uvm_extern.h revision 1.17
1 /* $NetBSD: uvm_extern.h,v 1.17 1998/07/31 20:46:37 thorpej Exp $ */ 2 3 /* 4 * XXXCDC: "ROUGH DRAFT" QUALITY UVM PRE-RELEASE FILE! 5 * >>>USE AT YOUR OWN RISK, WORK IS NOT FINISHED<<< 6 */ 7 /* 8 * 9 * Copyright (c) 1997 Charles D. Cranor and Washington University. 10 * All rights reserved. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by Charles D. Cranor and 23 * Washington University. 24 * 4. The name of the author may not be used to endorse or promote products 25 * derived from this software without specific prior written permission. 26 * 27 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 28 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 29 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 30 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 31 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 32 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 33 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 34 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 35 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 36 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 37 * 38 * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp 39 */ 40 41 #ifndef _UVM_UVM_EXTERN_H_ 42 #define _UVM_UVM_EXTERN_H_ 43 44 /* 45 * uvm_extern.h: this file defines the external interface to the VM system. 46 * 47 * this should be the only file included by non-VM parts of the kernel 48 * which need access to VM services. if you want to know the interface 49 * to the MI VM layer without knowing the details, this is the file to 50 * learn. 51 * 52 * NOTE: vm system calls are prototyped in syscallargs.h 53 */ 54 55 /* 56 * defines 57 */ 58 59 /* 60 * the following defines are for uvm_map and functions which call it. 61 */ 62 63 /* protections bits */ 64 #define UVM_PROT_MASK 0x07 /* protection mask */ 65 #define UVM_PROT_NONE 0x00 /* protection none */ 66 #define UVM_PROT_ALL 0x07 /* everything */ 67 #define UVM_PROT_READ 0x01 /* read */ 68 #define UVM_PROT_WRITE 0x02 /* write */ 69 #define UVM_PROT_EXEC 0x04 /* exec */ 70 71 /* protection short codes */ 72 #define UVM_PROT_R 0x01 /* read */ 73 #define UVM_PROT_W 0x02 /* write */ 74 #define UVM_PROT_RW 0x03 /* read-write */ 75 #define UVM_PROT_X 0x04 /* exec */ 76 #define UVM_PROT_RX 0x05 /* read-exec */ 77 #define UVM_PROT_WX 0x06 /* write-exec */ 78 #define UVM_PROT_RWX 0x07 /* read-write-exec */ 79 80 /* 0x08: not used */ 81 82 /* inherit codes */ 83 #define UVM_INH_MASK 0x30 /* inherit mask */ 84 #define UVM_INH_SHARE 0x00 /* "share" */ 85 #define UVM_INH_COPY 0x10 /* "copy" */ 86 #define UVM_INH_NONE 0x20 /* "none" */ 87 #define UVM_INH_DONATE 0x30 /* "donate" << not used */ 88 89 /* 0x40, 0x80: not used */ 90 91 /* bits 0x700: max protection, 0x800: not used */ 92 93 /* bits 0x7000: advice, 0x8000: not used */ 94 /* advice: matches MADV_* from sys/mman.h */ 95 #define UVM_ADV_NORMAL 0x0 /* 'normal' */ 96 #define UVM_ADV_RANDOM 0x1 /* 'random' */ 97 #define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */ 98 /* 0x3: will need, 0x4: dontneed */ 99 #define UVM_ADV_MASK 0x7 /* mask */ 100 101 /* mapping flags */ 102 #define UVM_FLAG_FIXED 0x010000 /* find space */ 103 #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */ 104 #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */ 105 #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */ 106 #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */ 107 #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */ 108 109 /* macros to extract info */ 110 #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 111 #define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 112 #define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 113 #define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 114 115 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 116 ((MAXPROT << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 117 118 /* magic offset value */ 119 #define UVM_UNKNOWN_OFFSET ((vm_offset_t) -1) 120 /* offset not known(obj) or don't care(!obj) */ 121 122 /* 123 * the following defines are for uvm_km_kmemalloc's flags 124 */ 125 126 #define UVM_KMF_NOWAIT 0x1 /* matches M_NOWAIT */ 127 #define UVM_KMF_VALLOC 0x2 /* allocate VA only */ 128 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 129 130 /* 131 * the following defines the strategies for uvm_pagealloc_strat() 132 */ 133 #define UVM_PGA_STRAT_NORMAL 0 /* high -> low free list walk */ 134 #define UVM_PGA_STRAT_ONLY 1 /* only specified free list */ 135 #define UVM_PGA_STRAT_FALLBACK 2 /* ONLY falls back on NORMAL */ 136 137 /* 138 * structures 139 */ 140 141 struct core; 142 struct mount; 143 struct pglist; 144 struct proc; 145 struct ucred; 146 struct uio; 147 struct uvm_object; 148 struct vm_anon; 149 struct vmspace; 150 struct pmap; 151 struct vnode; 152 153 /* 154 * uvmexp: global data structures that are exported to parts of the kernel 155 * other than the vm system. 156 */ 157 158 struct uvmexp { 159 /* vm_page constants */ 160 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 161 int pagemask; /* page mask */ 162 int pageshift; /* page shift */ 163 164 /* vm_page counters */ 165 int npages; /* number of pages we manage */ 166 int free; /* number of free pages */ 167 int active; /* number of active pages */ 168 int inactive; /* number of pages that we free'd but may want back */ 169 int paging; /* number of pages in the process of being paged out */ 170 int wired; /* number of wired pages */ 171 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 172 int reserve_kernel; /* number of pages reserved for kernel */ 173 174 /* pageout params */ 175 int freemin; /* min number of free pages */ 176 int freetarg; /* target number of free pages */ 177 int inactarg; /* target number of inactive pages */ 178 int wiredmax; /* max number of wired pages */ 179 180 /* swap */ 181 int nswapdev; /* number of configured swap devices in system */ 182 int swpages; /* number of PAGE_SIZE'ed swap pages */ 183 int swpginuse; /* number of swap pages in use */ 184 int nswget; /* number of times fault calls uvm_swap_get() */ 185 int nanon; /* number total of anon's in system */ 186 int nfreeanon; /* number of free anon's */ 187 188 /* stat counters */ 189 int faults; /* page fault count */ 190 int traps; /* trap count */ 191 int intrs; /* interrupt count */ 192 int swtch; /* context switch count */ 193 int softs; /* software interrupt count */ 194 int syscalls; /* system calls */ 195 int pageins; /* pagein operation count */ 196 /* pageouts are in pdpageouts below */ 197 int swapins; /* swapins */ 198 int swapouts; /* swapouts */ 199 int pgswapin; /* pages swapped in */ 200 int pgswapout; /* pages swapped out */ 201 int forks; /* forks */ 202 int forks_ppwait; /* forks where parent waits */ 203 int forks_sharevm; /* forks where vmspace is shared */ 204 205 /* fault subcounters */ 206 int fltnoram; /* number of