uvm_extern.h revision 1.205
1 /* $NetBSD: uvm_extern.h,v 1.205 2017/05/17 22:43:12 christos 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 #define UVM_FLAG_BITS "\177\020\ 136 F\0\3\ 137 :\0PROT=NONE\0\ 138 :\1PROT=R\0\ 139 :\2PROT=W\0\ 140 :\3PROT=RW\0\ 141 :\4PROT=X\0\ 142 :\5PROT=RX\0\ 143 :\6PROT=WX\0\ 144 :\7PROT=RWX\0\ 145 F\4\2\ 146 :\0INH=SHARE\0\ 147 :\1INH=COPY\0\ 148 :\2INH=NONE\0\ 149 :\3INH=DONATE\0\ 150 F\10\3\ 151 :\0MAXPROT=NONE\0\ 152 :\1MAXPROT=R\0\ 153 :\2MAXPROT=W\0\ 154 :\3MAXPROT=RW\0\ 155 :\4MAXPROT=X\0\ 156 :\5MAXPROT=RX\0\ 157 :\6MAXPROT=WX\0\ 158 :\7MAXPROT=RWX\0\ 159 F\14\3\ 160 :\0ADV=NORMAL\0\ 161 :\1ADV=RANDOM\0\ 162 :\2ADV=SEQUENTIAL\0\ 163 :\3ADV=WILLNEED\0\ 164 :\4ADV=DONTNEED\0\ 165 :\5ADV=NOREUSE\0\ 166 b\20FIXED\0\ 167 b\21OVERLAY\0\ 168 b\22NOMERGE\0\ 169 b\23COPYONW\0\ 170 b\24AMAPPAD\0\ 171 b\25TRYLOCK\0\ 172 b\26NOWAIT\0\ 173 b\27WAITVA\0\ 174 b\30VAONLY\0\ 175 b\31COLORMATCH\0" 176 177 /* macros to extract info */ 178 #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 179 #define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 180 #define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 181 #define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 182 183 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 184 (((MAXPROT) << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 185 186 /* magic offset value: offset not known(obj) or don't care(!obj) */ 187 #define UVM_UNKNOWN_OFFSET ((voff_t) -1) 188 189 /* 190 * the following defines are for uvm_km_alloc/free's flags 191 */ 192 #define UVM_KMF_WIRED 0x1 /* allocation type: wired */ 193 #define UVM_KMF_PAGEABLE 0x2 /* allocation type: pageable */ 194 #define UVM_KMF_VAONLY 0x4 /* allocation type: VA only */ 195 #define UVM_KMF_TYPEMASK (UVM_KMF_VAONLY | UVM_KMF_PAGEABLE | UVM_KMF_WIRED) 196 #define UVM_KMF_CANFAIL 0x8 /* caller handles failure */ 197 #define UVM_KMF_ZERO 0x10 /* want zero filled memory */ 198 #define UVM_KMF_EXEC 0x20 /* need executable mapping */ 199 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 200 #define UVM_KMF_NOWAIT UVM_FLAG_NOWAIT /* not allowed to sleep */ 201 #define UVM_KMF_WAITVA UVM_FLAG_WAITVA /* sleep for va */ 202 #define UVM_KMF_COLORMATCH UVM_FLAG_COLORMATCH /* start at color in align */ 203 204 /* 205 * the following defines the strategies for uvm_pagealloc_strat() 206 */ 207 #define UVM_PGA_STRAT_NORMAL 0 /* priority (low id to high) walk */ 208 #define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 209 #define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 210 211 /* 212 * flags for uvm_pagealloc_strat() 213 */ 214 #define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */ 215 #define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */ 216 217 /* 218 * flags for ubc_alloc() 219 */ 220 #define UBC_READ 0x001 /* reading from object */ 221 #define UBC_WRITE 0x002 /* writing to object */ 222 #define UBC_FAULTBUSY 0x004 /* nobody else is using these pages, so busy 223 * them at alloc and unbusy at release (e.g., 224 * for writes extending a file) */ 225 226 /* 227 * flags for ubc_release() 228 */ 229 #define UBC_UNMAP 0x010 /* unmap pages now -- don't leave the 230 * mappings cached indefinitely */ 231 232 /* 233 * flags for ubc_uiomove() 234 */ 235 #define UBC_PARTIALOK 0x100 /* return early on error; otherwise, zero all 236 * remaining bytes after error */ 237 238 /* 239 * flags for uvn_findpages(). 