t); 222 int hat_share(struct hat *, caddr_t, struct hat *, caddr_t, size_t, uint_t); 223 void hat_unshare(struct hat *, caddr_t, size_t, uint_t); 224 void hat_chgprot(struct hat *, caddr_t, size_t, uint_t); 225 void hat_reserve(struct as *, caddr_t, size_t); 226 pfn_t va_to_pfn(void *); 227 uint64_t va_to_pa(void *); 228 229 /* 230 * Kernel Physical Mapping (segkpm) hat interface routines. 231 */ 232 caddr_t hat_kpm_mapin(struct page *, struct kpme *); 233 void hat_kpm_mapout(struct page *, struct kpme *, caddr_t); 234 caddr_t hat_kpm_mapin_pfn(pfn_t); 235 void hat_kpm_mapout_pfn(pfn_t); 236 caddr_t hat_kpm_page2va(struct page *, int); 237 struct page *hat_kpm_vaddr2page(caddr_t); 238 int hat_kpm_fault(struct hat *, caddr_t); 239 void hat_kpm_mseghash_clear(int); 240 void hat_kpm_mseghash_update(pgcnt_t, struct memseg *); 241 void hat_kpm_addmem_mseg_update(struct memseg *, pgcnt_t, offset_t); 242 void hat_kpm_addmem_mseg_insert(struct memseg *); 243 void hat_kpm_addmem_memsegs_update(struct memseg *); 244 caddr_t hat_kpm_mseg_reuse(struct memseg *); 245 void hat_kpm_delmem_mseg_update(struct memseg *, struct memseg **); 246 void hat_kpm_split_mseg_update(struct memseg *, struct memseg **, 247 struct memseg *, struct memseg *, struct memseg *); 248 void hat_kpm_walk(void (*)(void *, void *, size_t), void *); 249 250 /* 251 * Operations on all translations for a given page(s) 252 * 253 * void hat_page_setattr(pp, flag) 254 * void hat_page_clrattr(pp, flag) 255 * used to set/clr red/mod bits. 256 * 257 * uint hat_page_getattr(pp, flag) 258 * If flag is specified, returns 0 if attribute is disabled 259 * and non zero if enabled. If flag specifes multiple attributs 260 * then returns 0 if ALL atriibutes are disabled. This is an advisory 261 * call. 262 * 263 * int hat_pageunload(pp, forceflag) 264 * unload all translations attached to pp. 265 * 266 * uint_t hat_pagesync(pp, flags) 267 * get hw stats from hardware into page struct and reset hw stats 268 * returns attributes of page 269 * 270 * ulong_t hat_page_getshare(pp) 271 * returns approx number of mappings to this pp. A return of 0 implies 272 * there are no mappings to the page. 273 * 274 * faultcode_t hat_softlock(hat, addr, lenp, ppp, flags); 275 * called to softlock pages for zero copy tcp 276 * 277 * void hat_page_demote(pp); 278 * unload all large mappings to pp and decrease p_szc of all 279 * constituent pages according to the remaining mappings. 280 */ 281 282 void hat_page_setattr(struct page *, uint_t); 283 void hat_page_clrattr(struct page *, uint_t); 284 uint_t hat_page_getattr(struct page *, uint_t); 285 int hat_pageunload(struct page *, uint_t); 286 uint_t hat_pagesync(struct page *, uint_t); 287 ulong_t hat_page_getshare(struct page *); 288 int hat_page_checkshare(struct page *, ulong_t); 289 faultcode_t hat_softlock(struct hat *, caddr_t, size_t *, 290 struct page **, uint_t); 291 void hat_page_demote(struct page *); 292 293 /* 294 * Rountine to expose supported HAT features to PIM. 295 */ 296 enum hat_features { 297 HAT_SHARED_PT, /* Shared page tables */ 298 HAT_DYNAMIC_ISM_UNMAP, /* hat_pageunload() handles ISM pages */ 299 HAT_VMODSORT, /* support for VMODSORT flag of vnode */ 300 HAT_SHARED_REGIONS /* shared regions support */ 301 }; 302 303 int hat_supported(enum hat_features, void *); 304 305 /* 306 * Services provided to the hat: 307 * 308 * void as_signal_proc(as, siginfo) 309 * deliver signal to all processes that have this as. 310 * 311 * int hat_setstat(as, addr, len, rmbits) 312 * informs hatstat layer that ref/mod bits need to be updated for 313 * address range. Returns 0 on success, 1 for failure. 