207 lines
6.8 KiB
C
207 lines
6.8 KiB
C
/* $NetBSD: param.h,v 1.16 1995/06/28 02:43:50 cgd 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. 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, Berkeley and its contributors.
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* 4. 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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* Machine dependent constants for Sun-4c (SPARCstation)
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*/
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#define MACHINE "sparc"
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#define MACHINE_ARCH "sparc"
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#define MID_MACHINE MID_SPARC
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#ifdef _KERNEL /* XXX */
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#include <machine/cpu.h> /* 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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#define ALIGNBYTES 7
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) & ~ALIGNBYTES)
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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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* Three possible cases:
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* sun4 only 8192 bytes/page
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* sun4c/sun4m only 4096 bytes/page
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* sun4/sun4c/sun4m either of the above
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*
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* In the later case NBPG, PGOFSET, and PGSHIFT are encoded in variables
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* initialized early in locore.s. Since they are variables, rather than
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* simple constants, the kernel will not perform slighly worse.
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*/
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#if defined(SUN4) && !defined(SUN4C) && !defined(SUN4M)
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#define NBPG 8192 /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define PGSHIFT SUN4_PGSHIFT /* log2(NBPG) */
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#endif
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#if !defined(SUN4) && (defined(SUN4C) || defined(SUN4M))
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#define NBPG 4096 /* bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define PGSHIFT SUN4CM_PGSHIFT /* log2(NBPG) */
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#endif
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#if defined(SUN4) && (defined(SUN4C) || defined(SUN4M))
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#if defined(_KERNEL) && !defined(LOCORE)
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extern int nbpg, pgofset, pgshift;
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#endif
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#define NBPG nbpg /* bytes/page */
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#define PGOFSET pgofset /* byte offset into page */
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#define PGSHIFT pgshift /* log2(NBPG) */
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#endif
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#define KERNBASE 0xf8000000 /* start of kernel virtual space */
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#define KERNTEXTOFF 0xf8004000 /* 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 CLSIZE 1
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#define CLSIZELOG2 0
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/* NOTE: SSIZE must be multiple of CLSIZE */
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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 CLBYTES (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 128 /* size of an mbuf */
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#define MCLBYTES 2048 /* enough for whole Ethernet packet */
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#define MCLSHIFT 11 /* log2(MCLBYTES) */
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#define MCLOFSET (MCLBYTES - 1)
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#ifndef NMBCLUSTERS
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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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* Size of kernel malloc arena in CLBYTES-sized logical pages.
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*/
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#ifndef NKMEMCLUSTERS
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#define NKMEMCLUSTERS (6 * 1024 * 1024 / CLBYTES)
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#endif
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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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/*
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* dvmamap manages a range of DVMA addresses intended to create double
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* mappings of physical memory. In a way, `dvmamap' is a submap of the
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* VM map `phys_map'. The difference is the use of the `resource map'
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* routines to manage page allocation, allowing DVMA addresses to be
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* allocated and freed from within interrupt routines.
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*
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* Note that `phys_map' can still be used to allocate memory-backed pages
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* in DVMA space.
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*/
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#ifdef _KERNEL
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#ifndef LOCORE
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extern vm_offset_t dvmabase;
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extern struct map *dvmamap;
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#endif
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#endif
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/*
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* The dvma resource map is defined in page units, which are numbered 1 to N.
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* Use these macros to convert to/from virtual addresses.
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*/
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#define rctov(n) (ctob(((n)-1))+dvmabase)
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#define vtorc(v) ((btoc((v)-dvmabase))+1)
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#ifdef _KERNEL
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#ifndef LOCORE
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#define DELAY(n) delay(n)
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#endif
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#endif
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#ifdef _KERNEL
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extern int cputyp;
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extern int cpumod;
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#endif
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/*
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* Values for the cputyp variable.
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*/
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#define CPU_SUN4 0
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#define CPU_SUN4C 1
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#define CPU_SUN4M 2
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/*
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* Values for cpumod (cpu model) variable. XXX currently valid only for sun4
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*/
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#define SUN4_100 0x22
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#define SUN4_200 0x21
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#define SUN4_300 0x23
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#define SUN4_400 0x24
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