sys/arch/mac68k/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.39 2009/08/26 00:30:02 thorpej Exp $     */
   2
   3 /*
   4  * Copyright (c) 1982, 1990 The Regents of the University of California.
   5  * 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 /*
  36  * Copyright (c) 1988 University of Utah.
  37  *
  38  * This code is derived from software contributed to Berkeley by
  39  * the Systems Programming Group of the University of Utah Computer
  40  * Science Department.
  41  *
  42  * Redistribution and use in source and binary forms, with or without
  43  * modification, are permitted provided that the following conditions
  44  * are met:
  45  * 1. Redistributions of source code must retain the above copyright
  46  *    notice, this list of conditions and the following disclaimer.
  47  * 2. Redistributions in binary form must reproduce the above copyright
  48  *    notice, this list of conditions and the following disclaimer in the
  49  *    documentation and/or other materials provided with the distribution.
  50  * 3. All advertising materials mentioning features or use of this software
  51  *    must display the following acknowledgement:
  52  *      This product includes software developed by the University of
  53  *      California, Berkeley and its contributors.
  54  * 4. Neither the name of the University nor the names of its contributors
  55  *    may be used to endorse or promote products derived from this software
  56  *    without specific prior written permission.
  57  *
  58  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  59  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  60  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  61  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  62  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  63  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  64  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  65  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  66  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  67  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  68  * SUCH DAMAGE.
  69  */
  70 /*-
  71  * Copyright (C) 1993   Allen K. Briggs, Chris P. Caputo,
  72  *                      Michael L. Finch, Bradley A. Grantham, and
  73  *                      Lawrence A. Kesteloot
  74  * All rights reserved.
  75  *
  76  * Redistribution and use in source and binary forms, with or without
  77  * modification, are permitted provided that the following conditions
  78  * are met:
  79  * 1. Redistributions of source code must retain the above copyright
  80  *    notice, this list of conditions and the following disclaimer.
  81  * 2. Redistributions in binary form must reproduce the above copyright
  82  *    notice, this list of conditions and the following disclaimer in the
  83  *    documentation and/or other materials provided with the distribution.
  84  * 3. All advertising materials mentioning features or use of this software
  85  *    must display the following acknowledgement:
  86  *      This product includes software developed by the Alice Group.
  87  * 4. The names of the Alice Group or any of its members may not be used
  88  *    to endorse or promote products derived from this software without
  89  *    specific prior written permission.
  90  *
  91  * THIS SOFTWARE IS PROVIDED BY THE ALICE GROUP ``AS IS'' AND ANY EXPRESS OR
  92  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  93  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  94  * IN NO EVENT SHALL THE ALICE GROUP BE LIABLE FOR ANY DIRECT, INDIRECT,
  95  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  96  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  97  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  98  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  99  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 100  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 101  *
 102  */
 103 /*
 104  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
 105  *
 106  *      @(#)vmparam.h   7.3 (Berkeley) 5/7/91
 107  */
 108
 109 #ifndef _MAC68K_VMPARAM_H_
 110 #define _MAC68K_VMPARAM_H_
 111
 112 /*
 113  * Machine dependent constants for mac68k -- mostly derived from hp300.
 114  */
 115
 116 /*
 117  * We use 4K pages on the mac68k.  Override the PAGE_* definitions
 118  * to be compile-time constants.
 119  */
 120 #define PAGE_SHIFT      PGSHIFT
 121 #define PAGE_SIZE       (1 << PAGE_SHIFT)
 122 #define PAGE_MASK       (PAGE_SIZE - 1)
 123
 124 /*
 125  * USRSTACK is the top (end) of the user stack.
 126  *
 127  * NOTE: HP300 uses HIGHPAGES == (0x100000/PAGE_SIZE) for HP/UX compatibility.
 128  * Do we care?  Obviously not at the moment.
 129  */
 130 #define USRSTACK        (-HIGHPAGES*PAGE_SIZE)  /* Start of user stack */
 131 #define BTOPUSRSTACK    (0x100000-HIGHPAGES)    /* btop(USRSTACK) */
 132 #define P1PAGES         0x100000
 133 #define HIGHPAGES       3                       /* UPAGES */
 134
 135 /*
 136  * Virtual memory related constants, all in bytes
 137  */
 138 #ifndef MAXTSIZ
 139 #define MAXTSIZ         (8*1024*1024)           /* max text size */
 140 #endif
 141 #ifndef DFLDSIZ
 142 #define DFLDSIZ         (32*1024*1024)          /* initial data size limit */
 143 #endif
 144 #ifndef MAXDSIZ
 145 #define MAXDSIZ         (64*1024*1024)          /* max data size */
 146 #endif
 147 #ifndef DFLSSIZ
 148 #define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
 149 #endif
 150 #ifndef MAXSSIZ
 151 #define MAXSSIZ         (32*1024*1024)          /* max stack size */
 152 #endif
 153
 154 /*
 155  * Sizes of the system and user portions of the system page table.
 156  */
 157 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
 158 #define SYSPTSIZE       (2 * NPTEPG)    /* 8mb */
 159 #define USRPTSIZE       (1 * NPTEPG)    /* 4mb */
 160
 161 /*
 162  * PTEs for mapping user space into the kernel for phyio operations.
 163  * One page is enough to handle 4Mb of simultaneous raw IO operations.
 164  */
 165 #ifndef USRIOSIZE
 166 #define USRIOSIZE       (1 * NPTEPG)    /* 4mb */
 167 #endif
 168
 169 /*
 170  * Mach derived constants
 171  */
 172
 173 /* user/kernel map constants */
 174 #define VM_MIN_ADDRESS          ((vaddr_t)0)
 175 #define VM_MAXUSER_ADDRESS      ((vaddr_t)(USRSTACK))
 176 #define VM_MAX_ADDRESS          ((vaddr_t)(0-(UPAGES*PAGE_SIZE)))
 177 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0)
 178 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)(0-PAGE_SIZE*NPTEPG))
 179
 180 /* virtual sizes (bytes) for various kernel submaps */
 181 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 182
 183 /* # of kernel PT pages (initial only, can grow dynamically) */
 184 #define VM_KERNEL_PT_PAGES      ((vsize_t)2)            /* XXX: SYSPTSIZE */
 185
 186 /*
 187  * Constants which control the way the VM system deals with memory segments.
 188  * Most mac68k systems have only 1 physical memory segment, but some have 2.
 189  *
 190  * On the systems that have multiple segments, specifically the IIsi and
 191  * IIci, the optimal configuration is to put the higher-density SIMMs in
 192  * bank B.  This is because the on-board video uses main memory in bank A
 193  * for the framebuffer, and a memory controller prevents access during
 194  * video refresh cycles.  Even if both banks contain the same amount of
 195  * RAM, a minimum of ~320KB will be subtracted from the amount in bank A
 196  * for the framebuffer (if on-board video is in use).
 197  */
 198 #define VM_PHYSSEG_MAX          2
 199 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BIGFIRST
 200 #define VM_PHYSSEG_NOADD
 201
 202 #define VM_NFREELIST            1
 203 #define VM_FREELIST_DEFAULT     0
 204
 205 #define __HAVE_PMAP_PHYSSEG
 206
 207 /*
 208  * pmap-specific data stored in the vm_physmem[] array.
 209  */
 210 struct pmap_physseg {
 211         struct pv_header *pvheader;     /* pv table for this seg */
 212 };
 213
 214 #endif /* _MAC68K_VMPARAM_H_ */