314 */ 315 void as_signal_proc(struct as *, k_siginfo_t *siginfo); 316 void hat_setstat(struct as *, caddr_t, size_t, uint_t); 317 318 /* 319 * Flags to pass to hat routines. 320 * 321 * Certain flags only apply to some interfaces: 322 * 323 * HAT_LOAD Default flags to load a translation to the page. 324 * HAT_LOAD_LOCK Lock down mapping resources; hat_map(), hat_memload(), 325 * and hat_devload(). 326 * HAT_LOAD_ADV Advisory load - Load translation if and only if 327 * sufficient MMU resources exist (i.e., do not steal). 328 * HAT_LOAD_SHARE A flag to hat_memload() to indicate h/w page tables 329 * that map some user pages (not kas) is shared by more 330 * than one process (eg. ISM). 331 * HAT_LOAD_CONTIG Pages are contigous 332 * HAT_LOAD_NOCONSIST Do not add mapping to mapping list. 333 * HAT_LOAD_REMAP Reload a valid pte with a different page frame. 334 * HAT_RELOAD_SHARE Reload a shared page table entry. Some platforms 335 * may require different actions than on the first 336 * load of a shared mapping. 337 * HAT_NO_KALLOC Do not kmem_alloc while creating the mapping; at this 338 * point, it's setting up mapping to allocate internal 339 * hat layer data structures. This flag forces hat layer 340 * to tap its reserves in order to prevent infinite 341 * recursion. 342 * HAT_LOAD_TEXT A flag to hat_memload() to indicate loading text pages. 343 */ 344 345 /* 346 * Flags for hat_memload/hat_devload 347 */ 348 #define HAT_FLAGS_RESV 0xFF000000 /* resv for hat impl */ 349 #define HAT_LOAD 0x00 350 #define HAT_LOAD_LOCK 0x01 351 #define HAT_LOAD_ADV 0x04 352 #define HAT_LOAD_CONTIG 0x10 353 #define HAT_LOAD_NOCONSIST 0x20 354 #define HAT_LOAD_SHARE 0x40 355 #define HAT_LOAD_REMAP 0x80 356 #define HAT_RELOAD_SHARE 0x100 357 #define HAT_NO_KALLOC 0x200 358 #define HAT_LOAD_TEXT 0x400 359 360 /* 361 * Flags for initializing disable_*large_pages. 362 * 363 * HAT_AUTO_TEXT Get MMU specific disable_auto_text_large_pages 364 * HAT_AUTO_DATA Get MMU specific disable_auto_data_large_pages 365 */ 366 #define HAT_AUTO_TEXT 0x800 367 #define HAT_AUTO_DATA 0x1000 368 369 /* 370 * Attributes for hat_memload/hat_devload/hat_*attr 371 * are a superset of prot flags defined in mman.h. 372 */ 373 #define HAT_PLAT_ATTR_MASK 0xF00000 374 #define HAT_PROT_MASK 0x0F 375 376 #define HAT_NOFAULT 0x10 377 #define HAT_NOSYNC 0x20 378 379 /* 380 * Advisory ordering attributes. Apply only to device mappings. 381 * 382 * HAT_STRICTORDER: the CPU must issue the references in order, as the 383 * programmer specified. This is the default. 384 * HAT_UNORDERED_OK: the CPU may reorder the references (this is all kinds 385 * of reordering; store or load with store or load). 386 * HAT_MERGING_OK: merging and batching: the CPU may merge individual stores 387 * to consecutive locations (for example, turn two consecutive byte 388 * stores into one halfword store), and it may batch individual loads 389 * (for example, turn two consecutive byte loads into one halfword load). 390 * This also implies re-ordering. 391 * HAT_LOADCACHING_OK: the CPU may cache the data it fetches and reuse it 392 * until another store occurs. The default is to fetch new data 393 * on every load. This also implies merging. 