sys/arch/next68k/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.20 2009/08/26 00:30:03 thorpej Exp $     */
   2
   3 /*
   4  * This file was taken from from mvme68k/include/vmparam.h and
   5  * should probably be re-synced when needed.
   6  * Darrin B Jewell <jewell@mit.edu>  Fri Aug 28 03:22:07 1998
   7  * original cvs id: NetBSD: vmparam.h,v 1.9 1998/08/22 10:55:34 scw Exp
   8  */
   9
  10 /*
  11  * Copyright (c) 1982, 1986, 1990, 1993
  12  *      The Regents of the University of California.  All rights reserved.
  13  *
  14  * This code is derived from software contributed to Berkeley by
  15  * the Systems Programming Group of the University of Utah Computer
  16  * Science Department.
  17  *
  18  * Redistribution and use in source and binary forms, with or without
  19  * modification, are permitted provided that the following conditions
  20  * are met:
  21  * 1. Redistributions of source code must retain the above copyright
  22  *    notice, this list of conditions and the following disclaimer.
  23  * 2. Redistributions in binary form must reproduce the above copyright
  24  *    notice, this list of conditions and the following disclaimer in the
  25  *    documentation and/or other materials provided with the distribution.
  26  * 3. Neither the name of the University nor the names of its contributors
  27  *    may be used to endorse or promote products derived from this software
  28  *    without specific prior written permission.
  29  *
  30  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  31  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  32  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  33  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  34  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  35  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  36  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  37  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  38  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  39  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  40  * SUCH DAMAGE.
  41  *
  42  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  43  *
  44  *      @(#)vmparam.h   8.2 (Berkeley) 4/19/94
  45  */
  46 /*
  47  * Copyright (c) 1988 University of Utah.
  48  *
  49  * This code is derived from software contributed to Berkeley by
  50  * the Systems Programming Group of the University of Utah Computer
  51  * Science Department.
  52  *
  53  * Redistribution and use in source and binary forms, with or without
  54  * modification, are permitted provided that the following conditions
  55  * are met:
  56  * 1. Redistributions of source code must retain the above copyright
  57  *    notice, this list of conditions and the following disclaimer.
  58  * 2. Redistributions in binary form must reproduce the above copyright
  59  *    notice, this list of conditions and the following disclaimer in the
  60  *    documentation and/or other materials provided with the distribution.
  61  * 3. All advertising materials mentioning features or use of this software
  62  *    must display the following acknowledgement:
  63  *      This product includes software developed by the University of
  64  *      California, Berkeley and its contributors.
  65  * 4. Neither the name of the University nor the names of its contributors
  66  *    may be used to endorse or promote products derived from this software
  67  *    without specific prior written permission.
  68  *
  69  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  70  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  71  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  72  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  73  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  74  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  75  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  76  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  77  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  78  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  79  * SUCH DAMAGE.
  80  *
  81  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  82  *
  83  *      @(#)vmparam.h   8.2 (Berkeley) 4/19/94
  84  */
  85
  86 #ifndef _NEXT68K_VMPARAM_H_
  87 #define _NEXT68K_VMPARAM_H_
  88
  89 /*
  90  * Machine dependent constants for NEXT68K
  91  */
  92
  93 /*
  94  * We use 4K pages on the NeXT.  Override the PAGE_* definitions
  95  * to be compile-time constants.
  96  */
  97 #define PAGE_SHIFT      PGSHIFT
  98 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  99 #define PAGE_MASK       (PAGE_SIZE - 1)
 100
 101 /*
 102  * USRSTACK is the top (end) of the user stack.
 103  *
 104  * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
 105  * is for HPUX compatibility.  Why??  Because HPUX's debuggers
 106  * have the user's stack hard-wired at FFF00000 for post-mortems,
 107  * and we must be compatible...
 108  */
 109 #define USRSTACK        (-HIGHPAGES*PAGE_SIZE)  /* Start of user stack */
 110 #define BTOPUSRSTACK    (0x100000-HIGHPAGES)    /* btop(USRSTACK) */
 111 #define P1PAGES         0x100000
 112 #define HIGHPAGES       (0x100000/PAGE_SIZE)
 113
 114 /*
 115  * Virtual memory related constants, all in bytes
 116  */
 117 #ifndef MAXTSIZ
 118 #define MAXTSIZ         (8*1024*1024)           /* max text size */
 119 #endif
 120 #ifndef DFLDSIZ
 121 #define DFLDSIZ         (16*1024*1024)          /* initial data size limit */
 122 #endif
 123 #ifndef MAXDSIZ
 124 #define MAXDSIZ         (64*1024*1024)          /* max data size */
 125 #endif
 126 #ifndef DFLSSIZ
 127 #define DFLSSIZ         (512*1024)              /* initial stack size limit */
 128 #endif
 129 #ifndef MAXSSIZ
 130 #define MAXSSIZ         MAXDSIZ                 /* max stack size */
 131 #endif
 132
 133 /*
 134  * Sizes of the system and user portions of the system page table.
 135  */
 136 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
 137 #define SYSPTSIZE       (2 * NPTEPG)    /* 8mb */
 138 #define USRPTSIZE       (1 * NPTEPG)    /* 4mb */
 139
 140 /*
 141  * PTEs for mapping user space into the kernel for phyio operations.
 142  * One page is enough to handle 4Mb of simultaneous raw IO operations.
 143  */
 144 #ifndef USRIOSIZE
 145 #define USRIOSIZE       (1 * NPTEPG)    /* 4mb */
 146 #endif
 147
 148 /*
 149  * Mach derived constants
 150  */
 151
 152 /* user/kernel map constants */
 153 #define VM_MIN_ADDRESS          ((vaddr_t)0)
 154 #define VM_MAXUSER_ADDRESS      ((vaddr_t)0xFFF00000)
 155 #define VM_MAX_ADDRESS          ((vaddr_t)0xFFF00000)
 156 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0)
 157 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)(0-PAGE_SIZE*NPTEPG*2))
 158
 159 /* virtual sizes (bytes) for various kernel submaps */
 160 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 161
 162 /* # of kernel PT pages (initial only, can grow dynamically) */
 163 #define VM_KERNEL_PT_PAGES      ((vsize_t)2)            /* XXX: SYSPTSIZE */
 164
 165 /*
 166  * Constants which control the way the VM system deals with memory segments.
 167  */
 168 #define VM_PHYSSEG_MAX          5                       /* @@@ should really come from N_SIMM */
 169 #define VM_PHYSSEG_STRAT        VM_PSTRAT_RANDOM
 170 #define VM_PHYSSEG_NOADD                                /* @@@ does the NeXT really need this? */
 171 #define VM_NFREELIST            1
 172 #define VM_FREELIST_DEFAULT     0
 173
 174 #define __HAVE_PMAP_PHYSSEG
 175
 176 /*
 177  * pmap-specific data stored in the vm_physmem[] array.
 178  */
 179 struct pmap_physseg {
 180         struct pv_header *pvheader;     /* pv table for this seg */
 181 };
 182
 183 #endif /* _MVME68K_VMPARAM_H_ */