param.h revision 1.14 
1/*
2 * Copyright (c) 1988 University of Utah.
3 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
4 * 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 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 * 3. All advertising materials mentioning features or use of this software
19 *    must display the following acknowledgement:
20 *	This product includes software developed by the University of
21 *	California, Berkeley and its contributors.
22 * 4. Neither the name of the University nor the names of its contributors
23 *    may be used to endorse or promote products derived from this software
24 *    without specific prior written permission.
25 *
26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
29 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 * SUCH DAMAGE.
37 *
38 * from: Utah $Hdr: machparam.h 1.11 89/08/14$
39 *
40 *	@(#)param.h	7.8 (Berkeley) 6/28/91
41 *	$Id: param.h,v 1.14 1994/09/16 02:39:36 jtc Exp $
42 */
43#ifndef _MACHINE_PARAM_H_
44#define _MACHINE_PARAM_H_
45
46/*
47 * Machine dependent constants for amiga
48 */
49#define	MACHINE		"amiga"
50#define MACHINE_ARCH	"m68k"
51#define MID_MACHINE	MID_M68K
52
53/*
54 * Round p (pointer or byte index) up to a correctly-aligned value
55 * for all data types (int, long, ...).   The result is u_int and
56 * must be cast to any desired pointer type.
57 */
58#define ALIGNBYTES	(sizeof(int) - 1)
59#define	ALIGN(p)	(((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1))
60
61#define	NBPG		8192		/* bytes/page */
62#define	PGOFSET		(NBPG-1)	/* byte offset into page */
63#define	PGSHIFT		13		/* LOG2(NBPG) */
64#define	NPTEPG		(NBPG/(sizeof(u_int)))
65
66#define NBSEG		(cpu040 ? 32*NBPG : 2048*NBPG)	/* bytes/segment */
67#define	SEGOFSET	(NBSEG-1)			/* byte offset into segment */
68#define	SEGSHIFT	(cpu040 ? 18 : 24)		/* LOG2(NBSEG) */
69
70#define	KERNBASE	0x0		/* 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		2		/* pages of u-area */
86#define USPACE		(UPAGES * NBPG)
87
88/*
89 * Constants related to network buffer management.
90 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
91 * on machines that exchange pages of input or output buffers with mbuf
92 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
93 * of the hardware page size.
94 */
95#define	MSIZE		128		/* size of an mbuf */
96#define	MCLBYTES	1024
97#define	MCLSHIFT	10
98#define	MCLOFSET	(MCLBYTES - 1)
99#ifndef NMBCLUSTERS
100#ifdef GATEWAY
101#define	NMBCLUSTERS	512		/* map size, max cluster allocation */
102#else
103#define	NMBCLUSTERS	256		/* map size, max cluster allocation */
104#endif
105#endif
106
107/*
108 * Size of kernel malloc arena in CLBYTES-sized logical pages
109 */
110#ifndef NKMEMCLUSTERS
111#define	NKMEMCLUSTERS	(3072*1024/CLBYTES)
112#endif
113
114#define MAXPARTITIONS	16
115
116/* pages ("clicks") to disk blocks */
117#define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
118#define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
119#define	dtob(x)	((x)<<DEV_BSHIFT)
120
121/* pages to bytes */
122#define	ctob(x)	((x)<<PGSHIFT)
123
124/* bytes to pages */
125#define	btoc(x)	(((unsigned)(x)+(NBPG-1))>>PGSHIFT)
126
127#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
128	((unsigned)(bytes) >> DEV_BSHIFT)
129#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
130	((unsigned)(db) << DEV_BSHIFT)
131
132/*
133 * Map a ``block device block'' to a file system block.
134 * This should be device dependent, and should use the bsize
135 * field from the disk label.
136 * For now though just use DEV_BSIZE.
137 */
138#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
139
140/*
141 * Mach derived conversion macros
142 */
143#define amiga_round_seg(x)	((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
144#define amiga_trunc_seg(x)	((unsigned)(x) & ~(NBSEG-1))
145#define amiga_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
146#define amiga_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
147#define amiga_btos(x)		((unsigned)(x) >> SEGSHIFT)
148#define amiga_stob(x)		((unsigned)(x) << SEGSHIFT)
149#define amiga_btop(x)		((unsigned)(x) >> PGSHIFT)
150#define amiga_ptob(x)		((unsigned)(x) << PGSHIFT)
151
152/*
153 * spl functions; all but spl0 are done in-line
154 */
155#include <machine/psl.h>
156
157#define _debug_spl(s) \
158({ \
159        register int _spl_r; \
160\
161        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
162                "&=d" (_spl_r) : "di" (s)); \
163	if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \
164		printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \
165		    ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \
166        _spl_r; \
167})
168
169#define _spl_no_check(s) \
170({ \
171        register int _spl_r; \
172\
173        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
174                "&=d" (_spl_r) : "di" (s)); \
175        _spl_r; \
176})
177#if defined (DEBUG)
178#define _spl _debug_spl
179#else
180#define _spl _spl_no_check
181#endif
182
183/* spl0 requires checking for software interrupts */
184#define spl1()	_spl(PSL_S|PSL_IPL1)
185#define spl2()	_spl(PSL_S|PSL_IPL2)
186#define spl3()	_spl(PSL_S|PSL_IPL3)
187#define spl4()	_spl(PSL_S|PSL_IPL4)
188#define spl5()	_spl(PSL_S|PSL_IPL5)
189#define spl6()	_spl(PSL_S|PSL_IPL6)
190#define spl7()	_spl(PSL_S|PSL_IPL7)
191
192#define splnone()	spl0()
193#define splsoftclock()	spl1()
194#define splnet()	spl1()
195#define splbio()	spl3()
196#define splimp()	spl3()
197/*
198 * lowered to spl4 to allow for serial input into
199 * private ringbuffer inspite of spltty
200 */
201#define spltty()	spl4()
202#define splclock()	spl6()
203#define splstatclock()	spl6()
204#define splvm()		spl6()
205#define splhigh()	spl7()
206#define splsched()	spl7()
207
208#define splx(s)         (s & PSL_IPL ? _spl_no_check(s) : spl0())
209
210#ifdef KERNEL
211int	cpuspeed;
212void delay __P((int));
213void DELAY __P((int));
214#else
215#define	DELAY(n)	{ register int N = (n); while (--N > 0); }
216#endif
217
218#endif /* !_MACHINE_PARAM_H_ */
219