usr/src/sys/luna68k/include/param.h

/*
 * Copyright (c) 1988 University of Utah.
 * Copyright (c) 1992 OMRON Corporation.
 * Copyright (c) 1982, 1986, 1990, 1992 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.
 *
 * %sccs.include.redist.c%
 *
 * from: Utah $Hdr: machparam.h 1.11 89/08/14$
 * OMRON: $Id: param.h,v 1.3 92/06/14 06:28:28 moti Exp $
 *
 * from: hp300/include/param.h  7.8 (Berkeley) 6/28/91
 *
 *      @(#)param.h     7.1 (Berkeley) %G%
 */

/*
 * Machine dependent constants for LUNA taken from:
 * Param.h for HP9000 series 300.
 */
#define MACHINE "luna68k"

/*
 * 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            4096            /* bytes/page */
#define PGOFSET         (NBPG-1)        /* byte offset into page */
#define PGSHIFT         12              /* LOG2(NBPG) */
#define NPTEPG          (NBPG/(sizeof (struct pte)))

#define NBSEG           0x400000        /* bytes/segment */
#define SEGOFSET        (NBSEG-1)       /* byte offset into segment */
#define SEGSHIFT        22              /* LOG2(NBSEG) */

#define KERNBASE        0x00000000      /* start of kernel virtual */
#define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)

#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          3               /* pages of u-area */

/*
 * 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 MCLBYTES        1024
#define MCLSHIFT        10
#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") (4096 bytes) to disk blocks */
#define ctod(x) ((x)<<(PGSHIFT-DEV_BSHIFT))
#define dtoc(x) ((x)>>(PGSHIFT-DEV_BSHIFT))
#define dtob(x) ((x)<<DEV_BSHIFT)

/* pages to bytes */
#define ctob(x) ((x)<<PGSHIFT)

/* bytes to pages */
#define btoc(x) (((unsigned)(x)+(NBPG-1))>>PGSHIFT)

#define btodb(bytes)                    /* calculates (bytes / DEV_BSIZE) */ \
        ((unsigned)(bytes) >> DEV_BSHIFT)
#define dbtob(db)                       /* calculates (db * DEV_BSIZE) */ \
        ((unsigned)(db) << 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 luna_round_page(x)      ((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
#define luna_trunc_page(x)      ((unsigned)(x) & ~(NBPG-1))
#define luna_btop(x)            ((unsigned)(x) >> PGSHIFT)
#define luna_ptob(x)            ((unsigned)(x) << PGSHIFT)

/*
 * spl functions; all but spl0 are done in-line
 */
#include <machine/psl.h>

#define _spl(s) \
({ \
        register int _spl_r; \
\
        asm __volatile ("clrl %0; movew sr,%0; movew %1,sr" : \
                "&=d" (_spl_r) : "di" (s)); \
        _spl_r; \
})

/* spl0 requires checking for software interrupts */
#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 splsoftclock()  spl1()
#define splnet()        spl1()
#define splbio()        spl5()
#define splimp()        spl5()
#define spltty()        spl6()
#define splclock()      spl5()
#define splvm()         spl6()
#define splhigh()       spl7()
#define splsched()      spl7()

/* watch out for side effects */
#define splx(s)         (s & PSL_IPL ? _spl(s) : spl0())

#ifdef KERNEL
#ifndef LOCORE
int     cpuspeed;
#define DELAY(n)        { register int N = cpuspeed * (n); while (--N > 0); }
#endif

#else
#define DELAY(n)        { register int N = (n); while (--N > 0); }
#endif