244 lines
9.4 KiB
C
244 lines
9.4 KiB
C
/*
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 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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* the Systems Programming Group of the University of Utah Computer
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* Science Department.
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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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/*-
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* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
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* Michael L. Finch, Bradley A. Grantham, and
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* Lawrence A. Kesteloot
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* All rights reserved.
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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 Alice Group.
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* 4. The names of the Alice Group or any of its members may not be used
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* to endorse or promote products derived from this software without
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* specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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*/
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/*
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* from: Utah $Hdr: machparam.h 1.11 89/08/14$
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*
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* from: @(#)param.h 7.8 (Berkeley) 6/28/91
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* $Id: param.h,v 1.8 1994/01/30 00:53:07 briggs Exp $
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*/
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#ifndef PSL_IPL
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#include "machine/psl.h"
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#endif /* PSL_IPL */
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/*
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* Machine dependent constants for Macintosh II-and-similar series.
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ALICE
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BG 05/24/92,17:46:53
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Well, I've tried to make this as mac68k-specific as possible.
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It's difficult without knowing exactly what these things do.
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06/03/92,14:12:35 BG
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I've done a little more messing around; I think we're basically
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done for now except for tweeking.
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*/
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#define MACHINE "mac68k"
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#define MACHINE_ARCH "m68k"
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#define MID_MACHINE MID_M68K
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/*
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* Round p (pointer or byte index) up to a correctly-aligned value
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* for all data types (int, long, ...). The result is u_int and
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* must be cast to any desired pointer type.
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*/
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#define ALIGNBYTES (sizeof(int) - 1)
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
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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 12 /* LOG2(NBPG) */
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#define NPTEPG (NBPG/(sizeof (struct pte)))
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#define NBSEG (1024*NBPG) /* bytes/segment */
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#define SEGOFSET (NBSEG-1) /* byte offset into segment */
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#define SEGSHIFT 22 /* LOG2(NBSEG) */
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/* ALICE 05/24/92,19:31:42 BG -- Well, I wish we didn't have to worry */
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/* about re-locating the kernel, but I think we will probably have to. */
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#define KERNBASE 0x00000000 /* start of kernel virtual */
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#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
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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) /* max raw I/O transfer size */
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#define CLSIZE 1
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#define CLSIZELOG2 0
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/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
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#define SSIZE 1 /* initial stack size/NBPG */
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#define SINCR 1 /* increment of stack/NBPG */
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#define UPAGES 3 /* pages of u-area */
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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 1024
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#define MCLSHIFT 10
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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 (2048*1024/CLBYTES)
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#endif
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/* pages ("clicks") (4096 bytes) 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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#define dtob(x) ((x)<<DEV_BSHIFT)
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/* pages to bytes */
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#define ctob(x) ((x)<<PGSHIFT)
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/* bytes to pages */
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#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
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#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
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((unsigned)(bytes) >> DEV_BSHIFT)
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#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
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((unsigned)(db) << 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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* Mach derived conversion macros
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*/
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#define mac68k_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
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#define mac68k_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1))
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#define mac68k_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
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#define mac68k_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
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#define mac68k_btos(x) ((unsigned)(x) >> SEGSHIFT)
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#define mac68k_stob(x) ((unsigned)(x) << SEGSHIFT)
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#define mac68k_btop(x) ((unsigned)(x) >> PGSHIFT)
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#define mac68k_ptob(x) ((unsigned)(x) << PGSHIFT)
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/*
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* spl functions; all but spl0 are done in-line
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*/
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#define _spl(s) \
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({ \
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register int _spl_r; \
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\
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asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
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"&=d" (_spl_r) : "di" (s)); \
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_spl_r; \
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})
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/* spl0 requires checking for software interrupts */
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#if defined(BARF_BARF_BARF)
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#define spl1() _spl(PSL_S|PSL_IPL1)
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#define spl2() _spl(PSL_S|PSL_IPL2)
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#define spl3() _spl(PSL_S|PSL_IPL3)
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#define spl4() _spl(PSL_S|PSL_IPL4)
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#define spl5() _spl(PSL_S|PSL_IPL5)
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#define spl6() _spl(PSL_S|PSL_IPL6)
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#define spl7() _spl(PSL_S|PSL_IPL7)
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#else /* not BARF_BARF_BARF */
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#define spl1() _spl(PSL_S|PSL_IPL3)
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#define spl2() _spl(PSL_S|PSL_IPL3)
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#define spl3() _spl(PSL_S|PSL_IPL3)
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#define spl4() _spl(PSL_S|PSL_IPL3)
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#define spl5() _spl(PSL_S|PSL_IPL3)
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#define spl6() _spl(PSL_S|PSL_IPL3)
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#define spl7() _spl(PSL_S|PSL_IPL7) /* spl7() always excludes everything */
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#endif /* BARF_BARF_BARF */
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/* ALICE 06/03/92,14:08:28 BG I guess we could put in some spl's for various */
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/* devices like VIA1 interrupt, and so on. */
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/* BARF -- These should be used for:
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1) ensuring mutual exclusion (why use processor level?)
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2) allowing faster devices to take priority
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*/
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#define splsoftclock() spl1() /* disallow softclock */
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#define splnet() spl1() /* disallow network */
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#define splbio() spl5() /* disallow block I/O */
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#define splimp() spl5() /* disallow imput */
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#define spltty() spl5() /* disallow tty interrupts */
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#define splclock() spl6() /* disallow clock interrupt */
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#define splvm() spl6() /* disallow virtual memory operations */
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#define splhigh() spl7() /* disallow everything */
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#define splsched() spl7() /* disallow scheduling */
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/* watch out for side effects */
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#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
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