uvm_extern.h revision 1.176.2.11
1 /* $NetBSD: uvm_extern.h,v 1.176.2.11 2014/05/22 11:41:19 yamt 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 0x010000 /* find space */ 125 #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */ 126 #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */ 127 #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */ 128 #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce allocations */ 129 #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */ 130 #define UVM_FLAG_NOWAIT 0x400000 /* not allowed to sleep */ 131 #define UVM_FLAG_WAITVA 0x800000 /* wait for va */ 132 #define UVM_FLAG_VAONLY 0x2000000 /* unmap: no pages are mapped */ 133 #define UVM_FLAG_COLORMATCH 0x4000000 /* match color given in off */ 134 135 /* macros to extract info */ 136 #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 137 #define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 138 #define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 139 #define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 140 141 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 142 (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 143 144 /* magic offset value: offset not known(obj) or don't care(!obj) */ 145 #define UVM_UNKNOWN_OFFSET ((voff_t) -1) 146 147 /* 148 * the following defines are for uvm_km_alloc/free's flags 149 */ 150 #define UVM_KMF_WIRED 0x1 /* allocation type: wired */ 151 #define UVM_KMF_PAGEABLE 0x2 /* allocation type: pageable */ 152 #define UVM_KMF_VAONLY 0x4 /* allocation type: VA only */ 153 #define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED) 154 #define UVM_KMF_CANFAIL 0x8 /* caller handles failure */ 155 #define UVM_KMF_ZERO 0x10 /* want zero filled memory */ 156 #define UVM_KMF_EXEC 0x20 /* need executable mapping */ 157 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 158 #define UVM_KMF_NOWAIT UVM_FLAG_NOWAIT /* not allowed to sleep */ 159 #define UVM_KMF_WAITVA UVM_FLAG_WAITVA /* sleep for va */ 160 #define UVM_KMF_COLORMATCH UVM_FLAG_COLORMATCH /* start at color in align */ 161 162 /* 163 * the following defines the strategies for uvm_pagealloc_strat() 164 */ 165 #define UVM_PGA_STRAT_NORMAL 0 /* priority (low id to high) walk */ 166 #define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 167 #define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 168 169 /* 170 * flags for uvm_pagealloc_strat() 171 */ 172 #define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */ 173 #define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */ 174 175 /* 176 * flags for ubc_alloc() 177 */ 178 #define UBC_READ 0x001 179 #define UBC_WRITE 0x002 180 #define UBC_FAULTBUSY 0x004 181 182 /* 183 * flags for ubc_release() 184 */ 185 #define UBC_UNMAP 0x010 186 187 /* 188 * flags for ubc_uiomve() 189 */ 190 #define UBC_PARTIALOK 0x100 191 192 /* 193 * flags for uvn_findpages(). 194 */ 195 #define UFP_ALL 0x00 196 #define UFP_NOWAIT 0x01 197 #define UFP_NOALLOC 0x02 198 #define UFP_NOCACHE 0x04 199 #define UFP_NORDONLY 0x08 200 #define UFP_DIRTYONLY 0x10 201 #define UFP_BACKWARD 0x20 202 #define UFP_ONLYPAGER1 0x40 203 #define UFP_NOPAGER1 0x80 204 205 /* 206 * lockflags that control the locking behavior of various functions. 