uvm_extern.h revision 1.7
1 /* $NetBSD: uvm_extern.h,v 1.7 1998/02/09 13:08:22 mrg 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 * structures 132 */ 133 134 struct core; 135 struct mount; 136 struct pglist; 137 struct proc; 138 struct ucred; 139 struct uio; 140 struct uvm_object; 141 struct vm_anon; 142 struct vmspace; 143 struct vnode; 144 145 /* 146 * uvmexp: global data structures that are exported to parts of the kernel 147 * other than the vm system. 148 */ 149 150 struct uvmexp { 151 /* vm_page constants */ 152 int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */ 153 int pagemask; /* page mask */ 154 int pageshift; /* page shift */ 155 156 /* vm_page counters */ 157 int npages; /* number of pages we manage */ 158 int free; /* number of free pages */ 159 int active; /* number of active pages */ 160 int inactive; /* number of pages that we free'd but may want back */ 161 int paging; /* number of pages in the process of being paged out */ 162 int wired; /* number of wired pages */ 163 int reserve_pagedaemon; /* number of pages reserved for pagedaemon */ 164 int reserve_kernel; /* number of pages reserved for kernel */ 165 166 /* pageout params */ 167 int freemin; /* min number of free pages */ 168 int freetarg; /* target number of free pages */ 169 int inactarg; /* target number of inactive pages */ 170 int wiredmax; /* max number of wired pages */ 171 172 /* swap */ 173 int nswapdev; /* number of configured swap devices in system */ 174 int swpages; /* number of PAGE_SIZE'ed swap pages */ 175 int swpginuse; /* number of swap pages in use */ 176 int nswget; /* number of times fault calls uvm_swap_get() */ 177 int nanon; /* number total of anon's in system */ 178 int nfreeanon; /* number of free anon's */ 179 180 /* stat counters */ 181 int faults; /* page fault count */ 182 int traps; /* trap count */ 183 int intrs; /* interrupt count */ 184 int swtch; /* context switch count */ 185 int softs; /* software interrupt count */ 186 int syscalls; /* system calls */ 187 int pageins; /* pagein operation count */ 188 /* pageouts are in pdpageouts below */ 189 int swapins; /* swapins */ 190 int swapouts; /* swapouts */ 191 int pgswapin; /* pages swapped in */ 192 int pgswapout; /* pages swapped out */ 193 int forks; /* forks */ 194 int forks_ppwait; /* forks where parent waits */ 195 int forks_sharevm; /* forks where vmspace is shared */ 196 197 /* fault subcounters */ 198 int fltnoram; /* number of times fault was out of ram */ 199 int fltnoanon; /* number of times fault was out of anons */ 200 int fltpgwait; /* number of times fault had to wait on a page */ 201 int fltpgrele; /* number of times fault found a released page */ 202 int fltrelck; /* number of times fault relock called */ 203 int fltrelckok; /* number of times fault relock is a success */ 204 int fltanget; /* number of times fault gets anon page */ 205 int fltanretry; /* number of times fault retrys an anon get */ 206 int fltamcopy; /* number of times fault clears "needs copy" */ 207 int fltnamap; /* number of times fault maps a neighbor anon page */ 208 int fltnomap; /* number of times fault maps a neighbor obj page */ 209 int fltlget; /* number of times fault does a locked pgo_get */ 210 int fltget; /* number of times fault does an unlocked get */ 211 int flt_anon; /* number of times fault anon (case 1a) */ 212 int flt_acow; /* number of times fault anon cow (case 1b) */ 213 int flt_obj; /* number of times fault is on object page (2a) */ 214 int flt_prcopy; /* number of times fault promotes with copy (2b) */ 215 int flt_przero; /* number of times fault promotes with zerofill (2b) */ 216 217 /* daemon counters */ 218 int pdwoke; /* number of times daemon woke up */ 219 int pdrevs; /* number of times daemon rev'd clock hand */ 220 int pdswout; /* number of times daemon called for swapout */ 221 int pdfreed; /* number of pages daemon freed since boot */ 222 int pdscans; /* number of pages daemon scaned since boot */ 223 int pdanscan; /* number of anonymous pages scanned by daemon */ 224 int pdobscan; /* number of object pages scanned by daemon */ 225 int pdreact; /* number of pages daemon reactivated since boot */ 226 int pdbusy; /* number of times daemon found a busy page */ 227 int pdpageouts; /* number of times daemon started a pageout */ 228 int pdpending; /* number of times daemon got a pending pagout */ 229 int pddeact; /* number of pages daemon deactivates */ 230 231 /* kernel memory objects: managed by uvm_km_kmemalloc() only! */ 232 struct uvm_object *kmem_object; 233 struct uvm_object *mb_object; 234 }; 235 236 237 extern struct uvmexp uvmexp; 238 239 /* 240 * macros 241 */ 242 243 /* zalloc zeros memory, alloc