1/* $NetBSD: uvm_extern.h,v 1.233 2023/02/26 07:27:14 skrll Exp $ */ 2 3/* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 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 ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp 28 */ 29 30/*- 31 * Copyright (c) 1991, 1992, 1993 32 * The Regents of the University of California. All rights reserved. 33 * 34 * Redistribution and use in source and binary forms, with or without 35 * modification, are permitted provided that the following conditions 36 * are met: 37 * 1. Redistributions of source code must retain the above copyright 38 * notice, this list of conditions and the following disclaimer. 39 * 2. Redistributions in binary form must reproduce the above copyright 40 * notice, this list of conditions and the following disclaimer in the 41 * documentation and/or other materials provided with the distribution. 42 * 3. Neither the name of the University nor the names of its contributors 43 * may be used to endorse or promote products derived from this software 44 * without specific prior written permission. 45 * 46 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 47 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 48 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 49 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 50 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 51 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 52 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 53 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 54 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 55 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 56 * SUCH DAMAGE. 57 * 58 * @(#)vm_extern.h 8.5 (Berkeley) 5/3/95 59 */ 60 61#ifndef _UVM_UVM_EXTERN_H_ 62#define _UVM_UVM_EXTERN_H_ 63 64/* 65 * uvm_extern.h: this file defines the external interface to the VM system. 66 * 67 * this should be the only file included by non-VM parts of the kernel 68 * which need access to VM services. if you want to know the interface 69 * to the MI VM layer without knowing the details, this is the file to 70 * learn. 71 * 72 * NOTE: vm system calls are prototyped in syscallargs.h 73 */ 74 75#include <sys/types.h> 76 77/* 78 * defines 79 */ 80 81/* 82 * the following defines are for uvm_map and functions which call it. 83 */ 84 85/* protections bits */ 86#define UVM_PROT_MASK 0x07 /* protection mask */ 87#define UVM_PROT_NONE 0x00 /* protection none */ 88#define UVM_PROT_ALL 0x07 /* everything */ 89#define UVM_PROT_READ 0x01 /* read */ 90#define UVM_PROT_WRITE 0x02 /* write */ 91#define UVM_PROT_EXEC 0x04 /* exec */ 92 93/* protection short codes */ 94#define UVM_PROT_R 0x01 /* read */ 95#define UVM_PROT_W 0x02 /* write */ 96#define UVM_PROT_RW 0x03 /* read-write */ 97#define UVM_PROT_X 0x04 /* exec */ 98#define UVM_PROT_RX 0x05 /* read-exec */ 99#define UVM_PROT_WX 0x06 /* write-exec */ 100#define UVM_PROT_RWX 0x07 /* read-write-exec */ 101 102/* 0x08: not used */ 103 104/* inherit codes */ 105#define UVM_INH_MASK 0x30 /* inherit mask */ 106#define UVM_INH_SHARE 0x00 /* "share" */ 107#define UVM_INH_COPY 0x10 /* "copy" */ 108#define UVM_INH_NONE 0x20 /* "none" */ 109#define UVM_INH_DONATE 0x30 /* "donate" << not used */ 110 111/* 0x40, 0x80: not used */ 112 113/* bits 0x700: max protection, 0x800: not used */ 114 115/* bits 0x7000: advice, 0x8000: not used */ 116/* advice: matches MADV_* from sys/mman.h and POSIX_FADV_* from sys/fcntl.h */ 117#define UVM_ADV_NORMAL 0x0 /* 'normal' */ 