1139825Simp/*- 21541Srgrimes * Copyright (c) 1991, 1993 31541Srgrimes * The Regents of the University of California. All rights reserved. 41541Srgrimes * 51541Srgrimes * This code is derived from software contributed to Berkeley by 61541Srgrimes * The Mach Operating System project at Carnegie-Mellon University. 71541Srgrimes * 81541Srgrimes * Redistribution and use in source and binary forms, with or without 91541Srgrimes * modification, are permitted provided that the following conditions 101541Srgrimes * are met: 111541Srgrimes * 1. Redistributions of source code must retain the above copyright 121541Srgrimes * notice, this list of conditions and the following disclaimer. 131541Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 141541Srgrimes * notice, this list of conditions and the following disclaimer in the 151541Srgrimes * documentation and/or other materials provided with the distribution. 161541Srgrimes * 4. Neither the name of the University nor the names of its contributors 171541Srgrimes * may be used to endorse or promote products derived from this software 181541Srgrimes * without specific prior written permission. 191541Srgrimes * 201541Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 211541Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 221541Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 231541Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 241541Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 251541Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 261541Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 271541Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 281541Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 291541Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 301541Srgrimes * SUCH DAMAGE. 311541Srgrimes * 321817Sdg * from: @(#)vm_page.h 8.2 (Berkeley) 12/13/93 331541Srgrimes * 341541Srgrimes * 351541Srgrimes * Copyright (c) 1987, 1990 Carnegie-Mellon University. 361541Srgrimes * All rights reserved. 371541Srgrimes * 381541Srgrimes * Authors: Avadis Tevanian, Jr., Michael Wayne Young 395455Sdg * 401541Srgrimes * Permission to use, copy, modify and distribute this software and 411541Srgrimes * its documentation is hereby granted, provided that both the copyright 421541Srgrimes * notice and this permission notice appear in all copies of the 431541Srgrimes * software, derivative works or modified versions, and any portions 441541Srgrimes * thereof, and that both notices appear in supporting documentation. 455455Sdg * 465455Sdg * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 475455Sdg * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 481541Srgrimes * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 495455Sdg * 501541Srgrimes * Carnegie Mellon requests users of this software to return to 511541Srgrimes * 521541Srgrimes * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 531541Srgrimes * School of Computer Science 541541Srgrimes * Carnegie Mellon University 551541Srgrimes * Pittsburgh PA 15213-3890 561541Srgrimes * 571541Srgrimes * any improvements or extensions that they make and grant Carnegie the 581541Srgrimes * rights to redistribute these changes. 591817Sdg * 6050477Speter * $FreeBSD$ 611541Srgrimes */ 621541Srgrimes 631541Srgrimes/* 641541Srgrimes * Resident memory system definitions. 651541Srgrimes */ 661541Srgrimes 671541Srgrimes#ifndef _VM_PAGE_ 681541Srgrimes#define _VM_PAGE_ 691541Srgrimes 706816Sdg#include <vm/pmap.h> 7138517Sdfr 721541Srgrimes/* 731541Srgrimes * Management of resident (logical) pages. 741541Srgrimes * 751541Srgrimes * A small structure is kept for each resident 761541Srgrimes * page, indexed by page number. Each structure 77251367Salc * is an element of several collections: 781541Srgrimes * 79251367Salc * A radix tree used to quickly 801541Srgrimes * perform object/offset lookups 811541Srgrimes * 821541Srgrimes * A list of all pages for a given object, 831541Srgrimes * so they can be quickly deactivated at 841541Srgrimes * time of deallocation. 