1 /*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1992 OMRON Corporation.
4 * Copyright (c) 1982, 1986, 1990, 1992, 1993
5 * The Regents of the University of California. All rights reserved.
6 *
7 * This code is derived from software contributed to Berkeley by
8 * the Systems Programming Group of the University of Utah Computer
9 * Science Department.
10 *
11 * %sccs.include.redist.c%
12 *
13 * from: Utah $Hdr: machparam.h 1.11 89/08/14$
14 * from: hp300/include/param.h 7.13 (Berkeley) 12/27/92
15 *
16 * @(#)param.h 8.3 (Berkeley) 05/14/95
17 */
18
19 /*
20 * Machine dependent constants for LUNA taken from:
21 * Param.h for HP9000 series 300.
22 */
23 #define MACHINE "luna68k"
24 #define NCPUS 1
25
26 /*
27 * Round p (pointer or byte index) up to a correctly-aligned value
28 * for all data types (int, long, ...). The result is u_int and
29 * must be cast to any desired pointer type.
30 */
31 #define ALIGNBYTES 3
32 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
33
34 #define NBPG 4096 /* bytes/page */
35 #define PGOFSET (NBPG-1) /* byte offset into page */
36 #define PGSHIFT 12 /* LOG2(NBPG) */
37 #define NPTEPG (NBPG/(sizeof (struct pte)))
38
39 #define NBSEG 0x400000 /* bytes/segment */
40 #define SEGOFSET (NBSEG-1) /* byte offset into segment */
41 #define SEGSHIFT 22 /* LOG2(NBSEG) */
42
43 #define KERNBASE 0x00000000 /* start of kernel virtual */
44 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
45
46 #define DEV_BSIZE 512
47 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
48 #define BLKDEV_IOSIZE 2048
49 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
50
51 #define CLSIZE 1
52 #define CLSIZELOG2 0
53
54 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
55 #define SSIZE 1 /* initial stack size/NBPG */
56 #define SINCR 1 /* increment of stack/NBPG */
57
58 #define UPAGES 2 /* pages of u-area */
59
60 /*
61 * Constants related to network buffer management.
62 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
63 * on machines that exchange pages of input or output buffers with mbuf
64 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
65 * of the hardware page size.
66 */
67 #define MSIZE 128 /* size of an mbuf */
68 #define MCLBYTES 2048 /* large enough for ether MTU */
69 #define MCLSHIFT 11
70 #define MCLOFSET (MCLBYTES - 1)
71 #ifndef NMBCLUSTERS
72 #ifdef GATEWAY
73 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
74 #else
75 #define NMBCLUSTERS 256 /* map size, max cluster allocation */
76 #endif
77 #endif
78
79 /*
80 * Size of kernel malloc arena in CLBYTES-sized logical pages
81 */
82 #ifndef NKMEMCLUSTERS
83 #define NKMEMCLUSTERS (2048*1024/CLBYTES)
84 #endif
85
86 /* pages ("clicks") (4096 bytes) to disk blocks */
87 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
88 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
89 #define dtob(x) ((x)<<DEV_BSHIFT)
90
91 /* pages to bytes */
92 #define ctob(x) ((x)<<PGSHIFT)
93
94 /* bytes to pages */
95 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
96
97 #define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
98 ((bytes) >> DEV_BSHIFT)
99 #define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
100 ((db) << DEV_BSHIFT)
101
102 /*
103 * Map a ``block device block'' to a file system block.
104 * This should be device dependent, and should use the bsize
105 * field from the disk label.
106 * For now though just use DEV_BSIZE.
107 */
108 #define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
109
110 /*
111 * Mach derived conversion macros
112 */
113 #define luna_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
114 #define luna_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
115 #define luna_btop(x) ((unsigned)(x) >> PGSHIFT)
116 #define luna_ptob(x) ((unsigned)(x) << PGSHIFT)
117
118 /*
119 * spl functions; all but spl0 are done in-line
120 */
121 #include <machine/psl.h>
122
123 #define _spl(s) \
124 ({ \
125 register int _spl_r; \
126 \
127 asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
128 "&=d" (_spl_r) : "di" (s)); \
129 _spl_r; \
130 })
131
132 /* spl0 requires checking for software interrupts */
133 #define spl1() _spl(PSL_S|PSL_IPL1)
134 #define spl2() _spl(PSL_S|PSL_IPL2)
135 #define spl3() _spl(PSL_S|PSL_IPL3)
136 #define spl4() _spl(PSL_S|PSL_IPL4)
137 #define spl5() _spl(PSL_S|PSL_IPL5)
138 #define spl6() _spl(PSL_S|PSL_IPL6)
139 #define spl7() _spl(PSL_S|PSL_IPL7)
140
141 #define splsoftclock() spl1()
142 #define splnet() spl1()
143 #define splbio() spl5()
144 #define splimp() spl5()
145 #define spltty() spl6()
146 #define splclock() spl5()
147 #define splstatclock() spl5()
148 #define splvm() spl6()
149 #define splhigh() spl7()
150 #define splsched() spl7()
151
152 /* watch out for side effects */
153 #define splx(s) (s & PSL_IPL ? _spl(s) : spl0())
154
155 #ifdef KERNEL
156 #ifndef LOCORE
157 int cpuspeed;
158 #define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); }
159 #endif
160
161 #else
162 #define DELAY(n) { register int N = (n); while (--N > 0); }
163 #endif
164
165 #ifndef _SIMPLELOCK_H_
166 #define _SIMPLELOCK_H_
167 /*
168 * A simple spin lock.
169 *
170 * This structure only sets one bit of data, but is sized based on the
171 * minimum word size that can be operated on by the hardware test-and-set
172 * instruction. It is only needed for multiprocessors, as uniprocessors
173 * will always run to completion or a sleep. It is an error to hold one
174 * of these locks while a process is sleeping.
175 */
176 struct simplelock {
177 int lock_data;
178 };
179
180 #if !defined(DEBUG) && NCPUS > 1
181 /*
182 * The simple-lock routines are the primitives out of which the lock
183 * package is built. The machine-dependent code must implement an
184 * atomic test_and_set operation that indivisibly sets the simple lock
185 * to non-zero and returns its old value. It also assumes that the
186 * setting of the lock to zero below is indivisible. Simple locks may
187 * only be used for exclusive locks.
188 */
189 static __inline void
simple_lock_init(lkp)190 simple_lock_init(lkp)
191 struct simplelock *lkp;
192 {
193
194 lkp->lock_data = 0;
195 }
196
197 static __inline void
simple_lock(lkp)198 simple_lock(lkp)
199 __volatile struct simplelock *lkp;
200 {
201
202 while (test_and_set(&lkp->lock_data))
203 continue;
204 }
205
206 static __inline int
simple_lock_try(lkp)207 simple_lock_try(lkp)
208 __volatile struct simplelock *lkp;
209 {
210
211 return (!test_and_set(&lkp->lock_data))
212 }
213
214 static __inline void
215 simple_unlock(lkp)
216 __volatile struct simplelock *lkp;
217 {
218
219 lkp->lock_data = 0;
220 }
221 #endif /* NCPUS > 1 */
222 #endif /* !_SIMPLELOCK_H_ */
223