207 */ 208 #define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 209 #define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 210 211 /* 212 * Default number of pages to allocate on the stack 213 */ 214 #define UBC_MAX_PAGES 8 215 216 /* 217 * Value representing inactive emap. 218 */ 219 #define UVM_EMAP_INACTIVE (0) 220 221 /* 222 * structures 223 */ 224 225 struct buf; 226 struct core; 227 struct loadavg; 228 struct mount; 229 struct pglist; 230 struct proc; 231 struct uio; 232 struct uvm_object; 233 struct vm_anon; 234 struct vmspace; 235 struct pmap; 236 struct vnode; 237 struct vm_map_entry; 238 struct vm_map; 239 struct vm_page; 240 struct vmtotal; 241 242 /* 243 * uvm_pctparam: parameter to be shown as percentage to user. 244 */ 245 246 #define UVM_PCTPARAM_SHIFT 8 247 #define UVM_PCTPARAM_SCALE (1 << UVM_PCTPARAM_SHIFT) 248 #define UVM_PCTPARAM_APPLY(pct, x) \ 249 (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT) 250 struct uvm_pctparam { 251 int pct_pct; /* percent [0, 100] */ /* should be the first member */ 252 int pct_scaled; 253 int (*pct_check)(struct uvm_pctparam *, int); 254 }; 255 256 /* 257 * uvmexp: global data structures that are exported to parts of the kernel 258 * other than the vm system. 259 */ 260 261 struct uvmexp { 262 /* vm_page constants */ 263 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 264 int pagemask; /* page mask */ 265 int pageshift; /* page shift */ 266 267 /* vm_page counters */ 268 int npages; /* number of pages we manage */ 269 int free; /* number of free pages */ 270 int paging; /* number of pages in the process of being paged out */ 271 int wired; /* number of wired pages */ 272 273 /* 274 * Adding anything before this line will break binary compatibility 275 * with top(1) on NetBSD 1.5. 276 */ 277 278 int ncolors; /* number of page color buckets: must be p-o-2 */ 279 int colormask; /* color bucket mask */ 280 281 int zeropages; /* number of zero'd pages */ 282 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 283 int reserve_kernel; /* number of pages reserved for kernel */ 284 unsigned anonpages; /* number of pages used by anon mappings */ 285 unsigned filepages; /* number of pages used by cached file data */ 286 unsigned execpages; /* number of pages used by cached exec data */ 287 288 /* pageout params */ 289 int freemin; /* min number of free pages */ 290 int freetarg; /* target number of free pages */ 291 int wiredmax; /* max number of wired pages */ 292 293 /* swap */ 294 int nswapdev; /* number of configured swap devices in system */ 295 int swpages; /* number of PAGE_SIZE'ed swap pages */ 296 int swpgavail; /* number of swap pages currently available */ 297 int swpginuse; /* number of swap pages in use */ 298 int swpgonly; /* number of swap pages in use, not also in RAM */ 299 int nswget; /* number of times fault calls uvm_swap_get() */ 300 301 /* stat counters. XXX: should be 64-bit counters */ 302 int _unused_faults; /* page fault count */ 303 int _unused_traps; /* trap count */ 304 int _unused_intrs; /* interrupt count */ 305 int _unused_swtch; /* context switch count */ 306 int _unused_softs; /* software interrupt count */ 307 int _unused_syscalls; /* system calls */ 308 int pageins; /* pagein operation count */ 309 /* pageouts are in pdpageouts below */ 310 int _unused1; 311 int _unused2; 312 int pgswapin; /* pages swapped in */ 313 int pgswapout; /* pages