sys/arch/amiga/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.38 2009/08/26 00:30:01 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 #ifndef _MACHINE_VMPARAM_H_
  79 #define _MACHINE_VMPARAM_H_
  80
  81 #include <machine/pte.h>
  82
  83 /*
  84  * Machine dependent constants for amiga
  85  */
  86
  87 /*
  88  * We use 8K pages on the Amiga.  Override the PAGE_* definitions
  89  * to be compie-time constants.
  90  */
  91 #define PAGE_SHIFT      PGSHIFT
  92 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  93 #define PAGE_MASK       (PAGE_SIZE - 1)
  94
  95 /*
  96  * USRSTACK is the top (end) of the user stack.
  97  *
  98  * These are a mixture of i386, sun3 and hp settings..
  99  */
 100
 101 /* Sun settings. Still hope, that I might get sun3 binaries to work... */
 102 #ifndef USRSTACK
 103 #define USRSTACK        0x0E000000
 104 #endif
 105 #define KUSER_AREA      (-UPAGES*PAGE_SIZE)
 106 /*
 107  * Virtual memory related constants, all in bytes
 108  */
 109
 110 #ifndef MAXTSIZ
 111 #define MAXTSIZ         (6*1024*1024)           /* max text size */
 112 #endif
 113 #ifndef DFLDSIZ
 114 #define DFLDSIZ         (32*1024*1024)          /* initial data size limit */
 115 #endif
 116 #ifndef MAXDSIZ
 117 #define MAXDSIZ         (128*1024*1024)         /* max data size */
 118 #endif
 119 #ifndef DFLSSIZ
 120 #define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
 121 #endif
 122 #ifndef MAXSSIZ
 123 #define MAXSSIZ         (32*1024*1024)          /* 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)    /* 16mb */
 131 #define USRPTSIZE       (1 * NPTEPG)    /* 16mb */
 132
 133 /*
 134  * PTEs for mapping user space into the kernel for phyio operations.
 135  * One page is enough to handle 16Mb of simultaneous raw IO operations.
 136  */
 137 #ifndef USRIOSIZE
 138 #define USRIOSIZE       (1 * NPTEPG)    /* 16mb */
 139 #endif
 140
 141 /*
 142  * user/kernel map constants
 143  */
 144 #define VM_MIN_ADDRESS          ((vaddr_t)0)            /* user min */
 145 #define VM_MAX_ADDRESS          ((vaddr_t)(USRSTACK))   /* user max */
 146 #define VM_MAXUSER_ADDRESS      ((vaddr_t)(VM_MAX_ADDRESS))     /* same */
 147 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0)
 148 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)-(NPTEPG * PAGE_SIZE))
 149
 150 /*
 151  * virtual sizes (bytes) for various kernel submaps
 152  */
 153 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 154
 155 /*
 156  * Our bootloader currently passes up to 16 segments (but this is variable)
 157  * Normally, the biggest of them is used for the kernel, and the kernel
 158  * segment is given to VM first.
 159  */
 160 #define VM_PHYSSEG_MAX          (16)
 161 #define VM_PHYSSEG_STRAT        VM_PSTRAT_RANDOM
 162 #define VM_PHYSSEG_NOADD        /* XXX this should be done right later */
 163
 164 /*
 165  * Allow supporting Zorro-II memory as lower priority:
 166  *
 167  *      - DEFAULT for Zorro-III memory (presumably 32 bit)
 168  *      - ZORROII for Zorro-II memory (16 bit, Zorro-II DMA)
 169  */
 170
 171 #define VM_NFREELIST            2
 172 #define VM_FREELIST_DEFAULT     0
 173 #define VM_FREELIST_ZORROII     1
 174
 175 #define __HAVE_PMAP_PHYSSEG
 176
 177 /*
 178  * pmap-specific data stored in the vm_physmem[] array.
 179  */
 180 struct pmap_physseg {
 181         struct pv_header *pvheader;     /* pv table for this seg */
 182 };
 183
 184 /*
 185  * number of kernel PT pages (initial only, can grow dynamically)
 186  */
 187 #define VM_KERNEL_PT_PAGES      ((vm_size_t)8)          /* XXX: SYSPTSIZE */
 188 #endif /* !_MACHINE_VMPARAM_H_ */