118#define UVM_ADV_RANDOM 0x1 /* 'random' */ 119#define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */ 120#define UVM_ADV_WILLNEED 0x3 /* pages will be needed */ 121#define UVM_ADV_DONTNEED 0x4 /* pages won't be needed */ 122#define UVM_ADV_NOREUSE 0x5 /* pages will be used only once */ 123#define UVM_ADV_MASK 0x7 /* mask */ 124 125/* bits 0xffff0000: mapping flags */ 126#define UVM_FLAG_FIXED 0x00010000 /* find space */ 127#define UVM_FLAG_OVERLAY 0x00020000 /* establish overlay */ 128#define UVM_FLAG_NOMERGE 0x00040000 /* don't merge map entries */ 129#define UVM_FLAG_COPYONW 0x00080000 /* set copy_on_write flag */ 130#define UVM_FLAG_AMAPPAD 0x00100000 /* for bss: pad amap */ 131#define UVM_FLAG_TRYLOCK 0x00200000 /* fail if we can not lock map */ 132#define UVM_FLAG_NOWAIT 0x00400000 /* not allowed to sleep */ 133#define UVM_FLAG_WAITVA 0x00800000 /* wait for va */ 134#define UVM_FLAG_VAONLY 0x02000000 /* unmap: no pages are mapped */ 135#define UVM_FLAG_COLORMATCH 0x04000000 /* match color given in off */ 136#define UVM_FLAG_UNMAP 0x08000000 /* unmap existing entries */ 137 138#define UVM_FLAG_BITS "\177\020\ 139F\0\3\ 140:\0PROT=NONE\0\ 141:\1PROT=R\0\ 142:\2PROT=W\0\ 143:\3PROT=RW\0\ 144:\4PROT=X\0\ 145:\5PROT=RX\0\ 146:\6PROT=WX\0\ 147:\7PROT=RWX\0\ 148F\4\2\ 149:\0INH=SHARE\0\ 150:\1INH=COPY\0\ 151:\2INH=NONE\0\ 152:\3INH=DONATE\0\ 153F\10\3\ 154:\0MAXPROT=NONE\0\ 155:\1MAXPROT=R\0\ 156:\2MAXPROT=W\0\ 157:\3MAXPROT=RW\0\ 158:\4MAXPROT=X\0\ 159:\5MAXPROT=RX\0\ 160:\6MAXPROT=WX\0\ 161:\7MAXPROT=RWX\0\ 162F\14\3\ 163:\0ADV=NORMAL\0\ 164:\1ADV=RANDOM\0\ 165:\2ADV=SEQUENTIAL\0\ 166:\3ADV=WILLNEED\0\ 167:\4ADV=DONTNEED\0\ 168:\5ADV=NOREUSE\0\ 169b\20FIXED\0\ 170b\21OVERLAY\0\ 171b\22NOMERGE\0\ 172b\23COPYONW\0\ 173b\24AMAPPAD\0\ 174b\25TRYLOCK\0\ 175b\26NOWAIT\0\ 176b\27WAITVA\0\ 177b\30VAONLY\0\ 178b\31COLORMATCH\0\ 179b\32UNMAP\0\ 180" 181 182/* macros to extract info */ 183#define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 184#define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 185#define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 186#define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 187 188#define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 189 (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 190 191/* magic offset value: offset not known(obj) or don't care(!obj) */ 192#define UVM_UNKNOWN_OFFSET ((voff_t) -1) 193 194/* 195 * the following defines are for uvm_km_alloc/free's flags 196 */ 197#define UVM_KMF_WIRED 0x1 /* allocation type: wired */ 198#define UVM_KMF_PAGEABLE 0x2 /* allocation type: pageable */ 199#define UVM_KMF_VAONLY 0x4 /* allocation type: VA only */ 200#define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED) 201#define UVM_KMF_CANFAIL 0x8 /* caller handles failure */ 202#define UVM_KMF_ZERO 0x10 /* want zero filled memory */ 203#define UVM_KMF_EXEC 0x20 /* need executable mapping */ 204#define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 205#define UVM_KMF_NOWAIT UVM_FLAG_NOWAIT /* not allowed to sleep */ 206#define UVM_KMF_WAITVA UVM_FLAG_WAITVA /* sleep for va */ 207#define UVM_KMF_COLORMATCH UVM_FLAG_COLORMATCH /* start at color in align */ 208 209/* 210 * the following defines the strategies for uvm_pagealloc_strat() 211 */ 212#define UVM_PGA_STRAT_NORMAL 0 /* priority (low id to high) walk */ 213#define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 214#define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 215#define