uvm_extern.h revision 1.220
1/* $NetBSD: uvm_extern.h,v 1.220 2020/02/18 20:23:17 chs 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/* 76 * defines 77 */ 78 79/* 80 * the following defines are for uvm_map and functions which call it. 81 */ 82 83/* protections bits */ 84#define UVM_PROT_MASK 0x07 /* protection mask */ 85#define UVM_PROT_NONE 0x00 /* protection none */ 86#define UVM_PROT_ALL 0x07 /* everything */ 87#define UVM_PROT_READ 0x01 /* read */ 88#define UVM_PROT_WRITE 0x02 /* write */ 89#define UVM_PROT_EXEC 0x04 /* exec */ 90 91/* protection short codes */ 92#define UVM_PROT_R 0x01 /* read */ 93#define UVM_PROT_W 0x02 /* write */ 94#define UVM_PROT_RW 0x03 /* read-write */ 95#define UVM_PROT_X 0x04 /* exec */ 96#define UVM_PROT_RX 0x05 /* read-exec */ 97#define UVM_PROT_WX 0x06 /* write-exec */ 98#define UVM_PROT_RWX 0x07 /* read-write-exec */ 99 100/* 0x08: not used */ 101 102/* inherit codes */ 103#define UVM_INH_MASK 0x30 /* inherit mask */ 104#define UVM_INH_SHARE 0x00 /* "share" */ 105#define UVM_INH_COPY 0x10 /* "copy" */ 106#define UVM_INH_NONE 0x20 /* "none" */ 107#define UVM_INH_DONATE 0x30 /* "donate" << not used */ 108 109/* 0x40, 0x80: not used */ 110 111/* bits 0x700: max protection, 0x800: not used */ 112 113/* bits 0x7000: advice, 0x8000: not used */ 114/* advice: matches MADV_* from sys/mman.h and POSIX_FADV_* from sys/fcntl.h */ 115#define UVM_ADV_NORMAL 0x0 /* 'normal' */ 116#define UVM_ADV_RANDOM 0x1 /* 'random' */ 117#define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */ 118#define UVM_ADV_WILLNEED 0x3 /* pages will be needed */ 119#define UVM_ADV_DONTNEED 0x4 /* pages won't be needed */ 120#define UVM_ADV_NOREUSE 0x5 /* pages will be used only once */ 121#define UVM_ADV_MASK 0x7 /* mask */ 122 123/* bits 0xffff0000: mapping flags */ 124#define UVM_FLAG_FIXED 0x00010000 /* find space */ 125#define UVM_FLAG_OVERLAY 0x00020000 /* establish overlay */ 126#define UVM_FLAG_NOMERGE 0x00040000 /* don't merge map entries */ 127#define UVM_FLAG_COPYONW 0x00080000 /* set copy_on_write flag */ 128#define UVM_FLAG_AMAPPAD 0x00100000 /* for bss: pad amap */ 129#define UVM_FLAG_TRYLOCK 0x00200000 /* fail if we can not lock map */ 130#define UVM_FLAG_NOWAIT 0x00400000 /* not allowed to sleep */ 131#define UVM_FLAG_WAITVA 0x00800000 /* wait for va */ 132#define UVM_FLAG_VAONLY 0x02000000 /* unmap: no pages are mapped */ 133#define UVM_FLAG_COLORMATCH 0x04000000 /* match color given in off */ 134#define UVM_FLAG_UNMAP 0x08000000 /* unmap existing entries */ 135 136#define UVM_FLAG_BITS "\177\020\ 137F\0\3\ 138:\0PROT=NONE\0\ 139:\1PROT=R\0\ 140:\2PROT=W\0\ 141:\3PROT=RW\0\ 142:\4PROT=X\0\ 143:\5PROT=RX\0\ 144:\6PROT=WX\0\ 145:\7PROT=RWX\0\ 146F\4\2\ 147:\0INH=SHARE\0\ 148:\1INH=COPY\0\ 149:\2INH=NONE\0\ 150:\3INH=DONATE\0\ 151F\10\3\ 152:\0MAXPROT=NONE\0\ 153:\1MAXPROT=R\0\ 154:\2MAXPROT=W\0\ 155:\3MAXPROT=RW\0\ 156:\4MAXPROT=X\0\ 157:\5MAXPROT=RX\0\ 158:\6MAXPROT=WX\0\ 159:\7MAXPROT=RWX\0\ 160F\14\3\ 161:\0ADV=NORMAL\0\ 162:\1ADV=RANDOM\0\ 163:\2ADV=SEQUENTIAL\0\ 164:\3ADV=WILLNEED\0\ 165:\4ADV=DONTNEED\0\ 166:\5ADV=NOREUSE\0\ 167b\20FIXED\0\ 168b\21OVERLAY\0\ 169b\22NOMERGE\0\ 170b\23COPYONW\0\ 171b\24AMAPPAD\0\ 172b\25TRYLOCK\0\ 173b\26NOWAIT\0\ 174b\27WAITVA\0\ 175b\30VAONLY\0\ 176b\31COLORMATCH\0\ 177b\32UNMAP\0\ 178" 179 180/* macros to extract info */ 181#define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 182#define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 