param.h revision 1.16 
1/*	$NetBSD: param.h,v 1.16 1997/01/03 22:54:36 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		"atari"
53#define	_MACHINE_ARCH	m68k
54#define	MACHINE_ARCH	"m68k"
55#define	MID_MACHINE	MID_M68K
56
57/*
58 * Round p (pointer or byte index) up to a correctly-aligned value
59 * for all data types (int, long, ...).   The result is u_int and
60 * must be cast to any desired pointer type.
61 */
62#define ALIGNBYTES	(sizeof(int) - 1)
63#define	ALIGN(p)	(((u_int)(p) + (sizeof(int) - 1)) &~ (sizeof(int) - 1))
64
65#define	NBPG		8192		/* bytes/page */
66#define	PGOFSET		(NBPG-1)	/* byte offset into page */
67#define	PGSHIFT		13		/* LOG2(NBPG) */
68#define	NPTEPG		(NBPG/(sizeof(u_int)))
69
70			/* bytes/segment */
71#define NBSEG		((mmutype == MMU_68040) ? 32*NBPG : 2048*NBPG)
72			/* byte offset into segment */
73#define	SEGOFSET	(NBSEG-1)
74#define	SEGSHIFT	24		/* LOG2(NBSEG) [68030 value] */
75
76#define	KERNBASE	0x0		/* start of kernel virtual */
77#define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
78
79#define	DEV_BSIZE	512
80#define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
81#define BLKDEV_IOSIZE	2048
82#define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
83
84#define	CLSIZE		1
85#define	CLSIZELOG2	0
86
87/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
88#define	SSIZE		1		/* initial stack size/NBPG */
89#define	SINCR		1		/* increment of stack/NBPG */
90
91#define	UPAGES		2		/* pages of u-area */
92#define USPACE		(UPAGES * NBPG)
93
94/*
95 * Constants related to network buffer management.
96 * MCLBYTES must be no larger than CLBYTES (the software page size), and,
97 * on machines that exchange pages of input or output buffers with mbuf
98 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
99 * of the hardware page size.
100 */
101#define	MSIZE		128		/* size of an mbuf */
102#define	MCLBYTES	1024
103#define	MCLSHIFT	10
104#define	MCLOFSET	(MCLBYTES - 1)
105#ifndef NMBCLUSTERS
106#ifdef GATEWAY
107#define	NMBCLUSTERS	512		/* map size, max cluster allocation */
108#else
109#define	NMBCLUSTERS	256		/* map size, max cluster allocation */
110#endif
111#endif
112
113/*
114 * Size of kernel malloc arena in CLBYTES-sized logical pages
115 */
116#ifndef NKMEMCLUSTERS
117#define	NKMEMCLUSTERS	(3072*1024/CLBYTES)
118#endif
119
120/* pages ("clicks") to disk blocks */
121#define	ctod(x)		((x) << (PGSHIFT - DEV_BSHIFT))
122#define	dtoc(x)		((x) >> (PGSHIFT - DEV_BSHIFT))
123
124/* pages to bytes */
125#define	ctob(x)		((x) << PGSHIFT)
126#define	btoc(x)		(((x) + PGOFSET) >> PGSHIFT)
127
128/* bytes to disk blocks */
129#define	btodb(x)	((x) >> DEV_BSHIFT)
130#define	dbtob(x)	((x) << 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 atari_round_seg(x)	((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
144#define atari_trunc_seg(x)	((unsigned)(x) & ~(NBSEG-1))
145#define atari_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
146#define atari_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
147#define atari_btos(x)		((unsigned)(x) >> SEGSHIFT)
148#define atari_stob(x)		((unsigned)(x) << SEGSHIFT)
149#define atari_btop(x)		((unsigned)(x) >> PGSHIFT)
150#define atari_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 splsoftnet()	spl1()
195#define splbio()	spl3()
196#define splnet()	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 splimp()	spl4()
203#define splclock()	spl6()
204#define splstatclock()	spl6()
205#define splvm()		spl6()
206#define splhigh()	spl7()
207#define splsched()	spl7()
208
209#define splx(s)         (s & PSL_IPL ? _spl_no_check(s) : spl0())
210
211#ifdef _KERNEL
212int spl0 __P((void));
213void delay __P((int));
214
215#define	DELAY(n)	delay(n)
216#endif /* _KERNEL */
217
218#endif /* !_MACHINE_PARAM_H_ */
219