sys/arch/hppa/include/param.h

   1 /*      $NetBSD: param.h,v 1.12.18.1 2009/02/19 18:23:35 skrll Exp $    */
   2
   3 /*      $OpenBSD: param.h,v 1.12 2001/07/06 02:07:41 provos Exp $       */
   4
   5 /*
   6  * Copyright (c) 1988-1994, The University of Utah and
   7  * the Computer Systems Laboratory at the University of Utah (CSL).
   8  * All rights reserved.
   9  *
  10  * Permission to use, copy, modify and distribute this software is hereby
  11  * granted provided that (1) source code retains these copyright, permission,
  12  * and disclaimer notices, and (2) redistributions including binaries
  13  * reproduce the notices in supporting documentation, and (3) all advertising
  14  * materials mentioning features or use of this software display the following
  15  * acknowledgement: ``This product includes software developed by the
  16  * Computer Systems Laboratory at the University of Utah.''
  17  *
  18  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  19  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  20  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  21  *
  22  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  23  * improvements that they make and grant CSL redistribution rights.
  24  *
  25  *      Utah $Hdr: param.h 1.18 94/12/16$
  26  */
  27
  28 #include <sys/featuretest.h>
  29
  30 #if defined(_NETBSD_SOURCE)
  31 #include <machine/cpu.h>
  32 #endif
  33
  34 /*
  35  * Machine dependent constants for PA-RISC.
  36  */
  37
  38 #define _MACHINE_ARCH   hppa
  39 #define MACHINE_ARCH    "hppa"
  40 #define MID_MACHINE     MID_HPPA
  41
  42 /*
  43  * Round p (pointer or byte index) up to a correctly-aligned value for all
  44  * data types (int, long, ...).   The result is u_int and must be cast to
  45  * any desired pointer type.
  46  */
  47 #define ALIGNBYTES      7
  48 #define ALIGN(p)        (((u_long)(p) + ALIGNBYTES) &~ ALIGNBYTES)
  49 #define ALIGNED_POINTER(p,t) ((((u_long)(p)) & (sizeof(t) - 1)) == 0)
  50
  51 #define PGSHIFT         12              /* LOG2(NBPG) */
  52 #define NBPG            (1 << PGSHIFT)  /* bytes/page */
  53 #define PGOFSET         (NBPG-1)        /* byte offset into page */
  54
  55 #define SEGSHIFT        (PGSHIFT + (PGSHIFT-PTESHIFT))  /* LOG2(NBSEG) */
  56 #define NBSEG           (1 << SEGSHIFT) /* bytes/segment (quadrant) */
  57 #define SEGOFSET        (NBSEG-1)       /* byte offset into segment */
  58
  59 #define KERNBASE        0x00000000      /* start of kernel virtual */
  60 #define BTOPKERNBASE    ((u_long)KERNBASE >> PGSHIFT)
  61
  62 #define DEV_BSIZE       512
  63 #define DEV_BSHIFT      9               /* log2(DEV_BSIZE) */
  64 #define BLKDEV_IOSIZE   2048
  65 #define MAXPHYS         (64 * 1024)     /* max raw I/O transfer size */
  66
  67 #define SSIZE           (1)             /* initial stack size/NBPG */
  68 #define SINCR           (1)             /* increment of stack/NBPG */
  69
  70 #ifdef DIAGNOSTIC
  71 #define UPAGES          5               /* pages of u-area + redzone */
  72 #else
  73 #define UPAGES          4               /* pages of u-area */
  74 #endif
  75 #define USPACE          (UPAGES * NBPG) /* pages for user struct and kstack */
  76
  77 #ifndef MSGBUFSIZE
  78 #define MSGBUFSIZE      2*NBPG          /* default message buffer size */
  79 #endif
  80
  81 /*
  82  * Constants related to network buffer management.
  83  * MCLBYTES must be no larger than the software page size, and,
  84  * on machines that exchange pages of input or output buffers with mbuf
  85  * clusters (MAPPED_MBUFS), MCLBYTES must also be an integral multiple
  86  * of the hardware page size.
  87  */
  88 #define MSIZE           256             /* size of an mbuf */
  89 #define MCLSHIFT        11
  90 #define MCLBYTES        (1 << MCLSHIFT) /* large enough for ether MTU */
  91 #define MCLOFSET        (MCLBYTES - 1)
  92 #ifndef NMBCLUSTERS
  93 #define NMBCLUSTERS     (2048)          /* cl map size: 1MB */
  94 #endif
  95
  96 /*
  97  * Size of kernel malloc arena in logical pages
  98  */
  99 #define NKMEMPAGES_MIN_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
 100 #define NKMEMPAGES_MAX_DEFAULT  ((16 * 1024 * 1024) >> PAGE_SHIFT)
 101
 102 /*
 103  * Mach derived conversion macros
 104  */
 105
 106 #define btop(x)         ((unsigned long)(x) >> PGSHIFT)
 107 #define ptob(x)         ((unsigned long)(x) << PGSHIFT)