vmparam.h revision 1.5 1 /* $NetBSD: vmparam.h,v 1.5 2001/11/23 17:39:05 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1988 The Regents of the University of California.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36 #ifndef _ARM32_VMPARAM_H_
37 #define _ARM32_VMPARAM_H_
38
39 #ifdef _KERNEL
40
41 #include <arm/arm32/vmparam.h>
42
43 #define USRTEXT VM_MIN_ADDRESS
44 #define USRSTACK VM_MAXUSER_ADDRESS
45
46 /*
47 * Note that MAXTSIZ mustn't be greater than 32M. Otherwise you'd have
48 * to change the compiler to not generate bl instructions
49 */
50 #define MAXTSIZ (16*1024*1024) /* max text size */
51 #ifndef DFLDSIZ
52 #define DFLDSIZ (128*1024*1024) /* initial data size limit */
53 #endif
54 #ifndef MAXDSIZ
55 #define MAXDSIZ (512*1024*1024) /* max data size */
56 #endif
57 #ifndef DFLSSIZ
58 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */
59 #endif
60 #ifndef MAXSSIZ
61 #define MAXSSIZ (8*1024*1024) /* max stack size */
62 #endif
63
64 /*
65 * Size of shared memory map
66 */
67 #ifndef SHMMAXPGS
68 #define SHMMAXPGS 1024
69 #endif
70
71 /*
72 * Address space constants
73 */
74
75 /*
76 * The line between user space and kernel space
77 * Mappings >= KERNEL_SPACE_START are constant across all processes
78 */
79 #define KERNEL_SPACE_START 0xa0000000
80
81 /* total number of page table entries to map 4GB * size of each entry*/
82 #define PAGE_TABLE_SPACE ((1 << (32 - PGSHIFT)) * sizeof(pt_entry_t))
83
84 /* Address where the page tables are mapped */
85 #define PAGE_TABLE_SPACE_START (KERNEL_SPACE_START - PAGE_TABLE_SPACE)
86
87 /* Various constants used by the MD code*/
88 #define KERNEL_BASE 0xa0000000
89 #define KERNEL_TEXT_BASE (KERNEL_BASE + 0x00100000)
90 #define ALT_PAGE_TBLS_BASE (KERNEL_BASE + 0x00c00000)
91 #define KERNEL_VM_BASE (KERNEL_BASE + 0x01000000)
92 /*
93 * The Kernel VM Size varies depending on the machine depending on how
94 * much space is needed (and where) for other mappings.
95 * In some cases the chosen value may not be the maximum in order that
96 * we don't waste memory with kernel pages tables as we can't currently
97 * grow the kernel page tables after booting.
98 * You only need to increase these values if you find that the number of
99 * buffers is being limited due to lack of VA space.
100 */
101 /*
102 * The range 0xf1000000 - 0xfcffffff is available for kernel VM space
103 * Core-logic registers and I/O mappings occupy 0xfd000000 - 0xffffffff
104 */
105 #define KERNEL_VM_SIZE 0x06000000
106 #define PROCESS_PAGE_TBLS_BASE PAGE_TABLE_SPACE_START
107
108 /*
109 * Override the default pager_map size, there's not enough KVA.
110 */
111 #define PAGER_MAP_SIZE (4 * 1024 * 1024)
112
113 /*
114 * Mach derived constants
115 */
116
117 #define VM_MIN_ADDRESS ((vm_offset_t)0x00001000)
118 #define VM_MAXUSER_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START - UPAGES * NBPG))
119 #define VM_MAX_ADDRESS ((vm_offset_t)(PAGE_TABLE_SPACE_START + (KERNEL_SPACE_START >> PGSHIFT) * sizeof(pt_entry_t)))
120
121 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNEL_TEXT_BASE)
122 #define VM_MAXKERN_ADDRESS ((vm_offset_t)(KERNEL_VM_BASE + KERNEL_VM_SIZE))
123 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)0xffffffff)
124
125 /*
126 * Size of User Raw I/O map
127 */
128
129 #define USRIOSIZE 300
130
131 /* XXX max. amount of KVM to be used by buffers. */
132 #ifndef VM_MAX_KERNEL_BUF
133 #define VM_MAX_KERNEL_BUF \
134 ((VM_MAXKERN_ADDRESS - KERNEL_VM_BASE) * 4 / 10)
135 #endif
136
137 /* virtual sizes (bytes) for various kernel submaps */
138
139 #define VM_PHYS_SIZE (USRIOSIZE*NBPG)
140
141 /*
142 * max number of non-contig chunks of physical RAM you can have
143 */
144
145 #define VM_PHYSSEG_MAX 32
146
147 /*
148 * when converting a physical address to a vm_page structure, we
149 * want to use a binary search on the chunks of physical memory
150 * to find our RAM
151 */
152
153 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH
154
155 /*
156 * this indicates that we can't add RAM to the VM system after the
157 * vm system is init'd.
158 */
159
160 #define VM_PHYSSEG_NOADD
161
162 /*
163 * we support 2 free lists:
164 *
165 * - DEFAULT for all systems
166 * - ISADMA for the ISA DMA range on Sharks only
167 */
168
169 #define VM_NFREELIST 2
170 #define VM_FREELIST_DEFAULT 0
171 #define VM_FREELIST_ISADMA 1
172
173 #endif /* _KERNEL */
174
175 #endif /* _ARM32_VMPARAM_H_ */
176