swapped out */ 314 int forks; /* forks */ 315 int forks_ppwait; /* forks where parent waits */ 316 int forks_sharevm; /* forks where vmspace is shared */ 317 int pga_zerohit; /* pagealloc where zero wanted and zero 318 was available */ 319 int pga_zeromiss; /* pagealloc where zero wanted and zero 320 not available */ 321 int zeroaborts; /* number of times page zeroing was 322 aborted */ 323 int colorhit; /* pagealloc where we got optimal color */ 324 int colormiss; /* pagealloc where we didn't */ 325 int cpuhit; /* pagealloc where we allocated locally */ 326 int cpumiss; /* pagealloc where we didn't */ 327 328 /* fault subcounters. XXX: should be 64-bit counters */ 329 int fltnoram; /* number of times fault was out of ram */ 330 int fltnoanon; /* number of times fault was out of anons */ 331 int fltpgwait; /* number of times fault had to wait on a page */ 332 int fltpgrele; /* number of times fault found a released page */ 333 int fltrelck; /* number of times fault relock called */ 334 int fltrelckok; /* number of times fault relock is a success */ 335 int fltanget; /* number of times fault gets anon page */ 336 int fltanretry; /* number of times fault retrys an anon get */ 337 int fltamcopy; /* number of times fault clears "needs copy" */ 338 int fltnamap; /* number of times fault maps a neighbor anon page */ 339 int fltnomap; /* number of times fault maps a neighbor obj page */ 340 int fltlget; /* number of times fault does a locked pgo_get */ 341 int fltget; /* number of times fault does an unlocked get */ 342 int flt_anon; /* number of times fault anon (case 1a) */ 343 int flt_acow; /* number of times fault anon cow (case 1b) */ 344 int flt_obj; /* number of times fault is on object page (2a) */ 345 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 346 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 347 348 /* daemon counters. XXX: should be 64-bit counters */ 349 int pdwoke; /* number of times daemon woke up */ 350 int pdrevs; /* number of times daemon rev'd clock hand */ 351 int _unused3; 352 int pdfreed; /* number of pages daemon freed since boot */ 353 int pdscans; /* number of pages daemon scanned since boot */ 354 int pdanscan; /* number of anonymous pages scanned by daemon */ 355 int pdobscan; /* number of object pages scanned by daemon */ 356 int pdreact; /* number of pages daemon reactivated since boot */ 357 int pdbusy; /* number of times daemon found a busy page */ 358 int pdpageouts; /* number of times daemon started a pageout */ 359 int pdpending; /* number of times daemon got a pending pagout */ 360 int pddeact; /* number of pages daemon deactivates */ 361 int pdreanon; /* anon pages reactivated due to thresholds */ 362 int pdrefile; /* file pages reactivated due to thresholds */ 363 int pdreexec; /* executable pages reactivated due to thresholds */ 364 }; 365 366 /* 367 * The following structure is 64-bit alignment safe. New elements 368 * should only be added to the end of this structure so binary 369 * compatibility can be preserved. 