Annotation of src/sys/uvm/uvm_extern.h, Revision 1.11
1.11 ! mycroft 1: /* $NetBSD: uvm_extern.h,v 1.10 1998/03/27 01:47:06 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 */
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;
1.10 thorpej 143: struct pmap;
1.1 mrg 144: struct vnode;
145:
146: /*
147: * uvmexp: global data structures that are exported to parts of the kernel
148: * other than the vm system.
149: */
150:
151: struct uvmexp {
1.9 mrg 152: /* vm_page constants */
1.1 mrg 153: int pagesize; /* size of a page (PAGE_SIZE): must be power of 2 */
154: int pagemask; /* page mask */
155: int pageshift; /* page shift */
156:
1.9 mrg 157: /* vm_page counters */
1.1 mrg 158: int npages; /* number of pages we manage */
159: int free; /* number of free pages */
160: int active; /* number of active pages */
161: int inactive; /* number of pages that we free'd but may want back */
1.3 chs 162: int paging; /* number of pages in the process of being paged out */
1.1 mrg 163: int wired; /* number of wired pages */
1.3 chs 164: int reserve_pagedaemon; /* number of pages reserved for pagedaemon */
165: int reserve_kernel; /* number of pages reserved for kernel */
1.1 mrg 166:
1.9 mrg 167: /* pageout params */
168: int freemin; /* min number of free pages */
169: int freetarg; /* target number of free pages */
170: int inactarg; /* target number of inactive pages */
171: int wiredmax; /* max number of wired pages */
1.1 mrg 172:
1.9 mrg 173: /* swap */
1.1 mrg 174: int nswapdev; /* number of configured swap devices in system */
175: int swpages; /* number of PAGE_SIZE'ed swap pages */
1.3 chs 176: int swpginuse; /* number of swap pages in use */
1.1 mrg 177: int nswget; /* number of times fault calls uvm_swap_get() */
178: int nanon; /* number total of anon's in system */
179: int nfreeanon; /* number of free anon's */
180:
1.9 mrg 181: /* stat counters */
1.7 mrg 182: int faults; /* page fault count */
183: int traps; /* trap count */
184: int intrs; /* interrupt count */
185: int swtch; /* context switch count */
186: int softs; /* software interrupt count */
187: int syscalls; /* system calls */
188: int pageins; /* pagein operation count */
189: /* pageouts are in pdpageouts below */
190: int swapins; /* swapins */
191: int swapouts; /* swapouts */
192: int pgswapin; /* pages swapped in */
193: int pgswapout; /* pages swapped out */
194: int forks; /* forks */
1.1 mrg 195: int forks_ppwait; /* forks where parent waits */
196: int forks_sharevm; /* forks where vmspace is shared */
197:
1.9 mrg 198: /* fault subcounters */
1.1 mrg 199: int fltnoram; /* number of times fault was out of ram */
200: int fltnoanon; /* number of times fault was out of anons */
201: int fltpgwait; /* number of times fault had to wait on a page */
202: int fltpgrele; /* number of times fault found a released page */
203: int fltrelck; /* number of times fault relock called */
204: int fltrelckok; /* number of times fault relock is a success */
205: int fltanget; /* number of times fault gets anon page */
206: int fltanretry; /* number of times fault retrys an anon get */
207: int fltamcopy; /* number of times fault clears "needs copy" */
208: int fltnamap; /* number of times fault maps a neighbor anon page */
209: int fltnomap; /* number of times fault maps a neighbor obj page */
210: int fltlget; /* number of times fault does a locked pgo_get */
211: int fltget; /* number of times fault does an unlocked get */
212: int flt_anon; /* number of times fault anon (case 1a) */
213: int flt_acow; /* number of times fault anon cow (case 1b) */
214: int flt_obj; /* number of times fault is on object page (2a) */
215: int flt_prcopy; /* number of times fault promotes with copy (2b) */
216: int flt_przero; /* number of times fault promotes with zerofill (2b) */
217:
1.9 mrg 218: /* daemon counters */
1.1 mrg 219: int pdwoke; /* number of times daemon woke up */
220: int pdrevs; /* number of times daemon rev'd clock hand */
221: int pdswout; /* number of times daemon called for swapout */
222: int pdfreed; /* number of pages daemon freed since boot */
223: int pdscans; /* number of pages daemon scaned since boot */
224: int pdanscan; /* number of anonymous pages scanned by daemon */
225: int pdobscan; /* number of object pages scanned by daemon */