UVM_PGA_STRAT_NUMA 3 /* strongly prefer ideal bucket */ 216 217/* 218 * flags for uvm_pagealloc_strat() 219 */ 220#define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */ 221#define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */ 222 223/* 224 * flags for ubc_uiomove() 225 */ 226#define UBC_READ 0x001 /* reading from object */ 227#define UBC_WRITE 0x002 /* writing to object */ 228#define UBC_FAULTBUSY 0x004 /* nobody else is using these pages, so busy 229 * them at alloc and unbusy at release (e.g., 230 * for writes extending a file) */ 231#define UBC_ISMAPPED 0x008 /* object may be mapped by a process */ 232 233/* 234 * flags for ubc_release() 235 */ 236#define UBC_UNMAP 0x010 /* unmap pages now -- don't leave the 237 * mappings cached indefinitely */ 238 239/* 240 * flags for ubc_uiomove() 241 */ 242#define UBC_PARTIALOK 0x100 /* return early on error; otherwise, zero all 243 * remaining bytes after error */ 244 245/* 246 * flags for uvn_findpages(). 247 */ 248#define UFP_ALL 0x00 249#define UFP_NOWAIT 0x01 250#define UFP_NOALLOC 0x02 251#define UFP_NOCACHE 0x04 252#define UFP_NORDONLY 0x08 253#define UFP_DIRTYONLY 0x10 254#define UFP_BACKWARD 0x20 255#define UFP_NOBUSY 0x40 256 257/* 258 * lockflags that control the locking behavior of various functions. 259 */ 260#define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 261#define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 262 263/* 264 * Default number of pages to allocate on the stack 265 */ 266#define UBC_MAX_PAGES 8 267 268/* 269 * Value representing inactive emap. 270 */ 271#define UVM_EMAP_INACTIVE (0) 272 273/* 274 * structures 275 */ 276 277struct buf; 278struct core; 279struct loadavg; 280struct mount; 281struct pglist; 282struct proc; 283struct uio; 284struct uvm_object; 285struct vm_anon; 286struct vmspace; 287struct pmap; 288struct vnode; 289struct vm_map_entry; 290struct vm_map; 291struct vm_page; 292struct vmtotal; 293 294/* 295 * uvm_pctparam: parameter to be shown as percentage to user. 296 */ 297 298#define UVM_PCTPARAM_SHIFT 8 299#define UVM_PCTPARAM_SCALE (1 << UVM_PCTPARAM_SHIFT) 300#define UVM_PCTPARAM_APPLY(pct, x) \ 301 (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT) 302struct uvm_pctparam { 303 int pct_pct; /* percent [0, 100] */ /* should be the first member */ 304 int pct_scaled; 305 int (*pct_check)(struct uvm_pctparam *, int); 306}; 307 308/* 309 * uvmexp: global data structures that are exported to parts of the kernel 310 * other than the vm system. 311 */ 312 313struct uvmexp { 314 /* vm_page constants */ 315 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 316 int pagemask; /* page mask */ 317 int pageshift; /* page shift */ 318 319 /* vm_page counters */ 320 int npages; /* number of pages we manage */ 321 int free; /* number of free pages */ 322 int paging; /* number of pages in the process of being paged out */ 323 int wired; /* number of wired pages */ 324 325 /* 326 * Adding anything before this line will break binary compatibility 327 * with top(1) on NetBSD 1.5. 