sys/arch/alpha/include/vmparam.h

   1 /* $NetBSD: vmparam.h,v 1.32 2008/03/10 13:36:22 ad Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 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 and Ralph Campbell.
  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) 4/22/94
  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 and Ralph Campbell.
  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) 4/22/94
  77  */
  78
  79 #ifndef _ALPHA_VMPARAM_H_
  80 #define _ALPHA_VMPARAM_H_
  81
  82 /*
  83  * Machine dependent constants for Alpha.
  84  */
  85
  86 /*
  87  * All systypes currently supported by NetBSD/alpha have an 8K pages.
  88  * Override the PAGE_* definitions to be compile-time constants.
  89  */
  90 #define PAGE_SHIFT      13
  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  * Digital UNIX (formerly DEC OSF/1) places the stack below the
  98  * text segment (i.e. growing downward from 4G).  We may want to
  99  * consider doing that at some point, but it might require changes
 100  * to the exec code.
 101  */
 102 #define USRSTACK        ((vaddr_t)0x0000000200000000)           /* 8G */
 103
 104 /*
 105  * Virtual memory related constants, all in bytes
 106  */
 107 #ifndef MAXTSIZ
 108 #define MAXTSIZ         (1<<30)                 /* max text size (1G) */
 109 #endif
 110 #ifndef DFLDSIZ
 111 #define DFLDSIZ         (1<<28)                 /* initial data size (256M) */
 112 #endif
 113 #ifndef MAXDSIZ
 114 #define MAXDSIZ         (1<<30)                 /* max data size (1G) */
 115 #endif
 116 #ifndef DFLSSIZ
 117 #define DFLSSIZ         (1<<21)                 /* initial stack size (2M) */
 118 #endif
 119 #ifndef MAXSSIZ
 120 #define MAXSSIZ         (1<<25)                 /* max stack size (32M) */
 121 #endif
 122
 123 /*
 124  * PTEs for mapping user space into the kernel for phyio operations.
 125  * 64 pte's are enough to cover 8 disks * MAXBSIZE.
 126  */
 127 #ifndef USRIOSIZE
 128 #define USRIOSIZE       64
 129 #endif
 130
 131 /*
 132  * Mach derived constants
 133  */
 134
 135 /* user/kernel map constants */
 136 #define VM_MIN_ADDRESS          ((vaddr_t)ALPHA_USEG_BASE)          /* 0 */
 137 #define VM_MAXUSER_ADDRESS      ((vaddr_t)(ALPHA_USEG_END + 1L))    /* 4T */
 138 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
 139 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)ALPHA_K1SEG_BASE)
 140 #define VM_MAX_KERNEL_ADDRESS   trunc_page((vaddr_t)ALPHA_K1SEG_END)
 141
 142 /* virtual sizes (bytes) for various kernel submaps */
 143 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
 144
 145 /* some Alpha-specific constants */
 146 #define VPTBASE         ((vaddr_t)0xfffffffc00000000)   /* Virt. pg table */
 147
 148 #define VM_PHYSSEG_MAX          16              /* XXX */
 149 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
 150 #define VM_PHYSSEG_NOADD                        /* no more after vm_mem_init */
 151
 152 #define VM_NFREELIST            1
 153 #define VM_FREELIST_DEFAULT     0
 154
 155 /*
 156  * pmap-specific data store in the vm_page structure.
 157  */
 158 #define __HAVE_VM_PAGE_MD
 159 struct vm_page_md {
 160         struct pv_entry *pvh_list;              /* pv_entry list */
 161         int pvh_attrs;                          /* page attributes */
 162         unsigned pvh_refcnt;
 163 };
 164
 165 #define VM_MDPAGE_INIT(pg)                                              \
 166 do {                                                                    \
 167         (pg)->mdpage.pvh_list = NULL;                                   \
 168         (pg)->mdpage.pvh_refcnt = 0;                                    \
 169 } while (/*CONSTCOND*/0)
 170
 171 #endif  /* ! _ALPHA_VMPARAM_H_ */