uvm.h revision 1.23 1 /* $NetBSD: uvm.h,v 1.23 2000/06/26 14:21:16 mrg 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) && !defined(_LKM)
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 /*
68 * pull in VM_NFREELIST
69 */
70 #include <machine/vmparam.h>
71
72 /*
73 * uvm structure (vm global state: collected in one structure for ease
74 * of reference...)
75 */
76
77 struct uvm {
78 /* vm_page related parameters */
79 /* vm_page queues */
80 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
81 struct pglist page_active; /* allocated pages, in use */
82 struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */
83 struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */
84 simple_lock_data_t pageqlock; /* lock for active/inactive page q */
85 simple_lock_data_t fpageqlock; /* lock for free page q */
86 boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
87 boolean_t page_idle_zero; /* TRUE if we should try to zero
88 pages in the idle loop */
89 /* page daemon trigger */
90 int pagedaemon; /* daemon sleeps on this */
91 struct proc *pagedaemon_proc; /* daemon's pid */
92 simple_lock_data_t pagedaemon_lock;
93 /* page hash */
94 struct pglist *page_hash; /* page hash table (vp/off->page) */
95 int page_nhash; /* number of buckets */
96 int page_hashmask; /* hash mask */
97 simple_lock_data_t hashlock; /* lock on page_hash array */
98
99 /* anon stuff */
100 struct vm_anon *afree; /* anon free list */
101 simple_lock_data_t afreelock; /* lock on anon free list */
102
103 /* static kernel map entry pool */
104 vm_map_entry_t kentry_free; /* free page pool */
105 simple_lock_data_t kentry_lock;
106
107 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */
108 struct uvm_aiohead aio_done; /* done async i/o reqs */
109
110 /* pager VM area bounds */
111 vaddr_t pager_sva; /* start of pager VA area */
112 vaddr_t pager_eva; /* end of pager VA area */
113
114 /* swap-related items */
115 simple_lock_data_t swap_data_lock;
116
117 /* kernel object: to support anonymous pageable kernel memory */
118 struct uvm_object *kernel_object;
119 };
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 UVMHIST_DECL(maphist);
147 UVMHIST_DECL(pdhist);
148
149 /*
150 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
151 * interlocked tsleep() function.
152 */
153
154 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \
155 do { \
156 (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \
157 msg, timo, slock); \
158 } while (0)
159
160 /*
161 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
162 */
163
164 #if defined(UVM_PAGE_TRKOWN)
165 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
166 #else
167 #define UVM_PAGE_OWN(PG, TAG) /* nothing */
168 #endif /* UVM_PAGE_TRKOWN */
169
170 /*
171 * pull in inlines
172 */
173
174 #include <uvm/uvm_amap_i.h>
175 #include <uvm/uvm_fault_i.h>
176 #include <uvm/uvm_map_i.h>
177 #include <uvm/uvm_page_i.h>
178 #include <uvm/uvm_pager_i.h>
179
180 #endif /* _KERNEL */
181
182 #endif /* _UVM_UVM_H_ */
183