207 lines
6.5 KiB
C
207 lines
6.5 KiB
C
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/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* Modified for VAX 940213/Ragge
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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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: @(#)param.h 5.8 (Berkeley) 6/28/91
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* $Id: param.h,v 1.1 1994/08/02 20:20:40 ragge Exp $
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*/
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#ifndef PARAM_H
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#define PARAM_H
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#include "psl.h"
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/*
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* Machine dependent constants for VAX.
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*/
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#define MACHINE "vax"
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#define MID_MACHINE MID_VAX
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#define UNIX "vmunix"
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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 PGSHIFT 9 /* LOG2(NBPG) */
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#define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */
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#define PGOFSET (NBPG-1) /* byte offset into page */
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#define NPTEPG (NBPG/(sizeof (struct pte)))
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#define KERNBASE 0x80000000 /* start of kernel virtual */
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#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
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#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
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#define DEV_BSIZE (1 << DEV_BSHIFT)
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#define BLKDEV_IOSIZE 2048
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#define MAXPHYS (63 * 1024) /* max raw I/O transfer size */
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#define CLSIZELOG2 2
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#define CLSIZE (1 << CLSIZELOG2)
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/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
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#define SSIZE 4 /* initial stack size/NBPG */
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#define SINCR 4 /* increment of stack/NBPG */
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#define UPAGES 16 /* 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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#ifndef MSIZE
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#define MSIZE 128 /* size of an mbuf */
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#endif /* MSIZE */
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#ifndef MCLSHIFT
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#define MCLSHIFT 10 /* convert bytes to m_buf clusters */
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#endif /* MCLSHIFT */
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#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
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#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
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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 /* GATEWAY */
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#endif /* NMBCLUSTERS */
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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 (512*1024/CLBYTES)
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#endif
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/*
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* Some macros for units conversion
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*/
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/* Core clicks (4096 bytes) to segments and vice versa */
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#define ctos(x) (x)
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#define stoc(x) (x)
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/* Core 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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/* clicks to bytes */
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#define ctob(x) ((x)<<PGSHIFT)
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/* bytes to clicks */
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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 will be if we
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* add an entry to cdevsw/bdevsw for that purpose.
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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 vax_round_pdr(x) ((((unsigned)(x)) + NBPDR - 1) & ~(NBPDR-1))
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#define vax_trunc_pdr(x) ((unsigned)(x) & ~(NBPDR-1))
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#define vax_round_page(x) ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
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#define vax_trunc_page(x) ((unsigned)(x) & ~(NBPG-1))
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#define vax_btod(x) ((unsigned)(x) >> PDRSHIFT)
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#define vax_dtob(x) ((unsigned)(x) << PDRSHIFT)
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#define vax_btop(x) ((unsigned)(x) >> PGSHIFT)
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#define vax_ptob(x) ((unsigned)(x) << PGSHIFT)
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#define DELAY(x) kern_delay(x)
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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 ("mfpr $18,%0; mtpr $%1,$18; " : \
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"&=r" (_spl_r) : "ir" (s)); \
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_spl_r; \
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})
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*/
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/* spl0 requires checking for software interrupts */
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#define splsoftclock() _spl(PSL2IPL(PSL_IPL08))
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#define splnet() _spl(PSL2IPL(PSL_IPL0C))
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#define spl4() _spl(PSL2IPL(PSL_IPL14))
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#define spltty() _spl(PSL2IPL(PSL_IPL15))
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#define splbio() _spl(PSL2IPL(PSL_IPL15))
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#define splimp() _spl(PSL2IPL(PSL_IPL16))
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#define splclock() _spl(PSL2IPL(PSL_IPL18))
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#define splhigh() _spl(PSL2IPL(PSL_IPL1F))
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#define splstatclock() splclock()
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/*
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#define splvm() _spl(PSL2IPL(PSL_IPL14))
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#define splsched() _spl(PSL2IPL(PSL_IPL14))
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*/
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/* watch out for side effects */
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#define splx(s) (s ? _spl(s) : spl0())
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#define ovbcopy(x,y,z) bcopy(x,y,z) /* This should work i hope... */
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#endif
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