1/* $NetBSD: param.h,v 1.24 2021/05/31 14:38:55 simonb 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. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 *
36 * from: Utah $Hdr: machparam.h 1.16 92/12/20$
37 *
38 * @(#)param.h 8.1 (Berkeley) 6/10/93
39 */
40
41#ifndef _M68K_PARAM_H_
42#define _M68K_PARAM_H_
43
44#ifdef _KERNEL_OPT
45#include "opt_param.h"
46#endif
47
48/*
49 * Machine independent constants for m68k
50 */
51#ifndef MACHINE_ARCH
52#define _MACHINE_ARCH m68k
53#define MACHINE_ARCH "m68k"
54#endif
55#ifndef MID_MACHINE
56#define MID_MACHINE MID_M68K
57#endif
58#ifndef _KERNEL
59#undef MACHINE
60#define MACHINE "m68k"
61#endif
62
63#define NBPG (1 << PGSHIFT) /* bytes/page */
64#define PGOFSET (NBPG-1) /* byte offset into page */
65
66#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
67
68#define SSIZE 1 /* initial stack size/NBPG */
69#define SINCR 1 /* increment of stack/NBPG */
70
71#define USPACE (UPAGES * NBPG)
72
73#ifndef MSGBUFSIZE
74#define MSGBUFSIZE NBPG /* default message buffer size */
75#endif
76
77/*
78 * Constants related to network buffer management.
79 * MCLBYTES must be no larger than NBPG (the software page size), and,
80 * on machines that exchange pages of input or output buffers with mbuf
81 * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
82 * of the hardware page size.
83 */
84#define MSIZE 256 /* size of an mbuf */
85
86#ifndef MCLSHIFT
87#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
88 /* 2K cluster can hold Ether frame */
89#endif /* MCLSHIFT */
90
91#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
92
93/*
94 * Mach-derived conversion macros
95 */
96#define m68k_round_page(x) ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET)
97#define m68k_trunc_page(x) ((vaddr_t)(x) & ~PGOFSET)
98#define m68k_page_offset(x) ((vaddr_t)(x) & PGOFSET)
99#define m68k_btop(x) ((vaddr_t)(x) >> PGSHIFT)
100#define m68k_ptob(x) ((vaddr_t)(x) << PGSHIFT)
101
102/* Default audio blocksize in msec. See sys/dev/audio/audio.c */
103#if defined(_KERNEL)
104#define __AUDIO_BLK_MS (40)
105#endif
106
107#endif /* !_M68K_PARAM_H_ */