240 */ 241 #define UFP_ALL 0x00 242 #define UFP_NOWAIT 0x01 243 #define UFP_NOALLOC 0x02 244 #define UFP_NOCACHE 0x04 245 #define UFP_NORDONLY 0x08 246 #define UFP_DIRTYONLY 0x10 247 #define UFP_BACKWARD 0x20 248 249 /* 250 * lockflags that control the locking behavior of various functions. 251 */ 252 #define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 253 #define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 254 255 /* 256 * Default number of pages to allocate on the stack 257 */ 258 #define UBC_MAX_PAGES 8 259 260 /* 261 * Value representing inactive emap. 262 */ 263 #define UVM_EMAP_INACTIVE (0) 264 265 /* 266 * structures 267 */ 268 269 struct buf; 270 struct core; 271 struct loadavg; 272 struct mount; 273 struct pglist; 274 struct proc; 275 struct uio; 276 struct uvm_object; 277 struct vm_anon; 278 struct vmspace; 279 struct pmap; 280 struct vnode; 281 struct vm_map_entry; 282 struct vm_map; 283 struct vm_page; 284 struct vmtotal; 285 286 /* 287 * uvm_pctparam: parameter to be shown as percentage to user. 288 */ 289 290 #define UVM_PCTPARAM_SHIFT 8 291 #define UVM_PCTPARAM_SCALE (1 << UVM_PCTPARAM_SHIFT) 292 #define UVM_PCTPARAM_APPLY(pct, x) \ 293 (((x) * (pct)->pct_scaled) >> UVM_PCTPARAM_SHIFT) 294 struct uvm_pctparam { 295 int pct_pct; /* percent [0, 100] */ /* should be the first member */ 296 int pct_scaled; 297 int (*pct_check)(struct uvm_pctparam *, int); 298 }; 299 300 /* 301 * uvmexp: global data structures that are exported to parts of the kernel 302 * other than the vm system. 303 */ 304 305 struct uvmexp { 306 /* vm_page constants */ 307 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 308 int pagemask; /* page mask */ 309 int pageshift; /* page shift */ 310 311 /* vm_page counters */ 312 int npages; /* number of pages we manage */ 313 int free; /* number of free pages */ 314 int paging; /* number of pages in the process of being paged out */ 315 int wired; /* number of wired pages */ 316 317 /* 318 * Adding anything before this line will break binary compatibility 319 * with top(1) on NetBSD 1.5. 320 */ 321 322 int ncolors; /* number of page color buckets: must be p-o-2 */ 323 int colormask; /* color bucket mask */ 324 325 int zeropages; /* number of zero'd pages */ 326 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 327 int reserve_kernel; /* number of pages reserved for kernel */ 328 unsigned anonpages; /* number of pages used by anon mappings */ 329 unsigned filepages; /* number of pages used by cached file data */ 330 unsigned execpages; /* number of pages used by cached exec data */ 331 332 /* pageout params */ 333 int freemin; /* min number of free pages */ 334 int freetarg; /* target number of free pages */ 335 int wiredmax; /* max number of wired pages */ 336 337 /* swap */ 338 int nswapdev; /* number of configured swap devices in system */ 339 int swpages; /* number of PAGE_SIZE'ed swap pages */ 340 int swpgavail; /* number of swap pages currently available */ 341 int