851541Srgrimes * 861541Srgrimes * An ordered list of pages due for pageout. 871541Srgrimes * 881541Srgrimes * In addition, the structure contains the object 891541Srgrimes * and offset to which this page belongs (for pageout), 901541Srgrimes * and sundry status bits. 911541Srgrimes * 92223307Salc * In general, operations on this structure's mutable fields are 93223307Salc * synchronized using either one of or a combination of the lock on the 94223307Salc * object that the page belongs to (O), the pool lock for the page (P), 95242941Salc * or the lock for either the free or paging queue (Q). If a field is 96223307Salc * annotated below with two of these locks, then holding either lock is 97225840Skib * sufficient for read access, but both locks are required for write 98223307Salc * access. 99223307Salc * 100225840Skib * In contrast, the synchronization of accesses to the page's 101225840Skib * dirty field is machine dependent (M). In the 102225840Skib * machine-independent layer, the lock on the object that the 103225840Skib * page belongs to must be held in order to operate on the field. 104225840Skib * However, the pmap layer is permitted to set all bits within 105225840Skib * the field without holding that lock. If the underlying 106225840Skib * architecture does not support atomic read-modify-write 107225840Skib * operations on the field's type, then the machine-independent 108225843Skib * layer uses a 32-bit atomic on the aligned 32-bit word that 109225840Skib * contains the dirty field. In the machine-independent layer, 110225840Skib * the implementation of read-modify-write operations on the 111225840Skib * field is encapsulated in vm_page_clear_dirty_mask(). 1121541Srgrimes */ 1131541Srgrimes 114227102Skib#if PAGE_SIZE == 4096 115227102Skib#define VM_PAGE_BITS_ALL 0xffu 116227102Skibtypedef uint8_t vm_page_bits_t; 117227102Skib#elif PAGE_SIZE == 8192 118227102Skib#define VM_PAGE_BITS_ALL 0xffffu 119227102Skibtypedef uint16_t vm_page_bits_t; 120227102Skib#elif PAGE_SIZE == 16384 121227102Skib#define VM_PAGE_BITS_ALL 0xffffffffu 122227102Skibtypedef uint32_t vm_page_bits_t; 123227102Skib#elif PAGE_SIZE == 32768 124227102Skib#define VM_PAGE_BITS_ALL 0xfffffffffffffffflu 125227102Skibtypedef uint64_t vm_page_bits_t; 126227102Skib#endif 127227102Skib 1281541Srgrimesstruct vm_page { 129254182Skib union { 130254182Skib TAILQ_ENTRY(vm_page) q; /* page queue or free list (Q) */ 131254182Skib struct { 132254182Skib SLIST_ENTRY(vm_page) ss; /* private slists */ 133254182Skib void *pv; 134254182Skib } s; 135254182Skib struct { 136254182Skib u_long p; 137254182Skib u_long v; 138254182Skib } memguard; 139254182Skib } plinks; 140254182Skib TAILQ_ENTRY(vm_page) listq; /* pages in same object (O) */ 141254182Skib vm_object_t object; /* which object am I in (O,P) */ 142217479Salc vm_pindex_t pindex; /* offset into object (O,P) */ 143121511Salc vm_paddr_t phys_addr; /* physical address of page */ 14460755Speter struct md_page md; /* machine dependant stuff */ 145255608Skib u_int wire_count; /* wired down maps refs (P) */ 146255608Skib volatile u_int busy_lock; /* busy owners lock */ 147255608Skib uint16_t hold_count; /* page hold count (P) */ 148255608Skib uint16_t flags; /* page PG_* flags (P) */ 149255608Skib uint8_t aflags; /* access is atomic */ 150255608Skib uint8_t oflags; /* page VPO_* flags (O) */ 151207702Salc uint8_t queue; /* page queue index (P,Q) */ 152186719Skib int8_t segind; 153170816Salc uint8_t order; /* index of the buddy queue */ 154170816Salc uint8_t pool; 155249278Sattilio u_char act_count; /* page usage count (P) */ 156254182Skib /* NOTE that these must support one bit per DEV_BSIZE in a page */ 15713490Sdyson /* so, on normal X86 kernels, they must be at least 8 bits wide */ 158227102Skib vm_page_bits_t valid; /* map of valid DEV_BSIZE chunks (O) */ 159227102Skib vm_page_bits_t dirty; /* map of dirty DEV_BSIZE chunks (M) */ 1601541Srgrimes}; 1611541Srgrimes 162161125Salc/* 163161125Salc * Page flags stored in oflags: 164161125Salc * 165161125Salc * Access to these page flags is synchronized by the lock on the object 166161125Salc * containing the page (O). 