/*      $NetBSD: param.h,v 1.24 2021/05/31 14:38:55 simonb Exp $        */

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Utah $Hdr: machparam.h 1.16 92/12/20$
*
*      @(#)param.h     8.1 (Berkeley) 6/10/93
*/

#ifndef _M68K_PARAM_H_
#define _M68K_PARAM_H_

#ifdef _KERNEL_OPT
#include "opt_param.h"
#endif

/*
* Machine independent constants for m68k
*/
#ifndef MACHINE_ARCH
#define _MACHINE_ARCH   m68k
#define MACHINE_ARCH    "m68k"
#endif
#ifndef MID_MACHINE
#define MID_MACHINE     MID_M68K
#endif
#ifndef _KERNEL
#undef MACHINE
#define MACHINE "m68k"
#endif

#define NBPG            (1 << PGSHIFT)  /* bytes/page */
#define PGOFSET         (NBPG-1)        /* byte offset into page */

#define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)

#define SSIZE           1               /* initial stack size/NBPG */
#define SINCR           1               /* increment of stack/NBPG */

#define USPACE          (UPAGES * NBPG)

#ifndef MSGBUFSIZE
#define MSGBUFSIZE      NBPG            /* default message buffer size */
#endif

/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than NBPG (the software page size), and,
* on machines that exchange pages of input or output buffers with mbuf
* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
* of the hardware page size.
*/
#define MSIZE           256             /* size of an mbuf */

#ifndef MCLSHIFT
#define MCLSHIFT        11              /* convert bytes to m_buf clusters */
                                       /* 2K cluster can hold Ether frame */
#endif  /* MCLSHIFT */

#define MCLBYTES        (1 << MCLSHIFT) /* size of a m_buf cluster */

/*
* Mach-derived conversion macros
*/
#define m68k_round_page(x)      ((((vaddr_t)(x)) + PGOFSET) & ~PGOFSET)
#define m68k_trunc_page(x)      ((vaddr_t)(x) & ~PGOFSET)
#define m68k_page_offset(x)     ((vaddr_t)(x) & PGOFSET)
#define m68k_btop(x)            ((vaddr_t)(x) >> PGSHIFT)
#define m68k_ptob(x)            ((vaddr_t)(x) << PGSHIFT)

/* Default audio blocksize in msec.  See sys/dev/audio/audio.c */
#if defined(_KERNEL)
#define __AUDIO_BLK_MS (40)
#endif

#endif  /* !_M68K_PARAM_H_ */