sys/arch/sparc/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.39 2008/01/02 11:48:29 ad Exp $ */
   2
   3 /*
   4  * Copyright (c) 1992, 1993
   5  *      The Regents of the University of California.  All rights reserved.
   6  *
   7  * This software was developed by the Computer Systems Engineering group
   8  * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
   9  * contributed to Berkeley.
  10  *
  11  * All advertising materials mentioning features or use of this software
  12  * must display the following acknowledgement:
  13  *      This product includes software developed by the University of
  14  *      California, Lawrence Berkeley Laboratory.
  15  *
  16  * Redistribution and use in source and binary forms, with or without
  17  * modification, are permitted provided that the following conditions
  18  * are met:
  19  * 1. Redistributions of source code must retain the above copyright
  20  *    notice, this list of conditions and the following disclaimer.
  21  * 2. Redistributions in binary form must reproduce the above copyright
  22  *    notice, this list of conditions and the following disclaimer in the
  23  *    documentation and/or other materials provided with the distribution.
  24  * 3. Neither the name of the University nor the names of its contributors
  25  *    may be used to endorse or promote products derived from this software
  26  *    without specific prior written permission.
  27  *
  28  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  29  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  30  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  31  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  32  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  33  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  34  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  35  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  36  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  37  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  38  * SUCH DAMAGE.
  39  *
  40  *      @(#)vmparam.h   8.1 (Berkeley) 6/11/93
  41  */
  42
  43 #ifndef _SPARC_VMPARAM_H_
  44 #define _SPARC_VMPARAM_H_
  45
  46 /*
  47  * Machine dependent constants for SPARC
  48  */
  49
  50 #include <machine/cpuconf.h>
  51
  52 /*
  53  * Sun4 systems have a 8K page size.  All other platforms have a
  54  * 4K page size.  We need to define these upper and lower limits
  55  * for machine-independent code.  We also try to make PAGE_SIZE,
  56  * PAGE_SHIFT, and PAGE_MASK into compile-time constants, if we can.
  57  *
  58  * XXX Should garbage-collect the version of this from <machine/param.h>.
  59  */
  60 #define PAGE_SHIFT_SUN4         13
  61 #define PAGE_SHIFT_SUN4CM       12
  62
  63 #define MIN_PAGE_SIZE           (1 << PAGE_SHIFT_SUN4CM)
  64 #define MAX_PAGE_SIZE           (1 << PAGE_SHIFT_SUN4)
  65
  66 #if CPU_NTYPES != 0 && !defined(SUN4)
  67 #define PAGE_SHIFT              PAGE_SHIFT_SUN4CM
  68 #define PAGE_SIZE               (1 << PAGE_SHIFT)
  69 #define PAGE_MASK               (PAGE_SIZE - 1)
  70 #elif CPU_NTYPES == 1 && defined(SUN4)
  71 #define PAGE_SHIFT              PAGE_SHIFT_SUN4
  72 #define PAGE_SIZE               (1 << PAGE_SHIFT)
  73 #define PAGE_MASK               (PAGE_SIZE - 1)
  74 #endif
  75
  76 /*
  77  * USRSTACK is the top (end) of the user stack.
  78  */
  79 #define USRSTACK        KERNBASE                /* Start of user stack */
  80
  81 /*
  82  * Virtual memory related constants, all in bytes
  83  */
  84 #ifndef MAXTSIZ
  85 #define MAXTSIZ         (64*1024*1024)          /* max text size */
  86 #endif
  87 #ifndef DFLDSIZ
  88 #define DFLDSIZ         (64*1024*1024)          /* initial data size limit */
  89 #endif
  90 #ifndef MAXDSIZ
  91 #define MAXDSIZ         (512*1024*1024)         /* max data size */
  92 #endif
  93 #ifndef DFLSSIZ
  94 #define DFLSSIZ         (8*1024*1024)           /* initial stack size limit */
  95 #endif
  96 #ifndef MAXSSIZ
  97 #define MAXSSIZ         (32*1024*1024)          /* max stack size */
  98 #endif
  99
 100 /*
 101  * Mach derived constants
 102  */
 103
 104 /*
 105  * User/kernel map constants.  Note that sparc/vaddrs.h defines the
 106  * IO space virtual base, which must be the same as VM_MAX_KERNEL_ADDRESS:
 107  * tread with care.
 108  */
 109 #define VM_MIN_ADDRESS          ((vaddr_t)0)
 110 #define VM_MAX_ADDRESS          ((vaddr_t)KERNBASE)
 111 #define VM_MAXUSER_ADDRESS      ((vaddr_t)KERNBASE)
 112 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)KERNBASE)
 113 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)KERNEND)
 114
 115 #define VM_PHYSSEG_MAX          32       /* up to 32 segments */
 116 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BSEARCH
 117 #define VM_PHYSSEG_NOADD                /* can't add RAM after vm_mem_init */
 118
 119 #define VM_NFREELIST            1
 120 #define VM_FREELIST_DEFAULT     0
 121
 122 #define __HAVE_VM_PAGE_MD
 123
 124 /*
 125  * For each managed physical page, there is a list of all currently
 126  * valid virtual mappings of that page.  Since there is usually one
 127  * (or zero) mapping per page, the table begins with an initial entry,
 128  * rather than a pointer; this head entry is empty iff its pv_pmap
 129  * field is NULL.
 130  */
 131 struct vm_page_md {
 132         struct pvlist {
 133                 struct  pvlist *pv_next;        /* next pvlist, if any */
 134                 struct  pmap *pv_pmap;          /* pmap of this va */
 135                 vaddr_t pv_va;                  /* virtual address */
 136                 int     pv_flags;               /* flags (below) */
 137         } pvlisthead;
 138 };
 139 #define VM_MDPAGE_PVHEAD(pg)    (&(pg)->mdpage.pvlisthead)
 140
 141 #define VM_MDPAGE_INIT(pg) do {                         \
 142         (pg)->mdpage.pvlisthead.pv_next = NULL;         \
 143         (pg)->mdpage.pvlisthead.pv_pmap = NULL;         \
 144         (pg)->mdpage.pvlisthead.pv_va = 0;              \
 145         (pg)->mdpage.pvlisthead.pv_flags = 0;           \
 146 } while(/*CONSTCOND*/0)
 147
 148 #endif /* _SPARC_VMPARAM_H_ */