167224746Skib * 168224746Skib * Note: VPO_UNMANAGED (used by OBJT_DEVICE, OBJT_PHYS and OBJT_SG) 169224746Skib * indicates that the page is not under PV management but 170224746Skib * otherwise should be treated as a normal page. Pages not 171224746Skib * under PV management cannot be paged out via the 172224746Skib * object/vm_page_t because there is no knowledge of their pte 173224746Skib * mappings, and such pages are also not on any PQ queue. 174224746Skib * 175161125Salc */ 176254138Sattilio#define VPO_UNUSED01 0x01 /* --available-- */ 177254138Sattilio#define VPO_SWAPSLEEP 0x02 /* waiting for swap to finish */ 178242300Salc#define VPO_UNMANAGED 0x04 /* no PV management for page */ 179242300Salc#define VPO_SWAPINPROG 0x08 /* swap I/O in progress on page */ 180242300Salc#define VPO_NOSYNC 0x10 /* do not collect for syncer */ 181161125Salc 182254138Sattilio/* 183254138Sattilio * Busy page implementation details. 184254138Sattilio * The algorithm is taken mostly by rwlock(9) and sx(9) locks implementation, 185254138Sattilio * even if the support for owner identity is removed because of size 186254138Sattilio * constraints. Checks on lock recursion are then not possible, while the 187254138Sattilio * lock assertions effectiveness is someway reduced. 188254138Sattilio */ 189254138Sattilio#define VPB_BIT_SHARED 0x01 190254138Sattilio#define VPB_BIT_EXCLUSIVE 0x02 191254138Sattilio#define VPB_BIT_WAITERS 0x04 192254138Sattilio#define VPB_BIT_FLAGMASK \ 193254138Sattilio (VPB_BIT_SHARED | VPB_BIT_EXCLUSIVE | VPB_BIT_WAITERS) 194254138Sattilio 195254138Sattilio#define VPB_SHARERS_SHIFT 3 196254138Sattilio#define VPB_SHARERS(x) \ 197254138Sattilio (((x) & ~VPB_BIT_FLAGMASK) >> VPB_SHARERS_SHIFT) 198254138Sattilio#define VPB_SHARERS_WORD(x) ((x) << VPB_SHARERS_SHIFT | VPB_BIT_SHARED) 199254138Sattilio#define VPB_ONE_SHARER (1 << VPB_SHARERS_SHIFT) 200254138Sattilio 201254138Sattilio#define VPB_SINGLE_EXCLUSIVER VPB_BIT_EXCLUSIVE 202254138Sattilio 203254138Sattilio#define VPB_UNBUSIED VPB_SHARERS_WORD(0) 204254138Sattilio 205217508Salc#define PQ_NONE 255 206217508Salc#define PQ_INACTIVE 0 207217508Salc#define PQ_ACTIVE 1 208242300Salc#define PQ_COUNT 2 20918169Sdyson 210242941SalcTAILQ_HEAD(pglist, vm_page); 211254182SkibSLIST_HEAD(spglist, vm_page); 21218169Sdyson 213242941Salcstruct vm_pagequeue { 214242941Salc struct mtx pq_mutex; 215242941Salc struct pglist pq_pl; 216254065Skib int pq_cnt; 217254065Skib int * const pq_vcnt; 218254065Skib const char * const pq_name; 219242941Salc} __aligned(CACHE_LINE_SIZE); 22052647Salc 221242941Salc 222254065Skibstruct vm_domain { 223254065Skib struct vm_pagequeue vmd_pagequeues[PQ_COUNT]; 224254065Skib u_int vmd_page_count; 225254065Skib u_int vmd_free_count; 226254065Skib long vmd_segs; /* bitmask of the segments */ 227254065Skib boolean_t vmd_oom; 228254065Skib int vmd_pass; /* local pagedaemon pass */ 229254065Skib struct vm_page vmd_marker; /* marker for pagedaemon private use */ 230254065Skib}; 231254065Skib 232254065Skibextern struct vm_domain vm_dom[MAXMEMDOM]; 233254065Skib 234242941Salc#define vm_pagequeue_assert_locked(pq) mtx_assert(&(pq)->pq_mutex, MA_OWNED) 235242941Salc#define vm_pagequeue_lock(pq) mtx_lock(&(pq)->pq_mutex) 236242941Salc#define vm_pagequeue_unlock(pq) mtx_unlock(&(pq)->pq_mutex) 237242941Salc 238254065Skib#ifdef _KERNEL 