FreeBSD/Linux Kernel Cross Reference
sys/uvm/uvm.h
1 /* $NetBSD: uvm.h,v 1.55 2008/06/04 15:06:04 ad 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 struct workqueue;
75
76 /*
77 * per-cpu data
78 */
79
80 struct uvm_cpu {
81 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
82 int page_free_nextcolor; /* next color to allocate from */
83 int page_idlezero_next; /* which color to zero next */
84 bool page_idle_zero; /* TRUE if we should try to zero
85 pages in the idle loop */
86 int pages[PGFL_NQUEUES]; /* total of pages in page_free */
87 };
88
89 /*
90 * uvm structure (vm global state: collected in one structure for ease
91 * of reference...)
92 */
93
94 struct uvm {
95 /* vm_page related parameters */
96
97 /* vm_page queues */
98 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
99 bool page_init_done; /* TRUE if uvm_page_init() finished */
100
101 /* page daemon trigger */
102 int pagedaemon; /* daemon sleeps on this */
103 struct lwp *pagedaemon_lwp; /* daemon's lid */
104
105 /* aiodone daemon */
106 struct workqueue *aiodone_queue;
107
108 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */
109 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */
110
111 /* swap-related items */
112 bool swap_running;
113 kcondvar_t scheduler_cv;
114 bool scheduler_kicked;
115 int swapout_enabled;
116
117 /* per-cpu data */
118 struct uvm_cpu cpus[MAXCPUS];
119 };
120
121 /*
122 * kernel object: to support anonymous pageable kernel memory
123 */
124 extern struct uvm_object *uvm_kernel_object;
125
126 /*
127 * locks (made globals for lockstat).
128 */
129
130 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */
131 extern kmutex_t uvm_fpageqlock; /* lock for free page q */
132 extern kmutex_t uvm_kentry_lock;
133 extern kmutex_t uvm_swap_data_lock;
134 extern kmutex_t uvm_scheduler_mutex;
135
136 #endif /* _KERNEL */
137
138 /*
139 * vm_map_entry etype bits:
140 */
141
142 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */
143 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */
144 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */
145 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */
146
147 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
148 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
149 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
150 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
151
152 #ifdef _KERNEL
153
154 /*
155 * holds all the internal UVM data
156 */
157 extern struct uvm uvm;
158
159 /*
160 * historys
161 */
162
163 #ifdef UVMHIST
164 UVMHIST_DECL(maphist);
165 UVMHIST_DECL(pdhist);
166 UVMHIST_DECL(ubchist);
167 UVMHIST_DECL(loanhist);
168 #endif
169
170 extern struct evcnt uvm_ra_total;
171 extern struct evcnt uvm_ra_hit;
172 extern struct evcnt uvm_ra_miss;
173
174 /*
175 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
176 * interlocked tsleep() function.
177 */
178
179 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \
180 do { \
181 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \
182 msg, timo, slock); \
183 } while (/*CONSTCOND*/ 0)
184
185 void uvm_kick_pdaemon(void);
186
187 /*
188 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
189 */
190
191 #if defined(UVM_PAGE_TRKOWN)
192 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
193 #else
194 #define UVM_PAGE_OWN(PG, TAG) /* nothing */
195 #endif /* UVM_PAGE_TRKOWN */
196
197 #include <uvm/uvm_fault_i.h>
198
199 #endif /* _KERNEL */
200
201 #endif /* _UVM_UVM_H_ */
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