100 lines
3.4 KiB
C
100 lines
3.4 KiB
C
/* $NetBSD: param.h,v 1.23 2012/02/10 17:35:48 para Exp $ */
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/*-
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* Copyright (c) 2002 The NetBSD Foundation, Inc. All rights reserved.
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)param.h 5.8 (Berkeley) 6/28/91
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*/
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/*
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* SuperH dependent constants.
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*/
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#ifndef _SH3_PARAM_H_
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#define _SH3_PARAM_H_
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#if defined(_KERNEL) && !defined(_LOCORE)
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#include <machine/cpu.h>
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#endif
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/* NetBSD/sh3 is 4KB page */
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#define PGSHIFT 12
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#define NBPG (1 << PGSHIFT)
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#define PGOFSET (NBPG - 1)
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define DEV_BSIZE (1 << DEV_BSHIFT)
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#define BLKDEV_IOSIZE 2048
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#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
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/*
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* u-space.
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*/
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#define UPAGES 3 /* pages of u-area */
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#define USPACE (UPAGES * NBPG) /* total size of u-area */
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#if UPAGES == 1
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#error "too small u-area"
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#elif UPAGES == 2
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#define P1_STACK /* kernel stack is P1-area */
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#else
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#undef P1_STACK /* kernel stack is P3-area */
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#endif
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#ifndef MSGBUFSIZE
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#define MSGBUFSIZE NBPG /* default message buffer size */
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#endif
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/*
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* Constants related to network buffer management.
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* MCLBYTES must be no larger than NBPG (the software page size), and,
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* on machines that exchange pages of input or output buffers with mbuf
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* clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
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* of the hardware page size.
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*/
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#define MSIZE 256 /* size of an mbuf */
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#ifndef MCLSHIFT
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#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
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/* 2K cluster can hold Ether frame */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of a m_buf cluster */
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/*
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* Minimum and maximum sizes of the kernel malloc arena in PAGE_SIZE-sized
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* logical pages.
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*/
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#define NKMEMPAGES_MIN_DEFAULT ((16 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((128 * 1024 * 1024) >> PAGE_SHIFT)
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#endif /* !_SH3_PARAM_H_ */
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