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_ */