FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm.h
1 /* $NetBSD: uvm.h,v 1.44 2006/09/15 15:51:12 yamt Exp $ */
2
3 /*
4 *
5 * Copyright (c) 1997 Charles D. Cranor and Washington University.
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by Charles D. Cranor and
19 * Washington University.
20 * 4. The name of the author may not be used to endorse or promote products
21 * derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 *
34 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
35 */
36
37 #ifndef _UVM_UVM_H_
38 #define _UVM_UVM_H_
39
40 #if defined(_KERNEL_OPT)
41 #include "opt_lockdebug.h"
42 #include "opt_multiprocessor.h"
43 #include "opt_uvmhist.h"
44 #endif
45
46 #include <uvm/uvm_extern.h>
47
48 #include <uvm/uvm_stat.h>
49
50 /*
51 * pull in prototypes
52 */
53
54 #include <uvm/uvm_amap.h>
55 #include <uvm/uvm_aobj.h>
56 #include <uvm/uvm_fault.h>
57 #include <uvm/uvm_glue.h>
58 #include <uvm/uvm_km.h>
59 #include <uvm/uvm_loan.h>
60 #include <uvm/uvm_map.h>
61 #include <uvm/uvm_object.h>
62 #include <uvm/uvm_page.h>
63 #include <uvm/uvm_pager.h>
64 #include <uvm/uvm_pdaemon.h>
65 #include <uvm/uvm_swap.h>
66
67 #ifdef _KERNEL
68
69 /*
70 * pull in VM_NFREELIST
71 */
72 #include <machine/vmparam.h>
73
74 /*
75 * uvm structure (vm global state: collected in one structure for ease
76 * of reference...)
77 */
78
79 struct uvm {
80 /* vm_page related parameters */
81
82 /* vm_page queues */
83 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
84 int page_free_nextcolor; /* next color to allocate from */
85 struct simplelock pageqlock; /* lock for active/inactive page q */
86 struct simplelock fpageqlock; /* lock for free page q */
87 boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
88 boolean_t page_idle_zero; /* TRUE if we should try to zero
89 pages in the idle loop */
90
91 /* page daemon trigger */
92 int pagedaemon; /* daemon sleeps on this */
93 struct proc *pagedaemon_proc; /* daemon's pid */
94 struct simplelock pagedaemon_lock;
95
96 /* aiodone daemon trigger */
97 int aiodoned; /* daemon sleeps on this */
98 struct proc *aiodoned_proc; /* daemon's pid */
99 struct simplelock aiodoned_lock;
100
101 /* page hash */
102 struct pglist *page_hash; /* page hash table (vp/off->page) */
103 int page_nhash; /* number of buckets */
104 int page_hashmask; /* hash mask */
105 struct simplelock hashlock; /* lock on page_hash array */
106
107 struct simplelock kentry_lock;
108
109 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */
110 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
111
112 /* swap-related items */
113 struct simplelock swap_data_lock;
114
115 /* kernel object: to support anonymous pageable kernel memory */
116 struct uvm_object *kernel_object;
117 };
118
119 #endif /* _KERNEL */
120
121 /*
122 * vm_map_entry etype bits:
123 */
124
125 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */
126 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */
127 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */
128 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */
129
130 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
131 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
132 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
133 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
134
135 #ifdef _KERNEL
136
137 /*
138 * holds all the internal UVM data
139 */
140 extern struct uvm uvm;
141
142 /*
143 * historys
144 */
145
146 #ifdef UVMHIST
147 UVMHIST_DECL(maphist);
148 UVMHIST_DECL(pdhist);
149 UVMHIST_DECL(ubchist);
150 UVMHIST_DECL(loanhist);
151 #endif
152
153 extern struct evcnt uvm_ra_total;
154 extern struct evcnt uvm_ra_hit;
155 extern struct evcnt uvm_ra_miss;
156
157 /*
158 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
159 * interlocked tsleep() function.
160 */
161
162 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \
163 do { \
164 (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \
165 msg, timo, slock); \
166 } while (/*CONSTCOND*/ 0)
167
168 void uvm_kick_pdaemon(void);
169
170 /*
171 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
172 */
173
174 #if defined(UVM_PAGE_TRKOWN)
175 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
176 #else
177 #define UVM_PAGE_OWN(PG, TAG) /* nothing */
178 #endif /* UVM_PAGE_TRKOWN */
179
180 #include <uvm/uvm_fault_i.h>
181
182 #endif /* _KERNEL */
183
184 #endif /* _UVM_UVM_H_ */
Cache object: a6ca3cdf8011c6bef2772cf50bc3504f
|