text: /*
   * Copyright (c) 1988 University of Utah.
   * Copyright (c) 1992, 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 and Ralph Campbell.
   *
   * %sccs.include.redist.c%
   *
   * from: Utah $Hdr: machparam.h 1.11 89/08/14$
   *
   *	@(#)param.h	8.3 (Berkeley) 05/14/95
   */
  
  /*
   * Machine dependent constants for DEC Station 3100.
   */
  #define	MACHINE	"news3400"
  #define NCPUS 1
  #define COFF
  
  /*
   * 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	7
  #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/4)
  
  #define NBSEG		0x400000	/* bytes/segment */
  #define	SEGOFSET	(NBSEG-1)	/* byte offset into segment */
  #define	SEGSHIFT	22		/* LOG2(NBSEG) */
  
  #define	KERNBASE	0x80000000	/* 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		(128 * 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	UADDR		0xffffd000	/* address of u */
  #define	UVPN		(UADDR>>PGSHIFT)/* virtual page number of u */
  #define	KERNELSTACK	(UADDR+UPAGES*NBPG)	/* top of kernel stack */
  
  /*
   * 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) */ \
  	((bytes) >> DEV_BSHIFT)
  #define	dbtob(db)			/* calculates (db * DEV_BSIZE) */ \
  	((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 pmax_round_page(x)	((((unsigned)(x)) + NBPG - 1) & ~(NBPG-1))
  #define pmax_trunc_page(x)	((unsigned)(x) & ~(NBPG-1))
  #define pmax_btop(x)		((unsigned)(x) >> PGSHIFT)
  #define pmax_ptob(x)		((unsigned)(x) << PGSHIFT)
  
  #ifdef news3400
  #define	splnet		spl2
  #define	splsoftclock	spl2
  #define	splbio		spl3
  #define	spltty		spl4
  #define	splimp		spl4
  #define	splclock	spl5
  #define	splstatclock	spl5
  #endif /* news3400 */
  
  #ifdef KERNEL
  #ifndef LOCORE
  extern	int cpuspeed;
  #define	DELAY(n)	{ register int N = cpuspeed * (n) / 2; while (--N > 0); }
  #endif
  #else /* !KERNEL */
  #define	DELAY(n)	{ register int N = (n); while (--N > 0); }
  #endif /* !KERNEL */
  
  #ifndef LOCORE
  extern int	intrcnt[];
  extern char	*intrnames[];
  #endif /* !LOCORE */
  
  #define	INTR_CLOCK	0
  #define	INTR_SOFTCLK	1
  #define	INTR_SOFTINT	2
  #define	INTR_AST	3
  #define	INTR_SCSI00	4
  #define	INTR_SCSI01	5
  #define	INTR_SCSI02	6
  #define	INTR_SCSI03	7
  #define	INTR_SCSI04	8
  #define	INTR_SCSI05	9
  #define	INTR_SCSI06	10
  #define	INTR_SCSI07	11
  #define	INTR_SCSI10	12
  #define	INTR_SCSI11	13
  #define	INTR_SCSI12	14
  #define	INTR_SCSI13	15
  #define	INTR_SCSI14	16
  #define	INTR_SCSI15	17
  #define	INTR_SCSI16	18
  #define	INTR_SCSI17	19
  #define	INTR_ETHER0	20
  #define	INTR_ETHER1	21
  #define	INTR_ETHER2	22
  #define	INTR_VME2	23
  #define	INTR_VME4	24
  #define	INTR_RS0	25
  #define	INTR_RS1	26
  #define	INTR_RS2	27
  #define	INTR_RS3	28
  #define	INTR_RS4	29
  #define	INTR_RS5	30
  #define	INTR_RS6	31
  #define	INTR_RS7	32
  #define	INTR_RS8	33
  #define	INTR_RS9	34
  #define	INTR_RS10	35
  #define	INTR_RS11	36
  #define	INTR_PRINTER	37
  #define	INTR_FD		38
  #define	INTR_AUDIO	39
  #define	INTR_KEYBOARD	40
  #define	INTR_MOUSE	41
  #define	INTR_BITMAP	42
  #define	INTR_FDDI	43
  #define INTR_RENDER	44
  
  #define	NINTRSLOT	45		/* # of intrcnt[] slot */
  
  #ifndef _SIMPLELOCK_H_
  #define _SIMPLELOCK_H_
  /*
   * A simple spin lock.
   *
   * This structure only sets one bit of data, but is sized based on the
   * minimum word size that can be operated on by the hardware test-and-set
   * instruction. It is only needed for multiprocessors, as uniprocessors
   * will always run to completion or a sleep. It is an error to hold one
   * of these locks while a process is sleeping.
   */
  struct simplelock {
  	int	lock_data;
  };
  
  #if !defined(DEBUG) && NCPUS > 1
  /*
   * The simple-lock routines are the primitives out of which the lock
   * package is built. The machine-dependent code must implement an
   * atomic test_and_set operation that indivisibly sets the simple lock
   * to non-zero and returns its old value. It also assumes that the
   * setting of the lock to zero below is indivisible. Simple locks may
   * only be used for exclusive locks.
   */
  static __inline void
  simple_lock_init(lkp)
  	struct simplelock *lkp;
  {
  
  	lkp->lock_data = 0;
  }
  
  static __inline void
  simple_lock(lkp)
  	__volatile struct simplelock *lkp;
  {
  
  	while (test_and_set(&lkp->lock_data))
  		continue;
  }
  
  static __inline int
  simple_lock_try(lkp)
  	__volatile struct simplelock *lkp;
  {
  
  	return (!test_and_set(&lkp->lock_data))
  }
  
  static __inline void
  simple_unlock(lkp)
  	__volatile struct simplelock *lkp;
  {
  
  	lkp->lock_data = 0;
  }
  #endif /* NCPUS > 1 */
  #endif /* !_SIMPLELOCK_H_ */
  