1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
|
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* HISTORY
*/
/*
* File: vm_param.h
*
* machine dependent virtual memory parameters.
* Most of the declarations are preceeded by M88K_ (or m88k_)
* which is OK because only M88K specific code will be using
* them.
*/
#ifndef _MACHINE_VM_PARAM_
#define _MACHINE_VM_PARAM_
/*
* USRTEXT is the start of the user text/data space, while USRSTACK
* is the top (end) of the user stack.
*/
#define USRTEXT 0x1000 /* Start of user text */
#define USRSTACK 0x80000000 /* Start of user stack */
/*
* Virtual memory related constants, all in bytes
*/
#ifndef MAXTSIZ
#define MAXTSIZ (8*1024*1024) /* max text size */
#endif
#ifndef DFLDSIZ
#define DFLDSIZ (16*1024*1024) /* initial data size limit */
#endif
#ifndef MAXDSIZ
#define MAXDSIZ (64*1024*1024) /* max data size */
#endif
#ifndef DFLSSIZ
#define DFLSSIZ (512*1024) /* initial stack size limit */
#endif
#ifndef MAXSSIZ
#define MAXSSIZ MAXDSIZ /* max stack size */
#endif
/*
* External IO space map size.
*/
#ifndef EIOMAPSIZE
#define EIOMAPSIZE 1024 /* in pages */
#endif
/*
* Default sizes of swap allocation chunks (see dmap.h).
* The actual values may be changed in vminit() based on MAXDSIZ.
* With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024.
* DMMIN should be at least ctod(1) so that vtod() works.
* vminit() insures this.
*/
#define DMMIN 32 /* smallest swap allocation */
#define DMMAX 4096 /* largest potential swap allocation */
#define DMTEXT 1024 /* swap allocation for text */
/*
* Size of shared memory map
*/
#ifndef SHMMAXPGS
#define SHMMAXPGS 1024
#endif
/*
* The time for a process to be blocked before being very swappable.
* This is a number of seconds which the system takes as being a non-trivial
* amount of real time. You probably shouldn't change this;
* it is used in subtle ways (fractions and multiples of it are, that is, like
* half of a ``long time'', almost a long time, etc.)
* It is related to human patience and other factors which don't really
* change over time.
*/
#define MAXSLP 20
/*
* A swapped in process is given a small amount of core without being bothered
* by the page replacement algorithm. Basically this says that if you are
* swapped in you deserve some resources. We protect the last SAFERSS
* pages against paging and will just swap you out rather than paging you.
* Note that each process has at least UPAGES+CLSIZE pages which are not
* paged anyways (this is currently 8+2=10 pages or 5k bytes), so this
* number just means a swapped in process is given around 25k bytes.
* Just for fun: current memory prices are 4600$ a megabyte on VAX (4/22/81),
* so we loan each swapped in process memory worth 100$, or just admit
* that we don't consider it worthwhile and swap it out to disk which costs
* $30/mb or about $0.75.
*/
#define SAFERSS 4 /* nominal ``small'' resident set size
protected against replacement */
#define VM_MINUSER_ADDRESS ((vm_offset_t) 0)
#define VM_MAXUSER_ADDRESS ((vm_offset_t) 0xffc00000U)
#define VM_MINKERNEL_ADDRESS ((vm_offset_t) 0)
#define VM_MAXKERNEL_ADDRESS ((vm_offset_t) 0x1fffffff)
/*
* Mach derived constants
*/
#define BYTE_SIZE 8 /* byte size in bits */
#define M88K_PGBYTES (1<<12) /* bytes per m88k page */
#define M88K_PGSHIFT 12 /* number of bits to shift for pages */
/*
* Convert bytes to pages and convert pages to bytes.
* No rounding is used.
*/
#define m88k_btop(x) (((unsigned)(x)) >> M88K_PGSHIFT)
#define m88k_ptob(x) (((unsigned)(x)) << M88K_PGSHIFT)
/*
* Round off or truncate to the nearest page. These will work
* for either addresses or counts. (i.e. 1 byte rounds to 1 page
* bytes.