183#define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 184#define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 185 186#define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 187 (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 188 189/* magic offset value: offset not known(obj) or don't care(!obj) */ 190#define UVM_UNKNOWN_OFFSET ((voff_t) -1) 191 192/* 193 * the following defines are for uvm_km_alloc/free's flags 194 */ 195#define UVM_KMF_WIRED 0x1 /* allocation type: wired */ 196#define UVM_KMF_PAGEABLE 0x2 /* allocation type: pageable */ 197#define UVM_KMF_VAONLY 0x4 /* allocation type: VA only */ 198#define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED) 199#define UVM_KMF_CANFAIL 0x8 /* caller handles failure */ 200#define UVM_KMF_ZERO 0x10 /* want zero filled memory */ 201#define UVM_KMF_EXEC 0x20 /* need executable mapping */ 202#define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 203#define UVM_KMF_NOWAIT UVM_FLAG_NOWAIT /* not allowed to sleep */ 204#define UVM_KMF_WAITVA UVM_FLAG_WAITVA /* sleep for va */ 205#define UVM_KMF_COLORMATCH UVM_FLAG_COLORMATCH /* start at color in align */ 206 207/* 208 * the following defines the strategies for uvm_pagealloc_strat() 209 */ 210#define UVM_PGA_STRAT_NORMAL 0 /* priority (low id to high) walk */ 211#define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 212#define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 213#define UVM_PGA_STRAT_NUMA 3 /* strongly prefer ideal bucket */ 214 215/* 216 * flags for uvm_pagealloc_strat() 217 */ 218#define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */ 219#define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */ 220 221/* 222 * flags for ubc_uiomove() 223 */ 224#define UBC_READ 0x001 /* reading from object */ 225#define UBC_WRITE 0x002 /* writing to object */ 226#define UBC_FAULTBUSY 0x004 /* nobody else is using these pages, so busy 227 * them at alloc and unbusy at release (e.g., 228 * for writes extending a file) */ 229 230/* 231 * flags for ubc_release() 232 */ 233#define UBC_UNMAP 0x010 /* unmap pages now -- don't leave the 234 * mappings cached indefinitely */ 235 236/* 237 * flags for ubc_uiomove() 238 */ 239#define UBC_PARTIALOK 0x100 /* return early on error; otherwise, zero all 240 * remaining bytes after error */ 241 242/* 243 * flags for uvn_findpages(). 244 */ 245#define UFP_ALL 0x00 246#define UFP_NOWAIT 0x01 247#define UFP_NOALLOC 0x02 248#define UFP_NOCACHE 0x04 249#define UFP_NORDONLY 0x08 250#define UFP_DIRTYONLY 0x10 251#define UFP_BACKWARD 0x20 252 253/* 254 * lockflags that control the locking behavior of various functions. 255 */ 256#define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 257#define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 258 259/* 260 * Default number of pages to allocate on the stack 261 */ 262#define UBC_MAX_PAGES 8 263 264/* 265 * Value representing inactive emap. 266 */ 267#define UVM_EMAP_INACTIVE (0) 268 269/* 270 * structures 271 */ 272 273struct buf; 274struct core; 275struct loadavg; 276struct mount; 277struct pglist; 278struct proc; 279struct uio; 280struct uvm_object; 281struct vm_anon; 282struct vmspace; 283struct pmap; 284struct vnode; 285struct vm_map_entry; 286struct vm_map; 287struct vm_page; 288struct vmtotal; 289 290/* 291 * uvm_pctparam: parameter to be shown as percentage to user. 292 */ 293 294#define UVM_PCTPARAM_SHIFT 8 295#define UVM_PCTPARAM_SCALE (1 << UVM_PCTPARAM_SHIFT) 296#define UVM_PCTPARAM_APPLY(pct, x) \ 297 (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT) 298struct uvm_pctparam { 299 int pct_pct; /* percent [0, 100] */ /* should be the first member */ 300 int pct_scaled; 301 int (*pct_check)(struct uvm_pctparam *, int); 302}; 303 304/* 305 * uvmexp: global data structures that are exported to parts of the kernel 306 * other than the vm system. 