Annotation of src/sys/uvm/uvm_extern.h, Revision 1.19
1.19 ! eeh 1: /* $NetBSD: uvm_extern.h,v 1.18 1998/08/01 01:39:03 thorpej Exp $ */
1.1 mrg 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.
1.4 mrg 37: *
38: * from: Id: uvm_extern.h,v 1.1.2.21 1998/02/07 01:16:53 chs Exp
1.1 mrg 39: */
40:
1.8 perry 41: #ifndef _UVM_UVM_EXTERN_H_
42: #define _UVM_UVM_EXTERN_H_
1.1 mrg 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 */
1.19 ! eeh 119: #define UVM_UNKNOWN_OFFSET ((vaddr_t) -1)
1.1 mrg 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: /*
1.15 thorpej 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: /*
1.1 mrg 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;
1.10 thorpej 150: struct pmap;
1.1 mrg 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 {
1.9 mrg 159: /* vm_page constants */
1.1 mrg 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:
1.9 mrg 164: /* vm_page counters */
1.1 mrg 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 */
1.3 chs 169: int paging; /* number of pages in the process of being paged out */
1.1 mrg 170: int wired; /* number of wired pages */
1.3 chs 171: int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
172: int reserve_kernel; /* number of pages reserved for kernel */
1.1 mrg 173:
1.9 mrg 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 */
1.1 mrg 179:
1.9 mrg 180: /* swap */
1.1 mrg 181: int nswapdev; /* number of configured swap devices in system */
182: int swpages; /* number of PAGE_SIZE'ed swap pages */
1.3 chs 183: int swpginuse; /* number of swap pages in use */
1.1 mrg 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:
1.9 mrg 188: /* stat counters */
1.7 mrg 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 */
1.1 mrg 202: int forks_ppwait; /* forks where parent waits */
203: int forks_sharevm; /* forks where vmspace is shared */
204:
1.9 mrg 205: /* fault subcounters */
1.1 mrg 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:
1.9 mrg 225: /* daemon counters */
1.1 mrg 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:
1.9 mrg 239: /* kernel memory objects: managed by uvm_km_kmemalloc() only! */
1.1 mrg 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 */
1.19 ! eeh 263: struct uvm_object *uao_create __P((vsize_t, int));
1.1 mrg 264: void uao_detach __P((struct uvm_object *));
265: void uao_reference __P((struct uvm_object *));
266:
267: /* uvm_fault.c */
1.19 ! eeh 268: int uvm_fault __P((vm_map_t, vaddr_t,
1.9 mrg 269: vm_fault_t, vm_prot_t));
1.1 mrg 270: /* handle a page fault */
271:
272: /* uvm_glue.c */
273: #if defined(KGDB)
1.13 kleink 274: void uvm_chgkprot __P((caddr_t, size_t, int));
1.1 mrg 275: #endif
276: void uvm_fork __P((struct proc *, struct proc *, boolean_t));
277: void uvm_init_limits __P((struct proc *));
1.13 kleink 278: boolean_t uvm_kernacc __P((caddr_t, size_t, int));
1.11 mycroft 279: __dead void uvm_scheduler __P((void)) __attribute__((noreturn));
1.1 mrg 280: void uvm_swapin __P((struct proc *));
1.13 kleink 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));
1.1 mrg 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 */
1.19 ! eeh 294: vaddr_t uvm_km_alloc1 __P((vm_map_t, vsize_t, boolean_t));
! 295: void uvm_km_free __P((vm_map_t, vaddr_t, vsize_t));
! 296: void uvm_km_free_wakeup __P((vm_map_t, vaddr_t,
! 297: vsize_t));
! 298: vaddr_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *,
! 299: vsize_t, int));
! 300: struct vm_map *uvm_km_suballoc __P((vm_map_t, vaddr_t *,
