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param3.h revision 1.18
      1 /*
      2  * Copyright (c) 1994 Gordon W. Ross
      3  * Copyright (c) 1993 Adam Glass
      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  *	from: @(#)param.h	8.1 (Berkeley) 6/10/93
     42  *	$Id: param3.h,v 1.18 1994/09/20 16:31:03 gwr Exp $
     43  */
     44 
     45 #ifndef	MACHINE
     46 
     47 /*
     48  * Machine dependent constants for the Sun3 series.
     49  */
     50 #define	MACHINE     "sun3"
     51 #define	MACHINE_ARCH	"m68k"
     52 #define MID_MACHINE MID_M68K
     53 
     54 /*
     55  * Round p (pointer or byte index) up to a correctly-aligned value
     56  * for all data types (int, long, ...).   The result is u_int and
     57  * must be cast to any desired pointer type.
     58  */
     59 #define	ALIGNBYTES	3
     60 #define	ALIGN(p)	(((u_int)(p) + ALIGNBYTES) &~ ALIGNBYTES)
     61 
     62 #define	NBPG		8192		/* bytes/page */
     63 #define	PGOFSET		(NBPG-1)	/* byte offset into page */
     64 #define	PGSHIFT		13		/* LOG2(NBPG) */
     65 
     66 #define NBSG		0x20000	/* bytes/segment */
     67 #define	SEGOFSET	(NBSG-1)	/* byte offset into segment */
     68 #define SEGSHIFT	17	        /* LOG2(NBSG) */
     69 
     70 #define	KERNBASE	0x0E000000	/* start of kernel virtual */
     71 #define	BTOPKERNBASE	((u_long)KERNBASE >> PGSHIFT)
     72 
     73 #define	DEV_BSIZE	512
     74 #define	DEV_BSHIFT	9		/* log2(DEV_BSIZE) */
     75 #define BLKDEV_IOSIZE	2048
     76 #define	MAXPHYS		(64 * 1024)	/* max raw I/O transfer size */
     77 
     78 #define	CLSIZE		1
     79 #define	CLSIZELOG2	0
     80 
     81 /* NOTE: SSIZE, SINCR and UPAGES must be multiples of CLSIZE */
     82 #define	SSIZE		1		/* initial stack size/NBPG */
     83 #define	SINCR		1		/* increment of stack/NBPG */
     84 
     85 #define	UPAGES		3		/* pages of u-area */
     86 
     87 /*
     88  * Constants related to network buffer management.
     89  * MCLBYTES must be no larger than CLBYTES (the software page size), and,
     90  * on machines that exchange pages of input or output buffers with mbuf
     91  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
     92  * of the hardware page size.
     93  */
     94 #define	MSIZE		128		/* size of an mbuf */
     95 #define	MCLBYTES	2048		/* large enough for ether MTU */
     96 #define	MCLSHIFT	11
     97 #define	MCLOFSET	(MCLBYTES - 1)
     98 #ifndef NMBCLUSTERS
     99 #ifdef GATEWAY
    100 #define	NMBCLUSTERS	512		/* map size, max cluster allocation */
    101 #else
    102 #define	NMBCLUSTERS	256		/* map size, max cluster allocation */
    103 #endif
    104 #endif
    105 
    106 /*
    107  * Size of kernel malloc arena in CLBYTES-sized logical pages
    108  */
    109 #ifndef NKMEMCLUSTERS
    110 #define	NKMEMCLUSTERS	(2048*1024/CLBYTES)
    111 #endif
    112 
    113 /* pages ("clicks") (4096 bytes) to disk blocks */
    114 #define	ctod(x)	((x)<<(PGSHIFT-DEV_BSHIFT))
    115 #define	dtoc(x)	((x)>>(PGSHIFT-DEV_BSHIFT))
    116 #define	dtob(x)	((x)<<DEV_BSHIFT)
    117 
    118 /* pages to bytes */
    119 #define	ctob(x)	((x)<<PGSHIFT)
    120 
    121 /* bytes to pages */
    122 #define	btoc(x)	(((unsigned)(x)+(NBPG-1))>>PGSHIFT)
    123 
    124 #define	btodb(bytes)	 		/* calculates (bytes / DEV_BSIZE) */ \
    125 	((unsigned)(bytes) >> DEV_BSHIFT)
    126 #define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
    127 	((unsigned)(db) << DEV_BSHIFT)
    128 
    129 /*
    130  * Map a ``block device block'' to a file system block.
