uvm_extern.h revision 1.44
1 /* $NetBSD: uvm_extern.h,v 1.44 2000/06/27 09:00:14 mrg Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor and 19 * Washington University. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp 35 */ 36 37 /*- 38 * Copyright (c) 1992, 1993 39 * The Regents of the University of California. All rights reserved. 40 * 41 * Redistribution and use in source and binary forms, with or without 42 * modification, are permitted provided that the following conditions 43 * are met: 44 * 1. Redistributions of source code must retain the above copyright 45 * notice, this list of conditions and the following disclaimer. 46 * 2. Redistributions in binary form must reproduce the above copyright 47 * notice, this list of conditions and the following disclaimer in the 48 * documentation and/or other materials provided with the distribution. 49 * 3. All advertising materials mentioning features or use of this software 50 * must display the following acknowledgement: 51 * This product includes software developed by the University of 52 * California, Berkeley and its contributors. 53 * 4. Neither the name of the University nor the names of its contributors 54 * may be used to endorse or promote products derived from this software 55 * without specific prior written permission. 56 * 57 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 58 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 59 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 60 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 61 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 62 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 63 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 64 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 65 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 66 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 67 * SUCH DAMAGE. 68 * 69 * @(#)vm_extern.h 8.5 (Berkeley) 5/3/95 70 */ 71 72 #ifndef _UVM_UVM_EXTERN_H_ 73 #define _UVM_UVM_EXTERN_H_ 74 75 /* 76 * uvm_extern.h: this file defines the external interface to the VM system. 77 * 78 * this should be the only file included by non-VM parts of the kernel 79 * which need access to VM services. if you want to know the interface 80 * to the MI VM layer without knowing the details, this is the file to 81 * learn. 82 * 83 * NOTE: vm system calls are prototyped in syscallargs.h 84 */ 85 86 /* 87 * defines 88 */ 89 90 /* 91 * the following defines are for uvm_map and functions which call it. 92 */ 93 94 /* protections bits */ 95 #define UVM_PROT_MASK 0x07 /* protection mask */ 96 #define UVM_PROT_NONE 0x00 /* protection none */ 97 #define UVM_PROT_ALL 0x07 /* everything */ 98 #define UVM_PROT_READ 0x01 /* read */ 99 #define UVM_PROT_WRITE 0x02 /* write */ 100 #define UVM_PROT_EXEC 0x04 /* exec */ 101 102 /* protection short codes */ 103 #define UVM_PROT_R 0x01 /* read */ 104 #define UVM_PROT_W 0x02 /* write */ 105 #define UVM_PROT_RW 0x03 /* read-write */ 106 #define UVM_PROT_X 0x04 /* exec */ 107 #define UVM_PROT_RX 0x05 /* read-exec */ 108 #define UVM_PROT_WX 0x06 /* write-exec */ 109 #define UVM_PROT_RWX 0x07 /* read-write-exec */ 110 111 /* 0x08: not used */ 112 113 /* inherit codes */ 114 #define UVM_INH_MASK 0x30 /* inherit mask */ 115 #define UVM_INH_SHARE 0x00 /* "share" */ 116 #define UVM_INH_COPY 0x10 /* "copy" */ 117 #define UVM_INH_NONE 0x20 /* "none" */ 118 #define UVM_INH_DONATE 0x30 /* "donate" << not used */ 119 120 /* 0x40, 0x80: not used */ 121 122 /* bits 0x700: max protection, 0x800: not used */ 123 124 /* bits 0x7000: advice, 0x8000: not used */ 125 /* advice: matches MADV_* from sys/mman.h */ 126 #define UVM_ADV_NORMAL 0x0 /* 'normal' */ 127 #define UVM_ADV_RANDOM 0x1 /* 'random' */ 128 #define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */ 129 /* 0x3: will need, 0x4: dontneed */ 130 #define UVM_ADV_MASK 0x7 /* mask */ 131 132 /* mapping flags */ 133 #define UVM_FLAG_FIXED 0x010000 /* find space */ 134 #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */ 135 #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */ 136 #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */ 137 #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */ 