param.h revision 1.8 
1/*	$NetBSD: param.h,v 1.8 1997/06/10 07:54:42 veego Exp $	*/
2
3/*
4 * Copyright (c) 1988 University of Utah.
5 * Copyright (c) 1982, 1986, 1990, 1993
6 *	The Regents of the University of California.  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 $Hdr: machparam.h 1.16 92/12/20$
41 *
42 *	@(#)param.h	8.1 (Berkeley) 6/10/93
43 */
44
45#ifndef	_MACHINE_PARAM_H_
46#define	_MACHINE_PARAM_H_
47
48/*
49 * Machine dependent constants for mvme68k, based on HP9000 series 300.
50 */
51#define	_MACHINE 	mvme68k
52#define	MACHINE		"mvme68k"
53
54#define	PGSHIFT		12		/* LOG2(NBPG) */
55#define	KERNBASE	0x00000000	/* start of kernel virtual */
56
57#define	UPAGES		3		/* pages of u-area */
58
59#include <m68k/param.h>
60
61#define	SEGSHIFT	22		/* LOG2(NBSEG) */
62#define NBSEG		(1 << SEGSHIFT)	/* bytes/segment */
63#define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
64
65/*
66 * Size of kernel malloc arena in CLBYTES-sized logical pages
67 */
68#ifndef NKMEMCLUSTERS
69# define	NKMEMCLUSTERS	(2048 * 1024 / CLBYTES)
70#endif
71
72/*
73 * Mach derived conversion macros
74 */
75#define m68k_round_page(x)	((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
76#define m68k_trunc_page(x)	((unsigned)(x) & ~PGOFSET)
77#define m68k_btop(x)		((unsigned)(x) >> PGSHIFT)
78#define m68k_ptob(x)		((unsigned)(x) << PGSHIFT)
79
80/*
81 * spl functions; all but spl0 are done in-line
82 */
83#include <machine/psl.h>
84
85#define _spl(s) \
86({ \
87        register int _spl_r; \
88\
89        __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
90                "&=d" (_spl_r) : "di" (s)); \
91        _spl_r; \
92})
93
94/* spl0 requires checking for software interrupts */
95#define spl1()  _spl(PSL_S|PSL_IPL1)
96#define spl2()  _spl(PSL_S|PSL_IPL2)
97#define spl3()  _spl(PSL_S|PSL_IPL3)
98#define spl4()  _spl(PSL_S|PSL_IPL4)
99#define spl5()  _spl(PSL_S|PSL_IPL5)
100#define spl6()  _spl(PSL_S|PSL_IPL6)
101#define spl7()  _spl(PSL_S|PSL_IPL7)
102
103#define splsoftclock()  spl1()
104#define splsoftnet()    spl1()
105#define splbio()        spl2()
106#define splnet()        spl3()
107#define spltty()        spl3()
108#define splimp()        spl3()
109#define splclock()      spl5()
110#define splstatclock()	spl5()
111#define splvm()         spl5()
112#define splhigh()       spl7()
113#define splsched()      spl7()
114
115/* watch out for side effects */
116#define splx(s)         (s & PSL_IPL ? _spl(s) : spl0())
117
118#if defined(_KERNEL) && !defined(_LOCORE)
119extern void _delay __P((unsigned));
120#define delay(us)	_delay((us)<<8)
121#define DELAY(n)	delay(n)
122#endif	/* _KERNEL && !_LOCORE */
123
124#endif	/* !_MACHINE_PARAM_H_ */
125