226: int pdreact; /* number of pages daemon reactivated since boot */
227: int pdbusy; /* number of times daemon found a busy page */
228: int pdpageouts; /* number of times daemon started a pageout */
229: int pdpending; /* number of times daemon got a pending pagout */
230: int pddeact; /* number of pages daemon deactivates */
231:
1.9 mrg 232: /* kernel memory objects: managed by uvm_km_kmemalloc() only! */
1.1 mrg 233: struct uvm_object *kmem_object;
234: struct uvm_object *mb_object;
235: };
236:
237:
238: extern struct uvmexp uvmexp;
239:
240: /*
241: * macros
242: */
243:
244: /* zalloc zeros memory, alloc does not */
245: #define uvm_km_zalloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,TRUE)
246: #define uvm_km_alloc(MAP,SIZE) uvm_km_alloc1(MAP,SIZE,FALSE)
247:
248: /*
249: * typedefs
250: */
251:
252: typedef unsigned int uvm_flag_t;
253: typedef int vm_fault_t;
254:
255: /* uvm_aobj.c */
256: struct uvm_object *uao_create __P((vm_size_t, int));
257: void uao_detach __P((struct uvm_object *));
258: void uao_reference __P((struct uvm_object *));
259:
260: /* uvm_fault.c */
261: int uvm_fault __P((vm_map_t, vm_offset_t,
1.9 mrg 262: vm_fault_t, vm_prot_t));
1.1 mrg 263: /* handle a page fault */
264:
265: /* uvm_glue.c */
266: #if defined(KGDB)
267: void uvm_chgkprot __P((caddr_t, int, int));
268: #endif
269: void uvm_fork __P((struct proc *, struct proc *, boolean_t));
270: void uvm_init_limits __P((struct proc *));
271: boolean_t uvm_kernacc __P((caddr_t, int, int));
1.11 ! mycroft 272: __dead void uvm_scheduler __P((void)) __attribute__((noreturn));
1.1 mrg 273: void uvm_swapin __P((struct proc *));
274: boolean_t uvm_useracc __P((caddr_t, int, int));
275: void uvm_vslock __P((caddr_t, u_int));
276: void uvm_vsunlock __P((caddr_t, u_int));
277:
278:
279: /* uvm_init.c */
280: void uvm_init __P((void));
281: /* init the uvm system */
282:
283: /* uvm_io.c */
284: int uvm_io __P((vm_map_t, struct uio *));
285:
286: /* uvm_km.c */
287: vm_offset_t uvm_km_alloc1 __P((vm_map_t, vm_size_t, boolean_t));
288: void uvm_km_free __P((vm_map_t, vm_offset_t, vm_size_t));
289: void uvm_km_free_wakeup __P((vm_map_t, vm_offset_t,
290: vm_size_t));
291: vm_offset_t uvm_km_kmemalloc __P((vm_map_t, struct uvm_object *,
292: vm_size_t, int));
293: struct vm_map *uvm_km_suballoc __P((vm_map_t, vm_offset_t *,
294: vm_offset_t *, vm_size_t, boolean_t,
1.6 thorpej 295: boolean_t, vm_map_t));
1.1 mrg 296: vm_offset_t uvm_km_valloc __P((vm_map_t, vm_size_t));
297: vm_offset_t uvm_km_valloc_wait __P((vm_map_t, vm_size_t));
298:
299:
300: /* uvm_map.c */
301: int uvm_map __P((vm_map_t, vm_offset_t *, vm_size_t,
302: struct uvm_object *, vm_offset_t, uvm_flag_t));
303: int uvm_map_pageable __P((vm_map_t, vm_offset_t,
304: vm_offset_t, boolean_t));
1.3 chs 305: boolean_t uvm_map_checkprot __P((vm_map_t, vm_offset_t,
306: vm_offset_t, vm_prot_t));
1.1 mrg 307: #if defined(DDB)
308: void uvm_map_print __P((vm_map_t, boolean_t));
309: void uvm_map_printit __P((vm_map_t, boolean_t,
310: void (*) __P((const char *, ...))));
311: #endif
312: int uvm_map_protect __P((vm_map_t, vm_offset_t,
313: vm_offset_t, vm_prot_t, boolean_t));
314: #if defined(DDB)
315: void uvm_object_print __P((struct uvm_object *, boolean_t));
316: void uvm_object_printit __P((struct uvm_object *, boolean_t,
317: void (*) __P((const char *, ...))));
318: void uvm_page_print __P((struct vm_page *, boolean_t));
319: void uvm_page_printit __P((struct vm_page *, boolean_t,
320: void (*) __P((const char *, ...))));
321: #endif
1.10 thorpej 322: struct vmspace *uvmspace_alloc __P((vm_offset_t, vm_offset_t,
323: boolean_t));
324: void uvmspace_init __P((struct vmspace *, struct pmap *,
325: vm_offset_t, vm_offset_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 */
339: int uvm_mmap __P((vm_map_t, vm_offset_t *, vm_size_t,
340: vm_prot_t, vm_prot_t, int,
341: caddr_t, vm_offset_t));
342:
343: /* uvm_page.c */
344: struct vm_page *uvm_pagealloc __P((struct uvm_object *, vm_offset_t,
345: struct vm_anon *));
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));
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:
1.8 perry 380: #endif /* _UVM_UVM_EXTERN_H_ */
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