370 */ 371 struct uvmexp_sysctl { 372 int64_t pagesize; 373 int64_t pagemask; 374 int64_t pageshift; 375 int64_t npages; 376 int64_t free; 377 int64_t active; 378 int64_t inactive; 379 int64_t paging; 380 int64_t wired; 381 int64_t zeropages; 382 int64_t reserve_pagedaemon; 383 int64_t reserve_kernel; 384 int64_t freemin; 385 int64_t freetarg; 386 int64_t inactarg; /* unused */ 387 int64_t wiredmax; 388 int64_t nswapdev; 389 int64_t swpages; 390 int64_t swpginuse; 391 int64_t swpgonly; 392 int64_t nswget; 393 int64_t unused1; /* unused; was nanon */ 394 int64_t cpuhit; 395 int64_t cpumiss; 396 int64_t faults; 397 int64_t traps; 398 int64_t intrs; 399 int64_t swtch; 400 int64_t softs; 401 int64_t syscalls; 402 int64_t pageins; 403 int64_t swapins; /* unused */ 404 int64_t swapouts; /* unused */ 405 int64_t pgswapin; 406 int64_t pgswapout; 407 int64_t forks; 408 int64_t forks_ppwait; 409 int64_t forks_sharevm; 410 int64_t pga_zerohit; 411 int64_t pga_zeromiss; 412 int64_t zeroaborts; 413 int64_t fltnoram; 414 int64_t fltnoanon; 415 int64_t fltpgwait; 416 int64_t fltpgrele; 417 int64_t fltrelck; 418 int64_t fltrelckok; 419 int64_t fltanget; 420 int64_t fltanretry; 421 int64_t fltamcopy; 422 int64_t fltnamap; 423 int64_t fltnomap; 424 int64_t fltlget; 425 int64_t fltget; 426 int64_t flt_anon; 427 int64_t flt_acow; 428 int64_t flt_obj; 429 int64_t flt_prcopy; 430 int64_t flt_przero; 431 int64_t pdwoke; 432 int64_t pdrevs; 433 int64_t unused4; 434 int64_t pdfreed; 435 int64_t pdscans; 436 int64_t pdanscan; 437 int64_t pdobscan; 438 int64_t pdreact; 439 int64_t pdbusy; 440 int64_t pdpageouts; 441 int64_t pdpending; 442 int64_t pddeact; 443 int64_t anonpages; 444 int64_t filepages; 445 int64_t execpages; 446 int64_t colorhit; 447 int64_t colormiss; 448 int64_t ncolors; 449 450 int64_t possiblydirtypages; 451 int64_t cleanpages; 452 int64_t dirtypages; 453 int64_t possiblydirtyanonpages; 454 int64_t cleananonpages; 455 int64_t dirtyanonpages; 456 457 int64_t loan_obj; /* O->K loan */ 458 int64_t unloan_obj; /* O->K unloan */ 459 int64_t loanbreak_obj; /* O->K loan resolved on write to O */ 460 int64_t loanfree_obj; /* O->K loan resolved on free of O */ 461 462 int64_t loan_anon; /* A->K loan */ 463 int64_t unloan_anon; /* A->K unloan */ 464 int64_t loanbreak_anon; /* A->K loan resolved on write to A */ 465 int64_t loanfree_anon; /* A->K loan resolved on free of A */ 466 467 int64_t loan_oa; /* O->A->K loan */ 468 int64_t unloan_oa; /* O->A->K unloan */ 469 470 int64_t loan_zero; /* O->K loan (zero) */ 471 int64_t unloan_zero; /* O->K unloan (zero) */ 472 473 int64_t loanbreak_orphaned; /* O->A->K loan turned into A->K loan due to 474 write to O */ 475 int64_t loanfree_orphaned; /* O->A->K loan turned into A->K loan due to 476 free of O */ 477 int64_t loanbreak_orphaned_anon; /* O->A->K loan turned into O->K loan 478 due to write to A */ 479 int64_t loanfree_orphaned_anon; /* O->A->K loan turned into O->K loan 480 due to free of A */ 481 482 int64_t loanbreak_oa_obj; /* O->A loan resolved on write to O */ 483 int64_t loanfree_oa_obj; /* O->A loan resolved on free of O */ 484 int64_t loanbreak_oa_anon; /* O->A loan resolved on write to A */ 485 int64_t loanfree_oa_anon; /* O->A loan resolved on free of A */ 486 int64_t loan_resolve_orphan; /* O->A loaned page taken over by anon */ 487 int64_t loan_obj_read; /* O->A loan for read(2) */ 488 }; 489 490 #ifdef _KERNEL 491 /* we need this before including uvm_page.h on some platforms */ 492 extern struct uvmexp uvmexp; 493 /* MD code needs this without including <uvm/uvm.h> */ 494 extern bool vm_page_zero_enable; 495 496 extern int vm_loan_read_thresh; 497 #endif 498 499 /* 500 * Finally, bring in standard UVM headers. 