times fault was out of ram */ 207 int fltnoanon; /* number of times fault was out of anons */ 208 int fltpgwait; /* number of times fault had to wait on a page */ 209 int fltpgrele; /* number of times fault found a released page */ 210 int fltrelck; /* number of times fault relock called */ 211 int fltrelckok; /* number of times fault relock is a success */ 212 int fltanget; /* number of times fault gets anon page */ 213 int fltanretry; /* number of times fault retrys an anon get */ 214 int fltamcopy; /* number of times fault clears "needs copy" */ 215 int fltnamap; /* number of times fault maps a neighbor anon page */ 216 int fltnomap; /* number of times fault maps a neighbor obj page */ 217 int fltlget; /* number of times fault does a locked pgo_get */ 218 int fltget; /* number of times fault does an unlocked get */ 219 int flt_anon; /* number of times fault anon (case 1a) */ 220 int flt_acow; /* number of times fault anon cow (case 1b) */ 221 int flt_obj; /* number of times fault is on object page (2a) */ 222 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 223 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 224 225 /* daemon counters */ 226 int pdwoke; /* number of times daemon woke up */ 227 int pdrevs; /* number of times daemon rev'd clock hand */ 228 int pdswout; /* number of times daemon called for swapout */ 229 int pdfreed; /* number of pages daemon freed since boot */ 230 int pdscans; /* number of pages daemon scaned since boot */ 231 int pdanscan; /* number of anonymous pages scanned by daemon */ 232 int pdobscan; /* number of object pages scanned by daemon */ 233 int pdreact; /* number of pages daemon reactivated since boot */ 234 int pdbusy; /* number of times daemon found a busy page */ 235 int pdpageouts; /* number of times daemon started a pageout */ 236 int pdpending; /* number of times daemon got a pending pagout */ 237 int pddeact; /* number of pages daemon deactivates */ 238 239 /* kernel memory objects: managed by uvm_km_kmemalloc() only! */ 240 struct uvm_object *kmem_object; 241 struct uvm_object *mb_object; 242 }; 243 244 245 extern struct uvmexp uvmexp; 246 247 /* 248 * macros 249 */ 250 251 /* zalloc zeros memory, alloc does not */ 252 #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE) 253 #define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE) 254 255 /* 256 * typedefs 257 */ 258 259 typedef unsigned int uvm_flag_t; 260 typedef int vm_fault_t; 261 262 /* uvm_aobj.c */ 263 struct uvm_object *uao_create __P((vm_size_t, int)); 264 void uao_detach __P((struct uvm_object *)); 265 void uao_reference __P((struct uvm_object *)); 266 267 /* uvm_fault.c */ 268 int uvm_fault __P((vm_map_t, vm_offset_t, 269 vm_fault_t, vm_prot_t)); 270 /* handle a page fault */ 271 272 /* uvm_glue.c */ 273 #if defined(KGDB) 274 void uvm_chgkprot __P((caddr_t, size_t, int)); 275 #endif 276 void uvm_fork __P((struct proc *, struct proc *, boolean_t)); 277 void uvm_init_limits __P((struct proc *)); 278 boolean_t uvm_kernacc __P((caddr_t, size_t, int)); 279 __dead void uvm_scheduler __P((void)) __attribute__((noreturn)); 280 void uvm_swapin __P((struct proc *)); 281 boolean_t uvm_useracc __P((caddr_t, size_t, int)); 282 void uvm_vslock __P((struct proc *, caddr_t, size_t)); 283 void uvm_vsunlock __P((struct proc *, caddr_t, size_t)); 284 285 286 /* uvm_init.c */ 287 void uvm_init __P((void)); 288 /* init the uvm system */ 289 290 /* uvm_io.c */ 291 int uvm_io __P((vm_map_t, struct uio *)); 292 293 /* uvm_km.c */ 294 vm_offset_t uvm_km_alloc1 __P((vm_map_t, vm_size_t, boolean_t)); 295 void uvm_km_free __P((vm_map_t, vm_offset_t, vm_size_t)); 296 void uvm_km_free_wakeup __P((vm_map_t, vm_offset_t, 297 vm_size_t)); 298 vm_offset_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *, 299 vm_size_t, int)); 300 struct vm_map *uvm_km_suballoc __P((vm_map_t, vm_offset_t *, 301 vm_offset_t *, vm_size_t, boolean_t, 302 boolean_t, vm_map_t)); 303 vm_offset_t uvm_km_valloc __P((vm_map_t, vm_size_t)); 304 vm_offset_t uvm_km_valloc_wait __P((vm_map_t, vm_size_t)); 305 vm_offset_t uvm_km_alloc_poolpage1 __P((vm_map_t)); 306 void uvm_km_free_poolpage1 __P((vm_map_t, vm_offset_t)); 307 308 #define uvm_km_alloc_poolpage() uvm_km_alloc_poolpage1(kmem_map) 309 #define uvm_km_free_poolpage(addr) uvm_km_free_poolpage1(kmem_map, (addr)) 310 311 /* uvm_map.c */ 312 int uvm_map __P((vm_map_t, vm_offset_t *, vm_size_t, 313 struct uvm_object *, vm_offset_t, uvm_flag_t)); 314 int uvm_map_pageable __P((vm_map_t, vm_offset_t, 315 vm_offset_t, boolean_t)); 316 boolean_t uvm_map_checkprot __P((vm_map_t, vm_offset_t, 317 vm_offset_t, vm_prot_t)); 318 int uvm_map_protect __P((vm_map_t, vm_offset_t, 319 vm_offset_t, vm_prot_t, boolean_t)); 320 struct vmspace *uvmspace_alloc __P((vm_offset_t, vm_offset_t, 321 boolean_t)); 322 void uvmspace_init __P((struct vmspace *, struct pmap *, 323 vm_offset_t, vm_offset_t, boolean_t)); 324 void uvmspace_exec __P((struct proc *)); 325 struct vmspace *uvmspace_fork __P((struct vmspace *)); 326 void uvmspace_free __P((struct vmspace *)); 327 void uvmspace_share __P((struct proc *, struct proc *)); 328 void uvmspace_unshare __P((struct proc *)); 329 330 331 /* uvm_meter.c */ 332 void uvm_meter __P((void)); 333 int uvm_sysctl __P((int *, u_int, void *, size_t *, 334 void *, size_t, struct proc *)); 335 336 /* uvm_mmap.c */ 337 int uvm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t, 338 vm_prot_t, vm_prot_t, int, 339 caddr_t, vm_offset_t)); 340 341 /* uvm_page.c */ 342 struct vm_page *uvm_pagealloc_strat __P((struct uvm_object *, 343 vm_offset_t, struct vm_anon *, int, int)); 344 #define uvm_pagealloc(obj, off, anon) \ 345 uvm_pagealloc_strat((obj), (off), (anon), UVM_PGA_STRAT_NORMAL, 0) 346 void uvm_pagerealloc __P((struct vm_page *, 347 struct uvm_object *, vm_offset_t)); 348 void uvm_page_physload __P((vm_offset_t, vm_offset_t, 349 vm_offset_t, vm_offset_t, int)); 350 void uvm_setpagesize __P((void)); 351 352 /* uvm_pdaemon.c */ 353 void uvm_pageout __P((void)); 354 355 /* uvm_pglist.c */ 356 int uvm_pglistalloc __P((vm_size_t, vm_offset_t, 357 vm_offset_t, vm_offset_t, vm_offset_t, 358 struct pglist *, int, int)); 359 void uvm_pglistfree __P((struct pglist *)); 360 361 /* uvm_swap.c */ 362 void uvm_swap_init __P((void)); 363 364 /* uvm_unix.c */ 365 int uvm_coredump __P((struct proc *, struct vnode *, 366 struct ucred *, struct core *)); 367 int uvm_grow __P((struct proc *, vm_offset_t)); 368 369 /* uvm_user.c */ 370 int uvm_deallocate __P((vm_map_t, vm_offset_t, vm_size_t)); 371 372 /* uvm_vnode.c */ 373 void uvm_vnp_setsize __P((struct vnode *, u_quad_t)); 374 void uvm_vnp_sync __P((struct mount *)); 375 void uvm_vnp_terminate __P((struct vnode *)); 376 /* terminate a uvm/uvn object */ 377 boolean_t uvm_vnp_uncache __P((struct vnode *)); 378 struct uvm_object *uvn_attach __P((void *, vm_prot_t)); 379 380 #endif /* _UVM_UVM_EXTERN_H_ */ 381
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