uvm_extern.h revision 1.224
1/* $NetBSD: uvm_extern.h,v 1.224 2020/04/23 21:47:09 ad 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#define UBC_ISMAPPED 0x008 /* object may be mapped by a process */ 230 231/* 232 * flags for ubc_release() 233 */ 234#define UBC_UNMAP 0x010 /* unmap pages now -- don't leave the 235 * mappings cached indefinitely */ 236 237/* 238 * flags for ubc_uiomove() 239 */ 240#define UBC_PARTIALOK 0x100 /* return early on error; otherwise, zero all 241 * remaining bytes after error */ 242 243/* 244 * flags for uvn_findpages(). 245 */ 246#define UFP_ALL 0x00 247#define UFP_NOWAIT 0x01 248#define UFP_NOALLOC 0x02 249#define UFP_NOCACHE 0x04 250#define UFP_NORDONLY 0x08 251#define UFP_DIRTYONLY 0x10 252#define UFP_BACKWARD 0x20 253#define UFP_NOBUSY 0x40 254 255/* 256 * lockflags that control the locking behavior of various functions. 257 */ 258#define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 259#define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 260 261/* 262 * Default number of pages to allocate on the stack 263 */ 264#define UBC_MAX_PAGES 8 265 266/* 267 * Value representing inactive emap. 268 */ 269#define UVM_EMAP_INACTIVE (0) 270 271/* 272 * structures 273 */ 274 275struct buf; 276struct core; 277struct loadavg; 278struct mount; 279struct pglist; 280struct proc; 281struct uio; 282struct uvm_object; 283struct vm_anon; 284struct vmspace; 285struct pmap; 286struct vnode; 287struct vm_map_entry; 288struct vm_map; 289struct vm_page; 290struct vmtotal; 291 292/* 293 * uvm_pctparam: parameter to be shown as percentage to user. 294 */ 295 296#define UVM_PCTPARAM_SHIFT 8 297#define UVM_PCTPARAM_SCALE (1 << UVM_PCTPARAM_SHIFT) 298#define UVM_PCTPARAM_APPLY(pct, x) \ 299 (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT) 300struct uvm_pctparam { 301 int pct_pct; /* percent [0, 100] */ /* should be the first member */ 302 int pct_scaled; 303 int (*pct_check)(struct uvm_pctparam *, int); 304}; 305 306/* 307 * uvmexp: global data structures that are exported to parts of the kernel 308 * other than the vm system. 309 */ 310 311struct uvmexp { 312 /* vm_page constants */ 313 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 314 int pagemask; /* page mask */ 315 int pageshift; /* page shift */ 316 317 /* vm_page counters */ 318 int npages; /* number of pages we manage */ 319 int free; /* number of free pages */ 320 int paging; /* number of pages in the process of being paged out */ 321 int wired; /* number of wired pages */ 322 323 /* 324 * Adding anything before this line will break binary compatibility 325 * with top(1) on NetBSD 1.5. 326 */ 327 328 int ncolors; /* number of page color buckets: must be p-o-2 */ 329 int colormask; /* color bucket mask */ 330 331 int zeropages; /* number of zero'd pages */ 332 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 333 int reserve_kernel; /* number of pages reserved for kernel */ 334 unsigned anonpages; /* number of pages used by anon mappings */ 335 unsigned filepages; /* number of pages used by cached file data */ 336 unsigned execpages; /* number of pages used by cached exec data */ 337 338 /* pageout params */ 339 int freemin; /* min number of free pages */ 340 int freetarg; /* target number of free pages */ 341 int wiredmax; /* max number of wired pages */ 342 343 /* swap */ 344 int nswapdev; /* number of configured swap devices in system */ 345 int swpages; /* number of PAGE_SIZE'ed swap pages */ 346 int swpgavail; /* number of swap pages currently available */ 347 int swpginuse; /* number of swap pages in use */ 348 int swpgonly; /* number of swap pages in use, not also in RAM */ 349 int nswget; /* number of times fault calls uvm_swap_get() */ 350 351 /* stat counters. XXX: should be 64-bit counters */ 352 int faults; /* page fault count */ 353 int traps; /* trap count */ 354 int intrs; /* interrupt