307 */ 308 309struct uvmexp { 310 /* vm_page constants */ 311 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 312 int pagemask; /* page mask */ 313 int pageshift; /* page shift */ 314 315 /* vm_page counters */ 316 int npages; /* number of pages we manage */ 317 int free; /* number of free pages */ 318 int paging; /* number of pages in the process of being paged out */ 319 int wired; /* number of wired pages */ 320 321 /* 322 * Adding anything before this line will break binary compatibility 323 * with top(1) on NetBSD 1.5. 324 */ 325 326 int ncolors; /* number of page color buckets: must be p-o-2 */ 327 int colormask; /* color bucket mask */ 328 329 int zeropages; /* number of zero'd pages */ 330 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 331 int reserve_kernel; /* number of pages reserved for kernel */ 332 unsigned anonpages; /* number of pages used by anon mappings */ 333 unsigned filepages; /* number of pages used by cached file data */ 334 unsigned execpages; /* number of pages used by cached exec data */ 335 336 /* pageout params */ 337 int freemin; /* min number of free pages */ 338 int freetarg; /* target number of free pages */ 339 int wiredmax; /* max number of wired pages */ 340 341 /* swap */ 342 int nswapdev; /* number of configured swap devices in system */ 343 int swpages; /* number of PAGE_SIZE'ed swap pages */ 344 int swpgavail; /* number of swap pages currently available */ 345 int swpginuse; /* number of swap pages in use */ 346 int swpgonly; /* number of swap pages in use, not also in RAM */ 347 int nswget; /* number of times fault calls uvm_swap_get() */ 348 349 /* stat counters. XXX: should be 64-bit counters */ 350 int faults; /* page fault count */ 351 int traps; /* trap count */ 352 int intrs; /* interrupt count */ 353 int swtch; /* context switch count */ 354 int softs; /* software interrupt count */ 355 int syscalls; /* system calls */ 356 int pageins; /* pagein operation count */ 357 /* pageouts are in pdpageouts below */ 358 int _unused1; 359 int _unused2; 360 int pgswapin; /* pages swapped in */ 361 int pgswapout; /* pages swapped out */ 362 int forks; /* forks */ 363 int forks_ppwait; /* forks where parent waits */ 364 int forks_sharevm; /* forks where vmspace is shared */ 365 int pga_zerohit; /* pagealloc where zero wanted and zero 366 was available */ 367 int pga_zeromiss; /* pagealloc where zero wanted and zero 368 not available */ 369 int zeroaborts; /* number of times page zeroing was 370 aborted */ 371 int colorhit; /* pagealloc where we got optimal color */ 372 int colormiss; /* pagealloc where we didn't */ 373 int cpuhit; /* pagealloc where we allocated locally */ 374 int cpumiss; /* pagealloc where we didn't */ 375 376 /* fault subcounters. XXX: should be 64-bit counters */ 377 int fltnoram; /* number of times fault was out of ram */ 378 int fltnoanon; /* number of times fault was out of anons */ 379 int fltpgwait; /* number of times fault had to wait on a page */ 380 int fltpgrele; /* number of times fault found a released page */ 381 int fltrelck; /* number of times fault relock called */ 