does not */ 244 #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE) 245 #define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE) 246 247 /* 248 * typedefs 249 */ 250 251 typedef unsigned int uvm_flag_t; 252 typedef int vm_fault_t; 253 254 /* uvm_aobj.c */ 255 struct uvm_object *uao_create __P((vm_size_t, int)); 256 void uao_detach __P((struct uvm_object *)); 257 void uao_reference __P((struct uvm_object *)); 258 259 /* uvm_fault.c */ 260 int uvm_fault __P((vm_map_t, vm_offset_t, 261 vm_fault_t, vm_prot_t)); 262 /* handle a page fault */ 263 264 /* uvm_glue.c */ 265 #if defined(KGDB) 266 void uvm_chgkprot __P((caddr_t, int, int)); 267 #endif 268 void uvm_fork __P((struct proc *, struct proc *, boolean_t)); 269 void uvm_init_limits __P((struct proc *)); 270 boolean_t uvm_kernacc __P((caddr_t, int, int)); 271 void uvm_scheduler __P((void)); 272 void uvm_swapin __P((struct proc *)); 273 boolean_t uvm_useracc __P((caddr_t, int, int)); 274 void uvm_vslock __P((caddr_t, u_int)); 275 void uvm_vsunlock __P((caddr_t, u_int)); 276 277 278 /* uvm_init.c */ 279 void uvm_init __P((void)); 280 /* init the uvm system */ 281 282 /* uvm_io.c */ 283 int uvm_io __P((vm_map_t, struct uio *)); 284 285 /* uvm_km.c */ 286 vm_offset_t uvm_km_alloc1 __P((vm_map_t, vm_size_t, boolean_t)); 287 void uvm_km_free __P((vm_map_t, vm_offset_t, vm_size_t)); 288 void uvm_km_free_wakeup __P((vm_map_t, vm_offset_t, 289 vm_size_t)); 290 vm_offset_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *, 291 vm_size_t, int)); 292 struct vm_map *uvm_km_suballoc __P((vm_map_t, vm_offset_t *, 293 vm_offset_t *, vm_size_t, boolean_t, 294 boolean_t, vm_map_t)); 295 vm_offset_t uvm_km_valloc __P((vm_map_t, vm_size_t)); 296 vm_offset_t uvm_km_valloc_wait __P((vm_map_t, vm_size_t)); 297 298 299 /* uvm_map.c */ 300 int uvm_map __P((vm_map_t, vm_offset_t *, vm_size_t, 301 struct uvm_object *, vm_offset_t, uvm_flag_t)); 302 int uvm_map_pageable __P((vm_map_t, vm_offset_t, 303 vm_offset_t, boolean_t)); 304 boolean_t uvm_map_checkprot __P((vm_map_t, vm_offset_t, 305 vm_offset_t, vm_prot_t)); 306 #if defined(DDB) 307 void uvm_map_print __P((vm_map_t, boolean_t)); 308 void uvm_map_printit __P((vm_map_t, boolean_t, 309 void (*) __P((const char *, ...)))); 310 #endif 311 int uvm_map_protect __P((vm_map_t, vm_offset_t, 312 vm_offset_t, vm_prot_t, boolean_t)); 313 #if defined(DDB) 314 void uvm_object_print __P((struct uvm_object *, boolean_t)); 315 void uvm_object_printit __P((struct uvm_object *, boolean_t, 316 void (*) __P((const char *, ...)))); 317 void uvm_page_print __P((struct vm_page *, boolean_t)); 318 void uvm_page_printit __P((struct vm_page *, boolean_t, 319 void (*) __P((const char *, ...)))); 320 #endif 321 struct vmspace *uvmspace_alloc __P((vm_offset_t, vm_offset_t, int)); 322 void uvmspace_exec __P((struct proc *)); 323 struct vmspace *uvmspace_fork __P((struct vmspace *)); 324 void uvmspace_free __P((struct vmspace *)); 325 void uvmspace_share __P((struct proc *, struct proc *)); 326 void uvmspace_unshare __P((struct proc *)); 327 328 329 /* uvm_meter.c */ 330 void uvm_meter __P((void)); 331 int uvm_sysctl __P((int *, u_int, void *, size_t *, 332 void *, size_t, struct proc *)); 333 334 /* uvm_mmap.c */ 335 int uvm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t, 336 vm_prot_t, vm_prot_t, int, 337 caddr_t, vm_offset_t)); 338 339 /* uvm_page.c */ 340 struct vm_page *uvm_pagealloc __P((struct uvm_object *, vm_offset_t, 341 struct vm_anon *)); 342 void uvm_pagerealloc __P((struct vm_page *, 343 struct uvm_object *, vm_offset_t)); 344 void uvm_page_physload __P((vm_offset_t, vm_offset_t, 345 vm_offset_t, vm_offset_t)); 346 void uvm_setpagesize __P((void)); 347 348 /* uvm_pdaemon.c */ 349 void uvm_pageout __P((void)); 350 351 /* uvm_pglist.c */ 352 int uvm_pglistalloc __P((vm_size_t, vm_offset_t, 353 vm_offset_t, vm_offset_t, vm_offset_t, 354 struct pglist *, int, int)); 355 void uvm_pglistfree __P((struct pglist *)); 356 357 /* uvm_swap.c */ 358 void uvm_swap_init __P((void)); 359 360 /* uvm_unix.c */ 361 int uvm_coredump __P((struct proc *, struct vnode *, 362 struct ucred *, struct core *)); 363 int uvm_grow __P((struct proc *, vm_offset_t)); 364 365 /* uvm_user.c */ 366 int uvm_deallocate __P((vm_map_t, vm_offset_t, vm_size_t)); 367 368 /* uvm_vnode.c */ 369 void uvm_vnp_setsize __P((struct vnode *, u_quad_t)); 370 void uvm_vnp_sync __P((struct mount *)); 371 void uvm_vnp_terminate __P((struct vnode *)); 372 /* terminate a uvm/uvn object */ 373 boolean_t uvm_vnp_uncache __P((struct vnode *)); 374 struct uvm_object *uvn_attach __P((void *, vm_prot_t)); 375 376 #endif 377
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