count */ 355 int swtch; /* context switch count */ 356 int softs; /* software interrupt count */ 357 int syscalls; /* system calls */ 358 int pageins; /* pagein operation count */ 359 /* pageouts are in pdpageouts below */ 360 int _unused1; 361 int _unused2; 362 int pgswapin; /* pages swapped in */ 363 int pgswapout; /* pages swapped out */ 364 int forks; /* forks */ 365 int forks_ppwait; /* forks where parent waits */ 366 int forks_sharevm; /* forks where vmspace is shared */ 367 int pga_zerohit; /* pagealloc where zero wanted and zero 368 was available */ 369 int pga_zeromiss; /* pagealloc where zero wanted and zero 370 not available */ 371 int zeroaborts; /* number of times page zeroing was 372 aborted */ 373 int colorhit; /* pagealloc where we got optimal color */ 374 int colormiss; /* pagealloc where we didn't */ 375 int cpuhit; /* pagealloc where we allocated locally */ 376 int cpumiss; /* pagealloc where we didn't */ 377 378 /* fault subcounters. XXX: should be 64-bit counters */ 379 int fltnoram; /* number of times fault was out of ram */ 380 int fltnoanon; /* number of times fault was out of anons */ 381 int fltpgwait; /* number of times fault had to wait on a page */ 382 int fltpgrele; /* number of times fault found a released page */ 383 int fltrelck; /* number of times fault relock called */ 384 int fltrelckok; /* number of times fault relock is a success */ 385 int fltanget; /* number of times fault gets anon page */ 386 int fltanretry; /* number of times fault retrys an anon get */ 387 int fltamcopy; /* number of times fault clears "needs copy" */ 388 int fltnamap; /* number of times fault maps a neighbor anon page */ 389 int fltnomap; /* number of times fault maps a neighbor obj page */ 390 int fltlget; /* number of times fault does a locked pgo_get */ 391 int fltget; /* number of times fault does an unlocked get */ 392 int flt_anon; /* number of times fault anon (case 1a) */ 393 int flt_acow; /* number of times fault anon cow (case 1b) */ 394 int flt_obj; /* number of times fault is on object page (2a) */ 395 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 396 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 397 398 /* daemon counters. XXX: should be 64-bit counters */ 399 int pdwoke; /* number of times daemon woke up */ 400 int pdrevs; /* number of times daemon rev'd clock hand */ 401 int _unused3; 402 int pdfreed; /* number of pages daemon freed since boot */ 403 int pdscans; /* number of pages daemon scanned since boot */ 404 int pdanscan; /* number of anonymous pages scanned by daemon */ 405 int pdobscan; /* number of object pages scanned by daemon */ 406 int pdreact; /* number of pages daemon reactivated since boot */ 407 int pdbusy; /* number of times daemon found a busy page */ 408 int pdpageouts; /* number of times daemon started a pageout */ 409 int pdpending; /* number of times daemon got a pending pagout */ 410 int pddeact; /* number of pages daemon deactivates */ 411 int pdreanon; /* anon pages reactivated due to thresholds */ 412 int pdrefile; /* file pages reactivated due to thresholds */ 413 int pdreexec; /* executable pages reactivated due to thresholds */ 414 415 int bootpages; /* number of pages stolen at boot */ 416}; 417 418/* 419 * The following structure is 64-bit alignment safe. New elements 420 * should only be added to the end of this structure so binary 421 * compatibility can be preserved. 