328 */ 329 330 int ncolors; /* number of page color buckets: must be p-o-2 */ 331 int colormask; /* color bucket mask */ 332 333 int zeropages; /* number of zero'd pages */ 334 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 335 int reserve_kernel; /* number of pages reserved for kernel */ 336 unsigned anonpages; /* number of pages used by anon mappings */ 337 unsigned filepages; /* number of pages used by cached file data */ 338 unsigned execpages; /* number of pages used by cached exec data */ 339 340 /* pageout params */ 341 int freemin; /* min number of free pages */ 342 int freetarg; /* target number of free pages */ 343 int wiredmax; /* max number of wired pages */ 344 345 /* swap */ 346 int nswapdev; /* number of configured swap devices in system */ 347 int swpages; /* number of PAGE_SIZE'ed swap pages */ 348 int swpgavail; /* number of swap pages currently available */ 349 int swpginuse; /* number of swap pages in use */ 350 int swpgonly; /* number of swap pages in use, not also in RAM */ 351 int nswget; /* number of times fault calls uvm_swap_get() */ 352 353 /* stat counters. XXX: should be 64-bit counters */ 354 int faults; /* page fault count */ 355 int traps; /* trap count */ 356 int intrs; /* interrupt count */ 357 int swtch; /* context switch count */ 358 int softs; /* software interrupt count */ 359 int syscalls; /* system calls */ 360 int pageins; /* pagein operation count */ 361 /* pageouts are in pdpageouts below */ 362 int _unused1; 363 int _unused2; 364 int pgswapin; /* pages swapped in */ 365 int pgswapout; /* pages swapped out */ 366 int forks; /* forks */ 367 int forks_ppwait; /* forks where parent waits */ 368 int forks_sharevm; /* forks where vmspace is shared */ 369 int pga_zerohit; /* pagealloc where zero wanted and zero 370 was available */ 371 int pga_zeromiss; /* pagealloc where zero wanted and zero 372 not available */ 373 int zeroaborts; /* number of times page zeroing was 374 aborted */ 375 int colorhit; /* pagealloc where we got optimal color */ 376 int colormiss; /* pagealloc where we didn't */ 377 int cpuhit; /* pagealloc where we allocated locally */ 378 int cpumiss; /* pagealloc where we didn't */ 379 380 /* fault subcounters. XXX: should be 64-bit counters */ 381 int fltnoram; /* number of times fault was out of ram */ 382 int fltnoanon; /* number of times fault was out of anons */ 383 int fltpgwait; /* number of times fault had to wait on a page */ 384 int fltpgrele; /* number of times fault found a released page */ 385 int fltrelck; /* number of times fault relock called */ 386 int fltrelckok; /* number of times fault relock is a success */ 387 int fltanget; /* number of times fault gets anon page */ 388 int fltanretry; /* number of times fault retrys an anon get */ 389 int fltamcopy; /* number of times fault clears "needs copy" */ 390 int fltnamap; /* number of times fault maps a neighbor anon page */ 391 int fltnomap; /* number of times fault maps a neighbor obj page */ 392 int fltlget; /* number of times fault does a locked pgo_get */ 393 int fltget; /* number of times fault does an unlocked get */ 394 int flt_anon; /* number of times fault anon (case 1a) */ 395 int flt_acow; /* number of times fault anon cow (case 1b) */ 396 int flt_obj; /* number of times fault is on object page (2a) */ 397 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 398 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 399 400 /* daemon counters. XXX: should be 64-bit counters */ 401 int pdwoke; /* number of times daemon woke up */ 402 int pdrevs; /* number of times daemon rev'd clock hand */ 403 int _unused3; 404 int pdfreed; /* number of pages daemon freed since boot */ 405 int pdscans; /* number of pages daemon scanned since boot */ 406 int pdanscan; /* number of anonymous pages scanned by daemon */ 407 int pdobscan; /* number of object pages scanned by daemon */ 408 int pdreact; /* number of pages daemon reactivated since boot */ 409 int