200 lines
7.0 KiB
C
200 lines
7.0 KiB
C
/* $NetBSD: param.h,v 1.61 2003/08/07 16:29:40 agc Exp $ */
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Lawrence Berkeley Laboratory.
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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 8.1 (Berkeley) 6/11/93
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*/
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/*
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* Sun4M support by Aaron Brown, Harvard University.
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* Changes Copyright (c) 1995 The President and Fellows of Harvard College.
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* All rights reserved.
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*/
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#define _MACHINE sparc
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#define MACHINE "sparc"
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#define _MACHINE_ARCH sparc
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#define MACHINE_ARCH "sparc"
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#define MID_MACHINE MID_SPARC
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#include <machine/cpuconf.h> /* XXX */
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#ifdef _KERNEL /* XXX */
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#ifndef _LOCORE /* XXX */
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#include <machine/cpu.h> /* XXX */
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#endif /* XXX */
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#endif /* XXX */
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value for
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* the machine's strictest data type. The result is u_int and must be
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* cast to any desired pointer type.
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*
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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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*/
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#define ALIGNBYTES 7
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
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#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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#define SUN4_PGSHIFT 13 /* for a sun4 machine */
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#define SUN4CM_PGSHIFT 12 /* for a sun4c or sun4m machine */
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/*
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* The following variables are always defined and initialized (in locore)
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* so independently compiled modules (e.g. LKMs) can be used irrespective
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* of the `options SUN4?' combination a particular kernel was configured with.
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* See also the definitions of NBPG, PGOFSET and PGSHIFT below.
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*/
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#if (defined(_KERNEL) || defined(_STANDALONE)) && !defined(_LOCORE)
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extern int nbpg, pgofset, pgshift;
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#endif
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#define KERNBASE 0xf0000000 /* start of kernel virtual space */
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#define KERNEND 0xfe000000 /* end of kernel virtual space */
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/* Arbitrarily only use 1/4 of the kernel address space for buffers. */
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#define VM_MAX_KERNEL_BUF ((KERNEND - KERNBASE)/4)
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#define PROM_LOADADDR 0x00004000 /* where the prom loads us */
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#define KERNTEXTOFF (KERNBASE+PROM_LOADADDR)/* start of kernel text */
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#define DEV_BSIZE 512
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define BLKDEV_IOSIZE 2048
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#define MAXPHYS (64 * 1024)
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#define SSIZE 1 /* initial stack size in pages */
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#define USPACE 8192
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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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#ifndef NMBCLUSTERS
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#if defined(_KERNEL_OPT)
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#include "opt_gateway.h"
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#endif
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#ifdef GATEWAY
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#define NMBCLUSTERS 512 /* map size, max cluster allocation */
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#else
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#define NMBCLUSTERS 256 /* map size, max cluster allocation */
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#endif
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#endif
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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 ((6 * 1024 * 1024) >> PAGE_SHIFT)
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#define NKMEMPAGES_MAX_DEFAULT ((6 * 1024 * 1024) >> PAGE_SHIFT)
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/* pages ("clicks") to disk blocks */
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#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
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#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
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/* pages to bytes */
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#define ctob(x) ((x) << PGSHIFT)
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#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
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/* bytes to disk blocks */
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#define btodb(x) ((x) >> DEV_BSHIFT)
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#define dbtob(x) ((x) << DEV_BSHIFT)
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/*
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* Map a ``block device block'' to a file system block.
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* This should be device dependent, and should use the bsize
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* field from the disk label.
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* For now though just use DEV_BSIZE.
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*/
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#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE / DEV_BSIZE))
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#if defined(_KERNEL) || defined(_STANDALONE)
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#ifndef _LOCORE
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extern void delay __P((unsigned int));
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#define DELAY(n) delay(n)
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#endif /* _LOCORE */
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/*
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* microSPARC-IIep is a sun4m but with an integrated PCI controller.
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* In a lot of places (like pmap &c) we want it to be treated as SUN4M.
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* But since various low-level things are done very differently from
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* normal sparcs (and since for now it requires a relocated kernel
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* anyway), the MSIIEP kernels are not supposed to support any other
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* system. So insist on SUN4M defined and SUN4 and SUN4C not defined.
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*/
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#if defined(MSIIEP)
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#if defined(SUN4) || defined(SUN4C) || defined(SUN4D)
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#error "microSPARC-IIep kernels cannot support sun4, sun4c, or sun4d"
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#endif
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#if !defined(SUN4M)
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#error "microSPARC-IIep kernel must have 'options SUN4M'"
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#endif
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#endif /* MSIIEP */
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/*
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* Sun4 machines have a page size of 8192. All other machines have a page
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* size of 4096. Short cut page size variables if we can.
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*/
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#if CPU_NTYPES != 0 && !defined(SUN4)
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# define NBPG 4096
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# define PGOFSET (NBPG-1)
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# define PGSHIFT SUN4CM_PGSHIFT
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#elif CPU_NTYPES == 1 && defined(SUN4)
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# define NBPG 8192
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# define PGOFSET (NBPG-1)
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# define PGSHIFT SUN4_PGSHIFT
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#else
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# define NBPG nbpg
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# define PGOFSET pgofset
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# define PGSHIFT pgshift
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#endif
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#endif /* _KERNEL || _STANDALONE */
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