382 int fltrelckok; /* number of times fault relock is a success */ 383 int fltanget; /* number of times fault gets anon page */ 384 int fltanretry; /* number of times fault retrys an anon get */ 385 int fltamcopy; /* number of times fault clears "needs copy" */ 386 int fltnamap; /* number of times fault maps a neighbor anon page */ 387 int fltnomap; /* number of times fault maps a neighbor obj page */ 388 int fltlget; /* number of times fault does a locked pgo_get */ 389 int fltget; /* number of times fault does an unlocked get */ 390 int flt_anon; /* number of times fault anon (case 1a) */ 391 int flt_acow; /* number of times fault anon cow (case 1b) */ 392 int flt_obj; /* number of times fault is on object page (2a) */ 393 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 394 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 395 396 /* daemon counters. XXX: should be 64-bit counters */ 397 int pdwoke; /* number of times daemon woke up */ 398 int pdrevs; /* number of times daemon rev'd clock hand */ 399 int _unused3; 400 int pdfreed; /* number of pages daemon freed since boot */ 401 int pdscans; /* number of pages daemon scanned since boot */ 402 int pdanscan; /* number of anonymous pages scanned by daemon */ 403 int pdobscan; /* number of object pages scanned by daemon */ 404 int pdreact; /* number of pages daemon reactivated since boot */ 405 int pdbusy; /* number of times daemon found a busy page */ 406 int pdpageouts; /* number of times daemon started a pageout */ 407 int pdpending; /* number of times daemon got a pending pagout */ 408 int pddeact; /* number of pages daemon deactivates */ 409 int pdreanon; /* anon pages reactivated due to thresholds */ 410 int pdrefile; /* file pages reactivated due to thresholds */ 411 int pdreexec; /* executable pages reactivated due to thresholds */ 412 413 int bootpages; /* number of pages stolen at boot */ 414}; 415 416/* 417 * The following structure is 64-bit alignment safe. New elements 418 * should only be added to the end of this structure so binary 419 * compatibility can be preserved. 420 */ 421struct uvmexp_sysctl { 422 int64_t pagesize; 423 int64_t pagemask; 424 int64_t pageshift; 425 int64_t npages; 426 int64_t free; 427 int64_t active; 428 int64_t inactive; 429 int64_t paging; 430 int64_t wired; 431 int64_t zeropages; 432 int64_t reserve_pagedaemon; 433 int64_t reserve_kernel; 434 int64_t freemin; 435 int64_t freetarg; 436 int64_t inactarg; /* unused */ 437 int64_t wiredmax; 438 int64_t nswapdev; 439 int64_t swpages; 440 int64_t swpginuse; 441 int64_t swpgonly; 442 int64_t nswget; 443 int64_t unused1; /* unused; was nanon */ 444 int64_t cpuhit; 445 int64_t cpumiss; 446 int64_t faults; 447 int64_t traps; 448 int64_t intrs; 449 int64_t swtch; 450 int64_t softs; 451 int64_t syscalls; 452 int64_t pageins; 453 int64_t swapins; /* unused */ 454 int64_t swapouts; /* unused */ 455 int64_t pgswapin; /* unused */ 456 int64_t pgswapout; 457 int64_t forks; 458 int64_t forks_ppwait; 459 int64_t forks_sharevm; 460 int64_t pga_zerohit; 461 int64_t pga_zeromiss; 462 int64_t zeroaborts; 463 int64_t fltnoram; 464 int64_t fltnoanon; 465 int64_t fltpgwait; 466 int64_t fltpgrele; 467 int64_t fltrelck; 468 int64_t fltrelckok; 469 int64_t fltanget; 470 int64_t fltanretry; 471 int64_t fltamcopy; 472 int64_t fltnamap; 473 int64_t fltnomap; 474 int64_t fltlget; 475 int64_t fltget; 476 int64_t flt_anon; 477 int64_t flt_acow; 478 int64_t flt_obj; 479 int64_t flt_prcopy; 480 int64_t