239254065Skibstatic __inline void 240254065Skibvm_pagequeue_cnt_add(struct vm_pagequeue *pq, int addend) 241254065Skib{ 242254065Skib 243254065Skib#ifdef notyet 244254065Skib vm_pagequeue_assert_locked(pq); 245254065Skib#endif 246254065Skib pq->pq_cnt += addend; 247254065Skib atomic_add_int(pq->pq_vcnt, addend); 248254065Skib} 249254065Skib#define vm_pagequeue_cnt_inc(pq) vm_pagequeue_cnt_add((pq), 1) 250254065Skib#define vm_pagequeue_cnt_dec(pq) vm_pagequeue_cnt_add((pq), -1) 251254065Skib#endif /* _KERNEL */ 252254065Skib 253242402Sattilioextern struct mtx_padalign vm_page_queue_free_mtx; 254242402Sattilioextern struct mtx_padalign pa_lock[]; 255197750Salc 256207410Skmacy#if defined(__arm__) 257207410Skmacy#define PDRSHIFT PDR_SHIFT 258207410Skmacy#elif !defined(PDRSHIFT) 259207410Skmacy#define PDRSHIFT 21 260207410Skmacy#endif 261207410Skmacy 262207410Skmacy#define pa_index(pa) ((pa) >> PDRSHIFT) 263242402Sattilio#define PA_LOCKPTR(pa) ((struct mtx *)(&pa_lock[pa_index(pa) % PA_LOCK_COUNT])) 264207410Skmacy#define PA_LOCKOBJPTR(pa) ((struct lock_object *)PA_LOCKPTR((pa))) 265207410Skmacy#define PA_LOCK(pa) mtx_lock(PA_LOCKPTR(pa)) 266207410Skmacy#define PA_TRYLOCK(pa) mtx_trylock(PA_LOCKPTR(pa)) 267207410Skmacy#define PA_UNLOCK(pa) mtx_unlock(PA_LOCKPTR(pa)) 268207410Skmacy#define PA_UNLOCK_COND(pa) \ 269207410Skmacy do { \ 270208504Salc if ((pa) != 0) { \ 271208504Salc PA_UNLOCK((pa)); \ 272208504Salc (pa) = 0; \ 273208504Salc } \ 274207410Skmacy } while (0) 275207410Skmacy 276207410Skmacy#define PA_LOCK_ASSERT(pa, a) mtx_assert(PA_LOCKPTR(pa), (a)) 277207410Skmacy 278228133Skib#ifdef KLD_MODULE 279228133Skib#define vm_page_lock(m) vm_page_lock_KBI((m), LOCK_FILE, LOCK_LINE) 280228133Skib#define vm_page_unlock(m) vm_page_unlock_KBI((m), LOCK_FILE, LOCK_LINE) 281228133Skib#define vm_page_trylock(m) vm_page_trylock_KBI((m), LOCK_FILE, LOCK_LINE) 282251183Salc#else /* !KLD_MODULE */ 283251183Salc#define vm_page_lockptr(m) (PA_LOCKPTR(VM_PAGE_TO_PHYS((m)))) 284251183Salc#define vm_page_lock(m) mtx_lock(vm_page_lockptr((m))) 285251183Salc#define vm_page_unlock(m) mtx_unlock(vm_page_lockptr((m))) 286251183Salc#define vm_page_trylock(m) mtx_trylock(vm_page_lockptr((m))) 287251183Salc#endif 288228133Skib#if defined(INVARIANTS) 289251280Salc#define vm_page_assert_locked(m) \ 290251280Salc vm_page_assert_locked_KBI((m), __FILE__, __LINE__) 291228133Skib#define vm_page_lock_assert(m, a) \ 292228133Skib vm_page_lock_assert_KBI((m), (a), __FILE__, __LINE__) 293228133Skib#else 294251280Salc#define vm_page_assert_locked(m) 295228133Skib#define vm_page_lock_assert(m, a) 296228133Skib#endif 297207410Skmacy 2981541Srgrimes/* 299238998Salc * The vm_page's aflags are updated using atomic operations. To set or clear 300238998Salc * these flags, the functions vm_page_aflag_set() and vm_page_aflag_clear() 301238998Salc * must be used. Neither these flags nor these functions are part of the KBI. 3021541Srgrimes * 303251280Salc * PGA_REFERENCED may be cleared only if the page is locked. It is set by 304251280Salc * both the MI and MD VM layers. However, kernel loadable modules should not 305251280Salc * directly set this flag. They should call vm_page_reference() instead. 306208990Salc * 307225418Skib * PGA_WRITEABLE is set exclusively on managed pages by pmap_enter(). When it 308254138Sattilio * does so, the page must be exclusive busied. The MI VM layer must never 309254138Sattilio * access this flag directly. Instead, it should call 310254138Sattilio * pmap_page_is_write_mapped(). 311233949Snwhitehorn * 312233949Snwhitehorn * PGA_EXECUTABLE may be set by pmap routines, and indicates that a page has 313237168Salc * at least one executable mapping. It is not consumed by the MI VM layer. 