NFS - Fix numerous issues with NFS root mounts, primarily for vkernels
[dragonfly.git] / sys / vm / pmap.h
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1/*
2 * Copyright (c) 1991, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * This code is derived from software contributed to Berkeley by
6 * The Mach Operating System project at Carnegie-Mellon University.
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 the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: @(#)pmap.h 8.1 (Berkeley) 6/11/93
37 *
38 *
39 * Copyright (c) 1987, 1990 Carnegie-Mellon University.
40 * All rights reserved.
41 *
42 * Author: Avadis Tevanian, Jr.
43 *
44 * Permission to use, copy, modify and distribute this software and
45 * its documentation is hereby granted, provided that both the copyright
46 * notice and this permission notice appear in all copies of the
47 * software, derivative works or modified versions, and any portions
48 * thereof, and that both notices appear in supporting documentation.
49 *
50 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
51 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
52 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
53 *
54 * Carnegie Mellon requests users of this software to return to
55 *
56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
57 * School of Computer Science
58 * Carnegie Mellon University
59 * Pittsburgh PA 15213-3890
60 *
61 * any improvements or extensions that they make and grant Carnegie the
62 * rights to redistribute these changes.
63 *
64 * $FreeBSD: src/sys/vm/pmap.h,v 1.33.2.4 2002/03/06 22:44:24 silby Exp $
cfd17028 65 * $DragonFly: src/sys/vm/pmap.h,v 1.29 2008/08/25 17:01:42 dillon Exp $
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66 */
67
68/*
69 * Machine address mapping definitions -- machine-independent
70 * section. [For machine-dependent section, see "machine/pmap.h".]
71 */
72
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73#ifndef _VM_PMAP_H_
74#define _VM_PMAP_H_
984263bc 75
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76#ifndef _SYS_TYPES_H_
77#include <sys/types.h>
78#endif
984263bc 79
1bd40720 80#ifndef _MACHINE_PMAP_H_
984263bc 81#include <machine/pmap.h>
1bd40720 82#endif
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83
84#ifdef _KERNEL
85
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86#ifndef _VM_VM_H_
87#include <vm/vm.h>
88#endif
89
39005e16 90struct lwp;
984263bc 91struct proc;
7e1d4bf4 92struct thread;
03d6a592 93struct vm_page;
e3161323 94struct vmspace;
287ebb09 95struct vmspace_entry;
984263bc 96
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97/*
98 * Most of these variables represent parameters set up by low level MD kernel
99 * boot code to be used by higher level MI initialization code to identify
100 * the portions of kernel and physical memory which are free for allocation.
101 *
102 * KvaStart/KvaEnd/ - Reserved Kernel Virtual Memory address space.
103 * KvaSize This range represents the entire KVA space but
104 * might omit certain special mapping areas. It is
105 * used to determine what kernel memory userland has
106 * access to.
107 *
108 * virtual_{start,end} - KVA space available for allocation, not including
109 * KVA space reserved during MD startup. Used by
110 * the KMEM subsystem, used to initialize kernel_map.
111 *
112 * phys_avail[] - Array of {start,end} physical addresses, not
113 * including physical memory allocated by MD startup
114 * code. Used to initialize the VM subsystem.
115 */
116extern vm_offset_t KvaStart;
117extern vm_offset_t KvaEnd;
118extern vm_offset_t KvaSize;
119extern vm_offset_t virtual_start;
120extern vm_offset_t virtual_end;
121extern vm_paddr_t phys_avail[];
122
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123/*
124 * Return true if the passed address is in the kernel address space.
125 * This is mainly a check that the address is NOT in the user address space.
126 *
127 * For a vkernels all addresses are in the kernel address space.