422 */ 423struct uvmexp_sysctl { 424 int64_t pagesize; 425 int64_t pagemask; 426 int64_t pageshift; 427 int64_t npages; 428 int64_t free; 429 int64_t active; 430 int64_t inactive; 431 int64_t paging; 432 int64_t wired; 433 int64_t zeropages; 434 int64_t reserve_pagedaemon; 435 int64_t reserve_kernel; 436 int64_t freemin; 437 int64_t freetarg; 438 int64_t inactarg; /* unused */ 439 int64_t wiredmax; 440 int64_t nswapdev; 441 int64_t swpages; 442 int64_t swpginuse; 443 int64_t swpgonly; 444 int64_t nswget; 445 int64_t unused1; /* unused; was nanon */ 446 int64_t cpuhit; 447 int64_t cpumiss; 448 int64_t faults; 449 int64_t traps; 450 int64_t intrs; 451 int64_t swtch; 452 int64_t softs; 453 int64_t syscalls; 454 int64_t pageins; 455 int64_t swapins; /* unused */ 456 int64_t swapouts; /* unused */ 457 int64_t pgswapin; /* unused */ 458 int64_t pgswapout; 459 int64_t forks; 460 int64_t forks_ppwait; 461 int64_t forks_sharevm; 462 int64_t pga_zerohit; 463 int64_t pga_zeromiss; 464 int64_t zeroaborts; 465 int64_t fltnoram; 466 int64_t fltnoanon; 467 int64_t fltpgwait; 468 int64_t fltpgrele; 469 int64_t fltrelck; 470 int64_t fltrelckok; 471 int64_t fltanget; 472 int64_t fltanretry; 473 int64_t fltamcopy; 474 int64_t fltnamap; 475 int64_t fltnomap; 476 int64_t fltlget; 477 int64_t fltget; 478 int64_t flt_anon; 479 int64_t flt_acow; 480 int64_t flt_obj; 481 int64_t flt_prcopy; 482 int64_t flt_przero; 483 int64_t pdwoke; 484 int64_t pdrevs; 485 int64_t unused4; 486 int64_t pdfreed; 487 int64_t pdscans; 488 int64_t pdanscan; 489 int64_t pdobscan; 490 int64_t pdreact; 491 int64_t pdbusy; 492 int64_t pdpageouts; 493 int64_t pdpending; 494 int64_t pddeact; 495 int64_t anonpages; 496 int64_t filepages; 497 int64_t execpages; 498 int64_t colorhit; 499 int64_t colormiss; 500 int64_t ncolors; 501 int64_t bootpages; 502 int64_t poolpages; 503 int64_t countsyncone; 504 int64_t countsyncall; 505 int64_t anonunknown; 506 int64_t anonclean; 507 int64_t anondirty; 508 int64_t fileunknown; 509 int64_t fileclean; 510 int64_t filedirty; 511 int64_t fltup; 512 int64_t fltnoup; 513}; 514 515#ifdef _KERNEL 516/* we need this before including uvm_page.h on some platforms */ 517extern struct uvmexp uvmexp; 518/* MD code needs this without including <uvm/uvm.h> */ 519extern bool vm_page_zero_enable; 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 int vm_refcnt; /* number of references * 570 * note: protected by vm_map.misc_lock */ 571 void * vm_shm; /* SYS5 shared memory private data XXX */ 572/* we copy from vm_startcopy to the end of the structure on fork */ 573#define vm_startcopy vm_rssize 574 segsz_t vm_rssize; /* current resident set size in pages */ 575 segsz_t vm_rssmax; /* max resident size in pages */ 576 segsz_t vm_tsize; /* text size (pages) XXX */ 577 segsz_t vm_dsize; /* data size (pages) XXX */ 578 segsz_t vm_ssize; /* stack size (pages) */ 579 segsz_t vm_issize; /* initial unmapped stack size (pages) */ 580 void * vm_taddr; /* user virtual address of text XXX */ 581 void * vm_daddr; /* user virtual address of data XXX */ 582 void *vm_maxsaddr; /* user VA at max stack growth */ 583 void *vm_minsaddr; /* user VA at top of stack */ 584 size_t vm_aslr_delta_mmap; /* mmap() random delta for ASLR */ 585}; 586#define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map) 587#endif 588 589#ifdef _KERNEL 590 591/* 592 * used to keep state while iterating over the map for a core dump. 593 */ 594struct uvm_coredump_state { 595 void *cookie; /* opaque for the caller */ 596 vaddr_t start; /* start of region */ 597 vaddr_t realend; /* real end of region */ 598 vaddr_t end; /* virtual end of region */ 599 vm_prot_t prot; /* protection of region */ 600 int flags; /* flags; see below */ 601}; 602 603#define UVM_COREDUMP_STACK 0x01 /* region is user stack */ 604 605/* 606 * the various kernel maps, owned by MD code 607 */ 608extern struct vm_map *kernel_map; 609extern struct vm_map *phys_map; 610 611/* 612 * uvm_voaddr: 613 * 614 * This structure encapsulates UVM's unique virtual object address 615 * for an individual byte inside a pageable page. Pageable pages can 616 * be owned by either a uvm_object (UVM_VOADDR_TYPE_OBJECT) or a 617 * vm_anon (UVM_VOADDR_TYPE_ANON). 