param.h revision 1.34 1 /* $NetBSD: param.h,v 1.34 1998/04/29 23:11:01 thorpej Exp $ */
2
3 /*
4 * Copyright (c) 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This software was developed by the Computer Systems Engineering group
8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
9 * contributed to Berkeley.
10 *
11 * All advertising materials mentioning features or use of this software
12 * must display the following acknowledgement:
13 * This product includes software developed by the University of
14 * California, Lawrence Berkeley Laboratory.
15 *
16 * Redistribution and use in source and binary forms, with or without
17 * modification, are permitted provided that the following conditions
18 * are met:
19 * 1. Redistributions of source code must retain the above copyright
20 * notice, this list of conditions and the following disclaimer.
21 * 2. Redistributions in binary form must reproduce the above copyright
22 * notice, this list of conditions and the following disclaimer in the
23 * documentation and/or other materials provided with the distribution.
24 * 3. All advertising materials mentioning features or use of this software
25 * must display the following acknowledgement:
26 * This product includes software developed by the University of
27 * California, Berkeley and its contributors.
28 * 4. Neither the name of the University nor the names of its contributors
29 * may be used to endorse or promote products derived from this software
30 * without specific prior written permission.
31 *
32 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
34 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
35 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
36 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
37 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
38 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
39 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
40 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
41 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
42 * SUCH DAMAGE.
43 *
44 * @(#)param.h 8.1 (Berkeley) 6/11/93
45 */
46 /*
47 * Sun4M support by Aaron Brown, Harvard University.
48 * Changes Copyright (c) 1995 The President and Fellows of Harvard College.
49 * All rights reserved.
50 */
51 #define _MACHINE sparc
52 #define MACHINE "sparc"
53 #define _MACHINE_ARCH sparc
54 #define MACHINE_ARCH "sparc"
55 #define MID_MACHINE MID_SPARC
56
57 #ifdef _KERNEL /* XXX */
58 #ifndef _LOCORE /* XXX */
59 #include <machine/cpu.h> /* XXX */
60 #endif /* XXX */
61 #endif /* XXX */
62
63 /*
64 * Round p (pointer or byte index) up to a correctly-aligned value for
65 * the machine's strictest data type. The result is u_int and must be
66 * cast to any desired pointer type.
67 *
68 * ALIGNED_POINTER is a boolean macro that checks whether an address
69 * is valid to fetch data elements of type t from on this architecture.
70 * This does not reflect the optimal alignment, just the possibility
71 * (within reasonable limits).
72 *
73 */
74 #define ALIGNBYTES 7
75 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
76 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
77
78 #define SUN4_PGSHIFT 13 /* for a sun4 machine */
79 #define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */
80
81 /*
82 * The following variables are always defined and initialized (in locore)
83 * so independently compiled modules (e.g. LKMs) can be used irrespective
84 * of the `options SUN4?' combination a particular kernel was configured with.
85 * See also the definitions of NBPG, PGOFSET and PGSHIFT below.
86 */
87 #if defined(_KERNEL) && !defined(_LOCORE)
88 extern int nbpg, pgofset, pgshift;
89 #endif
90
91 #define KERNBASE 0xf0000000 /* start of kernel virtual space */
92 #define KERNTEXTOFF (KERNBASE+0x4000) /* start of kernel text */
93
94 #define DEV_BSIZE 512
95 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
96 #define BLKDEV_IOSIZE 2048
97 #define MAXPHYS (64 * 1024)
98
99 #define CLSIZE 1
100 #define CLSIZELOG2 0
101
102 /* NOTE: SSIZE must be multiple of CLSIZE */
103 #define SSIZE 1 /* initial stack size in pages */
104 #define USPACE 8192
105
106 /*
107 * Constants related to network buffer management.
108 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
109 * on machines that exchange pages of input or output buffers with mbuf
110 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
111 * of the hardware page size.