128 */
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129static inline int
130kva_p(const void *addr)
131{
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132#ifdef _KERNEL_VIRTUAL
133 return (addr != NULL);
134#else
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135 return ((unsigned long)KvaStart <= (unsigned long)addr) &&
136 ((unsigned long)addr < (unsigned long)KvaEnd);
b9a7a2bd 137#endif
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138}
139
1388df65 140void pmap_change_wiring (pmap_t, vm_offset_t, boolean_t);
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141void pmap_clear_modify (struct vm_page *m);
142void pmap_clear_reference (struct vm_page *m);
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143void pmap_collect (void);
144void pmap_copy (pmap_t, pmap_t, vm_offset_t, vm_size_t,
03d6a592 145 vm_offset_t);
6ef943a3 146void pmap_copy_page (vm_paddr_t, vm_paddr_t);
f6bf3af1 147void pmap_copy_page_frag (vm_paddr_t, vm_paddr_t, size_t bytes);
1388df65 148void pmap_destroy (pmap_t);
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149void pmap_enter (pmap_t, vm_offset_t, struct vm_page *,
150 vm_prot_t, boolean_t);
6ef943a3 151vm_paddr_t pmap_extract (pmap_t pmap, vm_offset_t va);
1388df65 152void pmap_growkernel (vm_offset_t);
efaea464 153void pmap_init (void);
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154boolean_t pmap_is_modified (struct vm_page *m);
155boolean_t pmap_ts_referenced (struct vm_page *m);
6ef943a3 156vm_offset_t pmap_map (vm_offset_t, vm_paddr_t, vm_paddr_t, int);
1388df65 157void pmap_object_init_pt (pmap_t pmap, vm_offset_t addr,
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158 vm_prot_t prot, vm_object_t object, vm_pindex_t pindex,
159 vm_offset_t size, int pagelimit);
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160boolean_t pmap_page_exists_quick (pmap_t pmap, struct vm_page *m);
161void pmap_page_protect (struct vm_page *m, vm_prot_t prot);
cfd17028 162vm_paddr_t pmap_phys_address (vm_pindex_t);
1388df65 163void pmap_pinit (pmap_t);
e3161323 164void pmap_puninit (pmap_t);
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165void pmap_pinit0 (pmap_t);
166void pmap_pinit2 (pmap_t);
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167void pmap_protect (pmap_t, vm_offset_t, vm_offset_t, vm_prot_t);
168void pmap_qenter (vm_offset_t, struct vm_page **, int);
169void pmap_qenter2 (vm_offset_t, struct vm_page **, int,
170 cpumask_t *);
1388df65 171void pmap_qremove (vm_offset_t, int);
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172void pmap_kenter (vm_offset_t, vm_paddr_t);
173void pmap_kenter_quick (vm_offset_t, vm_paddr_t);
174void pmap_kenter_sync (vm_offset_t);
175void pmap_kenter_sync_quick (vm_offset_t);
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176void pmap_kmodify_rw(vm_offset_t va);
177void pmap_kmodify_nc(vm_offset_t va);
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178void pmap_kremove (vm_offset_t);
179void pmap_kremove_quick (vm_offset_t);
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180void pmap_reference (pmap_t);
181void pmap_release (pmap_t);
182void pmap_remove (pmap_t, vm_offset_t, vm_offset_t);
183void pmap_remove_pages (pmap_t, vm_offset_t, vm_offset_t);
6ef943a3 184void pmap_zero_page (vm_paddr_t);
8100156a 185void pmap_page_assertzero (vm_paddr_t);
6ef943a3 186void pmap_zero_page_area (vm_paddr_t, int off, int size);
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187void pmap_prefault (pmap_t, vm_offset_t, vm_map_entry_t);
188int pmap_mincore (pmap_t pmap, vm_offset_t addr);
13d13d89 189void pmap_init_proc (struct proc *);
1388df65 190void pmap_init_thread (struct thread *td);
c6880072 191void pmap_dispose_proc (struct proc *p);
e3161323 192void pmap_replacevm (struct proc *, struct vmspace *, int);
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193void pmap_setlwpvm (struct lwp *, struct vmspace *);
194
1388df65 195vm_offset_t pmap_addr_hint (vm_object_t obj, vm_offset_t addr, vm_size_t size);
6ef943a3 196void *pmap_kenter_temporary (vm_paddr_t pa, int i);
1388df65 197void pmap_init2 (void);
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198
199#endif /* _KERNEL */
200
1bd40720 201#endif /* _VM_PMAP_H_ */