pdbusy; /* number of times daemon found a busy page */ 410 int pdpageouts; /* number of times daemon started a pageout */ 411 int pdpending; /* number of times daemon got a pending pagout */ 412 int pddeact; /* number of pages daemon deactivates */ 413 int pdreanon; /* anon pages reactivated due to thresholds */ 414 int pdrefile; /* file pages reactivated due to thresholds */ 415 int pdreexec; /* executable pages reactivated due to thresholds */ 416 417 int bootpages; /* number of pages stolen at boot */ 418}; 419 420/* 421 * The following structure is 64-bit alignment safe. New elements 422 * should only be added to the end of this structure so binary 423 * compatibility can be preserved. 424 */ 425struct uvmexp_sysctl { 426 int64_t pagesize; 427 int64_t pagemask; 428 int64_t pageshift; 429 int64_t npages; 430 int64_t free; 431 int64_t active; 432 int64_t inactive; 433 int64_t paging; 434 int64_t wired; 435 int64_t zeropages; 436 int64_t reserve_pagedaemon; 437 int64_t reserve_kernel; 438 int64_t freemin; 439 int64_t freetarg; 440 int64_t inactarg; /* unused */ 441 int64_t wiredmax; 442 int64_t nswapdev; 443 int64_t swpages; 444 int64_t swpginuse; 445 int64_t swpgonly; 446 int64_t nswget; 447 int64_t unused1; /* unused; was nanon */ 448 int64_t cpuhit; 449 int64_t cpumiss; 450 int64_t faults; 451 int64_t traps; 452 int64_t intrs; 453 int64_t swtch; 454 int64_t softs; 455 int64_t syscalls; 456 int64_t pageins; 457 int64_t swapins; /* unused */ 458 int64_t swapouts; /* unused */ 459 int64_t pgswapin; /* unused */ 460 int64_t pgswapout; 461 int64_t forks; 462 int64_t forks_ppwait; 463 int64_t forks_sharevm; 464 int64_t pga_zerohit; 465 int64_t pga_zeromiss; 466 int64_t zeroaborts; 467 int64_t fltnoram; 468 int64_t fltnoanon; 469 int64_t fltpgwait; 470 int64_t fltpgrele; 471 int64_t fltrelck; 472 int64_t fltrelckok; 473 int64_t fltanget; 474 int64_t fltanretry; 475 int64_t fltamcopy; 476 int64_t fltnamap; 477 int64_t fltnomap; 478 int64_t fltlget; 479 int64_t fltget; 480 int64_t flt_anon; 481 int64_t flt_acow; 482 int64_t flt_obj; 483 int64_t flt_prcopy; 484 int64_t flt_przero; 485 int64_t pdwoke; 486 int64_t pdrevs; 487 int64_t unused4; 488 int64_t pdfreed; 489 int64_t pdscans; 490 int64_t pdanscan; 491 int64_t pdobscan; 492 int64_t pdreact; 493 int64_t pdbusy; 494 int64_t pdpageouts; 495 int64_t pdpending; 496 int64_t pddeact; 497 int64_t anonpages; 498 int64_t filepages; 499 int64_t execpages; 500 int64_t colorhit; 501 int64_t colormiss; 502 int64_t ncolors; 503 int64_t bootpages; 504 int64_t poolpages; 505 int64_t countsyncone; 506 int64_t countsyncall; 507 int64_t anonunknown; 508 int64_t anonclean; 509 int64_t anondirty; 510 int64_t fileunknown; 511 int64_t fileclean; 512 int64_t filedirty; 513 int64_t fltup; 514 int64_t fltnoup; 515}; 516 517#ifdef _KERNEL 518/* we need this before including uvm_page.h on some platforms */ 519extern struct uvmexp uvmexp; 520#endif 521 522/* 523 * Finally, bring in standard UVM headers. 524 */ 525#include <sys/vmmeter.h> 526#include <sys/queue.h> 527#include <sys/lock.h> 528#ifdef _KERNEL 529#include <sys/vmem.h> 530#endif 531#include <uvm/uvm_param.h> 532#include <uvm/uvm_prot.h> 533#include <uvm/uvm_pmap.h> 534#if defined(_KERNEL) || defined(_KMEMUSER) 535#include <uvm/uvm_map.h> 536#include <uvm/uvm_pager.h> 537#endif 538 539#ifdef _KERNEL 540/* 541 * Include the uvm_hotplug(9) API unconditionally until 542 * uvm_page_physload() et. al. are obsoleted 543 * 544 * After this, MD code will have to explicitly include it if needed. 