flt_przero; 481 int64_t pdwoke; 482 int64_t pdrevs; 483 int64_t unused4; 484 int64_t pdfreed; 485 int64_t pdscans; 486 int64_t pdanscan; 487 int64_t pdobscan; 488 int64_t pdreact; 489 int64_t pdbusy; 490 int64_t pdpageouts; 491 int64_t pdpending; 492 int64_t pddeact; 493 int64_t anonpages; 494 int64_t filepages; 495 int64_t execpages; 496 int64_t colorhit; 497 int64_t colormiss; 498 int64_t ncolors; 499 int64_t bootpages; 500 int64_t poolpages; 501 int64_t countsyncone; 502 int64_t countsyncall; 503 int64_t anonunknown; 504 int64_t anonclean; 505 int64_t anondirty; 506 int64_t fileunknown; 507 int64_t fileclean; 508 int64_t filedirty; 509}; 510 511#ifdef _KERNEL 512/* we need this before including uvm_page.h on some platforms */ 513extern struct uvmexp uvmexp; 514/* MD code needs this without including <uvm/uvm.h> */ 515extern bool vm_page_zero_enable; 516#endif 517 518/* 519 * Finally, bring in standard UVM headers. 520 */ 521#include <sys/vmmeter.h> 522#include <sys/queue.h> 523#include <sys/lock.h> 524#ifdef _KERNEL 525#include <sys/vmem.h> 526#endif 527#include <uvm/uvm_param.h> 528#include <uvm/uvm_prot.h> 529#include <uvm/uvm_pmap.h> 530#if defined(_KERNEL) || defined(_KMEMUSER) 531#include <uvm/uvm_map.h> 532#include <uvm/uvm_pager.h> 533#endif 534 535#ifdef _KERNEL 536/* 537 * Include the uvm_hotplug(9) API unconditionally until 538 * uvm_page_physload() et. al. are obsoleted 539 * 540 * After this, MD code will have to explicitly include it if needed. 541 */ 542#include <uvm/uvm_physseg.h> 543#endif 544 545/* 546 * helpers for calling ubc_release() 547 */ 548#ifdef PMAP_CACHE_VIVT 549#define UBC_WANT_UNMAP(vp) (((vp)->v_iflag & VI_TEXT) != 0) 550#else 551#define UBC_WANT_UNMAP(vp) false 552#endif 553#define UBC_UNMAP_FLAG(vp) (UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0) 554 555#if defined(_KERNEL) || defined(_KMEMUSER) 556/* 557 * Shareable process virtual address space. 558 * May eventually be merged with vm_map. 559 * Several fields are temporary (text, data stuff). 560 */ 561struct vmspace { 562 struct vm_map vm_map; /* VM address map */ 563 int vm_refcnt; /* number of references * 564 * note: protected by vm_map.misc_lock */ 565 void * vm_shm; /* SYS5 shared memory private data XXX */ 566/* we copy from vm_startcopy to the end of the structure on fork */ 567#define vm_startcopy vm_rssize 568 segsz_t vm_rssize; /* current resident set size in pages */ 569 segsz_t vm_rssmax; /* max resident size in pages */ 570 segsz_t vm_tsize; /* text size (pages) XXX */ 571 segsz_t vm_dsize; /* data size (pages) XXX */ 572 segsz_t vm_ssize; /* stack size (pages) */ 573 segsz_t vm_issize; /* initial unmapped stack size (pages) */ 574 void * vm_taddr; /* user virtual address of text XXX */ 575 void * vm_daddr; /* user virtual address of data XXX */ 576 void *vm_maxsaddr; /* user VA at max stack growth */ 577 void *vm_minsaddr; /* user VA at top of stack */ 578 size_t vm_aslr_delta_mmap; /* mmap() random delta for ASLR */ 579}; 580#define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map) 581#endif 582 583#ifdef _KERNEL 584 585/* 586 * used to keep state while iterating over the map for a core dump. 587 */ 588struct uvm_coredump_state { 589 void *cookie; /* opaque for the caller */ 590 vaddr_t start; /* start of region */ 591 vaddr_t realend; /* real end of region */ 592 vaddr_t end; /* virtual end of region */ 593 vm_prot_t prot; /* protection of region */ 594 int flags; /* flags; see below */ 595}; 596 