NetBSD/sys/arch/mac68k/include/param.h

256 lines
9.5 KiB
C

/*
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
/*-
* Copyright (C) 1993 Allen K. Briggs, Chris P. Caputo,
* Michael L. Finch, Bradley A. Grantham, and
* Lawrence A. Kesteloot
* All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Alice Group.
* 4. The names of the Alice Group or any of its members may not be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``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 ALICE GROUP 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.
*
*/
#ident "$Id: param.h,v 1.1.1.1 1993/09/29 06:09:22 briggs Exp $"
/*
* from: Utah $Hdr: machparam.h 1.11 89/08/14$
*
* @(#)param.h 7.8 (Berkeley) 6/28/91
*/
#ifndef PSL_IPL
#include "machine/psl.h"
#endif /* PSL_IPL */
#include "machine/exec.h"
/*
* Machine dependent constants for Macintosh II series.
ALICE
BG 05/24/92,17:46:53
Well, I've tried to make this as macII-specific as possible.
It's difficult without knowing exactly what these things do.
06/03/92,14:12:35 BG
I've done a little more messing around; I think we're basically
done for now except for tweeking.
*/
#define MACHINE "mac"
/*
* Round p (pointer or byte index) up to a correctly-aligned value
* for all data types (int, long, ...). The result is u_int and
* must be cast to any desired pointer type.
*/
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define NBPG 4096 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 12 /* LOG2(NBPG) */
#define NPTEPG (NBPG/(sizeof (struct pte)))
#define NBSEG (1024*NBPG) /* bytes/segment */
#define SEGOFSET (NBSEG-1) /* byte offset into segment */
#define SEGSHIFT 22 /* LOG2(NBSEG) */
/* ALICE 05/24/92,19:31:42 BG -- Well, I wish we didn't have to worry */
/* about re-locating the kernel, but I think we will probably have to. */
#define KERNBASE 0x00000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define DEV_BSIZE 512
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (64 * 1024) /* max raw I/O transfer size */
#define CLSIZE 1
#define CLSIZELOG2 0
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 1 /* initial stack size/NBPG */
#define SINCR 1 /* increment of stack/NBPG */
#define UPAGES 3 /* pages of u-area */
/*
* Constants related to network buffer management.
* MCLBYTES must be no larger than CLBYTES (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 128 /* size of an mbuf */
#define MCLBYTES 1024
#define MCLSHIFT 10
#define MCLOFSET (MCLBYTES - 1)
#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
#endif
#endif
/*
* Size of kernel malloc arena in CLBYTES-sized logical pages
*/
#ifndef NKMEMCLUSTERS
#define NKMEMCLUSTERS (2048*1024/CLBYTES)
#endif
/* pages ("clicks") (4096 bytes) to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
#define dtob(x) ((x)<<DEV_BSHIFT)
/* pages to bytes */
#define ctob(x) ((x)<<PGSHIFT)
/* bytes to pages */
#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)
#define btodb(bytes) /* calculates (bytes / DEV_BSIZE) */ \
((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db) /* calculates (db * DEV_BSIZE) */ \
((unsigned)(db) << DEV_BSHIFT)
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and should use the bsize
* field from the disk label.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
/*
* Mach derived conversion macros
*/
#define macII_round_seg(x) ((((unsigned)(x)) + NBSEG - 1) & ~(NBSEG-1))
#define macII_trunc_seg(x) ((unsigned)(x) & ~(NBSEG-1))
#define macII_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define macII_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
#define macII_btos(x) ((unsigned)(x) >> SEGSHIFT)
#define macII_stob(x) ((unsigned)(x) << SEGSHIFT)
#define macII_btop(x) ((unsigned)(x) >> PGSHIFT)
#define macII_ptob(x) ((unsigned)(x) << PGSHIFT)
/*
* spl functions; all but spl0 are done in-line
*/
#define _spl(s) \
({ \
register int _spl_r; \
\
asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
"&=d" (_spl_r) : "di" (s)); \
_spl_r; \
})
/* spl0 requires checking for software interrupts */
#if defined(BARF_BARF_BARF)
#define spl1() _spl(PSL_S|PSL_IPL1)
#define spl2() _spl(PSL_S|PSL_IPL2)
#define spl3() _spl(PSL_S|PSL_IPL3)
#define spl4() _spl(PSL_S|PSL_IPL4)
#define spl5() _spl(PSL_S|PSL_IPL5)
#define spl6() _spl(PSL_S|PSL_IPL6)
#define spl7() _spl(PSL_S|PSL_IPL7)
#else /* not BARF_BARF_BARF */
#define spl1() _spl(PSL_S|PSL_IPL3)
#define spl2() _spl(PSL_S|PSL_IPL3)
#define spl3() _spl(PSL_S|PSL_IPL3)
#define spl4() _spl(PSL_S|PSL_IPL3)
#define spl5() _spl(PSL_S|PSL_IPL3)
#define spl6() _spl(PSL_S|PSL_IPL3)
#define spl7() _spl(PSL_S|PSL_IPL7) /* spl7() always excludes everything */
#endif /* BARF_BARF_BARF */
/* ALICE 06/03/92,14:08:28 BG I guess we could put in some spl's for various */
/* devices like VIA1 interrupt, and so on. */
/* BARF -- These should be used for:
1) ensuring mutual exclusion (why use processor level?)
2) allowing faster devices to take priority
*/
#define splsoftclock() spl1() /* disallow softclock */
#define splnet() spl1() /* disallow network */
#define splbio() spl5() /* disallow block I/O */
#define splimp() spl5() /* disallow imput */
#define spltty() spl5() /* disallow tty interrupts */
#define splclock() spl6() /* disallow clock interrupt */
#define splvm() spl6() /* disallow virtual memory operations */
#define splhigh() spl7() /* disallow everything */
#define splsched() spl7() /* disallow scheduling */
/* watch out for side effects */
#define splx(s) ((s) & PSL_IPL ? _spl(s) : spl0())
#ifdef KERNEL
#ifndef LOCORE
int cpuspeed;
#define DELAY(n) { register int N = cpuspeed * (n); while (--N > 0); }
#endif
#else
#define DELAY(n) { register int N = (n); while (--N > 0); }
#endif