112 */
113 #define MSIZE 128 /* size of an mbuf */
114 #define MCLBYTES 2048 /* enough for whole Ethernet packet */
115 #define MCLSHIFT 11 /* log2(MCLBYTES) */
116 #define MCLOFSET (MCLBYTES - 1)
117
118 #ifndef NMBCLUSTERS
119
120 #if defined(_KERNEL) && !defined(_LKM)
121 #include "opt_gateway.h"
122 #endif /* _KERNEL && ! _LKM */
123
124 #ifdef GATEWAY
125 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
126 #else
127 #define NMBCLUSTERS 256 /* map size, max cluster allocation */
128 #endif
129 #endif
130
131 #define MSGBUFSIZE 4096
132
133 /*
134 * Size of kernel malloc arena in CLBYTES-sized logical pages.
135 */
136 #ifndef NKMEMCLUSTERS
137 #define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES)
138 #endif
139
140 /* pages ("clicks") to disk blocks */
141 #define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
142 #define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
143
144 /* pages to bytes */
145 #define ctob(x) ((x) << PGSHIFT)
146 #define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
147
148 /* bytes to disk blocks */
149 #define btodb(x) ((x) >> DEV_BSHIFT)
150 #define dbtob(x) ((x) << DEV_BSHIFT)
151
152 /*
153 * Map a ``block device block'' to a file system block.
154 * This should be device dependent, and should use the bsize
155 * field from the disk label.
156 * For now though just use DEV_BSIZE.
157 */
158 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
159
160 /*
161 * dvmamap manages a range of DVMA addresses intended to create double
162 * mappings of physical memory. In a way, `dvmamap' is a submap of the
163 * VM map `phys_map'. The difference is the use of the `resource map'
164 * routines to manage page allocation, allowing DVMA addresses to be
165 * allocated and freed from within interrupt routines.
166 *
167 * Note that `phys_map' can still be used to allocate memory-backed pages
168 * in DVMA space.
169 */
170 #ifdef _KERNEL
171 #ifndef _LOCORE
172 extern vm_offset_t dvma_base;
173 extern vm_offset_t dvma_end;
174 extern struct map *dvmamap;
175 /*
176 * The dvma resource map is defined in page units, which are numbered 1 to N.
177 * Use these macros to convert to/from virtual addresses.
178 */
179 #define rctov(n) (ctob(((n)-1))+dvma_base)
180 #define vtorc(v) ((btoc((v)-dvma_base))+1)
181
182 extern caddr_t kdvma_mapin __P((caddr_t, int, int));
183 extern caddr_t dvma_malloc __P((size_t, void *, int));
184 extern void dvma_free __P((caddr_t, size_t, void *));
185
186 extern void delay __P((unsigned int));
187 #define DELAY(n) delay(n)
188
189 extern int cputyp;
190 #if 0
191 extern int cpumod;
192 extern int mmumod;
193 #endif
194
195 #endif /* _LOCORE */
196 #endif /* _KERNEL */
197
198 /*
199 * Values for the cputyp variable.
200 */
201 #define CPU_SUN4 0
202 #define CPU_SUN4C 1
203 #define CPU_SUN4M 2
204
205 /*
206 * Shorthand CPU-type macros. Enumerate all eight cases.
207 * Let compiler optimize away code conditional on constants.
208 *
209 * On a sun4 machine, the page size is 8192, while on a sun4c and sun4m
210 * it is 4096. Therefore, in the (SUN4 && (SUN4C || SUN4M)) cases below,
211 * NBPG, PGOFSET and PGSHIFT are defined as variables which are initialized
212 * early in locore.s after the machine type has been detected.
213 *
214 * Note that whenever the macros defined below evaluate to expressions
215 * involving variables, the kernel will perform slighly worse due to the
216 * extra memory references they'll generate.