! 301: vaddr_t *, vsize_t, boolean_t,
1.6 thorpej 302: boolean_t, vm_map_t));
1.19 ! eeh 303: vaddr_t uvm_km_valloc __P((vm_map_t, vsize_t));
! 304: vaddr_t uvm_km_valloc_wait __P((vm_map_t, vsize_t));
! 305: vaddr_t uvm_km_alloc_poolpage1 __P((vm_map_t,
1.18 thorpej 306: struct uvm_object *));
1.19 ! eeh 307: void uvm_km_free_poolpage1 __P((vm_map_t, vaddr_t));
1.1 mrg 308:
1.18 thorpej 309: #define uvm_km_alloc_poolpage() uvm_km_alloc_poolpage1(kmem_map, \
310: uvmexp.kmem_object)
1.17 thorpej 311: #define uvm_km_free_poolpage(addr) uvm_km_free_poolpage1(kmem_map, (addr))
1.1 mrg 312:
313: /* uvm_map.c */
1.19 ! eeh 314: int uvm_map __P((vm_map_t, vaddr_t *, vsize_t,
! 315: struct uvm_object *, vaddr_t, uvm_flag_t));
! 316: int uvm_map_pageable __P((vm_map_t, vaddr_t,
! 317: vaddr_t, boolean_t));
! 318: boolean_t uvm_map_checkprot __P((vm_map_t, vaddr_t,
! 319: vaddr_t, vm_prot_t));
! 320: int uvm_map_protect __P((vm_map_t, vaddr_t,
! 321: vaddr_t, vm_prot_t, boolean_t));
! 322: struct vmspace *uvmspace_alloc __P((vaddr_t, vaddr_t,
1.10 thorpej 323: boolean_t));
324: void uvmspace_init __P((struct vmspace *, struct pmap *,
1.19 ! eeh 325: vaddr_t, vaddr_t, boolean_t));
1.1 mrg 326: void uvmspace_exec __P((struct proc *));
327: struct vmspace *uvmspace_fork __P((struct vmspace *));
328: void uvmspace_free __P((struct vmspace *));
329: void uvmspace_share __P((struct proc *, struct proc *));
330: void uvmspace_unshare __P((struct proc *));
331:
332:
333: /* uvm_meter.c */
334: void uvm_meter __P((void));
335: int uvm_sysctl __P((int *, u_int, void *, size_t *,
336: void *, size_t, struct proc *));
337:
338: /* uvm_mmap.c */
1.19 ! eeh 339: int uvm_mmap __P((vm_map_t, vaddr_t *, vsize_t,
1.1 mrg 340: vm_prot_t, vm_prot_t, int,
1.19 ! eeh 341: caddr_t, vaddr_t));
1.1 mrg 342:
343: /* uvm_page.c */
1.15 thorpej 344: struct vm_page *uvm_pagealloc_strat __P((struct uvm_object *,
1.19 ! eeh 345: vaddr_t, struct vm_anon *, int, int));
1.15 thorpej 346: #define uvm_pagealloc(obj, off, anon) \
347: uvm_pagealloc_strat((obj), (off), (anon), UVM_PGA_STRAT_NORMAL, 0)
1.1 mrg 348: void uvm_pagerealloc __P((struct vm_page *,
1.19 ! eeh 349: struct uvm_object *, vaddr_t));
! 350: /* Actually, uvm_page_physload takes PF#s which need their own type */
! 351: void uvm_page_physload __P((vaddr_t, vaddr_t,
! 352: vaddr_t, vaddr_t, int));
1.1 mrg 353: void uvm_setpagesize __P((void));
354:
355: /* uvm_pdaemon.c */
356: void uvm_pageout __P((void));
357:
358: /* uvm_pglist.c */
1.19 ! eeh 359: int uvm_pglistalloc __P((psize_t, paddr_t,
! 360: paddr_t, paddr_t, paddr_t,
1.1 mrg 361: struct pglist *, int, int));
362: void uvm_pglistfree __P((struct pglist *));
363:
364: /* uvm_swap.c */
365: void uvm_swap_init __P((void));
366:
367: /* uvm_unix.c */
368: int uvm_coredump __P((struct proc *, struct vnode *,
369: struct ucred *, struct core *));
1.19 ! eeh 370: int uvm_grow __P((struct proc *, vaddr_t));
1.1 mrg 371:
372: /* uvm_user.c */
1.19 ! eeh 373: int uvm_deallocate __P((vm_map_t, vaddr_t, vsize_t));
1.1 mrg 374:
375: /* uvm_vnode.c */
376: void uvm_vnp_setsize __P((struct vnode *, u_quad_t));
377: void uvm_vnp_sync __P((struct mount *));
378: void uvm_vnp_terminate __P((struct vnode *));
379: /* terminate a uvm/uvn object */
380: boolean_t uvm_vnp_uncache __P((struct vnode *));
381: struct uvm_object *uvn_attach __P((void *, vm_prot_t));
382:
1.8 perry 383: #endif /* _UVM_UVM_EXTERN_H_ */
1.19 ! eeh 384:
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