sys/arch/news68k/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.15 2009/08/26 00:30:03 thorpej Exp $     */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 1990, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This code is derived from software contributed to Berkeley by
   8  * the Systems Programming Group of the University of Utah Computer
   9  * Science Department.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  * 3. Neither the name of the University nor the names of its contributors
  20  *    may be used to endorse or promote products derived from this software
  21  *    without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  36  *
  37  *      @(#)vmparam.h   8.2 (Berkeley) 4/19/94
  38  */
  39 /*
  40  * Copyright (c) 1988 University of Utah.
  41  *
  42  * This code is derived from software contributed to Berkeley by
  43  * the Systems Programming Group of the University of Utah Computer
  44  * Science Department.
  45  *
  46  * Redistribution and use in source and binary forms, with or without
  47  * modification, are permitted provided that the following conditions
  48  * are met:
  49  * 1. Redistributions of source code must retain the above copyright
  50  *    notice, this list of conditions and the following disclaimer.
  51  * 2. Redistributions in binary form must reproduce the above copyright
  52  *    notice, this list of conditions and the following disclaimer in the
  53  *    documentation and/or other materials provided with the distribution.
  54  * 3. All advertising materials mentioning features or use of this software
  55  *    must display the following acknowledgement:
  56  *      This product includes software developed by the University of
  57  *      California, Berkeley and its contributors.
  58  * 4. Neither the name of the University nor the names of its contributors
  59  *    may be used to endorse or promote products derived from this software
  60  *    without specific prior written permission.
  61  *
  62  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  63  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  64  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  65  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  66  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  67  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  68  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  69  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  70  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  71  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  72  * SUCH DAMAGE.
  73  *
  74  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  75  *
  76  *      @(#)vmparam.h   8.2 (Berkeley) 4/19/94
  77  */
  78
  79 #ifndef _NEWS68K_VMPARAM_H_
  80 #define _NEWS68K_VMPARAM_H_
  81
  82 /*
  83  * Machine dependent constants for news68k
  84  */
  85
  86 /*
  87  * We use 4K pages on the news68k.  Override the PAGE_* definitions
  88  * to be compile time constants.
  89  */
  90 #define PAGE_SHIFT      PGSHIFT
  91 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  92 #define PAGE_MASK       (PAGE_SIZE - 1)
  93
  94 /*
  95  * USRSTACK is the top (end) of the user stack.
  96  *
  97  * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3)
  98  * is for HPUX compatibility.  Why??  Because HPUX's debuggers
  99  * have the user's stack hard-wired at FFF00000 for post-mortems,
 100  * and we must be compatible...
 101  */
 102 #define USRSTACK        (-HIGHPAGES*PAGE_SIZE)  /* Start of user stack */
 103 #define BTOPUSRSTACK    (0x100000-HIGHPAGES)    /* btop(USRSTACK) */
 104 #define P1PAGES         0x100000
 105 #define HIGHPAGES       (0x100000/PAGE_SIZE)
 106
 107 /*
 108  * Virtual memory related constants, all in bytes
 109  */
 110 #ifndef MAXTSIZ
 111 #define MAXTSIZ         (8*1024*1024)           /* max text size */
 112 #endif
 113 #ifndef DFLDSIZ
 114 #define DFLDSIZ         (16*1024*1024)          /* initial data size limit */
 115 #endif
 116 #ifndef MAXDSIZ
 117 #define MAXDSIZ         (64*1024*1024)          /* max data size */
 118 #endif
 119 #ifndef DFLSSIZ
 120 #define DFLSSIZ         (512*1024)              /* initial stack size limit */
 121 #endif
 122 #ifndef MAXSSIZ
 123 #define MAXSSIZ         MAXDSIZ                 /* max stack size */
 124 #endif
 125
 126 /*
 127  * Sizes of the system and user portions of the system page table.
 128  */
 129 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
 130 #define SYSPTSIZE       (2 * NPTEPG)    /* 8mb */
 131 #define USRPTSIZE       (1 * NPTEPG)    /* 4mb */
 132
 133 /*
 134  * PTEs for mapping user space into the kernel for phyio operations.
 135  * One page is enough to handle 4Mb of simultaneous raw IO operations.
 136  */
 137 #ifndef USRIOSIZE
 138 #define USRIOSIZE       (1 * NPTEPG)    /* 4mb */
 139 #endif
 140
 141 /*
 142  * Mach derived constants
 143  */
 144
 145 /* user/kernel map constants */
 146 #define VM_MIN_ADDRESS          ((vaddr_t)0)
 147 #define VM_MAXUSER_ADDRESS      ((vaddr_t)0xFFF00000)
 148 #define VM_MAX_ADDRESS          ((vaddr_t)0xFFF00000)
 149 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0)
 150 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)(0-PAGE_SIZE*NPTEPG))
 151
 152 /* virtual sizes (bytes) for various kernel submaps */
 153 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 154
 155 /* # of kernel PT pages (initial only, can grow dynamically) */
 156 #define VM_KERNEL_PT_PAGES      ((vsize_t)2)            /* XXX: SYSPTSIZE */
 157
 158 /*
 159  * Constants which control the way the VM system deals with memory segments.
 160  * The news68k only has one physical memory segment?
 161  */
 162 #define VM_PHYSSEG_MAX          1
 163 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
 164 #define VM_PHYSSEG_NOADD
 165
 166 #define VM_NFREELIST            1
 167 #define VM_FREELIST_DEFAULT     0
 168
 169 #define __HAVE_PMAP_PHYSSEG
 170
 171 /*
 172  * pmap-specific data stored in the vm_physmem[] array.
 173  */
 174 struct pmap_physseg {
 175         struct pv_header *pvheader;     /* pv table for this seg */
 176 };
 177
 178 #endif /* _NEWS68K_VMPARAM_H_ */