394 * HAT_STORECACHING_OK: the CPU may keep the data in the cache and push it to 395 * the device (perhaps with other data) at a later time. The default is 396 * to push the data right away. This also implies load caching. 397 */ 398 #define HAT_STRICTORDER 0x0000 399 #define HAT_UNORDERED_OK 0x0100 400 #define HAT_MERGING_OK 0x0200 401 #define HAT_LOADCACHING_OK 0x0300 402 #define HAT_STORECACHING_OK 0x0400 403 #define HAT_ORDER_MASK 0x0700 404 405 /* endian attributes */ 406 #define HAT_NEVERSWAP 0x0000 407 #define HAT_STRUCTURE_BE 0x1000 408 #define HAT_STRUCTURE_LE 0x2000 409 #define HAT_ENDIAN_MASK 0x3000 410 411 /* flags for hat_softlock */ 412 #define HAT_COW 0x0001 413 414 /* 415 * Flags for hat_unload 416 */ 417 #define HAT_UNLOAD 0x00 418 #define HAT_UNLOAD_NOSYNC 0x02 419 #define HAT_UNLOAD_UNLOCK 0x04 420 #define HAT_UNLOAD_OTHER 0x08 421 #define HAT_UNLOAD_UNMAP 0x10 422 423 /* 424 * Flags for hat_pagesync, hat_getstat, hat_sync 425 */ 426 #define HAT_SYNC_DONTZERO 0x00 427 #define HAT_SYNC_ZERORM 0x01 428 /* Additional flags for hat_pagesync */ 429 #define HAT_SYNC_STOPON_REF 0x02 430 #define HAT_SYNC_STOPON_MOD 0x04 431 #define HAT_SYNC_STOPON_RM (HAT_SYNC_STOPON_REF | HAT_SYNC_STOPON_MOD) 432 #define HAT_SYNC_STOPON_SHARED 0x08 433 434 /* 435 * Flags for hat_dup 436 * 437 * HAT_DUP_ALL dup entire address space 438 * HAT_DUP_COW dup plus hat_clrattr(..PROT_WRITE) on newas 439 */ 440 #define HAT_DUP_ALL 1 441 #define HAT_DUP_COW 2 442 #define HAT_DUP_SRD 3 443 444 445 /* 446 * Flags for hat_map 447 */ 448 #define HAT_MAP 0x00 449 450 /* 451 * Flag for hat_pageunload 452 */ 453 #define HAT_ADV_PGUNLOAD 0x00 454 #define HAT_FORCE_PGUNLOAD 0x01 455 456 /* 457 * Attributes for hat_page_*attr, hat_setstats and 458 * returned by hat_pagesync. 459 */ 460 #define P_MOD 0x1 /* the modified bit */ 461 #define P_REF 0x2 /* the referenced bit */ 462 #define P_RO 0x4 /* Read only page */ 463 #define P_NSH 0x8 /* Not to shuffle v_pages */ 464 465 #define hat_ismod(pp) (hat_page_getattr(pp, P_MOD)) 466 #define hat_isref(pp) (hat_page_getattr(pp, P_REF)) 467 #define hat_isro(pp) (hat_page_getattr(pp, P_RO)) 468 469 #define hat_setmod(pp) (hat_page_setattr(pp, P_MOD)) 470 #define hat_setmod_only(pp) (hat_page_setattr(pp, P_MOD|P_NSH)) 471 #define hat_setref(pp) (hat_page_setattr(pp, P_REF)) 472 #define hat_setrefmod(pp) (hat_page_setattr(pp, P_REF|P_MOD)) 473 474 #define hat_clrmod(pp) (hat_page_clrattr(pp, P_MOD)) 475 #define hat_clrref(pp) (hat_page_clrattr(pp, P_REF)) 476 #define hat_clrrefmod(pp) (hat_page_clrattr(pp, P_REF|P_MOD)) 477 478 #define hat_page_is_mapped(pp) (hat_page_getshare(pp)) 479 480 /* 481 * hat_setup is being used in sparc/os/sundep.c 482 */ 483 void hat_setup(struct hat *, int); 484 485 /* 486 * Flags for hat_setup 487 */ 488 #define HAT_DONTALLOC 0 489 #define HAT_ALLOC 1 490 #define HAT_INIT 2 491 492 /* 493 * Other routines, for statistics 494 */ 495 int hat_startstat(struct as *); 496 void hat_getstat(struct as *, caddr_t, size_t, uint_t, char *, int); 497 void hat_freestat(struct as *, int); 498 void hat_resvstat(size_t, struct as *, caddr_t); 499 500 /* 501 * Relocation callback routines. Currently only sfmmu HAT supports 502 * these. 503 */ 504 extern int hat_add_callback(id_t, caddr_t, uint_t, uint_t, void *, 505 pfn_t *, void **); 506 extern id_t hat_register_callback(int, 507 int (*prehandler)(caddr_t, uint_t, uint_t, void *), 508 int (*posthandler)(caddr_t, uint_t, uint_t, void *, pfn_t), 509 int (*errhandler)(caddr_t, uint_t, uint_t, void *), int); 510 extern void hat_delete_callback(caddr_t, uint_t, void *, uint_t, void *); 511 512 /* 513 * hat_add_callback()/hat_delete_callback() flags. 