138 #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */ 139 140 /* macros to extract info */ 141 #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 142 #define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 143 #define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 144 #define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 145 146 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 147 ((MAXPROT << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 148 149 /* magic offset value */ 150 #define UVM_UNKNOWN_OFFSET ((voff_t) -1) 151 /* offset not known(obj) or don't care(!obj) */ 152 153 /* 154 * the following defines are for uvm_km_kmemalloc's flags 155 */ 156 #define UVM_KMF_NOWAIT 0x1 /* matches M_NOWAIT */ 157 #define UVM_KMF_VALLOC 0x2 /* allocate VA only */ 158 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 159 160 /* 161 * the following defines the strategies for uvm_pagealloc_strat() 162 */ 163 #define UVM_PGA_STRAT_NORMAL 0 /* high -> low free list walk */ 164 #define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 165 #define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 166 167 /* 168 * flags for uvm_pagealloc_strat() 169 */ 170 #define UVM_PGA_USERESERVE 0x0001 /* ok to use reserve pages */ 171 #define UVM_PGA_ZERO 0x0002 /* returned page must be zero'd */ 172 173 /* 174 * lockflags that control the locking behavior of various functions. 175 */ 176 #define UVM_LK_ENTER 0x00000001 /* map locked on entry */ 177 #define UVM_LK_EXIT 0x00000002 /* leave map locked on exit */ 178 179 /* 180 * structures 181 */ 182 183 struct core; 184 struct mount; 185 struct pglist; 186 struct proc; 187 struct ucred; 188 struct uio; 189 struct uvm_object; 190 struct vm_anon; 191 struct vmspace; 192 struct pmap; 193 struct vnode; 194 struct simplelock; 195 196 /* 197 * uvmexp: global data structures that are exported to parts of the kernel 198 * other than the vm system. 199 */ 200 201 struct uvmexp { 202 /* vm_page constants */ 203 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 204 int pagemask; /* page mask */ 205 int pageshift; /* page shift */ 206 207 /* vm_page counters */ 208 int npages; /* number of pages we manage */ 209 int free; /* number of free pages */ 210 int active; /* number of active pages */ 211 int inactive; /* number of pages that we free'd but may want back */ 212 int paging; /* number of pages in the process of being paged out */ 213 int wired; /* number of wired pages */ 214 int zeropages; /* number of zero'd pages */ 215 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 216 int reserve_kernel; /* number of pages reserved for kernel */ 217 218 /* pageout params */ 219 int freemin; /* min number of free pages */ 220 int freetarg; /* target number of free pages */ 221 int inactarg; /* target number of inactive pages */ 222 int wiredmax; /* max number of wired pages */ 223 224 /* swap */ 225 int nswapdev; /* number of configured swap devices in system */ 226 int swpages; /* number of PAGE_SIZE'ed swap pages */ 227 int swpguniq; /* number of swap pages in use, not also in RAM */ 228 int swpginuse; /* number of swap pages in use */ 229 int swpgonly; /* number of swap pages in use, not also in RAM */ 230 int nswget; /* number of times fault calls uvm_swap_get() */ 231 int nanon; /* number total of anon's in system */ 232 int nanonneeded;/* number of anons currently needed */ 233 int nfreeanon; /* number of free anon's */ 234 235 /* stat counters */ 236 int faults; /* page fault count */ 237 int traps; /* trap count */ 238 int intrs; /* interrupt count */ 239 int swtch; /* context switch count */ 240 int softs; /* software interrupt count */ 241 int syscalls; /* system calls */ 242 int pageins; /* pagein operation count */ 243 /* pageouts are in pdpageouts below */ 244 int swapins; /* swapins */ 245 int swapouts; /* swapouts */ 246 int pgswapin; /* pages swapped in */ 247 int pgswapout; /* pages swapped out */ 248 int forks; /* forks */ 249 int forks_ppwait; /* forks where parent waits */ 250 int forks_sharevm; /* forks where vmspace is shared */ 251 int pga_zerohit; /* pagealloc where zero wanted and zero 252 was available */ 253 int pga_zeromiss; /* pagealloc where zero wanted and