swpginuse; /* number of swap pages in use */ 342 int swpgonly; /* number of swap pages in use, not also in RAM */ 343 int nswget; /* number of times fault calls uvm_swap_get() */ 344 345 /* stat counters. XXX: should be 64-bit counters */ 346 int _unused_faults; /* page fault count */ 347 int _unused_traps; /* trap count */ 348 int _unused_intrs; /* interrupt count */ 349 int _unused_swtch; /* context switch count */ 350 int _unused_softs; /* software interrupt count */ 351 int _unused_syscalls; /* system calls */ 352 int pageins; /* pagein operation count */ 353 /* pageouts are in pdpageouts below */ 354 int _unused1; 355 int _unused2; 356 int pgswapin; /* pages swapped in */ 357 int pgswapout; /* pages swapped out */ 358 int forks; /* forks */ 359 int forks_ppwait; /* forks where parent waits */ 360 int forks_sharevm; /* forks where vmspace is shared */ 361 int pga_zerohit; /* pagealloc where zero wanted and zero 362 was available */ 363 int pga_zeromiss; /* pagealloc where zero wanted and zero 364 not available */ 365 int zeroaborts; /* number of times page zeroing was 366 aborted */ 367 int colorhit; /* pagealloc where we got optimal color */ 368 int colormiss; /* pagealloc where we didn't */ 369 int cpuhit; /* pagealloc where we allocated locally */ 370 int cpumiss; /* pagealloc where we didn't */ 371 372 /* fault subcounters. XXX: should be 64-bit counters */ 373 int fltnoram; /* number of times fault was out of ram */ 374 int fltnoanon; /* number of times fault was out of anons */ 375 int fltpgwait; /* number of times fault had to wait on a page */ 376 int fltpgrele; /* number of times fault found a released page */ 377 int fltrelck; /* number of times fault relock called */ 378 int fltrelckok; /* number of times fault relock is a success */ 379 int fltanget; /* number of times fault gets anon page */ 380 int fltanretry; /* number of times fault retrys an anon get */ 381 int fltamcopy; /* number of times fault clears "needs copy" */ 382 int fltnamap; /* number of times fault maps a neighbor anon page */ 383 int fltnomap; /* number of times fault maps a neighbor obj page */ 384 int fltlget; /* number of times fault does a locked pgo_get */ 385 int fltget; /* number of times fault does an unlocked get */ 386 int flt_anon; /* number of times fault anon (case 1a) */ 387 int flt_acow; /* number of times fault anon cow (case 1b) */ 388 int flt_obj; /* number of times fault is on object page (2a) */ 389 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 390 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 391 392 /* daemon counters. XXX: should be 64-bit counters */ 393 int pdwoke; /* number of times daemon woke up */ 394 int pdrevs; /* number of times daemon rev'd clock hand */ 395 int _unused3; 396 int pdfreed; /* number of pages daemon freed since boot */ 397 int pdscans; /* number of pages daemon scanned since boot */ 398 int pdanscan; /* number of anonymous pages scanned by daemon */ 399 int pdobscan; /* number of object pages scanned by daemon */ 400 int pdreact; /* number of pages daemon reactivated since boot */ 401 int pdbusy; /* number of times daemon found a busy page */ 402 int pdpageouts; /* number of times daemon started a pageout */ 403 