uvm_extern.h revision 1.3
1 /* $NetBSD: uvm_extern.h,v 1.3 1998/02/07 02:24:02 chs 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 39 #ifndef UVM_UVM_EXTERN_H 40 #define UVM_UVM_EXTERN_H 41 42 /* 43 * uvm_extern.h: this file defines the external interface to the VM system. 44 * 45 * this should be the only file included by non-VM parts of the kernel 46 * which need access to VM services. if you want to know the interface 47 * to the MI VM layer without knowing the details, this is the file to 48 * learn. 49 * 50 * NOTE: vm system calls are prototyped in syscallargs.h 51 */ 52 53 /* 54 * defines 55 */ 56 57 /* 58 * the following defines are for uvm_map and functions which call it. 59 */ 60 61 /* protections bits */ 62 #define UVM_PROT_MASK 0x07 /* protection mask */ 63 #define UVM_PROT_NONE 0x00 /* protection none */ 64 #define UVM_PROT_ALL 0x07 /* everything */ 65 #define UVM_PROT_READ 0x01 /* read */ 66 #define UVM_PROT_WRITE 0x02 /* write */ 67 #define UVM_PROT_EXEC 0x04 /* exec */ 68 69 /* protection short codes */ 70 #define UVM_PROT_R 0x01 /* read */ 71 #define UVM_PROT_W 0x02 /* write */ 72 #define UVM_PROT_RW 0x03 /* read-write */ 73 #define UVM_PROT_X 0x04 /* exec */ 74 #define UVM_PROT_RX 0x05 /* read-exec */ 75 #define UVM_PROT_WX 0x06 /* write-exec */ 76 #define UVM_PROT_RWX 0x07 /* read-write-exec */ 77 78 /* 0x08: not used */ 79 80 /* inherit codes */ 81 #define UVM_INH_MASK 0x30 /* inherit mask */ 82 #define UVM_INH_SHARE 0x00 /* "share" */ 83 #define UVM_INH_COPY 0x10 /* "copy" */ 84 #define UVM_INH_NONE 0x20 /* "none" */ 85 #define UVM_INH_DONATE 0x30 /* "donate" << not used */ 86 87 /* 0x40, 0x80: not used */ 88 89 /* bits 0x700: max protection, 0x800: not used */ 90 91 /* bits 0x7000: advice, 0x8000: not used */ 92 /* advice: matches MADV_* from sys/mman.h */ 93 #define UVM_ADV_NORMAL 0x0 /* 'normal' */ 94 #define UVM_ADV_RANDOM 0x1 /* 'random' */ 95 #define UVM_ADV_SEQUENTIAL 0x2 /* 'sequential' */ 96 /* 0x3: will need, 0x4: dontneed */ 97 #define UVM_ADV_MASK 0x7 /* mask */ 98 99 /* mapping flags */ 100 #define UVM_FLAG_FIXED 0x010000 /* find space */ 101 #define UVM_FLAG_OVERLAY 0x020000 /* establish overlay */ 102 #define UVM_FLAG_NOMERGE 0x040000 /* don't merge map entries */ 103 #define UVM_FLAG_COPYONW 0x080000 /* set copy_on_write flag */ 104 #define UVM_FLAG_AMAPPAD 0x100000 /* for bss: pad amap to reduce malloc() */ 105 #define UVM_FLAG_TRYLOCK 0x200000 /* fail if we can not lock map */ 106 107 /* macros to extract info */ 108 #define UVM_PROTECTION(X) ((X) & UVM_PROT_MASK) 109 #define UVM_INHERIT(X) (((X) & UVM_INH_MASK) >> 4) 110 #define UVM_MAXPROTECTION(X) (((X) >> 8) & UVM_PROT_MASK) 111 #define UVM_ADVICE(X) (((X) >> 12) & UVM_ADV_MASK) 112 113 #define UVM_MAPFLAG(PROT,MAXPROT,INH,ADVICE,FLAGS) \ 114 ((MAXPROT << 8)|(PROT)|(INH)|((ADVICE) << 12)|(FLAGS)) 115 116 /* magic offset value */ 117 #define UVM_UNKNOWN_OFFSET ((vm_offset_t) -1) 118 /* offset not known(obj) or don't care(!obj) */ 119 120 /* 121 * the following defines are for uvm_km_kmemalloc's flags 122 */ 123 124 #define UVM_KMF_NOWAIT 0x1 /* matches M_NOWAIT */ 125 #define UVM_KMF_VALLOC 0x2 /* allocate VA only */ 126 #define UVM_KMF_TRYLOCK UVM_FLAG_TRYLOCK /* try locking only */ 127 128 /* 129 * structures 130 */ 131 132 struct core; 133 struct mount; 134 struct pglist; 135 struct proc; 136 struct ucred; 137 struct uio; 138 struct uvm_object; 139 struct vm_anon; 140 struct vmspace; 141 struct vnode; 142 143 /* 144 * uvmexp: global data structures that are exported to parts of the kernel 145 * other than the vm system. 