zero 254 not available */ 255 256 /* fault subcounters */ 257 int fltnoram; /* number of times fault was out of ram */ 258 int fltnoanon; /* number of times fault was out of anons */ 259 int fltpgwait; /* number of times fault had to wait on a page */ 260 int fltpgrele; /* number of times fault found a released page */ 261 int fltrelck; /* number of times fault relock called */ 262 int fltrelckok; /* number of times fault relock is a success */ 263 int fltanget; /* number of times fault gets anon page */ 264 int fltanretry; /* number of times fault retrys an anon get */ 265 int fltamcopy; /* number of times fault clears "needs copy" */ 266 int fltnamap; /* number of times fault maps a neighbor anon page */ 267 int fltnomap; /* number of times fault maps a neighbor obj page */ 268 int fltlget; /* number of times fault does a locked pgo_get */ 269 int fltget; /* number of times fault does an unlocked get */ 270 int flt_anon; /* number of times fault anon (case 1a) */ 271 int flt_acow; /* number of times fault anon cow (case 1b) */ 272 int flt_obj; /* number of times fault is on object page (2a) */ 273 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 274 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 275 276 /* daemon counters */ 277 int pdwoke; /* number of times daemon woke up */ 278 int pdrevs; /* number of times daemon rev'd clock hand */ 279 int pdswout; /* number of times daemon called for swapout */ 280 int pdfreed; /* number of pages daemon freed since boot */ 281 int pdscans; /* number of pages daemon scaned since boot */ 282 int pdanscan; /* number of anonymous pages scanned by daemon */ 283 int pdobscan; /* number of object pages scanned by daemon */ 284 int pdreact; /* number of pages daemon reactivated since boot */ 285 int pdbusy; /* number of times daemon found a busy page */ 286 int pdpageouts; /* number of times daemon started a pageout */ 287 int pdpending; /* number of times daemon got a pending pagout */ 288 int pddeact; /* number of pages daemon deactivates */ 289 290 /* kernel memory objects: managed by uvm_km_kmemalloc() only! */ 291 struct uvm_object *kmem_object; 292 struct uvm_object *mb_object; 293 }; 294 295 #ifdef _KERNEL 296 297 extern struct uvmexp uvmexp; 298 299 /* 300 * the various kernel maps, owned by MD code 301 */ 302 extern vm_map_t exec_map; 303 extern vm_map_t kernel_map; 304 extern vm_map_t kmem_map; 305 extern vm_map_t mb_map; 306 extern vm_map_t phys_map; 307 308 /* 309 * macros 310 */ 311 312 /* zalloc zeros memory, alloc does not */ 313 #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE) 314 #define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE) 315 316 #endif /* _KERNEL */ 317 318 /* 319 * typedefs 320 */ 321 322 typedef unsigned int uvm_flag_t; 323 typedef int vm_fault_t; 324 325 /* XXX clean up later */ 326 struct buf; 327 struct loadavg; 328 struct proc; 329 struct pmap; 330 struct vmspace; 331 struct vmtotal; 332 struct mount; 333 struct vnode; 334 struct core; 335 336 #ifdef _KERNEL 337 338 /* vm_machdep.c */ 339 void vmapbuf __P((struct buf *, vsize_t)); 340 void vunmapbuf __P((struct buf *, vsize_t)); 341 void pagemove __P((caddr_t, caddr_t, size_t)); 342 #ifndef cpu_swapin 343 void cpu_swapin __P((struct proc *)); 344 #endif 345 #ifndef cpu_swapout 346 void cpu_swapout __P((struct proc *)); 347 #endif 348 349 /* uvm_aobj.c */ 350 struct uvm_object *uao_create __P((vsize_t, int)); 351 void uao_detach __P((struct uvm_object *)); 352 void uao_detach_locked __P((struct uvm_object *)); 353 void uao_reference __P((struct uvm_object *)); 354 void uao_reference_locked __P((struct uvm_object *)); 355 356 /* uvm_fault.c */ 357 int uvm_fault __P((vm_map_t, vaddr_t, 358 vm_fault_t, vm_prot_t)); 359 /* handle a page fault */ 360 361 /* uvm_glue.c */ 362 #if defined(KGDB) 363 void uvm_chgkprot __P((caddr_t, size_t, int)); 364 #endif 365 void uvm_fork __P((struct proc *, struct proc *, boolean_t, 366 void *, size_t, void (*)(void *), void *)); 367 void uvm_exit __P((struct proc *)); 368 void uvm_init_limits __P((struct proc *)); 369 boolean_t uvm_kernacc __P((caddr_t, size_t, int)); 370 __dead void uvm_scheduler __P((void)) __attribute__((noreturn)); 371 void uvm_swapin __P((struct proc *)); 