sys/arch/powerpc/include/oea/vmparam.h

   1 /*-
   2  * Copyright (c) 2001 The NetBSD Foundation, Inc.
   3  * All rights reserved.
   4  *
   5  * This code is derived from software contributed to The NetBSD Foundation
   6  * by Matt Thomas <matt@3am-softwre.com> of Allegro Networks, Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  18  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  20  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  21  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  22  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  23  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  24  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  25  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  26  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27  * POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #ifndef _POWERPC_OEA_VMPARAM_H_
  31 #define _POWERPC_OEA_VMPARAM_H_
  32
  33 #include <sys/queue.h>
  34
  35 /*
  36  * Most of the definitions in this can be overriden by a machine-specific
  37  * vmparam.h if required.  Otherwise a port can just include this file
  38  * get the right thing to happen.
  39  */
  40
  41 /*
  42  * OEA processors have 4K pages.  Override the PAGE_* definitions
  43  * to be compile-time constants.
  44  */
  45 #define PAGE_SHIFT      12
  46 #define PAGE_SIZE       (1 << PAGE_SHIFT)
  47 #define PAGE_MASK       (PAGE_SIZE - 1)
  48
  49 #ifndef USRSTACK
  50 #define USRSTACK                VM_MAXUSER_ADDRESS
  51 #endif
  52
  53 #ifndef USRSTACK32
  54 #define USRSTACK32              ((uint32_t)VM_MAXUSER_ADDRESS)
  55 #endif
  56
  57 #ifndef MAXTSIZ
  58 #define MAXTSIZ                 (64*1024*1024)          /* maximum text size */
  59 #endif
  60
  61 #ifndef MAXDSIZ
  62 #define MAXDSIZ                 (1024*1024*1024)        /* maximum data size */
  63 #endif
  64
  65 #ifndef MAXSSIZ
  66 #define MAXSSIZ                 (32*1024*1024)          /* maximum stack size */
  67 #endif
  68
  69 #ifndef DFLDSIZ
  70 #define DFLDSIZ                 (256*1024*1024)         /* default data size */
  71 #endif
  72
  73 #ifndef DFLSSIZ
  74 #define DFLSSIZ                 (2*1024*1024)           /* default stack size */
  75 #endif
  76
  77 /*
  78  * Default number of pages in the user raw I/O map.
  79  */
  80 #ifndef USRIOSIZE
  81 #define USRIOSIZE               1024
  82 #endif
  83
  84 /*
  85  * The number of seconds for a process to be blocked before being
  86  * considered very swappable.
  87  */
  88 #ifndef MAXSLP
  89 #define MAXSLP                  20
  90 #endif
  91
  92 /*
  93  * Segment handling stuff
  94  */
  95 #define SEGMENT_LENGTH  ( 0x10000000L)
  96 #define SEGMENT_MASK    (~0x0fffffffL)
  97
  98 /*
  99  * Macros to manipulate VSIDs
 100  */
 101 #if 0
 102 /*
 103  * Move the SR# to the top bits to make the lower bits entirely random
 104  * so to give better PTE distribution.
 105  */
 106 #define VSID__KEYSHFT           (SR_VSID_WIDTH - SR_KEY_LEN)
 107 #define VSID_SR_INCREMENT       ((1L << VSID__KEYSHFT) - 1)
 108 #define VSID__HASHMASK          (VSID_SR_INCREMENT - 1)
 109 #define VSID_MAKE(sr, hash) \
 110         (( \
 111             (((sr) << VSID__KEYSHFT) | ((hash) & VSID__HASMASK))
 112             << SR_VSID_SHFT) & SR_VSID)
 113 #define VSID_TO_SR(vsid) \
 114         (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__KEYSHFT))
 115 #define VSID_TO_HASH(vsid) \