int pdpending; /* number of times daemon got a pending pagout */ 404 int pddeact; /* number of pages daemon deactivates */ 405 int pdreanon; /* anon pages reactivated due to thresholds */ 406 int pdrefile; /* file pages reactivated due to thresholds */ 407 int pdreexec; /* executable pages reactivated due to thresholds */ 408 }; 409 410 /* 411 * The following structure is 64-bit alignment safe. New elements 412 * should only be added to the end of this structure so binary 413 * compatibility can be preserved. 414 */ 415 struct uvmexp_sysctl { 416 int64_t pagesize; 417 int64_t pagemask; 418 int64_t pageshift; 419 int64_t npages; 420 int64_t free; 421 int64_t active; 422 int64_t inactive; 423 int64_t paging; 424 int64_t wired; 425 int64_t zeropages; 426 int64_t reserve_pagedaemon; 427 int64_t reserve_kernel; 428 int64_t freemin; 429 int64_t freetarg; 430 int64_t inactarg; /* unused */ 431 int64_t wiredmax; 432 int64_t nswapdev; 433 int64_t swpages; 434 int64_t swpginuse; 435 int64_t swpgonly; 436 int64_t nswget; 437 int64_t unused1; /* unused; was nanon */ 438 int64_t cpuhit; 439 int64_t cpumiss; 440 int64_t faults; 441 int64_t traps; 442 int64_t intrs; 443 int64_t swtch; 444 int64_t softs; 445 int64_t syscalls; 446 int64_t pageins; 447 int64_t swapins; /* unused */ 448 int64_t swapouts; /* unused */ 449 int64_t pgswapin; 450 int64_t pgswapout; 451 int64_t forks; 452 int64_t forks_ppwait; 453 int64_t forks_sharevm; 454 int64_t pga_zerohit; 455 int64_t pga_zeromiss; 456 int64_t zeroaborts; 457 int64_t fltnoram; 458 int64_t fltnoanon; 459 int64_t fltpgwait; 460 int64_t fltpgrele; 461 int64_t fltrelck; 462 int64_t fltrelckok; 463 int64_t fltanget; 464 int64_t fltanretry; 465 int64_t fltamcopy; 466 int64_t fltnamap; 467 int64_t fltnomap; 468 int64_t fltlget; 469 int64_t fltget; 470 int64_t flt_anon; 471 int64_t flt_acow; 472 int64_t flt_obj; 473 int64_t flt_prcopy; 474 int64_t flt_przero; 475 int64_t pdwoke; 476 int64_t pdrevs; 477 int64_t unused4; 478 int64_t pdfreed; 479 int64_t pdscans; 480 int64_t pdanscan; 481 int64_t pdobscan; 482 int64_t pdreact; 483 int64_t pdbusy; 484 int64_t pdpageouts; 485 int64_t pdpending; 486 int64_t pddeact; 487 int64_t anonpages; 488 int64_t filepages; 489 int64_t execpages; 490 int64_t colorhit; 491 int64_t colormiss; 492 int64_t ncolors; 493 }; 494 495 #ifdef _KERNEL 496 /* we need this before including uvm_page.h on some platforms */ 497 extern struct uvmexp uvmexp; 498 /* MD code needs this without including <uvm/uvm.h> */ 499 extern bool vm_page_zero_enable; 500 #endif 501 502 /* 503 * Finally, bring in standard UVM headers. 504 */ 505 #include <sys/vmmeter.h> 506 #include <sys/queue.h> 507 #include <sys/lock.h> 508 #ifdef _KERNEL 509 #include <sys/vmem.h> 510 #endif 511 #include <uvm/uvm_param.h> 512 #include <uvm/uvm_prot.h> 513 #include <uvm/uvm_pmap.h> 514 #if defined(_KERNEL) || defined(_KMEMUSER) 515 #include <uvm/uvm_map.h> 516 #include <uvm/uvm_pager.h> 517 #endif 518 519 #ifdef _KERNEL 520 /* 521 * Include the uvm_hotplug(9) API unconditionally until 522 * uvm_page_physload() et. al. are obsoleted 523 * 524 * After this, MD code will have to explicitly include it if needed. 