sys/arch/atari/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.25 2009/08/26 00:30:02 thorpej Exp $     */
   2
   3 /*
   4  * Copyright (c) 1982, 1986, 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  * from: Utah $Hdr: vmparam.h 1.16 91/01/18$
  36  *
  37  *      @(#)vmparam.h   7.3 (Berkeley) 5/7/91
  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   7.3 (Berkeley) 5/7/91
  77  */
  78
  79 #ifndef _MACHINE_VMPARAM_H_
  80 #define _MACHINE_VMPARAM_H_
  81
  82 #include <machine/pte.h>
  83
  84 /*
  85  * Machine dependent constants for atari
  86  */
  87
  88 /*
  89  * We use 8K pages on the Atari.  Override the PAGE_* definitions
  90  * to be compile-time constants.
  91  */
  92 #define PAGE_SHIFT      PGSHIFT
  93 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  94 #define PAGE_MASK       (PAGE_SIZE - 1)
  95
  96 /*
  97  * USRSTACK is the top (end) of the user stack.
  98  *
  99  * These are a mixture of i386, sun3 and hp settings..
 100  */
 101
 102 /* Sun settings. Still hope, that I might get sun3 binaries to work... */
 103 #define USRSTACK        0x0E000000
 104 #define KUSER_AREA      (-UPAGES*PAGE_SIZE)
 105 /*
 106  * Virtual memory related constants, all in bytes
 107  */
 108
 109 #ifndef MAXTSIZ
 110 #define MAXTSIZ         (6*1024*1024)           /* max text size */
 111 #endif
 112 #ifndef DFLDSIZ
 113 #define DFLDSIZ         (32*1024*1024)          /* initial data size limit */
 114 #endif
 115 #ifndef MAXDSIZ
 116 #define MAXDSIZ         (64*1024*1024)          /* max data size */
 117 #endif
 118 #ifndef DFLSSIZ
 119 #define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
 120 #endif
 121 #ifndef MAXSSIZ
 122 #define MAXSSIZ         (32*1024*1024)          /* max stack size */
 123 #endif
 124
 125 /*
 126  * Sizes of the system and user portions of the system page table.
 127  */
 128 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */
 129 #define SYSPTSIZE       (2 * NPTEPG)    /* 16mb */
 130 #define USRPTSIZE       (1 * NPTEPG)    /* 16mb */
 131
 132 /*
 133  * PTEs for mapping user space into the kernel for phyio operations.
 134  * One page is enough to handle 16Mb of simultaneous raw IO operations.
 135  */
 136 #ifndef USRIOSIZE
 137 #define USRIOSIZE       (1 * NPTEPG)    /* 16mb */
 138 #endif
 139
 140 /*
 141  * user/kernel map constants
 142  */
 143 #define VM_MIN_ADDRESS          ((vaddr_t)0)
 144 #define VM_MAX_ADDRESS          ((vaddr_t)(USRSTACK))
 145 #define VM_MAXUSER_ADDRESS      ((vaddr_t)(VM_MAX_ADDRESS))
 146 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0)
 147 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)-(NPTEPG * PAGE_SIZE))
 148
 149 /*
 150  * virtual sizes (bytes) for various kernel submaps
 151  */
 152 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 153
 154 /*
 155  * Our bootloader currently passes up to 2 segments (ST and TT ram).
 156  */
 157 #define VM_PHYSSEG_MAX          (2)
 158 #define VM_PHYSSEG_STRAT        VM_PSTRAT_RANDOM
 159 #define VM_PHYSSEG_NOADD
 160
 161 #define VM_NFREELIST            2
 162 #define VM_FREELIST_DEFAULT     0
 163 #define VM_FREELIST_TTRAM       VM_FREELIST_DEFAULT
 164 #define VM_FREELIST_STRAM       1
 165
 166 #define __HAVE_PMAP_PHYSSEG
 167
 168 /*
 169  * pmap-specific data stored in the vm_physmem[] array.
 170  */
 171 struct pmap_physseg {
 172         struct pv_header *pvheader;     /* pv table for this seg */
 173 };
 174
 175
 176 /*
 177  * number of kernel PT pages (initial only, can grow dynamically)
 178  */
 179 #define VM_KERNEL_PT_PAGES      ((vsize_t)4)            /* XXX: SYSPTSIZE */
 180 #endif /* !_MACHINE_VMPARAM_H_ */