 116         (((vsid) & SR_VSID) >> SR_VSID_SHFT) & VSID__HASHMASK)
 117 #else
 118 #define VSID__HASHSHFT          (SR_KEY_LEN)
 119 #define VSID_SR_INCREMENT       (1L << 0)
 120 #define VSID__KEYMASK           ((1L << VSID__HASHSHFT) - 1)
 121 #define VSID_MAKE(sr, hash) \
 122         (( \
 123             (((hash) << VSID__HASHSHFT) | ((sr) & VSID__KEYMASK)) \
 124              << SR_VSID_SHFT) & SR_VSID)
 125 #define VSID_TO_SR(vsid) \
 126         (((vsid) >> SR_VSID_SHFT) & VSID__KEYMASK)
 127 #define VSID_TO_HASH(vsid) \
 128         (((vsid) & SR_VSID) >> (SR_VSID_SHFT + VSID__HASHSHFT))
 129 #endif /*0*/
 130
 131 /*
 132  * Fixed segments
 133  */
 134 #ifndef USER_SR
 135 #define USER_SR                 12
 136 #endif
 137 #ifndef KERNEL_SR
 138 #define KERNEL_SR               13
 139 #endif
 140 #ifndef KERNEL2_SR
 141 #define KERNEL2_SR              14
 142 #endif
 143 #define KERNEL2_SEGMENT         VSID_MAKE(KERNEL2_SR, KERNEL_VSIDBITS)
 144 #define KERNEL_VSIDBITS         0xfffff
 145 #define PHYSMAP_VSIDBITS        0xffffe
 146 #define PHYSMAPN_SEGMENT(s)     VSID_MAKE(s, PHYSMAP_VSIDBITS)
 147 #define KERNEL_SEGMENT          VSID_MAKE(KERNEL_SR, KERNEL_VSIDBITS)
 148 #define KERNELN_SEGMENT(s)      VSID_MAKE(s, KERNEL_VSIDBITS)
 149 /* XXXSL: need something here that will never be mapped */
 150 #define EMPTY_SEGMENT           VSID_MAKE(0, 0xffffe)
 151 #define USER_ADDR               ((void *)(USER_SR << ADDR_SR_SHFT))
 152
 153 /*
 154  * Some system constants
 155  */
 156 #ifndef NPMAPS
 157 #define NPMAPS          32768   /* Number of pmaps in system */
 158 #endif
 159
 160 #define VM_MIN_ADDRESS          ((vaddr_t) 0)
 161 #define VM_MAXUSER_ADDRESS      ((vaddr_t) ~0xfffL)
 162 #define VM_MAX_ADDRESS          VM_MAXUSER_ADDRESS
 163 #define VM_MIN_KERNEL_ADDRESS   ((vaddr_t) (KERNEL_SR << ADDR_SR_SHFT))
 164 #define VM_MAX_KERNEL_ADDRESS   (VM_MIN_KERNEL_ADDRESS + 2*SEGMENT_LENGTH)
 165
 166 /*
 167  * The address to which unspecified mapping requests default
 168  * Put the stack in it's own segment and start mmaping at the
 169  * top of the next lower segment.
 170  */
 171 #ifdef _KERNEL_OPT
 172 #include "opt_uvm.h"
 173 #endif
 174 #define __USE_TOPDOWN_VM
 175 #define VM_DEFAULT_ADDRESS(da, sz) \
 176         (((VM_MAXUSER_ADDRESS - MAXSSIZ) & SEGMENT_MASK) - round_page(sz))
 177
 178 #ifndef VM_PHYSSEG_MAX
 179 #define VM_PHYSSEG_MAX          16
 180 #endif
 181 #define VM_PHYSSEG_STRAT        VM_PSTRAT_BIGFIRST
 182 #define VM_PHYSSEG_NOADD
 183
 184 #ifndef VM_PHYS_SIZE
 185 #define VM_PHYS_SIZE            (USRIOSIZE * PAGE_SIZE)
 186 #endif
 187
 188 #ifndef VM_MAX_KERNEL_BUF
 189 #define VM_MAX_KERNEL_BUF       (SEGMENT_LENGTH * 3 / 4)
 190 #endif
 191
 192 #define VM_NFREELIST            16      /* 16 distinct memory segments */
 193 #define VM_FREELIST_DEFAULT     0
 194 #define VM_FREELIST_FIRST256    1
 195 #define VM_FREELIST_FIRST16     2
 196 #define VM_FREELIST_MAX         3
 197
 198 #ifndef _LOCORE
 199
 200 LIST_HEAD(pvo_head, pvo_entry);
 201
 202 #define __HAVE_VM_PAGE_MD
 203
 204 struct vm_page_md {
 205         struct pvo_head mdpg_pvoh;
 206         unsigned int mdpg_attrs;
 207 };
 208
 209 #define VM_MDPAGE_INIT(pg) do {                 \
 210         LIST_INIT(&(pg)->mdpage.mdpg_pvoh);     \
 211         (pg)->mdpage.mdpg_attrs = 0;            \
 212 } while (/*CONSTCOND*/0)
 213
 214 #endif  /* _LOCORE */
 215
 216 #endif /* _POWERPC_OEA_VMPARAM_H_ */