param.h revision 1.11 
1/*	$NetBSD: param.h,v 1.11 1996/02/22 10:11:43 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	24		/* LOG2(NBSEG) [68030 value] */
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/* pages ("clicks") to disk blocks */
117#define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
118#define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
119
120/* pages to bytes */
121#define	ctob(x)		((x) << PGSHIFT)
122#define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
123
124/* bytes to disk blocks */
125#define	btodb(x)	((x) >> DEV_BSHIFT)
126#define	dbtob(x)	((x) << DEV_BSHIFT)
127
128/*
129 * Map a ``block device block'' to a file system block.
130 * This should be device dependent, and should use the bsize
131 * field from the disk label.
132 * For now though just use DEV_BSIZE.
133 */
134#define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
135
136/*
137 * Mach derived conversion macros
138 */
139#define atari_round_seg(x)	((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
140#define atari_trunc_seg(x)	((unsigned)(x) & ~(NBSEG-1))
141#define atari_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
142#define atari_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
143#define atari_btos(x)		((unsigned)(x) >> SEGSHIFT)
144#define atari_stob(x)		((unsigned)(x) << SEGSHIFT)
145#define atari_btop(x)		((unsigned)(x) >> PGSHIFT)
146#define atari_ptob(x)		((unsigned)(x) << PGSHIFT)
147
148/*
149 * spl functions; all but spl0 are done in-line
150 */
151#include <machine/psl.h>
152
153#define _debug_spl(s) \
154({ \
155        register int _spl_r; \
156\
157        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
158                "&=d" (_spl_r) : "di" (s)); \
159	if ((_spl_r&PSL_IPL) > (s&PSL_IPL)) \
160		printf ("%s:%d:spl(%d) ==> spl(%d)!!\n",__FILE__,__LINE__, \
161		    ((PSL_IPL&_spl_r)>>8), ((PSL_IPL&s)>>8)); \
162        _spl_r; \
163})
164
165#define _spl_no_check(s) \
166({ \
167        register int _spl_r; \
168\
169        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
170                "&=d" (_spl_r) : "di" (s)); \
171        _spl_r; \
172})
173#if defined (DEBUG)
174#define _spl _debug_spl
175#else
176#define _spl _spl_no_check
177#endif
178
179/* spl0 requires checking for software interrupts */
180#define spl1()	_spl(PSL_S|PSL_IPL1)
181#define spl2()	_spl(PSL_S|PSL_IPL2)
182#define spl3()	_spl(PSL_S|PSL_IPL3)
183#define spl4()	_spl(PSL_S|PSL_IPL4)
184#define spl5()	_spl(PSL_S|PSL_IPL5)
185#define spl6()	_spl(PSL_S|PSL_IPL6)
186#define spl7()	_spl(PSL_S|PSL_IPL7)
187
188#define splnone()	spl0()
189#define splsoftclock()	spl1()
190#define splsoftnet()	spl1()
191#define splbio()	spl3()
192#define splnet()	spl3()
193/*
194 * lowered to spl4 to allow for serial input into
195 * private ringbuffer inspite of spltty
196 */
197#define spltty()	spl4()
198#define splimp()	spl4()
199#define splclock()	spl6()
200#define splstatclock()	spl6()
201#define splvm()		spl6()
202#define splhigh()	spl7()
203#define splsched()	spl7()
204
205#define splx(s)         (s & PSL_IPL ? _spl_no_check(s) : spl0())
206
207#ifdef _KERNEL
208int spl0 __P((void));
209void delay __P((int));
210
211#define	DELAY(n)	delay(n)
212#endif /* _KERNEL */
213
214#endif /* !_MACHINE_PARAM_H_ */
215