501 */ 502 #include <sys/vmmeter.h> 503 #include <sys/queue.h> 504 #include <sys/lock.h> 505 #ifdef _KERNEL 506 #include <sys/vmem.h> 507 #endif 508 #include <uvm/uvm_param.h> 509 #include <uvm/uvm_prot.h> 510 #include <uvm/uvm_pmap.h> 511 #include <uvm/uvm_map.h> 512 #include <uvm/uvm_pager.h> 513 514 /* 515 * helpers for calling ubc_release() 516 */ 517 #ifdef PMAP_CACHE_VIVT 518 #define UBC_WANT_UNMAP(vp) (((vp)->v_iflag & VI_TEXT) != 0) 519 #else 520 #define UBC_WANT_UNMAP(vp) false 521 #endif 522 #define UBC_UNMAP_FLAG(vp) (UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0) 523 524 /* 525 * Shareable process virtual address space. 526 * May eventually be merged with vm_map. 527 * Several fields are temporary (text, data stuff). 528 */ 529 struct vmspace { 530 struct vm_map vm_map; /* VM address map */ 531 int vm_refcnt; /* number of references * 532 * note: protected by vm_map.ref_lock */ 533 void * vm_shm; /* SYS5 shared memory private data XXX */ 534 /* we copy from vm_startcopy to the end of the structure on fork */ 535 #define vm_startcopy vm_rssize 536 segsz_t vm_rssize; /* current resident set size in pages */ 537 segsz_t vm_swrss; /* resident set size before last swap */ 538 segsz_t vm_tsize; /* text size (pages) XXX */ 539 segsz_t vm_dsize; /* data size (pages) XXX */ 540 segsz_t vm_ssize; /* stack size (pages) */ 541 segsz_t vm_issize; /* initial unmapped stack size (pages) */ 542 void * vm_taddr; /* user virtual address of text XXX */ 543 void * vm_daddr; /* user virtual address of data XXX */ 544 void *vm_maxsaddr; /* user VA at max stack growth */ 545 void *vm_minsaddr; /* user VA at top of stack */ 546 size_t vm_aslr_delta_mmap; /* mmap() random delta for ASLR */ 547 }; 548 #define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map) 549 550 #ifdef _KERNEL 551 552 /* 553 * used to keep state while iterating over the map for a core dump. 554 */ 555 struct uvm_coredump_state { 556 void *cookie; /* opaque for the caller */ 557 vaddr_t start; /* start of region */ 558 vaddr_t realend; /* real end of region */ 559 vaddr_t end; /* virtual end of region */ 560 vm_prot_t prot; /* protection of region */ 561 int flags; /* flags; see below */ 562 }; 563 564 #define UVM_COREDUMP_STACK 0x01 /* region is user stack */ 565 566 /* 567 * the various kernel maps, owned by MD code 568 */ 569 extern struct vm_map *kernel_map; 570 extern struct vm_map *phys_map; 571 572 /* 573 * macros 574 */ 575 576 #define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap)) 577 578 579 /* vm_machdep.c */ 580 int vmapbuf(struct buf *, vsize_t); 581 void vunmapbuf(struct buf *, vsize_t); 582 583 /* uvm_aobj.c */ 584 struct uvm_object *uao_create(vsize_t, int); 585 void uao_detach(struct uvm_object *); 586 void uao_reference(struct uvm_object *); 587 588 /* uvm_bio.c */ 589 void ubc_init(void); 590 void * ubc_alloc(struct uvm_object *, voff_t, vsize_t *, int, 591 int); 592 void ubc_release(void *, int); 593 int ubc_uiomove(struct uvm_object *, struct uio *, vsize_t, 594 int, int); 595 void ubc_zerorange(struct uvm_object *, off_t, size_t, int); 596 void ubc_purge(struct uvm_object *); 597 598 /* uvm_emap.c */ 599 void uvm_emap_sysinit(void); 600 #ifdef __HAVE_PMAP_EMAP 601 void