597#define UVM_COREDUMP_STACK 0x01 /* region is user stack */ 598 599/* 600 * the various kernel maps, owned by MD code 601 */ 602extern struct vm_map *kernel_map; 603extern struct vm_map *phys_map; 604 605/* 606 * macros 607 */ 608 609#define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap)) 610 611 612/* vm_machdep.c */ 613int vmapbuf(struct buf *, vsize_t); 614void vunmapbuf(struct buf *, vsize_t); 615void ktext_write(void *, const void *, size_t); 616 617/* uvm_aobj.c */ 618struct uvm_object *uao_create(voff_t, int); 619void uao_set_pgfl(struct uvm_object *, int); 620void uao_detach(struct uvm_object *); 621void uao_reference(struct uvm_object *); 622 623/* uvm_bio.c */ 624void ubc_init(void); 625void ubchist_init(void); 626int ubc_uiomove(struct uvm_object *, struct uio *, vsize_t, 627 int, int); 628void ubc_zerorange(struct uvm_object *, off_t, size_t, int); 629void ubc_purge(struct uvm_object *); 630 631/* uvm_fault.c */ 632#define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0) 633int uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int); 634 /* handle a page fault */ 635 636/* uvm_glue.c */ 637#if defined(KGDB) 638void uvm_chgkprot(void *, size_t, int); 639#endif 640void uvm_proc_fork(struct proc *, struct proc *, bool); 641void uvm_lwp_fork(struct lwp *, struct lwp *, 642 void *, size_t, void (*)(void *), void *); 643int uvm_coredump_walkmap(struct proc *, 644 int (*)(struct uvm_coredump_state *), void *); 645int uvm_coredump_count_segs(struct proc *); 646void uvm_proc_exit(struct proc *); 647void uvm_lwp_exit(struct lwp *); 648void uvm_idle(void); 649void uvm_init_limits(struct proc *); 650bool uvm_kernacc(void *, size_t, vm_prot_t); 651__dead void uvm_scheduler(void); 652vaddr_t uvm_uarea_alloc(void); 653void uvm_uarea_free(vaddr_t); 654vaddr_t uvm_uarea_system_alloc(struct cpu_info *); 655void uvm_uarea_system_free(vaddr_t); 656vaddr_t uvm_lwp_getuarea(lwp_t *); 657void uvm_lwp_setuarea(lwp_t *, vaddr_t); 658int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t); 659void uvm_vsunlock(struct vmspace *, void *, size_t); 660void uvm_cpu_attach(struct cpu_info *); 661 662 663/* uvm_init.c */ 664void uvm_md_init(void); 665void uvm_init(void); 666 667/* uvm_io.c */ 668int uvm_io(struct vm_map *, struct uio *, int); 669 670/* uvm_km.c */ 671vaddr_t uvm_km_alloc(struct vm_map *, vsize_t, vsize_t, 672 uvm_flag_t); 673int uvm_km_protect(struct vm_map *, vaddr_t, vsize_t, 674 vm_prot_t); 675void uvm_km_free(struct vm_map *, vaddr_t, vsize_t, 676 uvm_flag_t); 677 678struct vm_map *uvm_km_suballoc(struct vm_map *, vaddr_t *, 679 vaddr_t *, vsize_t, int, bool, 680 struct vm_map *); 681int uvm_km_kmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, 682 vmem_addr_t *); 683void uvm_km_kmem_free(vmem_t *, vmem_addr_t, vmem_size_t); 684bool uvm_km_va_starved_p(void); 685 686/* uvm_map.c */ 687int uvm_map(struct vm_map *, vaddr_t *, vsize_t, 688 struct uvm_object *, voff_t, vsize_t, 689 uvm_flag_t); 690int uvm_map_pageable(struct vm_map *, vaddr_t, 691 vaddr_t, bool, int); 692int uvm_map_pageable_all(struct vm_map *, int, vsize_t); 693bool uvm_map_checkprot(struct vm_map *, vaddr_t, 694 vaddr_t, vm_prot_t); 695int uvm_map_protect(struct vm_map *, vaddr_t, 696 vaddr_t, vm_prot_t, bool); 697int uvm_map_protect_user(struct lwp *, vaddr_t, vaddr_t, 698 vm_prot_t); 699struct vmspace *uvmspace_alloc(vaddr_t, vaddr_t, bool); 700void uvmspace_init(struct vmspace *, struct pmap *, 701 vaddr_t, vaddr_t, bool); 