sys/arch/hppa/include/vmparam.h

   1 /*      $NetBSD: vmparam.h,v 1.12.18.4 2009/04/28 07:34:06 skrll Exp $  */
   2
   3 /*      $OpenBSD: vmparam.h,v 1.33 2006/06/04 17:21:24 miod Exp $       */
   4
   5 /*
   6  * Copyright (c) 1988-1994, The University of Utah and
   7  * the Computer Systems Laboratory at the University of Utah (CSL).
   8  * All rights reserved.
   9  *
  10  * Permission to use, copy, modify and distribute this software is hereby
  11  * granted provided that (1) source code retains these copyright, permission,
  12  * and disclaimer notices, and (2) redistributions including binaries
  13  * reproduce the notices in supporting documentation, and (3) all advertising
  14  * materials mentioning features or use of this software display the following
  15  * acknowledgement: ``This product includes software developed by the
  16  * Computer Systems Laboratory at the University of Utah.''
  17  *
  18  * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
  19  * IS" CONDITION.  THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
  20  * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  21  *
  22  * CSL requests users of this software to return to csl-dist@cs.utah.edu any
  23  * improvements that they make and grant CSL redistribution rights.
  24  *
  25  *      Utah $Hdr: vmparam.h 1.16 94/12/16$
  26  */
  27
  28 #ifndef _HPPA_VMPARAM_H_
  29 #define _HPPA_VMPARAM_H_
  30
  31 /*
  32  * Machine dependent constants for HP PA
  33  */
  34
  35 /*
  36  * We use 4K pages on the HP PA.  Override the PAGE_* definitions
  37  * to be compile-time constants.
  38  */
  39 #define PAGE_SHIFT      12
  40 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  41 #define PAGE_MASK       (PAGE_SIZE - 1)
  42
  43 /*
  44  * USRSTACK is the bottom (start) of the user stack.
  45  */
  46 #define USRSTACK        0x70000000              /* Start of user stack */
  47 #define SYSCALLGATE     0xC0000000              /* syscall gateway page */
  48
  49 /*
  50  * Virtual memory related constants, all in bytes
  51  */
  52 #ifndef MAXTSIZ
  53 #define MAXTSIZ         (0x40000000)            /* max text size */
  54 #endif
  55 #ifndef DFLDSIZ
  56 #define DFLDSIZ         (16*1024*1024)          /* initial data size limit */
  57 #endif
  58 #ifndef MAXDSIZ
  59 #define MAXDSIZ         (USRSTACK-MAXTSIZ)      /* max data size */
  60 #endif
  61 #ifndef DFLSSIZ
  62 #define DFLSSIZ         (2*1024*1024)           /* initial stack size limit */
  63 #endif
  64 #ifndef MAXSSIZ
  65 #define MAXSSIZ         (256*1024*1024)         /* max stack size */
  66 #endif
  67
  68 #ifndef USRIOSIZE
  69 #define USRIOSIZE       ((2*HPPA_PGALIAS)/PAGE_SIZE)    /* 2mb */
  70 #endif
  71
  72 /*
  73  * The time for a process to be blocked before being very swappable.
  74  * This is a number of seconds which the system takes as being a non-trivial
  75  * amount of real time.  You probably shouldn't change this;
  76  * it is used in subtle ways (fractions and multiples of it are, that is, like
  77  * half of a ``long time'', almost a long time, etc.)
  78  * It is related to human patience and other factors which don't really
  79  * change over time.
  80  */
  81 /* XXXNH - remove??? */
  82 #define MAXSLP          20
  83
  84 /* user/kernel map constants */
  85 #define VM_MIN_ADDRESS          ((vaddr_t)0)
  86 #define VM_MAXUSER_ADDRESS      ((vaddr_t)0xc0000000)
  87 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
  88
  89 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t)0xc0001000)
  90 #define VM_MAX_KERNEL_ADDRESS   ((vaddr_t)0xef000000)
  91
  92 /* virtual sizes (bytes) for various kernel submaps */
  93 #define VM_PHYS_SIZE            (USRIOSIZE*PAGE_SIZE)
  94
  95 #define VM_PHYSSEG_MAX  8       /* this many physmem segments */
  96 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BIGFIRST
  97
  98 #define VM_PHYSSEG_NOADD        /* XXX until uvm code is fixed */
  99
 100 #define VM_NFREELIST            1
 101 #define VM_FREELIST_DEFAULT     0
 102
 103 #if defined(_KERNEL) && !defined(_LOCORE)
 104 #define __HAVE_VM_PAGE_MD
 105
 106 struct pv_entry;
 107
 108 struct vm_page_md {
 109         kmutex_t        pvh_lock;       /* locks every pv on this list */
 110         struct pv_entry *pvh_list;      /* head of list (locked by pvh_lock) */
 111         u_int           pvh_attrs;      /* to preserve ref/mod */
 112         int             pvh_aliases;    /* alias counting */
 113 };
 114
 115 #define VM_MDPAGE_INIT(pg) \
 116 do {                                                                    \
 117         mutex_init(&(pg)->mdpage.pvh_lock, MUTEX_NODEBUG, IPL_VM);      \
 118         (pg)->mdpage.pvh_list = NULL;                                   \
 119         (pg)->mdpage.pvh_attrs = 0;                                     \
 120         (pg)->mdpage.pvh_aliases = 0;                                   \
 121 } while (0)
 122 #endif
 123
 124 #endif  /* _HPPA_VMPARAM_H_ */