217 */
218 #if defined(SUN4M) && defined(SUN4C) && defined(SUN4)
219 # define CPU_ISSUN4M (cputyp == CPU_SUN4M)
220 # define CPU_ISSUN4C (cputyp == CPU_SUN4C)
221 # define CPU_ISSUN4 (cputyp == CPU_SUN4)
222 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C)
223 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M)
224 # define NBPG nbpg
225 # define PGOFSET pgofset
226 # define PGSHIFT pgshift
227 #elif defined(SUN4M) && defined(SUN4C) && !defined(SUN4)
228 # define CPU_ISSUN4M (cputyp == CPU_SUN4M)
229 # define CPU_ISSUN4C (cputyp == CPU_SUN4C)
230 # define CPU_ISSUN4 (0)
231 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4C)
232 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M)
233 # define NBPG 4096
234 # define PGOFSET (NBPG-1)
235 # define PGSHIFT SUN4CM_PGSHIFT
236 #elif defined(SUN4M) && !defined(SUN4C) && defined(SUN4)
237 # define CPU_ISSUN4M (cputyp == CPU_SUN4M)
238 # define CPU_ISSUN4C (0)
239 # define CPU_ISSUN4 (cputyp == CPU_SUN4)
240 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4)
241 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4M)
242 # define NBPG nbpg
243 # define PGOFSET pgofset
244 # define PGSHIFT pgshift
245 #elif defined(SUN4M) && !defined(SUN4C) && !defined(SUN4)
246 # define CPU_ISSUN4M (1)
247 # define CPU_ISSUN4C (0)
248 # define CPU_ISSUN4 (0)
249 # define CPU_ISSUN4OR4C (0)
250 # define CPU_ISSUN4COR4M (1)
251 # define NBPG 4096
252 # define PGOFSET (NBPG-1)
253 # define PGSHIFT SUN4CM_PGSHIFT
254 #elif !defined(SUN4M) && defined(SUN4C) && defined(SUN4)
255 # define CPU_ISSUN4M (0)
256 # define CPU_ISSUN4C (cputyp == CPU_SUN4C)
257 # define CPU_ISSUN4 (cputyp == CPU_SUN4)
258 # define CPU_ISSUN4OR4C (1)
259 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C)
260 # define NBPG nbpg
261 # define PGOFSET pgofset
262 # define PGSHIFT pgshift
263 #elif !defined(SUN4M) && defined(SUN4C) && !defined(SUN4)
264 # define CPU_ISSUN4M (0)
265 # define CPU_ISSUN4C (1)
266 # define CPU_ISSUN4 (0)
267 # define CPU_ISSUN4OR4C (1)
268 # define CPU_ISSUN4COR4M (1)
269 # define NBPG 4096
270 # define PGOFSET (NBPG-1)
271 # define PGSHIFT SUN4CM_PGSHIFT
272 #elif !defined(SUN4M) && !defined(SUN4C) && defined(SUN4)
273 # define CPU_ISSUN4M (0)
274 # define CPU_ISSUN4C (0)
275 # define CPU_ISSUN4 (1)
276 # define CPU_ISSUN4OR4C (1)
277 # define CPU_ISSUN4COR4M (0)
278 # define NBPG 8192
279 # define PGOFSET (NBPG-1)
280 # define PGSHIFT SUN4_PGSHIFT
281 #elif !defined(SUN4M) && !defined(SUN4C) && !defined(SUN4)
282 # define CPU_ISSUN4M (cputyp == CPU_SUN4M)
283 # define CPU_ISSUN4C (cputyp == CPU_SUN4C)
284 # define CPU_ISSUN4 (cputyp == CPU_SUN4)
285 # define CPU_ISSUN4OR4C (cputyp == CPU_SUN4 || cputyp == CPU_SUN4C)
286 # define CPU_ISSUN4COR4M (cputyp == CPU_SUN4C || cputyp == CPU_SUN4M)
287 # define NBPG nbpg
288 # define PGOFSET pgofset
289 # define PGSHIFT pgshift
290 #endif
291