uvm_emap_switch(lwp_t *); 602 #else 603 #define uvm_emap_switch(l) 604 #endif 605 606 u_int uvm_emap_gen_return(void); 607 void uvm_emap_update(u_int); 608 609 vaddr_t uvm_emap_alloc(vsize_t, bool); 610 void uvm_emap_free(vaddr_t, size_t); 611 612 void uvm_emap_enter(vaddr_t, struct vm_page **, u_int); 613 void uvm_emap_remove(vaddr_t, vsize_t); 614 615 #ifdef __HAVE_PMAP_EMAP 616 void uvm_emap_consume(u_int); 617 u_int uvm_emap_produce(void); 618 #else 619 #define uvm_emap_consume(x) 620 #define uvm_emap_produce() UVM_EMAP_INACTIVE 621 #endif 622 623 /* uvm_fault.c */ 624 #define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0) 625 int uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int); 626 /* handle a page fault */ 627 628 /* uvm_glue.c */ 629 #if defined(KGDB) 630 void uvm_chgkprot(void *, size_t, int); 631 #endif 632 void uvm_proc_fork(struct proc *, struct proc *, bool); 633 void uvm_lwp_fork(struct lwp *, struct lwp *, 634 void *, size_t, void (*)(void *), void *); 635 int uvm_coredump_walkmap(struct proc *, 636 int (*)(struct uvm_coredump_state *), void *); 637 int uvm_coredump_count_segs(struct proc *); 638 void uvm_proc_exit(struct proc *); 639 void uvm_lwp_exit(struct lwp *); 640 void uvm_init_limits(struct proc *); 641 bool uvm_kernacc(void *, size_t, vm_prot_t); 642 __dead void uvm_scheduler(void); 643 vaddr_t uvm_uarea_alloc(void); 644 void uvm_uarea_free(vaddr_t); 645 vaddr_t uvm_uarea_system_alloc(struct cpu_info *); 646 void uvm_uarea_system_free(vaddr_t); 647 vaddr_t uvm_lwp_getuarea(lwp_t *); 648 void uvm_lwp_setuarea(lwp_t *, vaddr_t); 649 int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t); 650 void uvm_vsunlock(struct vmspace *, void *, size_t); 651 void uvm_cpu_attach(struct cpu_info *); 652 653 654 /* uvm_init.c */ 655 void uvm_init(void); 656 657 /* uvm_io.c */ 658 int uvm_io(struct vm_map *, struct uio *); 659 660 /* uvm_km.c */ 661 vaddr_t uvm_km_alloc(struct vm_map *, vsize_t, vsize_t, 662 uvm_flag_t); 663 void uvm_km_free(struct vm_map *, vaddr_t, vsize_t, 664 uvm_flag_t); 665 666 struct vm_map *uvm_km_suballoc(struct vm_map *, vaddr_t *, 667 vaddr_t *, vsize_t, int, bool, 668 struct vm_map *); 669 #ifdef _KERNEL 670 int uvm_km_kmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, 671 vmem_addr_t *); 672 void uvm_km_kmem_free(vmem_t *, vmem_addr_t, vmem_size_t); 673 bool uvm_km_va_starved_p(void); 674 #endif 675 676 /* uvm_map.c */ 677 int uvm_map(struct vm_map *, vaddr_t *, vsize_t, 678 struct uvm_object *, voff_t, vsize_t, 679 uvm_flag_t); 680 int uvm_map_pageable(struct vm_map *, vaddr_t, 681 vaddr_t, bool, int); 682 int uvm_map_pageable_all(struct vm_map *, int, vsize_t); 683 bool uvm_map_checkprot(struct vm_map *, vaddr_t, 684 vaddr_t, vm_prot_t); 685 int uvm_map_protect(struct vm_map *, vaddr_t, 686 vaddr_t, vm_prot_t, bool); 687 struct vmspace *uvmspace_alloc(vaddr_t, vaddr_t, bool); 688 void uvmspace_init(struct vmspace *, struct pmap *, 689 vaddr_t, vaddr_t, bool); 690 void uvmspace_exec(struct lwp *, vaddr_t, vaddr_t, bool); 691 void uvmspace_spawn(struct lwp *, vaddr_t, vaddr_t, bool); 692 struct vmspace *uvmspace_fork(struct vmspace *); 693 void uvmspace_addref(struct vmspace *); 694 void uvmspace_free(struct vmspace *); 695 void uvmspace_share(struct proc *, struct proc *); 696 void uvmspace_unshare(struct