    131  * This should be device dependent, and should use the bsize
    132  * field from the disk label.
    133  * For now though just use DEV_BSIZE.
    134  */
    135 #define	bdbtofsb(bn)	((bn) / (BLKDEV_IOSIZE/DEV_BSIZE))
    136 
    137 /*
    138  * Mach derived conversion macros
    139  */
    140 #define sun3_round_seg(x)	((((unsigned)(x)) + NBSG - 1) & ~(NBSG-1))
    141 #define sun3_trunc_seg(x)	((unsigned)(x) & ~(NBSG-1))
    142 #define sun3_round_up_seg(x)	(sun3_trunc_seg(x) + NBSG)
    143 #define sun3_btos(x)		((unsigned)(x) >> SEGSHIFT)
    144 #define sun3_stob(x)		((unsigned)(x) << SEGSHIFT)
    145 
    146 #define sun3_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
    147 #define sun3_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
    148 #define sun3_round_up_page(x)	(sun3_round_page(x) + NBPG)
    149 #define sun3_btop(x)		((unsigned)(x) >> PGSHIFT)
    150 #define sun3_ptob(x)		((unsigned)(x) << PGSHIFT)
    151 
    152 /*
    153  * Suns have a REAL interrupt register, so spl0() and splx(s)
    154  * have no need to check for any simulated interrupts, etc.
    155  * All are done in-line (if optimization turned on).
    156  */
    157 #include <machine/psl.h>
    158 
    159 #ifdef __GNUC__
    160 /*
    161  * This is as close to a macro as one can get.
    162  * (See the GCC extensions info document.)
    163  */
    164 extern __inline__ int _spl(int new)
    165 {
    166 	register int old;
    167 	__asm__ __volatile ("clrl %0; movw sr,%0; movw %1,sr" :
    168 						"&=d" (old) : "di" (new));
    169 	return (old);
    170 }
    171 #endif	/* GNUC */
    172 
    173 #define spl0()  _spl(PSL_S|PSL_IPL0)
    174 #define spl1()  _spl(PSL_S|PSL_IPL1)
    175 #define spl2()  _spl(PSL_S|PSL_IPL2)
    176 #define spl3()  _spl(PSL_S|PSL_IPL3)
    177 #define spl4()  _spl(PSL_S|PSL_IPL4)
    178 #define spl5()  _spl(PSL_S|PSL_IPL5)
    179 #define spl6()  _spl(PSL_S|PSL_IPL6)
    180 #define spl7()  _spl(PSL_S|PSL_IPL7)
    181 #define splx(x)	_spl(x)
    182 
    183 #define splsoftclock()  spl1()
    184 #define splnet()        spl3()
    185 #define splbio()        spl2()
    186 #define splimp()        spl3()
    187 #define spltty()        spl2()
    188 #define splzs()         spl6()
    189 #define splclock()      spl5()
    190 #define splstatclock()  splclock()
    191 #define splvm()         splimp()
    192 #define splhigh()       spl7()
    193 #define splsched()      spl7()
    194 
    195 #ifdef KERNEL
    196 #ifndef LOCORE
    197 #define	DELAY(n)	delay(n)
    198 #endif
    199 
    200 #else
    201 #define	DELAY(n)	{ register int N = (n); while (--N > 0); }
    202 #endif
    203 
    204 #endif	/* MACHINE */
    205