514 */ 515 #define HAC_NOSLEEP 0x0 516 #define HAC_SLEEP 0x1 517 #define HAC_PAGELOCK 0x2 518 519 /* 520 * Suspend/unsuspend handler callback arguments. 521 */ 522 #define HAT_SUSPEND 0x0010 523 #define HAT_UNSUSPEND 0x0010 524 #define HAT_PRESUSPEND 0x0020 525 #define HAT_POSTUNSUSPEND 0x0020 526 527 /* 528 * Error handler callback arguments. See the block comments 529 * before the implementation of hat_add_callback() for an 530 * explanation of what these mean. 531 */ 532 #define HAT_CB_ERR_LEAKED 0x1 533 534 #endif /* _KERNEL */ 535 536 /* 537 * The size of the bit array for ref and mod bit storage must be a power of 2. 538 * 2 bits are collected for each page. Below the power used is 4, 539 * which is 16 8-bit characters = 128 bits, ref and mod bit information 540 * for 64 pages. 541 */ 542 #define HRM_SHIFT 4 543 #define HRM_BYTES (1 << HRM_SHIFT) 544 #define HRM_PAGES ((HRM_BYTES * NBBY) / 2) 545 #define HRM_PGPERBYTE (NBBY/2) 546 #define HRM_PGBYTEMASK (HRM_PGPERBYTE-1) 547 548 #define HRM_PGOFFMASK ((HRM_PGPERBYTE-1) << MMU_PAGESHIFT) 549 #define HRM_BASEOFFSET (((MMU_PAGESIZE * HRM_PAGES) - 1)) 550 #define HRM_BASEMASK (~(HRM_BASEOFFSET)) 551 552 #define HRM_BASESHIFT (MMU_PAGESHIFT + (HRM_SHIFT + 2)) 553 #define HRM_PAGEMASK (MMU_PAGEMASK ^ HRM_BASEMASK) 554 555 #define HRM_HASHSIZE 0x200 556 #define HRM_HASHMASK (HRM_HASHSIZE - 1) 557 558 #define HRM_BLIST_INCR 0x200 559 560 /* 561 * The structure for maintaining referenced and modified information 562 */ 563 struct hrmstat { 564 struct as *hrm_as; /* stat block belongs to this as */ 565 uintptr_t hrm_base; /* base of block */ 566 ushort_t hrm_id; /* opaque identifier, one of a_vbits */ 567 struct hrmstat *hrm_anext; /* as statistics block list */ 568 struct hrmstat *hrm_hnext; /* list for hashed blocks */ 569 uchar_t hrm_bits[HRM_BYTES]; /* the ref and mod bits */ 570 }; 571 572 extern struct hrmstat **hrm_hashtab; 573 574 /* 575 * For global monitoring of the reference and modified bits 576 * of all address spaces we reserve one id bit. 577 */ 578 #define HRM_SWSMONID 1 579 580 581 #ifdef _KERNEL 582 583 /* 584 * Hat locking functions 585 * XXX - these two functions are currently being used by hatstats 586 * they can be removed by using a per-as mutex for hatstats. 587 */ 588 void hat_enter(struct hat *); 589 void hat_exit(struct hat *); 590 591 typedef void (*hat_rgn_cb_func_t)(caddr_t, caddr_t, caddr_t, 592 size_t, void *, u_offset_t); 593 594 void hat_join_srd(struct hat *, vnode_t *); 595 596 hat_region_cookie_t hat_join_region(struct hat *, caddr_t, size_t, void *, 597 u_offset_t, uchar_t, uchar_t, hat_rgn_cb_func_t, 598 uint_t); 599 void hat_leave_region(struct hat *, hat_region_cookie_t, 600 uint_t); 601 void hat_dup_region(struct hat *, hat_region_cookie_t); 602 603 #define HAT_INVALID_REGION_COOKIE ((hat_region_cookie_t)-1) 604 #define HAT_IS_REGION_COOKIE_VALID(c) ((c) != HAT_INVALID_REGION_COOKIE) 605 606 /* hat_join_region() flags */ 607 608 #define HAT_REGION_TEXT 0x1 /* passed by segvn */ 609 #define HAT_REGION_ISM 0x2 /* for hat_share()/hat_unshare() */ 610 611 #define HAT_REGION_TYPE_MASK (0x7) 612 613 #endif /* _KERNEL */ 614 615 #ifdef __cplusplus 616 } 617 #endif 618 619 #endif /* _VM_HAT_H */