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/* $NetBSD: param.h,v 1.34 1996/03/04 05:04:40 cgd Exp $ */
/*
* Copyright (c) 1994, 1995 Gordon W. Ross
* Copyright (c) 1993 Adam Glass
* Copyright (c) 1988 University of Utah.
* Copyright (c) 1982, 1986, 1990, 1993
* 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.
*
* from: Utah Hdr: machparam.h 1.16 92/12/20
* from: @(#)param.h 8.1 (Berkeley) 6/10/93
*/
#ifndef MACHINE
/*
* Machine dependent constants for the Sun3 series.
*/
#define _MACHINE sun3
#define MACHINE "sun3"
#define _MACHINE_ARCH m68k
#define MACHINE_ARCH "m68k"
#define MID_MACHINE MID_M68K
/*
* 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 3
#define ALIGN(p) (((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
#define NBPG 8192 /* bytes/page */
#define PGOFSET (NBPG-1) /* byte offset into page */
#define PGSHIFT 13 /* LOG2(NBPG) */
#define NBSG 0x20000 /* bytes/segment */
#define SEGOFSET (NBSG-1) /* byte offset into segment */
#define SEGSHIFT 17 /* LOG2(NBSG) */
#define KERNBASE 0x0E000000 /* start of kernel virtual */
#define BTOPKERNBASE ((u_long)KERNBASE >> PGSHIFT)
#define KERNTEXTOFF 0x0E004000 /* start of kernel text */
#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 2 /* pages of u-area */
#define USPACE (UPAGES << PGSHIFT)
/*
* 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 MCLSHIFT 11
#define MCLBYTES (1 << MCLSHIFT) /* large enough for ether MTU */
#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") to disk blocks */
#define ctod(x) ((x) << (PGSHIFT - DEV_BSHIFT))
#define dtoc(x) ((x) >> (PGSHIFT - DEV_BSHIFT))
/* pages to bytes */
#define ctob(x) ((x) << PGSHIFT)
#define btoc(x) (((x) + PGOFSET) >> 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 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 sun3_round_seg(x) ((((unsigned)(x)) + SEGOFSET) & ~SEGOFSET)
#define sun3_trunc_seg(x) ((unsigned)(x) & ~SEGOFSET)
#define sun3_btos(x) ((unsigned)(x) >> SEGSHIFT)
#define sun3_stob(x) ((unsigned)(x) << SEGSHIFT)
#define sun3_round_page(x) ((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
#define sun3_trunc_page(x) ((unsigned)(x) & ~PGOFSET)
#define sun3_btop(x) ((unsigned)(x) >> PGSHIFT)
#define sun3_ptob(x) ((unsigned)(x) << PGSHIFT)
#include <machine/psl.h>
#if defined(_KERNEL) && !defined(_LOCORE)
#ifndef __GNUC__
/* No inline, use real function in locore.s */
extern int _spl(int new);
#else /* GNUC */
/*
* Define an inline function for PSL manipulation.
* This is as close to a macro as one can get.
* If not optimizing, the one in locore.s is used.
* (See the GCC extensions info document.)
*/
extern __inline__ int _spl(int new)
{
register int old;
__asm __volatile (
"clrl %0; movew sr,%0; movew %1,sr" :
"&=d" (old) : "di" (new));
return (old);
}
#endif /* GNUC */
/*
* The rest of this is sun3 specific, because other ports may
* need to do special things in spl0() (i.e. simulate SIR).
* Suns have a REAL interrupt register, so spl0() and splx(s)
* have no need to check for any simulated interrupts, etc.
*/
#define spl0() _spl(PSL_S|PSL_IPL0)
#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)
#define splx(x) _spl(x)
/* IPL used by soft interrupts: netintr(), softclock() */
#define splsoftclock() spl1()
#define splsoftnet() spl1()
/* Highest block device (strategy) IPL. */
#define splbio() spl2()
/* Highest network interface IPL. */
#define splnet() spl3()
/* Highest tty device IPL. */
#define spltty() spl4()
/* Requirement: imp >= (highest network, tty, or disk IPL) */
#define splimp() spl4()
/* Intersil clock hardware interrupts (hard-wired at 5) */
#define splclock() spl5()
#define splstatclock() splclock()
/* Zilog Serial hardware interrupts (hard-wired at 6) */
#define splzs() spl6()
/* Block out all interrupts (except NMI of course). */
#define splhigh() spl7()
#define splsched() spl7()
/* Get current sr value (debug, etc.) */
extern int getsr __P((void));
extern void _delay __P((unsigned));
#define delay(us) _delay((us)<<8)
#define DELAY(n) delay(n)
#endif /* _KERNEL && !_LOCORE */
#endif /* MACHINE */
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