545 */ 546#include <uvm/uvm_physseg.h> 547#endif 548 549/* 550 * helpers for calling ubc_release() 551 */ 552#ifdef PMAP_CACHE_VIVT 553#define UBC_VNODE_FLAGS(vp) \ 554 ((((vp)->v_iflag & VI_TEXT) != 0 ? UBC_UNMAP : 0) | \ 555 (((vp)->v_vflag & VV_MAPPED) != 0 ? UBC_ISMAPPED : 0)) 556#else 557#define UBC_VNODE_FLAGS(vp) \ 558 (((vp)->v_vflag & VV_MAPPED) != 0 ? UBC_ISMAPPED : 0) 559#endif 560 561#if defined(_KERNEL) || defined(_KMEMUSER) 562/* 563 * Shareable process virtual address space. 564 * May eventually be merged with vm_map. 565 * Several fields are temporary (text, data stuff). 566 */ 567struct vmspace { 568 struct vm_map vm_map; /* VM address map */ 569 volatile int vm_refcnt; /* number of references */ 570 void * vm_shm; /* SYS5 shared memory private data XXX */ 571/* we copy from vm_startcopy to the end of the structure on fork */ 572#define vm_startcopy vm_rssize 573 segsz_t vm_rssize; /* current resident set size in pages */ 574 segsz_t vm_rssmax; /* max resident size in pages */ 575 segsz_t vm_tsize; /* text size (pages) XXX */ 576 segsz_t vm_dsize; /* data size (pages) XXX */ 577 segsz_t vm_ssize; /* stack size (pages) */ 578 segsz_t vm_issize; /* initial unmapped stack size (pages) */ 579 void * vm_taddr; /* user virtual address of text XXX */ 580 void * vm_daddr; /* user virtual address of data XXX */ 581 void *vm_maxsaddr; /* user VA at max stack growth */ 582 void *vm_minsaddr; /* user VA at top of stack */ 583 size_t vm_aslr_delta_mmap; /* mmap() random delta for ASLR */ 584}; 585#define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map) 586#endif 587 588#ifdef _KERNEL 589 590/* 591 * used to keep state while iterating over the map for a core dump. 592 */ 593struct uvm_coredump_state { 594 void *cookie; /* opaque for the caller */ 595 vaddr_t start; /* start of region */ 596 vaddr_t realend; /* real end of region */ 597 vaddr_t end; /* virtual end of region */ 598 vm_prot_t prot; /* protection of region */ 599 int flags; /* flags; see below */ 600}; 601 602#define UVM_COREDUMP_STACK 0x01 /* region is user stack */ 603 604/* 605 * the various kernel maps, owned by MD code 606 */ 607extern struct vm_map *kernel_map; 608extern struct vm_map *phys_map; 609 610/* 611 * uvm_voaddr: 612 * 613 * This structure encapsulates UVM's unique virtual object address 614 * for an individual byte inside a pageable page. Pageable pages can 615 * be owned by either a uvm_object or a vm_anon. 616 * 617 * In each case, the byte offset into the owning object 618 * (uvm_object or vm_anon) is included in the ID, so that 619 * two different offsets into the same page have distinct 620 * IDs. 621 * 622 * Note that the page does not necessarily have to be resident 623 * in order to know the virtual object address. However, it 624 * is required that any pending copy-on-write is resolved. 625 * 626 * When someone wants a virtual object address, an extra reference 627 * is taken on the owner while the caller uses the ID. This 628 * ensures that the identity is stable for the duration of its 629 * use. 630 */ 631struct uvm_voaddr { 632 uintptr_t object; 633 voff_t offset; 634}; 635 636/* 637 * macros 638 */ 639 640#define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap)) 641 642 643/* vm_machdep.c */ 644int vmapbuf(struct buf *, vsize_t); 645void vunmapbuf(struct buf *, vsize_t); 646void ktext_write(void *, const void *, size_t); 647 648/* uvm_aobj.c */ 649struct uvm_object *uao_create(voff_t, int); 650void