525 */ 526 #include <uvm/uvm_physseg.h> 527 #endif 528 529 /* 530 * helpers for calling ubc_release() 531 */ 532 #ifdef PMAP_CACHE_VIVT 533 #define UBC_WANT_UNMAP(vp) (((vp)->v_iflag & VI_TEXT) != 0) 534 #else 535 #define UBC_WANT_UNMAP(vp) false 536 #endif 537 #define UBC_UNMAP_FLAG(vp) (UBC_WANT_UNMAP(vp) ? UBC_UNMAP : 0) 538 539 #if defined(_KERNEL) || defined(_KMEMUSER) 540 /* 541 * Shareable process virtual address space. 542 * May eventually be merged with vm_map. 543 * Several fields are temporary (text, data stuff). 544 */ 545 struct vmspace { 546 struct vm_map vm_map; /* VM address map */ 547 int vm_refcnt; /* number of references * 548 * note: protected by vm_map.ref_lock */ 549 void * vm_shm; /* SYS5 shared memory private data XXX */ 550 /* we copy from vm_startcopy to the end of the structure on fork */ 551 #define vm_startcopy vm_rssize 552 segsz_t vm_rssize; /* current resident set size in pages */ 553 segsz_t vm_swrss; /* resident set size before last swap */ 554 segsz_t vm_tsize; /* text size (pages) XXX */ 555 segsz_t vm_dsize; /* data size (pages) XXX */ 556 segsz_t vm_ssize; /* stack size (pages) */ 557 segsz_t vm_issize; /* initial unmapped stack size (pages) */ 558 void * vm_taddr; /* user virtual address of text XXX */ 559 void * vm_daddr; /* user virtual address of data XXX */ 560 void *vm_maxsaddr; /* user VA at max stack growth */ 561 void *vm_minsaddr; /* user VA at top of stack */ 562 size_t vm_aslr_delta_mmap; /* mmap() random delta for ASLR */ 563 }; 564 #define VMSPACE_IS_KERNEL_P(vm) VM_MAP_IS_KERNEL(&(vm)->vm_map) 565 #endif 566 567 #ifdef _KERNEL 568 569 /* 570 * used to keep state while iterating over the map for a core dump. 571 */ 572 struct uvm_coredump_state { 573 void *cookie; /* opaque for the caller */ 574 vaddr_t start; /* start of region */ 575 vaddr_t realend; /* real end of region */ 576 vaddr_t end; /* virtual end of region */ 577 vm_prot_t prot; /* protection of region */ 578 int flags; /* flags; see below */ 579 }; 580 581 #define UVM_COREDUMP_STACK 0x01 /* region is user stack */ 582 583 /* 584 * the various kernel maps, owned by MD code 585 */ 586 extern struct vm_map *kernel_map; 587 extern struct vm_map *phys_map; 588 589 /* 590 * macros 591 */ 592 593 #define vm_resident_count(vm) (pmap_resident_count((vm)->vm_map.pmap)) 594 595 596 /* vm_machdep.c */ 597 int vmapbuf(struct buf *, vsize_t); 598 void vunmapbuf(struct buf *, vsize_t); 599 600 /* uvm_aobj.c */ 601 struct uvm_object *uao_create(vsize_t, int); 602 void uao_set_pgfl(struct uvm_object *, int); 603 void uao_detach(struct uvm_object *); 604 void uao_reference(struct uvm_object *); 605 606 /* uvm_bio.c */ 607 void ubc_init(void); 608 void ubchist_init(void); 609 void * ubc_alloc(struct uvm_object *, voff_t, vsize_t *, int, 610 int); 611 void ubc_release(void *, int); 612 int ubc_uiomove(struct uvm_object *, struct uio *, vsize_t, 613 int, int); 614 void ubc_zerorange(struct uvm_object *, off_t, size_t, int); 615 void ubc_purge(struct uvm_object *); 616 617 /* uvm_emap.c */ 618 void uvm_emap_sysinit(void); 619 #ifdef __HAVE_PMAP_EMAP 620 void uvm_emap_switch(lwp_t *); 621 #else 622 #define uvm_emap_switch(l) 623 #endif 624 625 u_int uvm_emap_gen_return(void); 626 void