Annotation of src/sys/uvm/uvm_pager.h, Revision 1.4
1.4 ! perry 1: /* $NetBSD: uvm_pager.h,v 1.3 1998/02/07 11:09:29 mrg 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.
1.3 mrg 37: *
38: * from: Id: uvm_pager.h,v 1.1.2.14 1998/01/13 19:00:50 chuck Exp
1.1 mrg 39: */
40:
1.4 ! perry 41: #ifndef _UVM_UVM_PAGER_H_
! 42: #define _UVM_UVM_PAGER_H_
! 43:
1.1 mrg 44: /*
45: * uvm_pager.h
46: */
47:
48: UVMHIST_DECL(maphist);
49:
50:
51: /*
52: * async pager i/o descriptor structure
53: */
54:
55: TAILQ_HEAD(uvm_aiohead, uvm_aiodesc);
56:
57: struct uvm_aiodesc {
58: void (*aiodone) __P((struct uvm_aiodesc *));
59: /* aio done function */
60: vm_offset_t kva; /* KVA of mapped page(s) */
61: int npages; /* # of pages in I/O req */
62: void *pd_ptr; /* pager-dependent pointer */
63: TAILQ_ENTRY(uvm_aiodesc) aioq; /* linked list of aio's */
64: };
65:
66: /*
67: * pager ops
68: */
69:
70: struct uvm_pagerops {
71: void (*pgo_init) __P((void)); /* init pager */
72: struct uvm_object * (*pgo_attach) /* get uvm_object */
73: __P((void *, vm_prot_t));
74: void (*pgo_reference) /* add reference to obj */
75: __P((struct uvm_object *));
76: void (*pgo_detach) /* drop reference to obj */
77: __P((struct uvm_object *));
78: int (*pgo_fault) /* special nonstd fault fn */
79: __P((struct uvm_faultinfo *, vm_offset_t,
80: vm_page_t *, int, int, vm_fault_t,
81: vm_prot_t, int));
82: boolean_t (*pgo_flush) /* flush pages out of obj */
83: __P((struct uvm_object *, vm_offset_t,
84: vm_offset_t, int));
85: int (*pgo_get) /* get/read page */
86: __P((struct uvm_object *, vm_offset_t,
87: vm_page_t *, int *, int, vm_prot_t, int, int));
88: int (*pgo_asyncget) /* start async get */
89: __P((struct uvm_object *, vm_offset_t, int));
90: int (*pgo_put) /* put/write page */
91: __P((struct uvm_object *, vm_page_t *,
92: int, boolean_t));
93: void (*pgo_cluster) /* return range of cluster */
94: __P((struct uvm_object *, vm_offset_t,
95: vm_offset_t *, vm_offset_t *));
96: struct vm_page ** (*pgo_mk_pcluster) /* make "put" cluster */
97: __P((struct uvm_object *, struct vm_page **,
98: int *, struct vm_page *, int, vm_offset_t,
99: vm_offset_t));
100: void (*pgo_shareprot) /* share protect */
101: __P((vm_map_entry_t, vm_prot_t));
102: void (*pgo_aiodone) /* async iodone */
103: __P((struct uvm_aiodesc *));
104: boolean_t (*pgo_releasepg) /* release page */
105: __P((struct vm_page *, struct vm_page **));
106: };
107:
108: /* pager flags [mostly for flush] */
109:
110: #define PGO_CLEANIT 0x001 /* write dirty pages to backing store */
111: #define PGO_SYNCIO 0x002 /* if PGO_CLEAN: use sync I/O? */
112: /*
113: * obviously if neither PGO_INVALIDATE or PGO_FREE are set then the pages
114: * stay where they are.
115: */
116: #define PGO_DEACTIVATE 0x004 /* deactivate flushed pages */
117: #define PGO_FREE 0x008 /* free flushed pages */
118:
119: #define PGO_ALLPAGES 0x010 /* flush whole object/get all pages */
120: #define PGO_DOACTCLUST 0x020 /* flag to mk_pcluster to include active */
121: #define PGO_LOCKED 0x040 /* fault data structures are locked [get] */
122: #define PGO_PDFREECLUST 0x080 /* daemon's free cluster flag [uvm_pager_put] */
123: #define PGO_REALLOCSWAP 0x100 /* reallocate swap area [pager_dropcluster] */
124:
125: /* page we are not interested in getting */
126: #define PGO_DONTCARE ((struct vm_page *) -1) /* [get only] */
127:
128: /*
129: * handle inline options
130: */
131:
132: #ifdef UVM_PAGER_INLINE
133: #define PAGER_INLINE static __inline
134: #else
135: #define PAGER_INLINE /* nothing */
136: #endif /* UVM_PAGER_INLINE */
137:
138: /*
139: * prototypes
140: */
141:
142: void uvm_pager_dropcluster __P((struct uvm_object *,
143: struct vm_page *, struct vm_page **,
144: int *, int, int));
145: void uvm_pager_init __P((void));
146: int uvm_pager_put __P((struct uvm_object *, struct vm_page *,
147: struct vm_page ***, int *, int,
148: vm_offset_t, vm_offset_t));
149:
150: PAGER_INLINE struct vm_page *uvm_pageratop __P((vm_offset_t));
151:
152: vm_offset_t uvm_pagermapin __P((struct vm_page **, int,
153: struct uvm_aiodesc **, int));
154: void uvm_pagermapout __P((vm_offset_t, int));
155: struct vm_page **uvm_mk_pcluster __P((struct uvm_object *, struct vm_page **,
156: int *, struct vm_page *, int,
157: vm_offset_t, vm_offset_t));
158: void uvm_shareprot __P((vm_map_entry_t, vm_prot_t));
159:
1.4 ! perry 160:
! 161: #endif /* _UVM_UVM_PAGER_H_ */
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