Annotation of sys/uvm/uvm.h, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: uvm.h,v 1.21 2007/06/18 21:51:15 pedro Exp $ */
2: /* $NetBSD: uvm.h,v 1.24 2000/11/27 08:40:02 chs Exp $ */
3:
4: /*
5: *
6: * Copyright (c) 1997 Charles D. Cranor and Washington University.
7: * All rights reserved.
8: *
9: * Redistribution and use in source and binary forms, with or without
10: * modification, are permitted provided that the following conditions
11: * are met:
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: * 2. Redistributions in binary form must reproduce the above copyright
15: * notice, this list of conditions and the following disclaimer in the
16: * documentation and/or other materials provided with the distribution.
17: * 3. All advertising materials mentioning features or use of this software
18: * must display the following acknowledgement:
19: * This product includes software developed by Charles D. Cranor and
20: * Washington University.
21: * 4. The name of the author may not be used to endorse or promote products
22: * derived from this software without specific prior written permission.
23: *
24: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
25: * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
26: * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
27: * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
28: * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
29: * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
30: * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31: * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
32: * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
33: * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
34: *
35: * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp
36: */
37:
38: #ifndef _UVM_UVM_H_
39: #define _UVM_UVM_H_
40:
41: #include <uvm/uvm_extern.h>
42:
43: #include <uvm/uvm_stat.h>
44:
45: /*
46: * pull in prototypes
47: */
48:
49: #include <uvm/uvm_amap.h>
50: #include <uvm/uvm_aobj.h>
51: #include <uvm/uvm_fault.h>
52: #include <uvm/uvm_glue.h>
53: #include <uvm/uvm_km.h>
54: #include <uvm/uvm_loan.h>
55: #include <uvm/uvm_map.h>
56: #include <uvm/uvm_object.h>
57: #include <uvm/uvm_page.h>
58: #include <uvm/uvm_pager.h>
59: #include <uvm/uvm_pdaemon.h>
60: #include <uvm/uvm_swap.h>
61: #ifdef UVM_SWAP_ENCRYPT
62: #include <uvm/uvm_swap_encrypt.h>
63: #endif
64:
65: /*
66: * pull in VM_NFREELIST
67: */
68: #include <machine/vmparam.h>
69:
70: /*
71: * uvm structure (vm global state: collected in one structure for ease
72: * of reference...)
73: */
74:
75: struct uvm {
76: /* vm_page related parameters */
77:
78: /* vm_page queues */
79: struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */
80: struct pglist page_active; /* allocated pages, in use */
81: struct pglist page_inactive_swp;/* pages inactive (reclaim or free) */
82: struct pglist page_inactive_obj;/* pages inactive (reclaim or free) */
83: simple_lock_data_t pageqlock; /* lock for active/inactive page q */
84: simple_lock_data_t fpageqlock; /* lock for free page q */
85: boolean_t page_init_done; /* TRUE if uvm_page_init() finished */
86: boolean_t page_idle_zero; /* TRUE if we should try to zero
87: pages in the idle loop */
88:
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:
94: /* aiodone daemon trigger */
95: int aiodoned; /* daemon sleeps on this */
96: struct proc *aiodoned_proc; /* daemon's pid */
97: simple_lock_data_t aiodoned_lock;
98:
99: /* page hash */
100: struct pglist *page_hash; /* page hash table (vp/off->page) */
101: int page_nhash; /* number of buckets */
102: int page_hashmask; /* hash mask */
103: simple_lock_data_t hashlock; /* lock on page_hash array */
104:
105: /* static kernel map entry pool */
106: vm_map_entry_t kentry_free; /* free page pool */
107: simple_lock_data_t 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: /* pager VM area bounds */
113: vaddr_t pager_sva; /* start of pager VA area */
114: vaddr_t pager_eva; /* end of pager VA area */
115:
116: /* swap-related items */
117: simple_lock_data_t swap_data_lock;
118:
119: /* kernel object: to support anonymous pageable kernel memory */
120: struct uvm_object *kernel_object;
121: };
122:
123: /*
124: * vm_map_entry etype bits:
125: */
126:
127: #define UVM_ET_OBJ 0x01 /* it is a uvm_object */
128: #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */
129: #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */
130: #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */
131:
132: #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0)
133: #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0)
134: #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0)
135: #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0)
136:
137: #ifdef _KERNEL
138:
139: /*
140: * holds all the internal UVM data
141: */
142: extern struct uvm uvm;
143:
144: /*
145: * historys
146: */
147: #ifdef UVMHIST
148: extern UVMHIST_DECL(maphist);
149: extern UVMHIST_DECL(pdhist);
150: extern UVMHIST_DECL(pghist);
151: #endif
152:
153: /*
154: * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the
155: * interlocked tsleep() function.
156: */
157:
158: #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \
159: do { \
160: (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \
161: msg, timo, slock); \
162: } while (0)
163:
164: /*
165: * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN)
166: */
167:
168: #if defined(UVM_PAGE_TRKOWN)
169: #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG)
170: #else
171: #define UVM_PAGE_OWN(PG, TAG) /* nothing */
172: #endif /* UVM_PAGE_TRKOWN */
173:
174: /*
175: * pull in inlines
176: */
177:
178: #include <uvm/uvm_amap_i.h>
179: #include <uvm/uvm_fault_i.h>
180: #include <uvm/uvm_map_i.h>
181: #include <uvm/uvm_page_i.h>
182: #include <uvm/uvm_pager_i.h>
183:
184: #endif /* _KERNEL */
185:
186: #endif /* _UVM_UVM_H_ */
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