372 boolean_t uvm_useracc __P((caddr_t, size_t, int)); 373 int uvm_vslock __P((struct proc *, caddr_t, size_t, 374 vm_prot_t)); 375 void uvm_vsunlock __P((struct proc *, caddr_t, size_t)); 376 377 378 /* uvm_init.c */ 379 void uvm_init __P((void)); 380 /* init the uvm system */ 381 382 /* uvm_io.c */ 383 int uvm_io __P((vm_map_t, struct uio *)); 384 385 /* uvm_km.c */ 386 vaddr_t uvm_km_alloc1 __P((vm_map_t, vsize_t, boolean_t)); 387 void uvm_km_free __P((vm_map_t, vaddr_t, vsize_t)); 388 void uvm_km_free_wakeup __P((vm_map_t, vaddr_t, 389 vsize_t)); 390 vaddr_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *, 391 vsize_t, int)); 392 struct vm_map *uvm_km_suballoc __P((vm_map_t, vaddr_t *, 393 vaddr_t *, vsize_t, int, 394 boolean_t, vm_map_t)); 395 vaddr_t uvm_km_valloc __P((vm_map_t, vsize_t)); 396 vaddr_t uvm_km_valloc_wait __P((vm_map_t, vsize_t)); 397 vaddr_t uvm_km_alloc_poolpage1 __P((vm_map_t, 398 struct uvm_object *, boolean_t)); 399 void uvm_km_free_poolpage1 __P((vm_map_t, vaddr_t)); 400 401 #define uvm_km_alloc_poolpage(waitok) uvm_km_alloc_poolpage1(kmem_map, \ 402 uvmexp.kmem_object, (waitok)) 403 #define uvm_km_free_poolpage(addr) uvm_km_free_poolpage1(kmem_map, (addr)) 404 405 /* uvm_map.c */ 406 int uvm_map __P((vm_map_t, vaddr_t *, vsize_t, 407 struct uvm_object *, voff_t, uvm_flag_t)); 408 int uvm_map_pageable __P((vm_map_t, vaddr_t, 409 vaddr_t, boolean_t, int)); 410 int uvm_map_pageable_all __P((vm_map_t, int, vsize_t)); 411 boolean_t uvm_map_checkprot __P((vm_map_t, vaddr_t, 412 vaddr_t, vm_prot_t)); 413 int uvm_map_protect __P((vm_map_t, vaddr_t, 414 vaddr_t, vm_prot_t, boolean_t)); 415 struct vmspace *uvmspace_alloc __P((vaddr_t, vaddr_t, 416 boolean_t)); 417 void uvmspace_init __P((struct vmspace *, struct pmap *, 418 vaddr_t, vaddr_t, boolean_t)); 419 void uvmspace_exec __P((struct proc *)); 420 struct vmspace *uvmspace_fork __P((struct vmspace *)); 421 void uvmspace_free __P((struct vmspace *)); 422 void uvmspace_share __P((struct proc *, struct proc *)); 423 void uvmspace_unshare __P((struct proc *)); 424 425 426 /* uvm_meter.c */ 427 void uvm_meter __P((void)); 428 int uvm_sysctl __P((int *, u_int, void *, size_t *, 429 void *, size_t, struct proc *)); 430 431 /* uvm_mmap.c */ 432 int uvm_mmap __P((vm_map_t, vaddr_t *, vsize_t, 433 vm_prot_t, vm_prot_t, int, 434 caddr_t, voff_t, vsize_t)); 435 436 /* uvm_page.c */ 437 struct vm_page *uvm_pagealloc_strat __P((struct uvm_object *, 438 voff_t, struct vm_anon *, int, int, int)); 439 #define uvm_pagealloc(obj, off, anon, flags) \ 440 uvm_pagealloc_strat((obj), (off), (anon), (flags), \ 441 UVM_PGA_STRAT_NORMAL, 0) 442 void uvm_pagerealloc __P((struct vm_page *, 443 struct uvm_object *, voff_t)); 444 /* Actually, uvm_page_physload takes PF#s which need their own type */ 445 void uvm_page_physload __P((paddr_t, paddr_t, 446 paddr_t, paddr_t, int)); 447 void uvm_setpagesize __P((void)); 448 449 /* uvm_pdaemon.c */ 450 void uvm_pageout __P((void)); 451 452 /* uvm_pglist.c */ 453 int uvm_pglistalloc __P((psize_t, paddr_t, 454 paddr_t, paddr_t, paddr_t, 455 struct pglist *, int, int)); 456 void uvm_pglistfree __P((struct pglist *)); 457 458 /* uvm_swap.c */ 459 void uvm_swap_init __P((void)); 460 461 /* uvm_unix.c */ 462 int uvm_coredump __P((struct proc *, struct vnode *, 463 struct ucred *, struct core *)); 464 int uvm_grow __P((struct proc *, vaddr_t)); 465 /* should only be needed if COMPAT_NETBSD32 is defined */ 466 struct core32; 467 int uvm_coredump32 __P((struct proc *, struct vnode *, 468 struct ucred *, struct core32 *)); 469 470 /* uvm_user.c */ 471 int uvm_deallocate __P((vm_map_t, vaddr_t, vsize_t)); 472 473 /* uvm_vnode.c */ 474 void uvm_vnp_setsize __P((struct vnode *, voff_t)); 475 void uvm_vnp_sync __P((struct mount *)); 476 void uvm_vnp_terminate __P((struct vnode *)); 477 /* terminate a uvm/uvn object */ 478 boolean_t uvm_vnp_uncache __P((struct vnode *)); 479 struct uvm_object *uvn_attach __P((void *, vm_prot_t)); 480 481 /* kern_malloc.c */ 482 void kmeminit_nkmempages __P((void)); 483 void kmeminit __P((void)); 484 extern int nkmempages; 485 486 #endif /* _KERNEL */ 487 488 #endif /* _UVM_UVM_EXTERN_H_ */ 489
Indexes created Sat Sep 20 22:09:52 GMT 2025