lwp *); 697 698 void uvm_whatis(uintptr_t, void (*)(const char *, ...)); 699 700 /* uvm_meter.c */ 701 int uvm_sysctl(int *, u_int, void *, size_t *, 702 void *, size_t, struct proc *); 703 int uvm_pctparam_check(struct uvm_pctparam *, int); 704 void uvm_pctparam_set(struct uvm_pctparam *, int); 705 int uvm_pctparam_get(struct uvm_pctparam *); 706 void uvm_pctparam_init(struct uvm_pctparam *, int, 707 int (*)(struct uvm_pctparam *, int)); 708 int uvm_pctparam_createsysctlnode(struct uvm_pctparam *, 709 const char *, const char *); 710 711 /* uvm_mmap.c */ 712 int uvm_mmap(struct vm_map *, vaddr_t *, vsize_t, 713 vm_prot_t, vm_prot_t, int, 714 void *, voff_t, vsize_t); 715 vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t); 716 717 /* uvm_mremap.c */ 718 int uvm_mremap(struct vm_map *, vaddr_t, vsize_t, 719 struct vm_map *, vaddr_t *, vsize_t, 720 struct proc *, int); 721 722 /* uvm_object.c */ 723 void uvm_obj_init(struct uvm_object *, 724 const struct uvm_pagerops *, bool, u_int); 725 void uvm_obj_setlock(struct uvm_object *, kmutex_t *); 726 void uvm_obj_destroy(struct uvm_object *, bool); 727 int uvm_obj_wirepages(struct uvm_object *, off_t, off_t, 728 struct pglist *); 729 void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t); 730 731 /* uvm_page.c */ 732 struct vm_page *uvm_pagealloc_strat(struct uvm_object *, 733 voff_t, struct vm_anon *, int, int, int); 734 #define uvm_pagealloc(obj, off, anon, flags) \ 735 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 736 UVM_PGA_STRAT_NORMAL, 0) 737 void uvm_pagereplace(struct vm_page *, 738 struct vm_page *); 739 void uvm_pagerealloc(struct vm_page *, 740 struct uvm_object *, voff_t); 741 /* Actually, uvm_page_physload takes PF#s which need their own type */ 742 void uvm_page_physload(paddr_t, paddr_t, paddr_t, 743 paddr_t, int); 744 void uvm_setpagesize(void); 745 746 /* uvm_pager.c */ 747 void uvm_aio_biodone(struct buf *); 748 void uvm_aio_aiodone(struct buf *); 749 void uvm_aio_aiodone_pages(struct vm_page **, int, bool, 750 int); 751 752 /* uvm_pdaemon.c */ 753 void uvm_pageout(void *); 754 struct work; 755 void uvm_aiodone_worker(struct work *, void *); 756 void uvm_pageout_start(int); 757 void uvm_pageout_done(int); 758 void uvm_estimatepageable(int *, int *); 759 760 /* uvm_pglist.c */ 761 int uvm_pglistalloc(psize_t, paddr_t, paddr_t, 762 paddr_t, paddr_t, struct pglist *, int, int); 763 void uvm_pglistfree(struct pglist *); 764 765 /* uvm_swap.c */ 766 void uvm_swap_init(void); 767 768 /* uvm_unix.c */ 769 int uvm_grow(struct proc *, vaddr_t); 770 771 /* uvm_user.c */ 772 void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t); 773 774 /* uvm_vnode.c */ 775 struct uvm_page_array; 776 void uvm_vnp_setsize(struct vnode *, voff_t); 777 void uvm_vnp_setwritesize(struct vnode *, voff_t); 778 int uvn_findpages(struct uvm_object *, voff_t, 779 unsigned int *, struct vm_page **, 780 struct uvm_page_array *, unsigned int); 781 bool uvn_text_p(struct uvm_object *); 782 bool uvn_clean_p(struct uvm_object *); 783 bool uvn_needs_writefault_p(struct uvm_object *); 784 785 /* kern_malloc.c */ 786 void kmeminit_nkmempages(void); 787 void kmeminit(void); 788 extern int nkmempages; 789 790 #endif /* _KERNEL */ 791 792 #endif /* _UVM_UVM_EXTERN_H_ */ 793
Indexes created Wed Oct 15 07:09:58 GMT 2025