1 /*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1982, 1986, 1990, 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * This code is derived from software contributed to Berkeley by
7 * the Systems Programming Group of the University of Utah Computer
8 * Science Department.
9 *
10 * %sccs.include.redist.c%
11 *
12 * from: Utah $Hdr: machparam.h 1.16 92/12/20$
13 *
14 * @(#)param.h 8.4 (Berkeley) 05/13/95
15 */
16
17 /*
18 * Machine dependent constants for HP9000 series 300.
19 */
20 #define MACHINE "hp300"
21 #define NCPUS 1
22
23 /*
24 * Round p (pointer or byte index) up to a correctly-aligned value for all
25 * data types (int, long, ...). The result is u_int and must be cast to
26 * any desired pointer type.
27 */
28 #define ALIGNBYTES 3
29 #define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
30
31 #define NBPG 4096 /* bytes/page */
32 #define PGOFSET (NBPG-1) /* byte offset into page */
33 #define PGSHIFT 12 /* LOG2(NBPG) */
34 #define NPTEPG (NBPG/(sizeof (struct pte)))
35
36 #define NBSEG 0x400000 /* bytes/segment */
37 #define SEGOFSET (NBSEG-1) /* byte offset into segment */
38 #define SEGSHIFT 22 /* LOG2(NBSEG) */
39
40 #define KERNBASE 0x00000000 /* start of kernel virtual */
41 #define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
42
43 #define DEV_BSIZE 512
44 #define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
45 #define BLKDEV_IOSIZE 2048
46 #define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
47
48 #define CLSIZE 1
49 #define CLSIZELOG2 0
50
51 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
52 #define SSIZE 1 /* initial stack size/NBPG */
53 #define SINCR 1 /* increment of stack/NBPG */
54
55 #define UPAGES 2 /* pages of u-area */
56
57 /*
58 * Constants related to network buffer management.
59 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
60 * on machines that exchange pages of input or output buffers with mbuf
61 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
62 * of the hardware page size.
63 */
64 #define MSIZE 128 /* size of an mbuf */
65 #define MCLBYTES 2048 /* large enough for ether MTU */
66 #define MCLSHIFT 11
67 #define MCLOFSET (MCLBYTES - 1)
68 #ifndef NMBCLUSTERS
69 #ifdef GATEWAY
70 #define NMBCLUSTERS 512 /* map size, max cluster allocation */
71 #else
72 #define NMBCLUSTERS 256 /* map size, max cluster allocation */
73 #endif
74 #endif
75
76 /*
77 * Size of kernel malloc arena in CLBYTES-sized logical pages
78 */
79 #ifndef NKMEMCLUSTERS
80 #define NKMEMCLUSTERS (2048*1024/CLBYTES)
81 #endif
82
83 /* pages ("clicks") (4096 bytes) to disk blocks */
84 #define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
85 #define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
86 #define dtob(x) ((x)<<DEV_BSHIFT)
87
88 /* pages to bytes */
89 #define ctob(x) ((x)<<PGSHIFT)
90
91 /* bytes to pages */
92 #define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
93
94 #define LABELSECTOR (1024/DEV_BSIZE)
95 #define LABELOFFSET 0
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 hp300_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
114 #define hp300_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
115 #define hp300_btop(x) ((unsigned)(x) >> PGSHIFT)
116 #define hp300_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() spl5()
146 #define splclock() spl6()
147 #define splstatclock() spl6()
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 #else
161 #define DELAY(n) { register int N = (n); while (--N > 0); }
162 #endif
163
164 #ifdef HPUXCOMPAT
165 /*
166 * Constants/macros for HPUX multiple mapping of user address space.
167 * Pages in the first 256Mb are mapped in at every 256Mb segment.
168 */
169 #define HPMMMASK 0xF0000000
170 #define ISHPMMADDR(v) \
171 ((curproc->p_md.md_flags & MDP_HPUXMMAP) && \
172 ((unsigned)(v) & HPMMMASK) && \
173 ((unsigned)(v) & HPMMMASK) != HPMMMASK)
174 #define HPMMBASEADDR(v) \
175 ((unsigned)(v) & ~HPMMMASK)
176 #endif
177
178 #ifndef _SIMPLELOCK_H_
179 #define _SIMPLELOCK_H_
180 /*
181 * A simple spin lock.
182 *
183 * This structure only sets one bit of data, but is sized based on the
184 * minimum word size that can be operated on by the hardware test-and-set
185 * instruction. It is only needed for multiprocessors, as uniprocessors
186 * will always run to completion or a sleep. It is an error to hold one
187 * of these locks while a process is sleeping.
188 */
189 struct simplelock {
190 int lock_data;
191 };
192
193 #if !defined(DEBUG) && NCPUS > 1
194 /*
195 * The simple-lock routines are the primitives out of which the lock
196 * package is built. The machine-dependent code must implement an
197 * atomic test_and_set operation that indivisibly sets the simple lock
198 * to non-zero and returns its old value. It also assumes that the
199 * setting of the lock to zero below is indivisible. Simple locks may
200 * only be used for exclusive locks.
201 */
202 static __inline void
simple_lock_init(lkp)203 simple_lock_init(lkp)
204 struct simplelock *lkp;
205 {
206
207 lkp->lock_data = 0;
208 }
209
210 static __inline void
simple_lock(lkp)211 simple_lock(lkp)
212 __volatile struct simplelock *lkp;
213 {
214
215 while (test_and_set(&lkp->lock_data))
216 continue;
217 }
218
219 static __inline int
simple_lock_try(lkp)220 simple_lock_try(lkp)
221 __volatile struct simplelock *lkp;
222 {
223
224 return (!test_and_set(&lkp->lock_data))
225 }
226
227 static __inline void
228 simple_unlock(lkp)
229 __volatile struct simplelock *lkp;
230 {
231
232 lkp->lock_data = 0;
233 }
234 #endif /* NCPUS > 1 */
235 #endif /* !_SIMPLELOCK_H_ */
236