*/
#define m88k_round_page(x) ((((unsigned)(x)) + M88K_PGBYTES - 1) & \
~(M88K_PGBYTES-1))
#define m88k_trunc_page(x) (((unsigned)(x)) & ~(M88K_PGBYTES-1))
#define VM_MIN_ADDRESS ((vm_offset_t) 0)
#define VM_MAX_ADDRESS ((vm_offset_t) 0xffc00000U)
#define VM_MIN_USER_ADDRESS ((vm_offset_t) 0)
#define VM_MAX_USER_ADDRESS ((vm_offset_t) 0xffc00000U)
/* on vme188, max = 0xf0000000 */
#define VM_MIN_KERNEL_ADDRESS ((vm_offset_t) 0)
#define VM_MAX_KERNEL_ADDRESS ((vm_offset_t) 0x1fffffff)
#define KERNEL_STACK_SIZE (3*4096) /* kernel stack size */
#define INTSTACK_SIZE (3*4096) /* interrupt stack size */
/* virtual sizes (bytes) for various kernel submaps */
#define VM_MBUF_SIZE (NMBCLUSTERS*MCLBYTES)
#define VM_KMEM_SIZE (NKMEMCLUSTERS*CLBYTES)
/*
* Conversion between MACHINE pages and VM pages
*/
#define trunc_m88k_to_vm(p) (atop(trunc_page(m88k_ptob(p))))
#define round_m88k_to_vm(p) (atop(round_page(m88k_ptob(p))))
#define vm_to_m88k(p) (m88k_btop(ptoa(p)))
#if 1 /*Do we really need all this stuff*/
#if 1 /*Do we really need all this stuff*/
#if 1 /*Do we really need all this stuff*/
#define M88K_SGPAGES (1<<10) /* pages per m88k segment */
#define M88K_SGPGSHIFT 10 /* number of bits to shift for segment-page */
#define M88K_ALSEGMS (1<<10) /* segments per m88k all space */
#define M88K_ALSGSHIFT 10 /* number of bits to shift for all-segment */
#define M88K_SGBYTES (1<<22) /* bytes per m88k segments */
#define M88K_SGSHIFT 22 /* number of bits to shift for segment */
#define M88K_ALPAGES (1<<20) /* pages per m88k all space */
#define M88K_ALPGSHIFT 20 /* number of bits to shift for all-page */
/*
* Convert bytes to pages and convert pages to bytes.
* No rounding is used.
*/
#define m88k_btopr(x) (((unsigned)(x) + (M88K_PGBYTES - 1)) >> M88K_PGSHIFT)
#define m88k_btosr(x) (((unsigned)(x) + (M88K_SGBYTES - 1)) >> M88K_SGSHIFT)
#define m88k_btos(x) (((unsigned)(x)) >> M88K_SGSHIFT)
#define m88k_stob(x) (((unsigned)(x)) << M88K_SGSHIFT)
#define m88k_ptosr(x) (((unsigned)(x) + (M88K_SGPAGES - 1)) >> M88K_SGPGSHIFT)
#define m88k_ptos(x) (((unsigned)(x)) >> M88K_SGPGSHIFT)
#define m88k_stop(x) (((unsigned)(x)) << M88K_SGPGSHIFT)
/*
* Round off or truncate to the nearest page. These will work
* for either addresses or counts. (i.e. 1 byte rounds to 1 page
* bytes.
*/
#define m88k_round_segm(x) ((((unsigned)(x)) + M88K_SGBYTES - 1) & \
~(M88K_SGBYTES-1))
#define m88k_next_segm(x) ((((unsigned)(x)) & ~(M88K_SGBYTES-1)) + \
M88K_SGBYTES)
#define m88k_trunc_segm(x) (((unsigned)(x)) & ~(M88K_SGBYTES-1))
#define m88k_round_seg(x) ((((unsigned)(x)) + M88K_SGBYTES - 1) & \
~(M88K_SGBYTES-1))
#define m88k_trunc_seg(x) (((unsigned)(x)) & ~(M88K_SGBYTES-1))
#define VEQR_ADDR 0x20000000 /* kernel virtual eq phy mapping */
#endif /* Do we really need all this stuff */
#endif /* Do we really need all this stuf */
#endif /* Do we really need all this stuff */
#endif _MACHINE_VM_PARAM_
|
