205 lines
6.7 KiB
C
205 lines
6.7 KiB
C
/* $NetBSD: param.h,v 1.23 1994/11/28 19:13:18 gwr Exp $ */
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/*
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* Copyright (c) 1994 Gordon W. Ross
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* Copyright (c) 1993 Adam Glass
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* Copyright (c) 1988 University of Utah.
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. 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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* from: Utah Hdr: machparam.h 1.16 92/12/20
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* from: @(#)param.h 8.1 (Berkeley) 6/10/93
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*/
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#ifndef MACHINE
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/*
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* Machine dependent constants for the Sun3 series.
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*/
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#define MACHINE "sun3"
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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 3
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#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
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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 13 /* LOG2(NBPG) */
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#define NBSG 0x20000 /* bytes/segment */
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#define SEGOFSET (NBSG-1) /* byte offset into segment */
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#define SEGSHIFT 17 /* LOG2(NBSG) */
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#define KERNBASE 0x0E000000 /* 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 2 /* pages of u-area */
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#define USPACE (UPAGES << PGSHIFT)
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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 /* large enough for ether MTU */
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#define MCLSHIFT 11
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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 sun3_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET)
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#define sun3_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET)
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#define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT)
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#define sun3_stob(x) ((unsigned)(x) << SEGSHIFT)
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#define sun3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
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#define sun3_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
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#define sun3_btop(x) ((unsigned)(x) >> PGSHIFT)
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#define sun3_ptob(x) ((unsigned)(x) << PGSHIFT)
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/*
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* Suns have a REAL interrupt register, so spl0() and splx(s)
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* have no need to check for any simulated interrupts, etc.
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* All are done in-line (if optimization turned on).
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*/
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#include <machine/psl.h>
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#ifdef __GNUC__
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/*
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* This is as close to a macro as one can get.
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* (See the GCC extensions info document.)
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*/
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extern __inline__ int _spl(int new)
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{
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register int old;
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__asm__ __volatile ("clrl %0; movw sr,%0; movw %1,sr" :
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"&=d" (old) : "di" (new));
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return (old);
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}
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#endif /* GNUC */
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#define spl0() _spl(PSL_S|PSL_IPL0)
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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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#define splx(x) _spl(x)
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#define splsoftclock() spl1()
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#define splnet() spl3()
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#define splbio() spl2()
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#define splimp() spl3()
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#define spltty() spl2()
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#define splzs() spl6()
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#define splclock() spl5()
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#define splstatclock() splclock()
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#define splvm() splimp()
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#define splhigh() spl7()
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#define splsched() spl7()
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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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#else
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#define DELAY(n) { register int N = (n); while (--N > 0); }
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#endif
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#endif /* MACHINE */
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