uvm_emap_update(u_int); 627 628 vaddr_t uvm_emap_alloc(vsize_t, bool); 629 void uvm_emap_free(vaddr_t, size_t); 630 631 void uvm_emap_enter(vaddr_t, struct vm_page **, u_int); 632 void uvm_emap_remove(vaddr_t, vsize_t); 633 634 #ifdef __HAVE_PMAP_EMAP 635 void uvm_emap_consume(u_int); 636 u_int uvm_emap_produce(void); 637 #else 638 #define uvm_emap_consume(x) 639 #define uvm_emap_produce() UVM_EMAP_INACTIVE 640 #endif 641 642 /* uvm_fault.c */ 643 #define uvm_fault(m, a, p) uvm_fault_internal(m, a, p, 0) 644 int uvm_fault_internal(struct vm_map *, vaddr_t, vm_prot_t, int); 645 /* handle a page fault */ 646 647 /* uvm_glue.c */ 648 #if defined(KGDB) 649 void uvm_chgkprot(void *, size_t, int); 650 #endif 651 void uvm_proc_fork(struct proc *, struct proc *, bool); 652 void uvm_lwp_fork(struct lwp *, struct lwp *, 653 void *, size_t, void (*)(void *), void *); 654 int uvm_coredump_walkmap(struct proc *, 655 int (*)(struct uvm_coredump_state *), void *); 656 int uvm_coredump_count_segs(struct proc *); 657 void uvm_proc_exit(struct proc *); 658 void uvm_lwp_exit(struct lwp *); 659 void uvm_init_limits(struct proc *); 660 bool uvm_kernacc(void *, size_t, vm_prot_t); 661 __dead void uvm_scheduler(void); 662 vaddr_t uvm_uarea_alloc(void); 663 void uvm_uarea_free(vaddr_t); 664 vaddr_t uvm_uarea_system_alloc(struct cpu_info *); 665 void uvm_uarea_system_free(vaddr_t); 666 vaddr_t uvm_lwp_getuarea(lwp_t *); 667 void uvm_lwp_setuarea(lwp_t *, vaddr_t); 668 int uvm_vslock(struct vmspace *, void *, size_t, vm_prot_t); 669 void uvm_vsunlock(struct vmspace *, void *, size_t); 670 void uvm_cpu_attach(struct cpu_info *); 671 672 673 /* uvm_init.c */ 674 void uvm_md_init(void); 675 void uvm_init(void); 676 677 /* uvm_io.c */ 678 int uvm_io(struct vm_map *, struct uio *, int); 679 680 /* uvm_km.c */ 681 vaddr_t uvm_km_alloc(struct vm_map *, vsize_t, vsize_t, 682 uvm_flag_t); 683 int uvm_km_protect(struct vm_map *, vaddr_t, vsize_t, 684 vm_prot_t); 685 void uvm_km_free(struct vm_map *, vaddr_t, vsize_t, 686 uvm_flag_t); 687 688 struct vm_map *uvm_km_suballoc(struct vm_map *, vaddr_t *, 689 vaddr_t *, vsize_t, int, bool, 690 struct vm_map *); 691 int uvm_km_kmem_alloc(vmem_t *, vmem_size_t, vm_flag_t, 692 vmem_addr_t *); 693 void uvm_km_kmem_free(vmem_t *, vmem_addr_t, vmem_size_t); 694 bool uvm_km_va_starved_p(void); 695 696 /* uvm_map.c */ 697 int uvm_map(struct vm_map *, vaddr_t *, vsize_t, 698 struct uvm_object *, voff_t, vsize_t, 699 uvm_flag_t); 700 int uvm_map_pageable(struct vm_map *, vaddr_t, 701 vaddr_t, bool, int); 702 int uvm_map_pageable_all(struct vm_map *, int, vsize_t); 703 bool uvm_map_checkprot(struct vm_map *, vaddr_t, 704 vaddr_t, vm_prot_t); 705 int uvm_map_protect(struct vm_map *, vaddr_t, 706 vaddr_t, vm_prot_t, bool); 707 int uvm_map_protect_user(struct lwp *, vaddr_t, vaddr_t, 708 vm_prot_t); 709 struct vmspace *uvmspace_alloc(vaddr_t, vaddr_t, bool); 710 void uvmspace_init(struct vmspace *, struct pmap *, 711 vaddr_t, vaddr_t, bool); 712 void uvmspace_exec(struct lwp *, vaddr_t, vaddr_t, bool); 713 void uvmspace_spawn(struct lwp *, vaddr_t, vaddr_t, bool); 714 struct vmspace *uvmspace_fork(struct vmspace *); 715 void uvmspace_addref(struct vmspace *); 716 void