146 */ 147 148 struct uvmexp { 149 /* vm_page constants */ 150 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 151 int pagemask; /* page mask */ 152 int pageshift; /* page shift */ 153 154 /* vm_page counters */ 155 int npages; /* number of pages we manage */ 156 int free; /* number of free pages */ 157 int active; /* number of active pages */ 158 int inactive; /* number of pages that we free'd but may want back */ 159 int paging; /* number of pages in the process of being paged out */ 160 int wired; /* number of wired pages */ 161 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 162 int reserve_kernel; /* number of pages reserved for kernel */ 163 164 /* pageout params */ 165 int freemin; /* min number of free pages */ 166 int freetarg; /* target number of free pages */ 167 int inactarg; /* target number of inactive pages */ 168 int wiredmax; /* max number of wired pages */ 169 170 /* swap */ 171 int nswapdev; /* number of configured swap devices in system */ 172 int swpages; /* number of PAGE_SIZE'ed swap pages */ 173 int swpginuse; /* number of swap pages in use */ 174 int nswget; /* number of times fault calls uvm_swap_get() */ 175 int nanon; /* number total of anon's in system */ 176 int nfreeanon; /* number of free anon's */ 177 178 /* stat counters */ 179 int faults; /* page fault count */ 180 int traps; /* trap count */ 181 int intrs; /* interrupt count */ 182 int swtch; /* context switch count */ 183 int softs; /* software interrupt count */ 184 int syscalls; /* system calls */ 185 int swapins; /* swapins */ 186 int swapouts; /* swapouts */ 187 int forks; /* forks */ 188 int forks_ppwait; /* forks where parent waits */ 189 int forks_sharevm; /* forks where vmspace is shared */ 190 191 192 /* fault subcounters */ 193 int fltnoram; /* number of times fault was out of ram */ 194 int fltnoanon; /* number of times fault was out of anons */ 195 int fltpgwait; /* number of times fault had to wait on a page */ 196 int fltpgrele; /* number of times fault found a released page */ 197 int fltrelck; /* number of times fault relock called */ 198 int fltrelckok; /* number of times fault relock is a success */ 199 int fltanget; /* number of times fault gets anon page */ 200 int fltanretry; /* number of times fault retrys an anon get */ 201 int fltamcopy; /* number of times fault clears "needs copy" */ 202 int fltnamap; /* number of times fault maps a neighbor anon page */ 203 int fltnomap; /* number of times fault maps a neighbor obj page */ 204 int fltlget; /* number of times fault does a locked pgo_get */ 205 int fltget; /* number of times fault does an unlocked get */ 206 int flt_anon; /* number of times fault anon (case 1a) */ 207 int flt_acow; /* number of times fault anon cow (case 1b) */ 208 int flt_obj; /* number of times fault is on object page (2a) */ 209 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 210 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 211 212 /* daemon counters */ 213 int pdwoke; /* number of times daemon woke up */ 214 int pdrevs; /* number of times daemon rev'd clock hand */ 215 int pdswout; /* number of times daemon called for swapout */ 216 int pdfreed; /* number of pages daemon freed since boot */ 217 int pdscans; /* number of pages daemon scaned since boot */ 218 int pdanscan; /* number of anonymous pages scanned by daemon */ 219 int pdobscan; /* number of object pages scanned by daemon */ 220 int pdreact; /* number of pages daemon reactivated since boot */ 221 int pdbusy; /* number of times daemon found a busy page */ 222 int pdpageouts; /* number of times daemon started a pageout */ 223 int pdpending; /* number of times daemon got a pending pagout */ 224 int pddeact; /* number of pages daemon deactivates */ 225 226 /* kernel memory objects: managed by uvm_km_kmemalloc() only! */ 227 struct uvm_object *kmem_object; 228 struct uvm_object *mb_object; 229 }; 230 231 232 extern struct uvmexp uvmexp; 233 234 /* 235 * macros 236 */ 237 238 /* zalloc zeros memory, alloc does not */ 239 #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE) 240 #define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE) 241 242 /* 243 * typedefs 244 */ 245 246 typedef unsigned int uvm_flag_t; 247 typedef int vm_fault_t; 248 249 /* uvm_aobj.c */ 250 struct uvm_object *uao_create __P((vm_size_t, int)); 251 void uao_detach __P((struct uvm_object *)); 252 void uao_reference __P((struct uvm_object *)); 253 254 /* uvm_fault.c */ 255 int uvm_fault __P((vm_map_t, vm_offset_t, 256 vm_fault_t, vm_prot_t)); 257 /* handle a page fault */ 258 259 /* uvm_glue.c */ 260 #if defined(KGDB) 261 void uvm_chgkprot __P((caddr_t, int, int)); 262 #endif 263 void uvm_fork __P((struct proc *, struct proc *, boolean_t)); 264 void uvm_init_limits __P((struct proc *)); 265 boolean_t uvm_kernacc __P((caddr_t, int, int)); 266 void uvm_scheduler __P((void)); 267 void uvm_swapin __P((struct proc *)); 268 boolean_t uvm_useracc __P((caddr_t, int, int)); 269 void uvm_vslock __P((caddr_t, u_int)); 270 void uvm_vsunlock __P((caddr_t, u_int)); 271 272 273 /* uvm_init.c */ 274 void uvm_init __P((void)); 275 /* init the uvm system */ 276 277 /* uvm_io.c */ 278 int uvm_io __P((vm_map_t, struct uio *)); 279 280 /* uvm_km.c */ 281 vm_offset_t uvm_km_alloc1 __P((vm_map_t, vm_size_t, boolean_t)); 282 void uvm_km_free __P((vm_map_t, vm_offset_t, vm_size_t)); 283 void uvm_km_free_wakeup __P((vm_map_t, vm_offset_t, 284 vm_size_t)); 285 vm_offset_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *, 286 vm_size_t, int)); 287 struct vm_map *uvm_km_suballoc __P((vm_map_t, vm_offset_t *, 288 vm_offset_t *, vm_size_t, boolean_t, 289 vm_map_t)); 290 vm_offset_t uvm_km_valloc __P((vm_map_t, vm_size_t)); 291 vm_offset_t uvm_km_valloc_wait __P((vm_map_t, vm_size_t)); 292 293 294 /* uvm_map.c */ 295 int uvm_map __P((vm_map_t, vm_offset_t *, vm_size_t, 296 struct uvm_object *, vm_offset_t, uvm_flag_t)); 297 int uvm_map_pageable __P((vm_map_t, vm_offset_t, 298 vm_offset_t, boolean_t)); 299 boolean_t uvm_map_checkprot __P((vm_map_t, vm_offset_t, 300 vm_offset_t, vm_prot_t)); 301 #if defined(DDB) 302 void uvm_map_print __P((vm_map_t, boolean_t)); 303 void uvm_map_printit __P((vm_map_t, boolean_t, 304 void (*) __P((const char *, ...)))); 305 #endif 306 int uvm_map_protect __P((vm_map_t, vm_offset_t, 307 vm_offset_t, vm_prot_t, boolean_t)); 308 #if defined(DDB) 309 void uvm_object_print __P((struct uvm_object *, boolean_t)); 310 void uvm_object_printit __P((struct uvm_object *, boolean_t, 311 void (*) __P((const char *, ...)))); 312 void uvm_page_print __P((struct vm_page *, boolean_t)); 313 void uvm_page_printit __P((struct vm_page *, boolean_t, 314 void (*) __P((const char *, ...)))); 315 #endif 316 struct vmspace *uvmspace_alloc __P((vm_offset_t, vm_offset_t, int)); 317 void uvmspace_exec __P((struct proc *)); 318 struct vmspace *uvmspace_fork __P((struct vmspace *)); 319 void uvmspace_free __P((struct vmspace *)); 320 void uvmspace_share __P((struct proc *, struct proc *)); 321 void uvmspace_unshare __P((struct proc *)); 322 323 324 /* uvm_meter.c */ 325 void uvm_meter __P((void)); 326 int uvm_sysctl __P((int *, u_int, void *, size_t *, 327 void *, size_t, struct proc *)); 328 329 /* uvm_mmap.c */ 330 int uvm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t, 331 vm_prot_t, vm_prot_t, int, 332 caddr_t, vm_offset_t)); 333 334 /* uvm_page.c */ 335 struct vm_page *uvm_pagealloc __P((struct uvm_object *, vm_offset_t, 336 struct vm_anon *)); 337 void uvm_pagerealloc __P((struct vm_page *, 338 struct uvm_object *, vm_offset_t)); 339 void uvm_page_physload __P((vm_offset_t, vm_offset_t, 340 vm_offset_t, vm_offset_t)); 341 void uvm_setpagesize __P((void)); 342 343 /* uvm_pdaemon.c */ 344 void uvm_pageout __P((void)); 345 346 /* uvm_pglist.c */ 347 int uvm_pglistalloc __P((vm_size_t, vm_offset_t, 348 vm_offset_t, vm_offset_t, vm_offset_t, 349 struct pglist *, int, int)); 350 void uvm_pglistfree __P((struct pglist *)); 351 352 /* uvm_swap.c */ 353 void uvm_swap_init __P((void)); 354 355 /* uvm_unix.c */ 356 int uvm_coredump __P((struct proc *, struct vnode *, 357 struct ucred *, struct core *)); 358 int uvm_grow __P((struct proc *, vm_offset_t)); 359 360 /* uvm_user.c */ 361 int uvm_deallocate __P((vm_map_t, vm_offset_t, vm_size_t)); 362 363 /* uvm_vnode.c */ 364 void uvm_vnp_setsize __P((struct vnode *, u_quad_t)); 365 void uvm_vnp_sync __P((struct mount *)); 366 void uvm_vnp_terminate __P((struct vnode *)); 367 /* terminate a uvm/uvn object */ 368 boolean_t uvm_vnp_uncache __P((struct vnode *)); 369 struct uvm_object *uvn_attach __P((void *, vm_prot_t)); 370 371 #endif 372
Indexes created Sat Sep 20 22:09:52 GMT 2025