3141541Srgrimes */ 315225418Skib#define PGA_WRITEABLE 0x01 /* page may be mapped writeable */ 316225418Skib#define PGA_REFERENCED 0x02 /* page has been referenced */ 317233949Snwhitehorn#define PGA_EXECUTABLE 0x04 /* page may be mapped executable */ 3181541Srgrimes 3199507Sdg/* 320225418Skib * Page flags. If changed at any other time than page allocation or 321225418Skib * freeing, the modification must be protected by the vm_page lock. 322225418Skib */ 323242300Salc#define PG_CACHED 0x0001 /* page is cached */ 324242300Salc#define PG_FREE 0x0002 /* page is free */ 325242300Salc#define PG_FICTITIOUS 0x0004 /* physical page doesn't exist */ 326242300Salc#define PG_ZERO 0x0008 /* page is zeroed */ 327242300Salc#define PG_MARKER 0x0010 /* special queue marker page */ 328242300Salc#define PG_WINATCFLS 0x0040 /* flush dirty page on inactive q */ 329242300Salc#define PG_NODUMP 0x0080 /* don't include this page in a dump */ 330242300Salc#define PG_UNHOLDFREE 0x0100 /* delayed free of a held page */ 331225418Skib 332225418Skib/* 3339507Sdg * Misc constants. 3349507Sdg */ 3359507Sdg#define ACT_DECLINE 1 3369507Sdg#define ACT_ADVANCE 3 33716750Sdyson#define ACT_INIT 5 33818169Sdyson#define ACT_MAX 64 3399507Sdg 34055206Speter#ifdef _KERNEL 341169291Salc 342238998Salc#include <sys/systm.h> 343238998Salc 344238998Salc#include <machine/atomic.h> 345238998Salc 3461541Srgrimes/* 347243176Salc * Each pageable resident page falls into one of four lists: 3481541Srgrimes * 3495455Sdg * free 3501541Srgrimes * Available for allocation now. 3519507Sdg * 3529507Sdg * cache 353172317Salc * Almost available for allocation. Still associated with 354172317Salc * an object, but clean and immediately freeable. 3559507Sdg * 356171420Salc * The following lists are LRU sorted: 357171420Salc * 3581541Srgrimes * inactive 35913765Smpp * Low activity, candidates for reclamation. 3601541Srgrimes * This is the list of pages that should be 3611541Srgrimes * paged out next. 3629507Sdg * 3631541Srgrimes * active 3649507Sdg * Pages that are "active" i.e. they have been 3659507Sdg * recently referenced. 36610544Sdyson * 3671541Srgrimes */ 3681541Srgrimes 36912767Sdysonextern int vm_page_zero_count; 37012767Sdyson 3715455Sdgextern vm_page_t vm_page_array; /* First resident page in table */ 372235359Skibextern long vm_page_array_size; /* number of vm_page_t's */ 3735455Sdgextern long first_page; /* first physical page number */ 3741541Srgrimes 375170816Salc#define VM_PAGE_IS_FREE(m) (((m)->flags & PG_FREE) != 0) 376170816Salc 3771541Srgrimes#define VM_PAGE_TO_PHYS(entry) ((entry)->phys_addr) 3781541Srgrimes 379235372Skibvm_page_t PHYS_TO_VM_PAGE(vm_paddr_t pa); 3801541Srgrimes 381100276Salc/* page allocation classes: */ 38233109Sdyson#define VM_ALLOC_NORMAL 0 38333109Sdyson#define VM_ALLOC_INTERRUPT 1 38433109Sdyson#define VM_ALLOC_SYSTEM 2 385100276Salc#define VM_ALLOC_CLASS_MASK 3 386100276Salc/* page allocation flags: */ 387106276Sjeff#define VM_ALLOC_WIRED 0x0020 /* non pageable */ 388106276Sjeff#define VM_ALLOC_ZERO 0x0040 /* Try to obtain a zeroed page */ 389106276Sjeff#define VM_ALLOC_NOOBJ 0x0100 /* No associated object */ 390136850Salc#define VM_ALLOC_NOBUSY 0x0200 /* Do not busy the page */ 391172317Salc#define VM_ALLOC_IFCACHED 0x0400 /* Fail if the page is not cached */ 392172317Salc#define VM_ALLOC_IFNOTCACHED 0x0800 /* Fail if the page is cached */ 393209713Skib#define VM_ALLOC_IGN_SBUSY 0x1000 /* vm_page_grab() only */ 394230623Skmacy#define VM_ALLOC_NODUMP 0x2000 /* don't include in dump */ 395254138Sattilio#define VM_ALLOC_SBUSY 0x4000 /* Shared busy the page */ 3965455Sdg 397209713Skib#define VM_ALLOC_COUNT_SHIFT 16 398209713Skib#define VM_ALLOC_COUNT(count) ((count) << VM_ALLOC_COUNT_SHIFT) 399209713Skib 400243040Skib#ifdef M_NOWAIT 401243040Skibstatic inline int 402243040Skibmalloc2vm_flags(int malloc_flags) 403243040Skib{ 404243040Skib int pflags; 405243040Skib 406243131Skib KASSERT((malloc_flags & M_USE_RESERVE) == 