xref: /netbsd-src/sys/arch/amd64/include/vmparam.h (revision 8b0f9554ff8762542c4defc4f70e1eb76fb508fa)
1 /*	$NetBSD: vmparam.h,v 1.16 2007/11/22 16:16:46 bouyer Exp $	*/
2 
3 /*-
4  * Copyright (c) 1990 The Regents of the University of California.
5  * All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * William Jolitz.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  *
34  *	@(#)vmparam.h	5.9 (Berkeley) 5/12/91
35  */
36 
37 #ifndef _VMPARAM_H_
38 #define _VMPARAM_H_
39 
40 #include <sys/tree.h>
41 #ifdef _KERNEL_OPT
42 #include "opt_xen.h"
43 #endif
44 
45 /*
46  * Machine dependent constants for 386.
47  */
48 
49 /*
50  * Page size on the amd64 s not variable in the traditional sense.
51  * We override the PAGE_* definitions to compile-time constants.
52  */
53 #define	PAGE_SHIFT	12
54 #define	PAGE_SIZE	(1 << PAGE_SHIFT)
55 #define	PAGE_MASK	(PAGE_SIZE - 1)
56 
57 /*
58  * USRSTACK is the top (end) of the user stack. Immediately above the
59  * user stack resides the user structure, which is UPAGES long and contains
60  * the kernel stack.
61  *
62  * Immediately after the user structure is the page table map, and then
63  * kernel address space.
64  */
65 #define	USRSTACK	VM_MAXUSER_ADDRESS
66 
67 #define USRSTACK32	VM_MAXUSER_ADDRESS32
68 
69 /*
70  * Virtual memory related constants, all in bytes
71  */
72 #define	MAXTSIZ		(64*1024*1024)		/* max text size */
73 #ifndef DFLDSIZ
74 #define	DFLDSIZ		(256*1024*1024)		/* initial data size limit */
75 #endif
76 #ifndef MAXDSIZ
77 #define	MAXDSIZ		(8L*1024*1024*1024)	/* max data size */
78 #endif
79 #ifndef	DFLSSIZ
80 #define	DFLSSIZ		(2*1024*1024)		/* initial stack size limit */
81 #endif
82 #ifndef	MAXSSIZ
83 #define	MAXSSIZ		(32*1024*1024)		/* max stack size */
84 #endif
85 
86 /*
87  * 32bit memory related constants.
88  */
89 
90 #define MAXTSIZ32	(64*1024*1024)
91 #ifndef DFLDSIZ32
92 #define	DFLDSIZ32	(256*1024*1024)		/* initial data size limit */
93 #endif
94 #ifndef MAXDSIZ32
95 #define	MAXDSIZ32	(3U*1024*1024*1024)	/* max data size */
96 #endif
97 #ifndef	DFLSSIZ32
98 #define	DFLSSIZ32	(2*1024*1024)		/* initial stack size limit */
99 #endif
100 #ifndef	MAXSSIZ32
101 #define	MAXSSIZ32	(64*1024*1024)		/* max stack size */
102 #endif
103 
104 /*
105  * Size of shared memory map
106  */
107 #ifndef SHMMAXPGS
108 #define SHMMAXPGS	2048
109 #endif
110 
111 /*
112  * Size of User Raw I/O map
113  */
114 #define	USRIOSIZE 	300
115 
116 /*
117  * Mach derived constants
118  */
119 
120 /* user/kernel map constants */
121 #define VM_MIN_ADDRESS		0
122 #define VM_MAXUSER_ADDRESS	0x00007f8000000000
123 #define VM_MAX_ADDRESS		0x00007fbfdfeff000
124 #ifndef XEN
125 #define VM_MIN_KERNEL_ADDRESS	0xffff800000000000
126 #else /* XEN */
127 #define VM_MIN_KERNEL_ADDRESS	0xffffa00000000000
128 #endif
129 #define VM_MAX_KERNEL_ADDRESS	0xffffff8000000000
130 
131 #define VM_MAXUSER_ADDRESS32	0xfffff000
132 
133 /*
134  * The address to which unspecified mapping requests default
135  */
136 #ifdef _KERNEL_OPT
137 #include "opt_uvm.h"
138 #endif
139 #define __USE_TOPDOWN_VM
140 #define VM_DEFAULT_ADDRESS(da, sz) \
141 	trunc_page(USRSTACK - MAXSSIZ - (sz))
142 #define VM_DEFAULT_ADDRESS32(da, sz) \
143 	trunc_page(USRSTACK32 - MAXSSIZ32 - (sz))
144 
145 /*
146  * XXXfvdl we have plenty of KVM now, remove this.
147  */
148 #ifndef VM_MAX_KERNEL_BUF
149 #define VM_MAX_KERNEL_BUF	(384 * 1024 * 1024)
150 #endif
151 
152 /* virtual sizes (bytes) for various kernel submaps */
153 #define VM_PHYS_SIZE		(USRIOSIZE*PAGE_SIZE)
154 
155 #define VM_PHYSSEG_MAX		10	/* 1 "hole" + 9 free lists */
156 #define VM_PHYSSEG_STRAT	VM_PSTRAT_BIGFIRST
157 #define VM_PHYSSEG_NOADD		/* can't add RAM after vm_mem_init */
158 
159 #define	VM_NFREELIST		2
160 #define	VM_FREELIST_DEFAULT	0
161 #define	VM_FREELIST_FIRST16	1
162 
163 #define	__HAVE_VM_PAGE_MD
164 #define	VM_MDPAGE_INIT(pg)							\
165 	memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage));				\
166 	mutex_init(&(pg)->mdpage.mp_pvhead.pvh_lock, MUTEX_NODEBUG, IPL_VM);	\
167 	SPLAY_INIT(&(pg)->mdpage.mp_pvhead.pvh_root);
168 
169 struct pv_entry;
170 
171 struct pv_head {
172 	kmutex_t pvh_lock;		/* locks every pv in this tree */
173 	SPLAY_HEAD(pvtree, pv_entry) pvh_root;
174 					/* head of tree (locked by pvh_lock) */
175 };
176 
177 struct vm_page_md {
178 	struct pv_head mp_pvhead;
179 	struct vm_page *mp_link;
180 	int mp_attrs;	/* only 2 bits (PG_U and PG_M) are actually used. */
181 };
182 
183 #endif /* _VMPARAM_H_ */
184