618 * 619 * In each case, the byte offset into the owning object 620 * (uvm_object or vm_anon) is included in the ID, so that 621 * two different offsets into the same page have distinct 622 * IDs. 623 * 624 * Note that the page does not necessarily have to be resident 625 * in order to know the virtual object address. However, it 626 * is required that any pending copy-on-write is resolved. 627 * 628 * When someone wants a virtual object address, an extra reference 629 * is taken on the owner while the caller uses the ID. This 630 * ensures that the identity is stable for the duration of its 631 * use. 632 */ 633struct uvm_voaddr { 634 enum { 635 UVM_VOADDR_TYPE_OBJECT = 1, 636 UVM_VOADDR_TYPE_ANON = 2, 637 } type; 638 union { 639 struct uvm_object *uobj; 640 struct vm_anon *anon; 641 }; 642 voff_t offset; 643}; 644 645/* 646 * macros 647 */ 648 649#define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap)) 650 651 652/* vm_machdep.c */ 653int vmapbuf(struct buf *, vsize_t); 654void vunmapbuf(struct buf *, vsize_t); 655void ktext_write(void *, const void *, size_t); 656 657/* uvm_aobj.c */ 658struct uvm_object *uao_create(voff_t, int); 659void uao_set_pgfl(struct uvm_object *, int); 660void uao_detach(struct uvm_object *); 661void uao_reference(struct uvm_object *); 662 663/* uvm_bio.c */ 664void ubc_init(void); 665void ubchist_init(void); 666int ubc_uiomove(struct uvm_object *, struct uio *, vsize_t, 667 int, int); 668void ubc_zerorange(struct uvm_object *, off_t, size_t, int); 669void ubc_purge(struct uvm_object *); 670 671/* uvm_fault.c */ 672#define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0) 673int uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int); 674 /* handle a page fault */ 675 676/* uvm_glue.c */ 677#if defined(KGDB) 678void uvm_chgkprot(void *, size_t, int); 679#endif 680void uvm_proc_fork(struct proc *, struct proc *, bool); 681void uvm_lwp_fork(struct lwp *, struct lwp *, 682 void *, size_t, void (*)(void *), void *); 683int uvm_coredump_walkmap(struct proc *, 684 int (*)(struct uvm_coredump_state *), void *); 685int uvm_coredump_count_segs(struct proc *); 686void uvm_proc_exit(struct proc *); 687void uvm_lwp_exit(struct lwp *); 688void uvm_idle(void); 689void uvm_init_limits(struct proc *); 690bool uvm_kernacc(void *, size_t, vm_prot_t); 691__dead void uvm_scheduler(void); 692vaddr_t uvm_uarea_alloc(void); 693void uvm_uarea_free(vaddr_t); 694vaddr_t uvm_uarea_system_alloc(struct cpu_info *); 695void uvm_uarea_system_free(vaddr_t); 696vaddr_t uvm_lwp_getuarea(lwp_t *); 697void uvm_lwp_setuarea(lwp_t *, vaddr_t); 698int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t); 699void uvm_vsunlock(struct vmspace *, void *, size_t); 700void uvm_cpu_attach(struct cpu_info *); 701 702 703/* uvm_init.c */ 704void uvm_md_init(void); 705void uvm_init(void); 706 707/* uvm_io.c */ 708int uvm_io(struct vm_map *, struct uio *, int); 709 710/* uvm_km.c */ 711vaddr_t uvm_km_alloc(struct vm_map *, vsize_t, vsize_t, 712 uvm_flag_t); 713int uvm_km_protect(struct vm_map *, vaddr_t, vsize_t, 714 vm_prot_t); 715void uvm_km_free(struct vm_map *, vaddr_t, vsize_t, 716 uvm_flag_t); 717 718struct vm_map *uvm_km_suballoc(struct vm_map *, vaddr_t *, 719 vaddr_t *, vsize_t, int, bool, 720 struct vm_map *); 721int uvm_km_kmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, 722 vmem_addr_t *); 723void uvm_km_kmem_free(vmem_t *, vmem_addr_t, vmem_size_t); 724bool uvm_km_va_starved_p(void); 725 726/* uvm_map.c */ 727int uvm_map(struct vm_map *, vaddr_t *, vsize_t, 728 struct uvm_object *, voff_t, vsize_t, 729 uvm_flag_t); 730int uvm_map_pageable(struct vm_map *, vaddr_t, 731 vaddr_t, bool, int); 732int uvm_map_pageable_all(struct vm_map *, int, vsize_t); 733bool uvm_map_checkprot(struct vm_map *, vaddr_t, 734 vaddr_t, vm_prot_t); 735int uvm_map_protect(struct vm_map *, vaddr_t, 736 vaddr_t, vm_prot_t, bool); 737int uvm_map_protect_user(struct lwp *, vaddr_t, vaddr_t, 