0 || 407243131Skib (malloc_flags & M_NOWAIT) != 0, 408243131Skib ("M_USE_RESERVE requires M_NOWAIT")); 409243040Skib pflags = (malloc_flags & M_USE_RESERVE) != 0 ? VM_ALLOC_INTERRUPT : 410243040Skib VM_ALLOC_SYSTEM; 411243040Skib if ((malloc_flags & M_ZERO) != 0) 412243040Skib pflags |= VM_ALLOC_ZERO; 413243040Skib if ((malloc_flags & M_NODUMP) != 0) 414243040Skib pflags |= VM_ALLOC_NODUMP; 415243040Skib return (pflags); 416243040Skib} 417243040Skib#endif 418243040Skib 419254138Sattiliovoid vm_page_busy_downgrade(vm_page_t m); 420254138Sattiliovoid vm_page_busy_sleep(vm_page_t m, const char *msg); 42179248Sdillonvoid vm_page_flash(vm_page_t m); 42279248Sdillonvoid vm_page_hold(vm_page_t mem); 42379248Sdillonvoid vm_page_unhold(vm_page_t mem); 42479248Sdillonvoid vm_page_free(vm_page_t m); 42579248Sdillonvoid vm_page_free_zero(vm_page_t m); 42679248Sdillon 42779248Sdillonvoid vm_page_activate (vm_page_t); 428251591Salcvoid vm_page_advise(vm_page_t m, int advice); 42979248Sdillonvm_page_t vm_page_alloc (vm_object_t, vm_pindex_t, int); 430227568Salcvm_page_t vm_page_alloc_contig(vm_object_t object, vm_pindex_t pindex, int req, 431227568Salc u_long npages, vm_paddr_t low, vm_paddr_t high, u_long alignment, 432227568Salc vm_paddr_t boundary, vm_memattr_t memattr); 433215973Sjchandravm_page_t vm_page_alloc_freelist(int, int); 43479248Sdillonvm_page_t vm_page_grab (vm_object_t, vm_pindex_t, int); 435193126Salcvoid vm_page_cache(vm_page_t); 436172341Salcvoid vm_page_cache_free(vm_object_t, vm_pindex_t, vm_pindex_t); 437172317Salcvoid vm_page_cache_transfer(vm_object_t, vm_pindex_t, vm_object_t); 43879248Sdillonint vm_page_try_to_cache (vm_page_t); 43979248Sdillonint vm_page_try_to_free (vm_page_t); 44079248Sdillonvoid vm_page_deactivate (vm_page_t); 441242941Salcvoid vm_page_dequeue(vm_page_t m); 442242941Salcvoid vm_page_dequeue_locked(vm_page_t m); 443209685Skibvm_page_t vm_page_find_least(vm_object_t, vm_pindex_t); 444219476Salcvm_page_t vm_page_getfake(vm_paddr_t paddr, vm_memattr_t memattr); 445235366Skibvoid vm_page_initfake(vm_page_t m, vm_paddr_t paddr, vm_memattr_t memattr); 446254141Sattilioint vm_page_insert (vm_page_t, vm_object_t, vm_pindex_t); 447234039Salcboolean_t vm_page_is_cached(vm_object_t object, vm_pindex_t pindex); 44879248Sdillonvm_page_t vm_page_lookup (vm_object_t, vm_pindex_t); 449209407Salcvm_page_t vm_page_next(vm_page_t m); 450207410Skmacyint vm_page_pa_tryrelock(pmap_t, vm_paddr_t, vm_paddr_t *); 451254065Skibstruct vm_pagequeue *vm_page_pagequeue(vm_page_t m); 452209407Salcvm_page_t vm_page_prev(vm_page_t m); 453219476Salcvoid vm_page_putfake(vm_page_t m); 454239246Skibvoid vm_page_readahead_finish(vm_page_t m); 455225418Skibvoid vm_page_reference(vm_page_t m); 45679248Sdillonvoid vm_page_remove (vm_page_t); 457254141Sattilioint vm_page_rename (vm_page_t, vm_object_t, vm_pindex_t); 458254141Sattiliovm_page_t vm_page_replace(vm_page_t mnew, vm_object_t object, 459254141Sattilio vm_pindex_t pindex); 460242941Salcvoid vm_page_requeue(vm_page_t m); 461242941Salcvoid vm_page_requeue_locked(vm_page_t m); 462254138Sattilioint vm_page_sbusied(vm_page_t m); 463228156Skibvoid vm_page_set_valid_range(vm_page_t m, int base, int size); 464254138Sattilioint vm_page_sleep_if_busy(vm_page_t m, const char *msg); 465127868Salcvm_offset_t vm_page_startup(vm_offset_t vaddr); 466254138Sattiliovoid vm_page_sunbusy(vm_page_t m); 467254138Sattilioint vm_page_trysbusy(vm_page_t m); 468216511Salcvoid vm_page_unhold_pages(vm_page_t *ma, int count); 46979248Sdillonvoid vm_page_unwire (vm_page_t, int); 470219476Salcvoid vm_page_updatefake(vm_page_t m, vm_paddr_t paddr, vm_memattr_t memattr); 47179248Sdillonvoid vm_page_wire (vm_page_t); 472254138Sattiliovoid vm_page_xunbusy_hard(vm_page_t m); 47379248Sdillonvoid vm_page_set_validclean (vm_page_t, int, int); 47479248Sdillonvoid