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/* $OpenBSD: param.h,v 1.9 1997/09/12 09:21:22 maja Exp $ */
/* $NetBSD: param.h,v 1.24 1997/08/05 13:28:51 ragge Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
*
* @(#)param.h 5.8 (Berkeley) 6/28/91
*/
#ifndef _VAX_PARAM_H_
#define _VAX_PARAM_H_
#include <machine/macros.h>
#include <machine/psl.h>
/*
* Machine dependent constants for VAX.
*/
#define _MACHINE vax
#define MACHINE "vax"
#define _MACHINE_ARCH vax
#define MACHINE_ARCH "vax"
#define MID_MACHINE MID_VAX
/*
* 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.
*
* ALIGNED_POINTER is a boolean macro that checks whether an address
* is valid to fetch data elements of type t from on this architecture.
* This does not reflect the optimal alignment, just the possibility
* (within reasonable limits).
*
*/
#define ALIGNBYTES (sizeof(int) - 1)
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t)-1)) == 0)
#define PGSHIFT 9 /* LOG2(NBPG) */
#define NBPG (1<<PGSHIFT) /* (1 << PGSHIFT) bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define NPTEPG (NBPG/(sizeof (struct pte)))
#define KERNBASE 0x80000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define DEV_BSHIFT 9 /* log2(DEV_BSIZE) */
#define DEV_BSIZE (1 << DEV_BSHIFT)
#define BLKDEV_IOSIZE 2048
#define MAXPHYS (63 * 1024) /* max raw I/O transfer size */
#ifdef 0
#define MAXBSIZE 0x4000 /* max FS block size - XXX */
#endif
#define CLSIZELOG2 1
#define CLSIZE 2
/* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
#define SSIZE 4 /* initial stack size/NBPG */
#define SINCR 4 /* increment of stack/NBPG */
#define UPAGES 16 /* pages of u-area */
#define USPACE (NBPG*UPAGES)
/*
* 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.
*/
#ifndef MSIZE
#define MSIZE 128 /* size of an mbuf */
#endif /* MSIZE */
#ifndef MCLSHIFT
#define MCLSHIFT 11 /* convert bytes to m_buf clusters */
#endif /* MCLSHIFT */
#define MCLBYTES (1 << MCLSHIFT) /* size of an m_buf cluster */
#define MCLOFSET (MCLBYTES - 1) /* offset within an m_buf cluster */
#ifndef NMBCLUSTERS
#ifdef GATEWAY
#define NMBCLUSTERS 512 /* map size, max cluster allocation */
#else
#define NMBCLUSTERS 256 /* map size, max cluster allocation */
#endif /* GATEWAY */
#endif /* NMBCLUSTERS */
/*
* Size of kernel malloc arena in CLBYTES-sized logical pages
*/
#ifndef NKMEMCLUSTERS
#define NKMEMCLUSTERS (2048*1024/CLBYTES)
#endif
/*
* Some macros for units conversion
*/
/* pages ("clicks") to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/* clicks to bytes */
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> PGSHIFT)
#define btop(x) (((unsigned)(x)) >> PGSHIFT)
/* bytes to disk blocks */
#define btodb(x) ((x) >> DEV_BSHIFT)
#define dbtob(x) ((x) << DEV_BSHIFT)
/*
* Map a ``block device block'' to a file system block.
* This should be device dependent, and will be if we
* add an entry to cdevsw/bdevsw for that purpose.
* For now though just use DEV_BSIZE.
*/
#define bdbtofsb(bn) ((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
#define splx(reg) \
({ \
register int val; \
asm __volatile ("mfpr $0x12,%0;mtpr %1,$0x12" \
: "&=g" (val) \
: "g" (reg)); \
val; \
})
#define spl0() splx(0) /* IPL0 */
#define splsoftclock() splx(8) /* IPL08 */
#define splsoftnet() splx(0xc) /* IPL0C */
#define splddb() splx(0xf) /* IPL0F */
#define splbio() splx(0x15) /* IPL15 */
#define splnet() splx(0x15) /* IPL15 */
#define spltty() splx(0x15) /* IPL15 */
#define splimp() splx(0x17) /* IPL17 */
#define splclock() splx(0x18) /* IPL18 */
#define splhigh() splx(0x1f) /* IPL1F */
#define splstatclock() splclock()
/* These are better to use when playing with VAX buses */
#define spl4() splx(0x14)
#define spl5() splx(0x15)
#define spl6() splx(0x16)
#define spl7() splx(0x17)
#define ovbcopy(x,y,z) bcopy(x,y,z)
#if !defined(VAX410) && !defined(VAX43)
#define vmapbuf(p,q)
#define vunmapbuf(p,q)
#endif
#ifdef _KERNEL
/* Prototype needed for delay() */
#ifndef _LOCORE
void delay __P((int));
#endif
#define DELAY(x) delay(x)
#endif /* _KERNEL */
#endif /* _VAX_PARAM_H_ */
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