702void uvmspace_exec(struct lwp *, vaddr_t, vaddr_t, bool); 703void uvmspace_spawn(struct lwp *, vaddr_t, vaddr_t, bool); 704struct vmspace *uvmspace_fork(struct vmspace *); 705void uvmspace_addref(struct vmspace *); 706void uvmspace_free(struct vmspace *); 707void uvmspace_share(struct proc *, struct proc *); 708void uvmspace_unshare(struct lwp *); 709 710void uvm_whatis(uintptr_t, void (*)(const char *, ...)); 711 712/* uvm_meter.c */ 713int uvm_sysctl(int *, u_int, void *, size_t *, 714 void *, size_t, struct proc *); 715int uvm_pctparam_check(struct uvm_pctparam *, int); 716void uvm_pctparam_set(struct uvm_pctparam *, int); 717int uvm_pctparam_get(struct uvm_pctparam *); 718void uvm_pctparam_init(struct uvm_pctparam *, int, 719 int (*)(struct uvm_pctparam *, int)); 720int uvm_pctparam_createsysctlnode(struct uvm_pctparam *, 721 const char *, const char *); 722void uvm_update_uvmexp(void); 723 724/* uvm_mmap.c */ 725int uvm_mmap_dev(struct proc *, void **, size_t, dev_t, 726 off_t); 727int uvm_mmap_anon(struct proc *, void **, size_t); 728vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t, 729 int); 730 731/* uvm_mremap.c */ 732int uvm_mremap(struct vm_map *, vaddr_t, vsize_t, 733 struct vm_map *, vaddr_t *, vsize_t, 734 struct proc *, int); 735 736/* uvm_object.c */ 737void uvm_obj_init(struct uvm_object *, 738 const struct uvm_pagerops *, bool, u_int); 739void uvm_obj_setlock(struct uvm_object *, kmutex_t *); 740void uvm_obj_destroy(struct uvm_object *, bool); 741int uvm_obj_wirepages(struct uvm_object *, off_t, off_t, 742 struct pglist *); 743void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t); 744 745/* uvm_page.c */ 746int uvm_availmem(void); 747void uvm_page_numa_load(paddr_t, paddr_t, u_int); 748struct vm_page *uvm_pagealloc_strat(struct uvm_object *, 749 voff_t, struct vm_anon *, int, int, int); 750#define uvm_pagealloc(obj, off, anon, flags) \ 751 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 752 UVM_PGA_STRAT_NORMAL, 0) 753void uvm_pagereplace(struct vm_page *, 754 struct vm_page *); 755void uvm_pagerealloc(struct vm_page *, 756 struct uvm_object *, voff_t); 757void uvm_setpagesize(void); 758 759/* uvm_pager.c */ 760void uvm_aio_aiodone(struct buf *); 761void uvm_aio_aiodone_pages(struct vm_page **, int, bool, 762 int); 763 764/* uvm_pdaemon.c */ 765void uvm_pageout(void *); 766struct work; 767void uvm_aiodone_worker(struct work *, void *); 768void uvm_pageout_start(int); 769void uvm_pageout_done(int); 770void uvm_estimatepageable(int *, int *); 771 772/* uvm_pglist.c */ 773int uvm_pglistalloc(psize_t, paddr_t, paddr_t, 774 paddr_t, paddr_t, struct pglist *, int, int); 775void uvm_pglistfree(struct pglist *); 776 777/* uvm_swap.c */ 778void uvm_swap_init(void); 779 780/* uvm_unix.c */ 781int uvm_grow(struct proc *, vaddr_t); 782 783/* uvm_user.c */ 784void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t); 785 786/* uvm_vnode.c */ 787struct uvm_page_array; 788void uvm_vnp_setsize(struct vnode *, voff_t); 789void uvm_vnp_setwritesize(struct vnode *, voff_t); 790int uvn_findpages(struct uvm_object *, voff_t, 791 unsigned int *, struct vm_page **, 792 struct uvm_page_array *, unsigned int); 793bool uvn_text_p(struct uvm_object *); 794bool uvn_clean_p(struct uvm_object *); 795bool uvn_needs_writefault_p(struct uvm_object *); 796 797/* kern_malloc.c */ 798void kmeminit_nkmempages(void); 799extern int nkmempages; 800 801#endif /* _KERNEL */ 802 803#endif /* _UVM_UVM_EXTERN_H_ */ 804