vm_page_clear_dirty (vm_page_t, int, int); 47579248Sdillonvoid vm_page_set_invalid (vm_page_t, int, int); 47679248Sdillonint vm_page_is_valid (vm_page_t, int, int); 47779248Sdillonvoid vm_page_test_dirty (vm_page_t); 478227102Skibvm_page_bits_t vm_page_bits(int base, int size); 47945347Sjulianvoid vm_page_zero_invalid(vm_page_t m, boolean_t setvalid); 48043752Sdillonvoid vm_page_free_toq(vm_page_t m); 48182314Spetervoid vm_page_zero_idle_wakeup(void); 48298849Sken 483237346Salcvoid vm_page_dirty_KBI(vm_page_t m); 484228133Skibvoid vm_page_lock_KBI(vm_page_t m, const char *file, int line); 485228133Skibvoid vm_page_unlock_KBI(vm_page_t m, const char *file, int line); 486228133Skibint vm_page_trylock_KBI(vm_page_t m, const char *file, int line); 487228133Skib#if defined(INVARIANTS) || defined(INVARIANT_SUPPORT) 488251280Salcvoid vm_page_assert_locked_KBI(vm_page_t m, const char *file, int line); 489228133Skibvoid vm_page_lock_assert_KBI(vm_page_t m, int a, const char *file, int line); 490228133Skib#endif 491228133Skib 492254138Sattilio#define vm_page_assert_sbusied(m) \ 493254138Sattilio KASSERT(vm_page_sbusied(m), \ 494254138Sattilio ("vm_page_assert_sbusied: page %p not shared busy @ %s:%d", \ 495254138Sattilio (void *)m, __FILE__, __LINE__)); 496254138Sattilio 497254138Sattilio#define vm_page_assert_unbusied(m) \ 498254138Sattilio KASSERT(!vm_page_busied(m), \ 499254138Sattilio ("vm_page_assert_unbusied: page %p busy @ %s:%d", \ 500254138Sattilio (void *)m, __FILE__, __LINE__)); 501254138Sattilio 502254138Sattilio#define vm_page_assert_xbusied(m) \ 503254138Sattilio KASSERT(vm_page_xbusied(m), \ 504254138Sattilio ("vm_page_assert_xbusied: page %p not exclusive busy @ %s:%d", \ 505254138Sattilio (void *)m, __FILE__, __LINE__)); 506254138Sattilio 507254138Sattilio#define vm_page_busied(m) \ 508254138Sattilio ((m)->busy_lock != VPB_UNBUSIED) 509254138Sattilio 510254138Sattilio#define vm_page_sbusy(m) do { \ 511254138Sattilio if (!vm_page_trysbusy(m)) \ 512254138Sattilio panic("%s: page %p failed shared busing", __func__, m); \ 513254138Sattilio} while (0) 514254138Sattilio 515254138Sattilio#define vm_page_tryxbusy(m) \ 516254138Sattilio (atomic_cmpset_acq_int(&m->busy_lock, VPB_UNBUSIED, \ 517254138Sattilio VPB_SINGLE_EXCLUSIVER)) 518254138Sattilio 519254138Sattilio#define vm_page_xbusied(m) \ 520254138Sattilio ((m->busy_lock & VPB_SINGLE_EXCLUSIVER) != 0) 521254138Sattilio 522254138Sattilio#define vm_page_xbusy(m) do { \ 523254138Sattilio if (!vm_page_tryxbusy(m)) \ 524254138Sattilio panic("%s: page %p failed exclusive busing", __func__, \ 525254138Sattilio m); \ 526254138Sattilio} while (0) 527254138Sattilio 528254138Sattilio#define vm_page_xunbusy(m) do { \ 529254138Sattilio if (!atomic_cmpset_rel_int(&(m)->busy_lock, \ 530254138Sattilio VPB_SINGLE_EXCLUSIVER, VPB_UNBUSIED)) \ 531254138Sattilio vm_page_xunbusy_hard(m); \ 532254138Sattilio} while (0) 533254138Sattilio 534222992Skib#ifdef INVARIANTS 535222992Skibvoid vm_page_object_lock_assert(vm_page_t m); 536222992Skib#define VM_PAGE_OBJECT_LOCK_ASSERT(m) vm_page_object_lock_assert(m) 537222992Skib#else 538222992Skib#define VM_PAGE_OBJECT_LOCK_ASSERT(m) (void)0 539222992Skib#endif 540222992Skib 541105549Salc/* 542238998Salc * We want to use atomic updates for the aflags field, which is 8 bits wide. 543238998Salc * However, not all architectures support atomic operations on 8-bit 544238998Salc * destinations. In order that we can easily use a 32-bit operation, we 545238998Salc * require that the aflags field be 32-bit aligned. 546238998Salc */ 547238998SalcCTASSERT(offsetof(struct vm_page, aflags) % sizeof(uint32_t) == 0); 548238998Salc 549238998Salc/* 550238998Salc * Clear the given bits in the specified page. 551238998Salc */ 552238998Salcstatic inline void 553238998Salcvm_page_aflag_clear(vm_page_t m, uint8_t bits) 554238998Salc{ 555238998Salc uint32_t *addr, val; 556238998Salc 557238998Salc /* 558251280Salc * The PGA_REFERENCED flag can only be cleared if the page is locked. 