738 vm_prot_t); 739struct vmspace *uvmspace_alloc(vaddr_t, vaddr_t, bool); 740void uvmspace_init(struct vmspace *, struct pmap *, 741 vaddr_t, vaddr_t, bool); 742void uvmspace_exec(struct lwp *, vaddr_t, vaddr_t, bool); 743void uvmspace_spawn(struct lwp *, vaddr_t, vaddr_t, bool); 744struct vmspace *uvmspace_fork(struct vmspace *); 745void uvmspace_addref(struct vmspace *); 746void uvmspace_free(struct vmspace *); 747void uvmspace_share(struct proc *, struct proc *); 748void uvmspace_unshare(struct lwp *); 749 750bool uvm_voaddr_acquire(struct vm_map *, vaddr_t, 751 struct uvm_voaddr *); 752void uvm_voaddr_release(struct uvm_voaddr *); 753int uvm_voaddr_compare(const struct uvm_voaddr *, 754 const struct uvm_voaddr *); 755 756void uvm_whatis(uintptr_t, void (*)(const char *, ...)); 757 758/* uvm_meter.c */ 759int uvm_sysctl(int *, u_int, void *, size_t *, 760 void *, size_t, struct proc *); 761int uvm_pctparam_check(struct uvm_pctparam *, int); 762void uvm_pctparam_set(struct uvm_pctparam *, int); 763int uvm_pctparam_get(struct uvm_pctparam *); 764void uvm_pctparam_init(struct uvm_pctparam *, int, 765 int (*)(struct uvm_pctparam *, int)); 766int uvm_pctparam_createsysctlnode(struct uvm_pctparam *, 767 const char *, const char *); 768void uvm_update_uvmexp(void); 769 770/* uvm_mmap.c */ 771int uvm_mmap_dev(struct proc *, void **, size_t, dev_t, 772 off_t); 773int uvm_mmap_anon(struct proc *, void **, size_t); 774vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t, 775 int); 776 777/* uvm_mremap.c */ 778int uvm_mremap(struct vm_map *, vaddr_t, vsize_t, 779 struct vm_map *, vaddr_t *, vsize_t, 780 struct proc *, int); 781 782/* uvm_object.c */ 783void uvm_obj_init(struct uvm_object *, 784 const struct uvm_pagerops *, bool, u_int); 785void uvm_obj_setlock(struct uvm_object *, krwlock_t *); 786void uvm_obj_destroy(struct uvm_object *, bool); 787int uvm_obj_wirepages(struct uvm_object *, off_t, off_t, 788 struct pglist *); 789void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t); 790 791/* uvm_page.c */ 792int uvm_availmem(void); 793void uvm_page_numa_load(paddr_t, paddr_t, u_int); 794struct vm_page *uvm_pagealloc_strat(struct uvm_object *, 795 voff_t, struct vm_anon *, int, int, int); 796#define uvm_pagealloc(obj, off, anon, flags) \ 797 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 798 UVM_PGA_STRAT_NORMAL, 0) 799void uvm_pagereplace(struct vm_page *, 800 struct vm_page *); 801void uvm_pagerealloc(struct vm_page *, 802 struct uvm_object *, voff_t); 803void uvm_setpagesize(void); 804 805/* uvm_pager.c */ 806void uvm_aio_aiodone(struct buf *); 807void uvm_aio_aiodone_pages(struct vm_page **, int, bool, 808 int); 809 810/* uvm_pdaemon.c */ 811void uvm_pageout(void *); 812struct work; 813void uvm_aiodone_worker(struct work *, void *); 814void uvm_pageout_start(int); 815void uvm_pageout_done(int); 816void uvm_estimatepageable(int *, int *); 817 818/* uvm_pglist.c */ 819int uvm_pglistalloc(psize_t, paddr_t, paddr_t, 820 paddr_t, paddr_t, struct pglist *, int, int); 821void uvm_pglistfree(struct pglist *); 822 823/* uvm_swap.c */ 824void uvm_swap_init(void); 825 826/* uvm_unix.c */ 827int uvm_grow(struct proc *, vaddr_t); 828 829/* uvm_user.c */ 830void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t); 831 832/* uvm_vnode.c */ 833struct uvm_page_array; 834void uvm_vnp_setsize(struct vnode *, voff_t); 835void uvm_vnp_setwritesize(struct vnode *, voff_t); 836int uvn_findpages(struct uvm_object *, voff_t, 837 unsigned int *, struct vm_page **, 838 struct uvm_page_array *, unsigned int); 839bool uvn_text_p(struct uvm_object *); 840bool uvn_clean_p(struct uvm_object *); 841bool uvn_needs_writefault_p(struct uvm_object *); 842 843/* kern_malloc.c */ 844void kmeminit_nkmempages(void); 845extern int nkmempages; 846 847#endif /* _KERNEL */ 848 849#endif /* _UVM_UVM_EXTERN_H_ */ 850