1/* $NetBSD: uvm_extern.h,v 1.234.2.1 2025/11/15 10:13:25 martin 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 (((uint64_t)(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);
734struct vmspace *uvmspace_fork(struct vmspace *);
735void uvmspace_addref(struct vmspace *);
736void uvmspace_free(struct vmspace *);
737void uvmspace_share(struct proc *, struct proc *);
738void uvmspace_unshare(struct lwp *);
739
740bool uvm_voaddr_acquire(struct vm_map *, vaddr_t,
741 struct uvm_voaddr *);
742void uvm_voaddr_release(struct uvm_voaddr *);
743int uvm_voaddr_compare(const struct uvm_voaddr *,
744 const struct uvm_voaddr *);
745
746void uvm_whatis(uintptr_t, void (*)(const char *, ...));
747
748/* uvm_meter.c */
749int uvm_sysctl(int *, u_int, void *, size_t *,
750 void *, size_t, struct proc *);
751int uvm_pctparam_check(struct uvm_pctparam *, int);
752void uvm_pctparam_set(struct uvm_pctparam *, int);
753int uvm_pctparam_get(struct uvm_pctparam *);
754void uvm_pctparam_init(struct uvm_pctparam *, int,
755 int (*)(struct uvm_pctparam *, int));
756int uvm_pctparam_createsysctlnode(struct uvm_pctparam *,
757 const char *, const char *);
758void uvm_update_uvmexp(void);
759
760/* uvm_mmap.c */
761int uvm_mmap_dev(struct proc *, void **, size_t, dev_t,
762 off_t);
763int uvm_mmap_anon(struct proc *, void **, size_t);
764vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t,
765 int);
766
767/* uvm_mremap.c */
768int uvm_mremap(struct vm_map *, vaddr_t, vsize_t,
769 struct vm_map *, vaddr_t *, vsize_t,
770 struct proc *, int);
771
772/* uvm_object.c */
773void uvm_obj_init(struct uvm_object *,
774 const struct uvm_pagerops *, bool, u_int);
775void uvm_obj_setlock(struct uvm_object *, krwlock_t *);
776void uvm_obj_destroy(struct uvm_object *, bool);
777int uvm_obj_wirepages(struct uvm_object *, off_t, off_t,
778 struct pglist *);
779void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t);
780bool uvm_obj_clean_p(struct uvm_object *);
781bool uvm_obj_nowriteback_p(struct uvm_object *);
782bool uvm_obj_page_dirty_p(struct vm_page *);
783void uvm_obj_page_set_dirty(struct vm_page *);
784void uvm_obj_page_clear_dirty(struct vm_page *);
785bool uvm_obj_page_writeback_p(struct vm_page *);
786void uvm_obj_page_set_writeback(struct vm_page *);
787void uvm_obj_page_clear_writeback(struct vm_page *);
788
789/* uvm_page.c */
790int uvm_availmem(bool);
791void uvm_page_numa_load(paddr_t, paddr_t, u_int);
792struct vm_page *uvm_pagealloc_strat(struct uvm_object *,
793 voff_t, struct vm_anon *, int, int, int);
794#define uvm_pagealloc(obj, off, anon, flags) \
795 uvm_pagealloc_strat((obj), (off), (anon), (flags), \
796 UVM_PGA_STRAT_NORMAL, 0)
797void uvm_pagereplace(struct vm_page *,
798 struct vm_page *);
799int uvm_pagerealloc(struct vm_page *,
800 struct uvm_object *, voff_t);
801void uvm_setpagesize(void);
802
803/* uvm_pager.c */
804void uvm_aio_aiodone(struct buf *);
805void uvm_aio_aiodone_pages(struct vm_page **, int, bool,
806 int);
807
808/* uvm_pdaemon.c */
809void uvm_pageout(void *);
810struct work;
811void uvm_aiodone_worker(struct work *, void *);
812void uvm_pageout_start(int);
813void uvm_pageout_done(int);
814void uvm_estimatepageable(int *, int *);
815
816/* uvm_pglist.c */
817int uvm_pglistalloc(psize_t, paddr_t, paddr_t,
818 paddr_t, paddr_t, struct pglist *, int, int);
819void uvm_pglistfree(struct pglist *);
820
821/* uvm_swap.c */
822void uvm_swap_init(void);
823
824/* uvm_unix.c */
825int uvm_grow(struct proc *, vaddr_t);
826
827/* uvm_user.c */
828void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t);
829
830/* uvm_vnode.c */
831struct uvm_page_array;
832void uvm_vnp_setsize(struct vnode *, voff_t);
833void uvm_vnp_setwritesize(struct vnode *, voff_t);
834int uvn_findpages(struct uvm_object *, voff_t,
835 unsigned int *, struct vm_page **,
836 struct uvm_page_array *, unsigned int);
837bool uvn_text_p(struct uvm_object *);
838bool uvn_needs_writefault_p(struct uvm_object *);
839
840/* kern_malloc.c */
841void kmeminit_nkmempages(void);
842extern size_t nkmempages;
843
844#endif /* _KERNEL */
845
846#endif /* _UVM_UVM_EXTERN_H_ */