559238998Salc */ 560238998Salc if ((bits & PGA_REFERENCED) != 0) 561251280Salc vm_page_assert_locked(m); 562238998Salc 563238998Salc /* 564238998Salc * Access the whole 32-bit word containing the aflags field with an 565238998Salc * atomic update. Parallel non-atomic updates to the other fields 566238998Salc * within this word are handled properly by the atomic update. 567238998Salc */ 568238998Salc addr = (void *)&m->aflags; 569238998Salc KASSERT(((uintptr_t)addr & (sizeof(uint32_t) - 1)) == 0, 570238998Salc ("vm_page_aflag_clear: aflags is misaligned")); 571238998Salc val = bits; 572238998Salc#if BYTE_ORDER == BIG_ENDIAN 573238998Salc val <<= 24; 574238998Salc#endif 575238998Salc atomic_clear_32(addr, val); 576238998Salc} 577238998Salc 578238998Salc/* 579238998Salc * Set the given bits in the specified page. 580238998Salc */ 581238998Salcstatic inline void 582238998Salcvm_page_aflag_set(vm_page_t m, uint8_t bits) 583238998Salc{ 584238998Salc uint32_t *addr, val; 585238998Salc 586238998Salc /* 587238998Salc * The PGA_WRITEABLE flag can only be set if the page is managed and 588254138Sattilio * exclusive busied. Currently, this flag is only set by pmap_enter(). 589238998Salc */ 590238998Salc KASSERT((bits & PGA_WRITEABLE) == 0 || 591254138Sattilio ((m->oflags & VPO_UNMANAGED) == 0 && vm_page_xbusied(m)), 592254138Sattilio ("vm_page_aflag_set: PGA_WRITEABLE and not exclusive busy")); 593238998Salc 594238998Salc /* 595238998Salc * Access the whole 32-bit word containing the aflags field with an 596238998Salc * atomic update. Parallel non-atomic updates to the other fields 597238998Salc * within this word are handled properly by the atomic update. 598238998Salc */ 599238998Salc addr = (void *)&m->aflags; 600238998Salc KASSERT(((uintptr_t)addr & (sizeof(uint32_t) - 1)) == 0, 601238998Salc ("vm_page_aflag_set: aflags is misaligned")); 602238998Salc val = bits; 603238998Salc#if BYTE_ORDER == BIG_ENDIAN 604238998Salc val <<= 24; 605238998Salc#endif 606238998Salc atomic_set_32(addr, val); 607238998Salc} 608238998Salc 609238998Salc/* 610237346Salc * vm_page_dirty: 611237346Salc * 612237346Salc * Set all bits in the page's dirty field. 613237346Salc * 614237346Salc * The object containing the specified page must be locked if the 615237346Salc * call is made from the machine-independent layer. 616237346Salc * 617237346Salc * See vm_page_clear_dirty_mask(). 618237346Salc */ 619237346Salcstatic __inline void 620237346Salcvm_page_dirty(vm_page_t m) 621237346Salc{ 622237346Salc 623237346Salc /* Use vm_page_dirty_KBI() under INVARIANTS to save memory. */ 624237346Salc#if defined(KLD_MODULE) || defined(INVARIANTS) 625237346Salc vm_page_dirty_KBI(m); 626237346Salc#else 627237346Salc m->dirty = VM_PAGE_BITS_ALL; 628237346Salc#endif 629237346Salc} 630237346Salc 631237346Salc/* 632242941Salc * vm_page_remque: 633242941Salc * 634242941Salc * If the given page is in a page queue, then remove it from that page 635242941Salc * queue. 636242941Salc * 637242941Salc * The page must be locked. 638242941Salc */ 639242941Salcstatic inline void 640242941Salcvm_page_remque(vm_page_t m) 641242941Salc{ 642242941Salc 643242941Salc if (m->queue != PQ_NONE) 644242941Salc vm_page_dequeue(m); 645242941Salc} 646242941Salc 647242941Salc/* 648105549Salc * vm_page_undirty: 649105549Salc * 650105549Salc * Set page to not be dirty. Note: does not clear pmap modify bits 651105549Salc */ 652105549Salcstatic __inline void 653105549Salcvm_page_undirty(vm_page_t m) 654105549Salc{ 655222992Skib 656222992Skib VM_PAGE_OBJECT_LOCK_ASSERT(m); 657105549Salc m->dirty = 0; 658105549Salc} 659105549Salc 66055206Speter#endif /* _KERNEL */ 6615455Sdg#endif /* !_VM_PAGE_ */ 662