vmparam.h revision 1.17
1 /* $NetBSD: vmparam.h,v 1.17 2008/01/06 20:53:38 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 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 * William Jolitz. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 35 */ 36 37 #ifndef _VMPARAM_H_ 38 #define _VMPARAM_H_ 39 40 #include <sys/tree.h> 41 #include <sys/mutex.h> 42 #ifdef _KERNEL_OPT 43 #include "opt_xen.h" 44 #endif 45 46 /* 47 * Machine dependent constants for 386. 48 */ 49 50 /* 51 * Page size on the amd64 s not variable in the traditional sense. 52 * We override the PAGE_* definitions to compile-time constants. 53 */ 54 #define PAGE_SHIFT 12 55 #define PAGE_SIZE (1 << PAGE_SHIFT) 56 #define PAGE_MASK (PAGE_SIZE - 1) 57 58 /* 59 * USRSTACK is the top (end) of the user stack. Immediately above the 60 * user stack resides the user structure, which is UPAGES long and contains 61 * the kernel stack. 62 * 63 * Immediately after the user structure is the page table map, and then 64 * kernel address space. 65 */ 66 #define USRSTACK VM_MAXUSER_ADDRESS 67 68 #define USRSTACK32 VM_MAXUSER_ADDRESS32 69 70 /* 71 * Virtual memory related constants, all in bytes 72 */ 73 #define MAXTSIZ (64*1024*1024) /* max text size */ 74 #ifndef DFLDSIZ 75 #define DFLDSIZ (256*1024*1024) /* initial data size limit */ 76 #endif 77 #ifndef MAXDSIZ 78 #define MAXDSIZ (8L*1024*1024*1024) /* max data size */ 79 #endif 80 #ifndef DFLSSIZ 81 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 82 #endif 83 #ifndef MAXSSIZ 84 #define MAXSSIZ (32*1024*1024) /* max stack size */ 85 #endif 86 87 /* 88 * 32bit memory related constants. 89 */ 90 91 #define MAXTSIZ32 (64*1024*1024) 92 #ifndef DFLDSIZ32 93 #define DFLDSIZ32 (256*1024*1024) /* initial data size limit */ 94 #endif 95 #ifndef MAXDSIZ32 96 #define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */ 97 #endif 98 #ifndef DFLSSIZ32 99 #define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */ 100 #endif 101 #ifndef MAXSSIZ32 102 #define MAXSSIZ32 (64*1024*1024) /* max stack size */ 103 #endif 104 105 /* 106 * Size of shared memory map 107 */ 108 #ifndef SHMMAXPGS 109 #define SHMMAXPGS 2048 110 #endif 111 112 /* 113 * Size of User Raw I/O map 114 */ 115 #define USRIOSIZE 300 116 117 /* 118 * Mach derived constants 119 */ 120 121 /* user/kernel map constants */ 122 #define VM_MIN_ADDRESS 0 123 #define VM_MAXUSER_ADDRESS 0x00007f8000000000 124 #define VM_MAX_ADDRESS 0x00007fbfdfeff000 125 #ifndef XEN 126 #define VM_MIN_KERNEL_ADDRESS 0xffff800000000000 127 #else /* XEN */ 128 #define VM_MIN_KERNEL_ADDRESS 0xffffa00000000000 129 #endif 130 #define VM_MAX_KERNEL_ADDRESS 0xffffff8000000000 131 132 #define VM_MAXUSER_ADDRESS32 0xfffff000 133 134 /* 135 * The address to which unspecified mapping requests default 136 */ 137 #ifdef _KERNEL_OPT 138 #include "opt_uvm.h" 139 #endif 140 #define __USE_TOPDOWN_VM 141 #define VM_DEFAULT_ADDRESS(da, sz) \ 142 trunc_page(USRSTACK - MAXSSIZ - (sz)) 143 #define VM_DEFAULT_ADDRESS32(da, sz) \ 144 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz)) 145 146 /* 147 * XXXfvdl we have plenty of KVM now, remove this. 148 */ 149 #ifndef VM_MAX_KERNEL_BUF 150 #define VM_MAX_KERNEL_BUF (384 * 1024 * 1024) 151 #endif 152 153 /* virtual sizes (bytes) for various kernel submaps */ 154 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 155 156 #define VM_PHYSSEG_MAX 10 /* 1 "hole" + 9 free lists */ 157 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 158 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 159 160 #define VM_NFREELIST 2 161 #define VM_FREELIST_DEFAULT 0 162 #define VM_FREELIST_FIRST16 1 163 164 #define __HAVE_VM_PAGE_MD 165 #define VM_MDPAGE_INIT(pg) \ 166 memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage)); \ 167 mutex_init(&(pg)->mdpage.mp_pvhead.pvh_lock, MUTEX_NODEBUG, IPL_VM); \ 168 SPLAY_INIT(&(pg)->mdpage.mp_pvhead.pvh_root); 169 170 struct pv_entry; 171 172 struct pv_head { 173 kmutex_t pvh_lock; /* locks every pv in this tree */ 174 SPLAY_HEAD(pvtree, pv_entry) pvh_root; 175 /* head of tree (locked by pvh_lock) */ 176 }; 177 178 struct vm_page_md { 179 struct pv_head mp_pvhead; 180 struct vm_page *mp_link; 181 int mp_attrs; /* only 2 bits (PG_U and PG_M) are actually used. */ 182 }; 183 184 #endif /* _VMPARAM_H_ */ 185
Indexes created Mon Sep 29 21:09:56 GMT 2025