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param.h revision 1.4 
      1 /*	$NetBSD: param.h,v 1.4 1997/06/10 07:54:48 veego Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1988 University of Utah.
      5  * Copyright (c) 1982, 1986, 1990, 1993
      6  *	The Regents of the University of California.  All rights reserved.
      7  *
      8  * This code is derived from software contributed to Berkeley by
      9  * the Systems Programming Group of the University of Utah Computer
     10  * Science Department.
     11  *
     12  * Redistribution and use in source and binary forms, with or without
     13  * modification, are permitted provided that the following conditions
     14  * are met:
     15  * 1. Redistributions of source code must retain the above copyright
     16  *    notice, this list of conditions and the following disclaimer.
     17  * 2. Redistributions in binary form must reproduce the above copyright
     18  *    notice, this list of conditions and the following disclaimer in the
     19  *    documentation and/or other materials provided with the distribution.
     20  * 3. All advertising materials mentioning features or use of this software
     21  *    must display the following acknowledgement:
     22  *	This product includes software developed by the University of
     23  *	California, Berkeley and its contributors.
     24  * 4. Neither the name of the University nor the names of its contributors
     25  *    may be used to endorse or promote products derived from this software
     26  *    without specific prior written permission.
     27  *
     28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     38  * SUCH DAMAGE.
     39  *
     40  * from: Utah $Hdr: machparam.h 1.16 92/12/20$
     41  *
     42  *	@(#)param.h	8.1 (Berkeley) 6/10/93
     43  */
     44 
     45 #ifndef	_MACHINE_PARAM_H_
     46 #define	_MACHINE_PARAM_H_
     47 
     48 /*
     49  * Machine dependent constants for x68k
     50  */
     51 #define	_MACHINE	x68k
     52 #define	MACHINE		"x68k"
     53 
     54 #define	PGSHIFT		12		/* LOG2(NBPG) */
     55 #define	KERNBASE	0x00000000	/* start of kernel virtual */
     56 
     57 #define	UPAGES		3		/* pages of u-area */
     58 
     59 #include <m68k/param.h>
     60 
     61 #define	SEGSHIFT	22		/* LOG2(NBSEG) */
     62 #define NBSEG		(1 << SEGSHIFT)	/* bytes/segment */
     63 #define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
     64 
     65 /*
     66  * Size of kernel malloc arena in CLBYTES-sized logical pages
     67  */
     68 #ifndef NKMEMCLUSTERS
     69 # define	NKMEMCLUSTERS	(2048 * 1024 / CLBYTES)
     70 #endif
     71 
     72 /*
     73  * Mach derived conversion macros
     74  */
     75 #define x68k_round_page(x)	((((unsigned)(x)) + PGOFSET) & ~PGOFSET)
     76 #define x68k_trunc_page(x)	((unsigned)(x) & ~PGOFSET)
     77 #define x68k_btop(x)		((unsigned)(x) >> PGSHIFT)
     78 #define x68k_ptob(x)		((unsigned)(x) << PGSHIFT)
     79 
     80 /*
     81  * spl functions; all but spl0 are done in-line
     82  */
     83 #include <machine/psl.h>
     84 
     85 #define _spl(s) \
     86 ({ \
     87         register int _spl_r; \
     88 \
     89         __asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
     90                 "&=d" (_spl_r) : "di" (s)); \
     91         _spl_r; \
     92 })
     93 
     94 /* spl0 requires checking for software interrupts */
     95 void    spl0();
     96 #define spl1()  _spl(PSL_S|PSL_IPL1)
     97 #define spl2()  _spl(PSL_S|PSL_IPL2)
     98 #define spl3()  _spl(PSL_S|PSL_IPL3)
     99 #define spl4()  _spl(PSL_S|PSL_IPL4)
    100 #define spl5()  _spl(PSL_S|PSL_IPL5)
    101 #define spl6()  _spl(PSL_S|PSL_IPL6)
    102 #define spl7()  _spl(PSL_S|PSL_IPL7)
    103 
    104 #define splnone()       spl0()
    105 #define splsoftclock()  spl1()  /* disallow softclock */
    106 #define splsoftnet()	spl1()	/* disallow softnet */
    107 #define splnet()        spl4()  /* disallow network */
    108 #define splbio()        spl3() 	/* disallow block I/O */
    109 #define splimp()        spl4()  /* disallow imput */
    110 #define spltty()        spl4()  /* disallow tty interrupts */
    111 #define splzs()         spl6()  /* disallow serial interrupts */
    112 #define splclock()      spl6()  /* disallow clock interrupt */
    113 #define splstatclock()  spl6()  /* disallow clock interrupt */
    114 #define splvm()         spl4()  /* disallow virtual memory operations */
    115 #define splhigh()       spl7()  /* disallow everything */
    116 #define splsched()      spl7()  /* disallow scheduling */
    117 
    118 /* watch out for side effects */
    119 #define splx(s)         (s & PSL_IPL ? _spl(s) : spl0())
    120 
    121 #ifdef _KERNEL
    122 #ifndef _LOCORE
    123 int	cpuspeed;
    124 #define	delay(n)	do { register int N = cpuspeed * (n); while (--N > 0); } while(0)
    125 #define DELAY(n)	delay(n)
    126 #endif
    127 #endif
    128 
    129 #ifdef COMPAT_HPUX
    130 /*
    131  * Constants/macros for HPUX multiple mapping of user address space.
    132  * Pages in the first 256Mb are mapped in at every 256Mb segment.
    133  */
    134 #define HPMMMASK	0xF0000000
    135 #define ISHPMMADDR(v) \
    136 	((curproc->p_md.md_flags & MDP_HPUXMMAP) && \
    137 	 ((unsigned)(v) & HPMMMASK) && \
    138 	 ((unsigned)(v) & HPMMMASK) != HPMMMASK)
    139 #define HPMMBASEADDR(v) \
    140 	((unsigned)(v) & ~HPMMMASK)
    141 #endif
    142 
    143 #endif	/* !_MACHINE_PARAM_H_ */
    144