param.h revision 1.5 
1/*	$NetBSD: param.h,v 1.5 1995/04/22 22:20:36 leo Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
6 * 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 $Hdr: machparam.h 1.11 89/08/14$
41 *
42 *	@(#)param.h	7.8 (Berkeley) 6/28/91
43 */
44
45#ifndef _MACHINE_PARAM_H_
46#define _MACHINE_PARAM_H_
47
48/*
49 * Machine dependent constants for atari
50 */
51#define	MACHINE		"atari"
52#define MACHINE_ARCH	"m68k"
53#define MID_MACHINE	MID_M68K
54
55/*
56 * Round p (pointer or byte index) up to a correctly-aligned value
57 * for all data types (int, long, ...).   The result is u_int and
58 * must be cast to any desired pointer type.
59 */
60#define ALIGNBYTES	(sizeof(int) - 1)
61#define	ALIGN(p)	(((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1))
62
63#define	NBPG		8192		/* bytes/page */
64#define	PGOFSET		(NBPG-1)	/* byte offset into page */
65#define	PGSHIFT		13		/* LOG2(NBPG) */
66#define	NPTEPG		(NBPG/(sizeof(u_int)))
67
68#define NBSEG		(cpu040 ? 32*NBPG : 2048*NBPG)	/* bytes/segment */
69#define	SEGOFSET	(NBSEG-1)			/* byte offset into segment */
70#define	SEGSHIFT	(cpu040 ? 18 : 24)		/* LOG2(NBSEG) */
71
72#define	KERNBASE	0x0		/* start of kernel virtual */
73#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
74
75#define	DEV_BSIZE	512
76#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
77#define BLKDEV_IOSIZE	2048
78#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
79
80#define	CLSIZE		1
81#define	CLSIZELOG2	0
82
83/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
84#define	SSIZE		1		/* initial stack size/NBPG */
85#define	SINCR		1		/* increment of stack/NBPG */
86
87#define	UPAGES		2		/* pages of u-area */
88#define USPACE		(UPAGES * NBPG)
89
90/*
91 * Constants related to network buffer management.
92 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
93 * on machines that exchange pages of input or output buffers with mbuf
94 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
95 * of the hardware page size.
96 */
97#define	MSIZE		128		/* size of an mbuf */
98#define	MCLBYTES	1024
99#define	MCLSHIFT	10
100#define	MCLOFSET	(MCLBYTES - 1)
101#ifndef NMBCLUSTERS
102#ifdef GATEWAY
103#define	NMBCLUSTERS	512		/* map size, max cluster allocation */
104#else
105#define	NMBCLUSTERS	256		/* map size, max cluster allocation */
106#endif
107#endif
108
109/*
110 * Size of kernel malloc arena in CLBYTES-sized logical pages
111 */
112#ifndef NKMEMCLUSTERS
113#define	NKMEMCLUSTERS	(3072*1024/CLBYTES)
114#endif
115
116#define MAXPARTITIONS	16
117
118/* pages ("clicks") to disk blocks */
119#define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
120#define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
121#define	dtob(x)	((x)<<DEV_BSHIFT)
122
123/* pages to bytes */
124#define	ctob(x)	((x)<<PGSHIFT)
125
126/* bytes to pages */
127#define	btoc(x)	(((unsigned)(x)+(NBPG-1))>>PGSHIFT)
128
129#define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
130	((bytes) >> DEV_BSHIFT)
131#define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
132	((db) << DEV_BSHIFT)
133
134/*
135 * Map a ``block device block'' to a file system block.
136 * This should be device dependent, and should use the bsize
137 * field from the disk label.
138 * For now though just use DEV_BSIZE.
139 */
140#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
141
142/*
143 * Mach derived conversion macros
144 */
145#define atari_round_seg(x)	((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
146#define atari_trunc_seg(x)	((unsigned)(x) & ~(NBSEG-1))
147#define atari_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
148#define atari_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
149#define atari_btos(x)		((unsigned)(x) >> SEGSHIFT)
150#define atari_stob(x)		((unsigned)(x) << SEGSHIFT)
151#define atari_btop(x)		((unsigned)(x) >> PGSHIFT)
152#define atari_ptob(x)		((unsigned)(x) << PGSHIFT)
153
154/*
155 * spl functions; all but spl0 are done in-line
156 */
157#include <machine/psl.h>
158
159#define _debug_spl(s) \
160({ \
161        register int _spl_r; \
162\
163        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
164                "&=d" (_spl_r) : "di" (s)); \
165	if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \
166		printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \
167		    ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \
168        _spl_r; \
169})
170
171#define _spl_no_check(s) \
172({ \
173        register int _spl_r; \
174\
175        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
176                "&=d" (_spl_r) : "di" (s)); \
177        _spl_r; \
178})
179#if defined (DEBUG)
180#define _spl _debug_spl
181#else
182#define _spl _spl_no_check
183#endif
184
185/* spl0 requires checking for software interrupts */
186#define spl1()	_spl(PSL_S|PSL_IPL1)
187#define spl2()	_spl(PSL_S|PSL_IPL2)
188#define spl3()	_spl(PSL_S|PSL_IPL3)
189#define spl4()	_spl(PSL_S|PSL_IPL4)
190#define spl5()	_spl(PSL_S|PSL_IPL5)
191#define spl6()	_spl(PSL_S|PSL_IPL6)
192#define spl7()	_spl(PSL_S|PSL_IPL7)
193
194#define splnone()	spl0()
195#define splsoftclock()	spl1()
196#define splnet()	spl1()
197#define splbio()	spl3()
198#define splimp()	spl3()
199/*
200 * lowered to spl4 to allow for serial input into
201 * private ringbuffer inspite of spltty
202 */
203#define spltty()	spl4()
204#define splclock()	spl6()
205#define splstatclock()	spl6()
206#define splvm()		spl6()
207#define splhigh()	spl7()
208#define splsched()	spl7()
209
210#define splx(s)         (s & PSL_IPL ? _spl_no_check(s) : spl0())
211
212#ifdef _KERNEL
213void delay __P((int));
214
215#define	DELAY(n)	delay(n)
216#else
217#define	DELAY(n)	{ register int N = (n); while (--N > 0); }
218#endif /* _KERNEL */
219
220#endif /* !_MACHINE_PARAM_H_ */
221