uao_set_pgfl(struct uvm_object *, int); 651void uao_detach(struct uvm_object *); 652void uao_reference(struct uvm_object *); 653 654/* uvm_bio.c */ 655void ubc_init(void); 656void ubchist_init(void); 657int ubc_uiomove(struct uvm_object *, struct uio *, vsize_t, 658 int, int); 659void ubc_zerorange(struct uvm_object *, off_t, size_t, int); 660void ubc_purge(struct uvm_object *); 661 662/* uvm_fault.c */ 663#define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0) 664int uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int); 665 /* handle a page fault */ 666 667/* uvm_glue.c */ 668#if defined(KGDB) 669void uvm_chgkprot(void *, size_t, int); 670#endif 671void uvm_proc_fork(struct proc *, struct proc *, bool); 672void uvm_lwp_fork(struct lwp *, struct lwp *, 673 void *, size_t, void (*)(void *), void *); 674int uvm_coredump_walkmap(struct proc *, 675 int (*)(struct uvm_coredump_state *), void *); 676int uvm_coredump_count_segs(struct proc *); 677void uvm_proc_exit(struct proc *); 678void uvm_lwp_exit(struct lwp *); 679void uvm_idle(void); 680void uvm_init_limits(struct proc *); 681bool uvm_kernacc(void *, size_t, vm_prot_t); 682__dead void uvm_scheduler(void); 683vaddr_t uvm_uarea_alloc(void); 684void uvm_uarea_free(vaddr_t); 685vaddr_t uvm_uarea_system_alloc(struct cpu_info *); 686void uvm_uarea_system_free(vaddr_t); 687vaddr_t uvm_lwp_getuarea(lwp_t *); 688void uvm_lwp_setuarea(lwp_t *, vaddr_t); 689int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t); 690void uvm_vsunlock(struct vmspace *, void *, size_t); 691void uvm_cpu_attach(struct cpu_info *); 692 693 694/* uvm_init.c */ 695void uvm_md_init(void); 696void uvm_init(void); 697 698/* uvm_io.c */ 699int uvm_io(struct vm_map *, struct uio *, int); 700 701/* uvm_km.c */ 702vaddr_t uvm_km_alloc(struct vm_map *, vsize_t, vsize_t, 703 uvm_flag_t); 704int uvm_km_protect(struct vm_map *, vaddr_t, vsize_t, 705 vm_prot_t); 706void uvm_km_free(struct vm_map *, vaddr_t, vsize_t, 707 uvm_flag_t); 708 709struct vm_map *uvm_km_suballoc(struct vm_map *, vaddr_t *, 710 vaddr_t *, vsize_t, int, bool, 711 struct vm_map *); 712int uvm_km_kmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, 713 vmem_addr_t *); 714void uvm_km_kmem_free(vmem_t *, vmem_addr_t, vmem_size_t); 715bool uvm_km_va_starved_p(void); 716 717/* uvm_map.c */ 718int uvm_map(struct vm_map *, vaddr_t *, vsize_t, 719 struct uvm_object *, voff_t, vsize_t, 720 uvm_flag_t); 721int uvm_map_pageable(struct vm_map *, vaddr_t, 722 vaddr_t, bool, int); 723int uvm_map_pageable_all(struct vm_map *, int, vsize_t); 724bool uvm_map_checkprot(struct vm_map *, vaddr_t, 725 vaddr_t, vm_prot_t); 726int uvm_map_protect(struct vm_map *, vaddr_t, 727 vaddr_t, vm_prot_t, bool); 728int uvm_map_protect_user(struct lwp *, vaddr_t, vaddr_t, 729 vm_prot_t); 730struct vmspace *uvmspace_alloc(vaddr_t, vaddr_t, bool); 731void uvmspace_init(struct vmspace *, struct pmap *, 732 vaddr_t, vaddr_t, bool); 733void uvmspace_exec(struct lwp *, vaddr_t, vaddr_t, bool); 734void uvmspace_spawn(struct lwp *, vaddr_t, vaddr_t, bool); 735struct vmspace *uvmspace_fork(struct vmspace *); 736void uvmspace_addref(struct vmspace *); 737void uvmspace_free(struct vmspace *); 738void uvmspace_share(struct proc *, struct proc *); 739void uvmspace_unshare(struct lwp *); 740 741bool uvm_voaddr_acquire(struct vm_map *, vaddr_t, 742 struct uvm_voaddr *); 743void uvm_voaddr_release(struct uvm_voaddr *); 744int uvm_voaddr_compare(const struct uvm_voaddr *, 745 const struct uvm_voaddr *); 746 747void uvm_whatis(uintptr_t, void (*)(const char *, ...)); 748 749/* uvm_meter.c */ 750int uvm_sysctl(int *, u_int, void *, size_t *, 751 void *, size_t, struct proc *); 752int uvm_pctparam_check(struct uvm_pctparam *, int); 753void uvm_pctparam_set(struct uvm_pctparam *, int); 754int uvm_pctparam_get(struct uvm_pctparam *); 755void uvm_pctparam_init(struct uvm_pctparam *, int, 756 int (*)(struct uvm_pctparam *, int)); 757int uvm_pctparam_createsysctlnode(struct uvm_pctparam *, 758 const char *, const char *); 759void uvm_update_uvmexp(void); 760 761/* uvm_mmap.c */ 762int uvm_mmap_dev(struct proc *, void **, size_t, dev_t, 763 off_t); 764int uvm_mmap_anon(struct proc *, void **, size_t); 765vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t, 766 int); 767 768/* uvm_mremap.c */ 769int uvm_mremap(struct vm_map *, vaddr_t, vsize_t, 770 struct vm_map *, vaddr_t *, vsize_t, 771 struct proc *, int); 772 773/* uvm_object.c */ 774void uvm_obj_init(struct uvm_object *, 775 const struct uvm_pagerops *, bool, u_int); 776void uvm_obj_setlock(struct uvm_object *, krwlock_t *); 777void uvm_obj_destroy(struct uvm_object *, bool); 778int uvm_obj_wirepages(struct uvm_object *, off_t, off_t, 779 struct pglist *); 780void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t); 781bool uvm_obj_clean_p(struct uvm_object *); 782bool uvm_obj_nowriteback_p(struct uvm_object *); 783bool uvm_obj_page_dirty_p(struct vm_page *); 784void uvm_obj_page_set_dirty(struct vm_page *); 785void uvm_obj_page_clear_dirty(struct vm_page *); 786bool uvm_obj_page_writeback_p(struct vm_page *); 787void uvm_obj_page_set_writeback(struct vm_page *); 788void uvm_obj_page_clear_writeback(struct vm_page *); 789 790/* uvm_page.c */ 791int uvm_availmem(bool); 792void uvm_page_numa_load(paddr_t, paddr_t, u_int); 793struct vm_page *uvm_pagealloc_strat(struct uvm_object *, 794 voff_t, struct vm_anon *, int, int, int); 795#define uvm_pagealloc(obj, off, anon, flags) \ 796 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 797 UVM_PGA_STRAT_NORMAL, 0) 798void uvm_pagereplace(struct vm_page *, 799 struct vm_page *); 800int uvm_pagerealloc(struct vm_page *, 801 struct uvm_object *, voff_t); 802void uvm_setpagesize(void); 803 804/* uvm_pager.c */ 805void uvm_aio_aiodone(struct buf *); 806void uvm_aio_aiodone_pages(struct vm_page **, int, bool, 807 int); 808 809/* uvm_pdaemon.c */ 810void uvm_pageout(void *); 811struct work; 812void uvm_aiodone_worker(struct work *, void *); 813void uvm_pageout_start(int); 814void uvm_pageout_done(int); 815void uvm_estimatepageable(int *, int *); 816 817/* uvm_pglist.c */ 818int uvm_pglistalloc(psize_t, paddr_t, paddr_t, 819 paddr_t, paddr_t, struct pglist *, int, int); 820void uvm_pglistfree(struct pglist *); 821 822/* uvm_swap.c */ 823void uvm_swap_init(void); 824 825/* uvm_unix.c */ 826int uvm_grow(struct proc *, vaddr_t); 827 828/* uvm_user.c */ 829void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t); 830 831/* uvm_vnode.c */ 832struct uvm_page_array; 833void uvm_vnp_setsize(struct vnode *, voff_t); 834void uvm_vnp_setwritesize(struct vnode *, voff_t); 835int uvn_findpages(struct uvm_object *, voff_t, 836 unsigned int *, struct vm_page **, 837 struct uvm_page_array *, unsigned int); 838bool uvn_text_p(struct uvm_object *); 839bool uvn_needs_writefault_p(struct uvm_object *); 840 841/* kern_malloc.c */ 842void kmeminit_nkmempages(void); 843extern size_t nkmempages; 844 845#endif /* _KERNEL */ 846 847#endif /* _UVM_UVM_EXTERN_H_ */ 848