uvmspace_free(struct vmspace *); 717 void uvmspace_share(struct proc *, struct proc *); 718 void uvmspace_unshare(struct lwp *); 719 720 void uvm_whatis(uintptr_t, void (*)(const char *, ...)); 721 722 /* uvm_meter.c */ 723 int uvm_sysctl(int *, u_int, void *, size_t *, 724 void *, size_t, struct proc *); 725 int uvm_pctparam_check(struct uvm_pctparam *, int); 726 void uvm_pctparam_set(struct uvm_pctparam *, int); 727 int uvm_pctparam_get(struct uvm_pctparam *); 728 void uvm_pctparam_init(struct uvm_pctparam *, int, 729 int (*)(struct uvm_pctparam *, int)); 730 int uvm_pctparam_createsysctlnode(struct uvm_pctparam *, 731 const char *, const char *); 732 733 /* uvm_mmap.c */ 734 int uvm_mmap_dev(struct proc *, void **, size_t, dev_t, 735 off_t); 736 int uvm_mmap_anon(struct proc *, void **, size_t); 737 vaddr_t uvm_default_mapaddr(struct proc *, vaddr_t, vsize_t, 738 int); 739 740 /* uvm_mremap.c */ 741 int uvm_mremap(struct vm_map *, vaddr_t, vsize_t, 742 struct vm_map *, vaddr_t *, vsize_t, 743 struct proc *, int); 744 745 /* uvm_object.c */ 746 void uvm_obj_init(struct uvm_object *, 747 const struct uvm_pagerops *, bool, u_int); 748 void uvm_obj_setlock(struct uvm_object *, kmutex_t *); 749 void uvm_obj_destroy(struct uvm_object *, bool); 750 int uvm_obj_wirepages(struct uvm_object *, off_t, off_t, 751 struct pglist *); 752 void uvm_obj_unwirepages(struct uvm_object *, off_t, off_t); 753 754 /* uvm_page.c */ 755 struct vm_page *uvm_pagealloc_strat(struct uvm_object *, 756 voff_t, struct vm_anon *, int, int, int); 757 #define uvm_pagealloc(obj, off, anon, flags) \ 758 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 759 UVM_PGA_STRAT_NORMAL, 0) 760 void uvm_pagereplace(struct vm_page *, 761 struct vm_page *); 762 void uvm_pagerealloc(struct vm_page *, 763 struct uvm_object *, voff_t); 764 void uvm_setpagesize(void); 765 766 /* uvm_pager.c */ 767 void uvm_aio_biodone(struct buf *); 768 void uvm_aio_aiodone(struct buf *); 769 void uvm_aio_aiodone_pages(struct vm_page **, int, bool, 770 int); 771 772 /* uvm_pdaemon.c */ 773 void uvm_pageout(void *); 774 struct work; 775 void uvm_aiodone_worker(struct work *, void *); 776 void uvm_pageout_start(int); 777 void uvm_pageout_done(int); 778 void uvm_estimatepageable(int *, int *); 779 780 /* uvm_pglist.c */ 781 int uvm_pglistalloc(psize_t, paddr_t, paddr_t, 782 paddr_t, paddr_t, struct pglist *, int, int); 783 void uvm_pglistfree(struct pglist *); 784 785 /* uvm_swap.c */ 786 void uvm_swap_init(void); 787 788 /* uvm_unix.c */ 789 int uvm_grow(struct proc *, vaddr_t); 790 791 /* uvm_user.c */ 792 void uvm_deallocate(struct vm_map *, vaddr_t, vsize_t); 793 794 /* uvm_vnode.c */ 795 void uvm_vnp_setsize(struct vnode *, voff_t); 796 void uvm_vnp_setwritesize(struct vnode *, voff_t); 797 int uvn_findpages(struct uvm_object *, voff_t, 798 int *, struct vm_page **, int); 799 bool uvn_text_p(struct uvm_object *); 800 bool uvn_clean_p(struct uvm_object *); 801 bool uvn_needs_writefault_p(struct uvm_object *); 802 803 /* kern_malloc.c */ 804 void kmeminit_nkmempages(void); 805 extern int nkmempages; 806 807 #endif /* _KERNEL */ 808 809 #endif /* _UVM_UVM_EXTERN_H_ */ 810
Indexes created Sat Sep 20 22:09:52 GMT 2025