param3.h revision 1.18 1 /*
2 * Copyright (c) 1994 Gordon W. Ross
3 * Copyright (c) 1993 Adam Glass
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * This code is derived from software contributed to Berkeley by
9 * the Systems Programming Group of the University of Utah Computer
10 * Science Department.
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 * 1. Redistributions of source code must retain the above copyright
16 * notice, this list of conditions and the following disclaimer.
17 * 2. Redistributions in binary form must reproduce the above copyright
18 * notice, this list of conditions and the following disclaimer in the
19 * documentation and/or other materials provided with the distribution.
20 * 3. All advertising materials mentioning features or use of this software
21 * must display the following acknowledgement:
22 * This product includes software developed by the University of
23 * California, Berkeley and its contributors.
24 * 4. Neither the name of the University nor the names of its contributors
25 * may be used to endorse or promote products derived from this software
26 * without specific prior written permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * from: Utah Hdr: machparam.h 1.16 92/12/20
41 * from: @(#)param.h 8.1 (Berkeley) 6/10/93
42 * $Id: param3.h,v 1.18 1994/09/20 16:31:03 gwr Exp $
43 */
44
45 #ifndef MACHINE
46
47 /*
48 * Machine dependent constants for the Sun3 series.
49 */
50 #define MACHINE "sun3"
51 #define MACHINE_ARCH "m68k"
52 #define MID_MACHINE MID_M68K
53
54 /*
55 * Round p (pointer or byte index) up to a correctly-aligned value
56 * for all data types (int, long, ...). The result is u_int and
57 * must be cast to any desired pointer type.
58 */
59 #define ALIGNBYTES 3
60 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
61
62 #define NBPG 8192 /* bytes/page */
63 #define PGOFSET (NBPG-1) /* byte offset into page */
64 #define PGSHIFT 13 /* LOG2(NBPG) */
65
66 #define NBSG 0x20000 /* bytes/segment */
67 #define SEGOFSET (NBSG-1) /* byte offset into segment */
68 #define SEGSHIFT 17 /* LOG2(NBSG) */
69
70 #define KERNBASE 0x0E000000 /* start of kernel virtual */
71 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
72
73 #define DEV_BSIZE 512
74 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
75 #define BLKDEV_IOSIZE 2048
76 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
77
78 #define CLSIZE 1
79 #define CLSIZELOG2 0
80
81 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
82 #define SSIZE 1 /* initial stack size/NBPG */
83 #define SINCR 1 /* increment of stack/NBPG */
84
85 #define UPAGES 3 /* pages of u-area */
86
87 /*
88 * Constants related to network buffer management.
89 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
90 * on machines that exchange pages of input or output buffers with mbuf
91 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
92 * of the hardware page size.
93 */
94 #define MSIZE 128 /* size of an mbuf */
95 #define MCLBYTES 2048 /* large enough for ether MTU */
96 #define MCLSHIFT 11
97 #define MCLOFSET (MCLBYTES - 1)
98 #ifndef NMBCLUSTERS
99 #ifdef GATEWAY
100 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
101 #else
102 #define NMBCLUSTERS 256 /* map size, max cluster allocation */
103 #endif
104 #endif
105
106 /*
107 * Size of kernel malloc arena in CLBYTES-sized logical pages
108 */
109 #ifndef NKMEMCLUSTERS
110 #define NKMEMCLUSTERS (2048*1024/CLBYTES)
111 #endif
112
113 /* pages ("clicks") (4096 bytes) to disk blocks */
114 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
115 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
116 #define dtob(x) ((x)<<DEV_BSHIFT)
117
118 /* pages to bytes */
119 #define ctob(x) ((x)<<PGSHIFT)
120
121 /* bytes to pages */
122 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
123
124 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
125 ((unsigned)(bytes) >> DEV_BSHIFT)
126 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
127 ((unsigned)(db) << DEV_BSHIFT)
128
129 /*
130 * Map a ``block device block'' to a file system block.
131 * This should be device dependent, and should use the bsize
132 * field from the disk label.
133 * For now though just use DEV_BSIZE.
134 */
135 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
136
137 /*
138 * Mach derived conversion macros
139 */
140 #define sun3_round_seg(x) ((((unsigned)(x)) + NBSG - 1) & ~(NBSG-1))
141 #define sun3_trunc_seg(x) ((unsigned)(x) & ~(NBSG-1))
142 #define sun3_round_up_seg(x) (sun3_trunc_seg(x) + NBSG)
143 #define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT)
144 #define sun3_stob(x) ((unsigned)(x) << SEGSHIFT)
145
146 #define sun3_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
147 #define sun3_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
148 #define sun3_round_up_page(x) (sun3_round_page(x) + NBPG)
149 #define sun3_btop(x) ((unsigned)(x) >> PGSHIFT)
150 #define sun3_ptob(x) ((unsigned)(x) << PGSHIFT)
151
152 /*
153 * Suns have a REAL interrupt register, so spl0() and splx(s)
154 * have no need to check for any simulated interrupts, etc.
155 * All are done in-line (if optimization turned on).
156 */
157 #include <machine/psl.h>
158
159 #ifdef __GNUC__
160 /*
161 * This is as close to a macro as one can get.
162 * (See the GCC extensions info document.)
163 */
164 extern __inline__ int _spl(int new)
165 {
166 register int old;
167 __asm__ __volatile ("clrl %0; movw sr,%0; movw %1,sr" :
168 "&=d" (old) : "di" (new));
169 return (old);
170 }
171 #endif /* GNUC */
172
173 #define spl0() _spl(PSL_S|PSL_IPL0)
174 #define spl1() _spl(PSL_S|PSL_IPL1)
175 #define spl2() _spl(PSL_S|PSL_IPL2)
176 #define spl3() _spl(PSL_S|PSL_IPL3)
177 #define spl4() _spl(PSL_S|PSL_IPL4)
178 #define spl5() _spl(PSL_S|PSL_IPL5)
179 #define spl6() _spl(PSL_S|PSL_IPL6)
180 #define spl7() _spl(PSL_S|PSL_IPL7)
181 #define splx(x) _spl(x)
182
183 #define splsoftclock() spl1()
184 #define splnet() spl3()
185 #define splbio() spl2()
186 #define splimp() spl3()
187 #define spltty() spl2()
188 #define splzs() spl6()
189 #define splclock() spl5()
190 #define splstatclock() splclock()
191 #define splvm() splimp()
192 #define splhigh() spl7()
193 #define splsched() spl7()
194
195 #ifdef KERNEL
196 #ifndef LOCORE
197 #define DELAY(n) delay(n)
198 #endif
199
200 #else
201 #define DELAY(n) { register int N = (n); while (--N > 0); }
202 #endif
203
204 #endif /* MACHINE */
205