200 lines
6.6 KiB
C
200 lines
6.6 KiB
C
/* $NetBSD: param.h,v 1.23 1997/02/24 23:23:06 fvdl Exp $ */
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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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* 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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* @(#)param.h 5.8 (Berkeley) 6/28/91
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*/
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#ifndef _VAX_PARAM_H_
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#define _VAX_PARAM_H_
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#include <machine/macros.h>
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#include <machine/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 MACHINE "vax"
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#define _MACHINE_ARCH vax
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#define MACHINE_ARCH "vax"
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#define MID_MACHINE MID_VAX
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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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* ALIGNED_POINTER is a boolean macro that checks whether an address
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* is valid to fetch data elements of type t from on this architecture.
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* This does not reflect the optimal alignment, just the possibility
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* (within reasonable limits).
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*
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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 ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
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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 MAXBSIZE 0x4000 /* max FS block size - XXX */
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#define CLSIZELOG2 1
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#define CLSIZE 2
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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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#define USPACE (NBPG*UPAGES)
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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 (2048*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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/* 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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/* clicks 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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#define btop(x) (((unsigned)(x)) >> 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 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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#define splx(reg) \
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({ \
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register int val; \
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asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \
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: "&=g" (val) \
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: "g" (reg)); \
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val; \
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})
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#define spl0() splx(0) /* IPL0 */
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#define splsoftclock() splx(8) /* IPL08 */
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#define splsoftnet() splx(0xc) /* IPL0C */
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#define splddb() splx(0xf) /* IPL0F */
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#define splbio() splx(0x15) /* IPL15 */
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#define splnet() splx(0x15) /* IPL15 */
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#define spltty() splx(0x15) /* IPL15 */
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#define splimp() splx(0x17) /* IPL17 */
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#define splclock() splx(0x18) /* IPL18 */
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#define splhigh() splx(0x1f) /* IPL1F */
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#define splstatclock() splclock()
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/* These are better to use when playing with VAX buses */
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#define spl4() splx(0x14)
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#define spl5() splx(0x15)
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#define spl6() splx(0x16)
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#define spl7() splx(0x17)
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#define ovbcopy(x,y,z) bcopy(x,y,z)
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#if !defined(VAX410) && !defined(VAX43)
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#define vmapbuf(p,q)
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#define vunmapbuf(p,q)
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#endif
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/* Prototype needed for delay() */
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#ifndef _LOCORE
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void delay __P((int));
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#endif
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#define DELAY(x) delay(x)
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#endif /* _VAX_PARAM_H_ */
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