vmparam.h revision 1.16
1 /* $NetBSD: vmparam.h,v 1.16 2007/11/22 16:16:46 bouyer 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 #ifdef _KERNEL_OPT 42 #include "opt_xen.h" 43 #endif 44 45 /* 46 * Machine dependent constants for 386. 47 */ 48 49 /* 50 * Page size on the amd64 s not variable in the traditional sense. 51 * We override the PAGE_* definitions to compile-time constants. 52 */ 53 #define PAGE_SHIFT 12 54 #define PAGE_SIZE (1 << PAGE_SHIFT) 55 #define PAGE_MASK (PAGE_SIZE - 1) 56 57 /* 58 * USRSTACK is the top (end) of the user stack. Immediately above the 59 * user stack resides the user structure, which is UPAGES long and contains 60 * the kernel stack. 61 * 62 * Immediately after the user structure is the page table map, and then 63 * kernel address space. 64 */ 65 #define USRSTACK VM_MAXUSER_ADDRESS 66 67 #define USRSTACK32 VM_MAXUSER_ADDRESS32 68 69 /* 70 * Virtual memory related constants, all in bytes 71 */ 72 #define MAXTSIZ (64*1024*1024) /* max text size */ 73 #ifndef DFLDSIZ 74 #define DFLDSIZ (256*1024*1024) /* initial data size limit */ 75 #endif 76 #ifndef MAXDSIZ 77 #define MAXDSIZ (8L*1024*1024*1024) /* max data size */ 78 #endif 79 #ifndef DFLSSIZ 80 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 81 #endif 82 #ifndef MAXSSIZ 83 #define MAXSSIZ (32*1024*1024) /* max stack size */ 84 #endif 85 86 /* 87 * 32bit memory related constants. 88 */ 89 90 #define MAXTSIZ32 (64*1024*1024) 91 #ifndef DFLDSIZ32 92 #define DFLDSIZ32 (256*1024*1024) /* initial data size limit */ 93 #endif 94 #ifndef MAXDSIZ32 95 #define MAXDSIZ32 (3U*1024*1024*1024) /* max data size */ 96 #endif 97 #ifndef DFLSSIZ32 98 #define DFLSSIZ32 (2*1024*1024) /* initial stack size limit */ 99 #endif 100 #ifndef MAXSSIZ32 101 #define MAXSSIZ32 (64*1024*1024) /* max stack size */ 102 #endif 103 104 /* 105 * Size of shared memory map 106 */ 107 #ifndef SHMMAXPGS 108 #define SHMMAXPGS 2048 109 #endif 110 111 /* 112 * Size of User Raw I/O map 113 */ 114 #define USRIOSIZE 300 115 116 /* 117 * Mach derived constants 118 */ 119 120 /* user/kernel map constants */ 121 #define VM_MIN_ADDRESS 0 122 #define VM_MAXUSER_ADDRESS 0x00007f8000000000 123 #define VM_MAX_ADDRESS 0x00007fbfdfeff000 124 #ifndef XEN 125 #define VM_MIN_KERNEL_ADDRESS 0xffff800000000000 126 #else /* XEN */ 127 #define VM_MIN_KERNEL_ADDRESS 0xffffa00000000000 128 #endif 129 #define VM_MAX_KERNEL_ADDRESS 0xffffff8000000000 130 131 #define VM_MAXUSER_ADDRESS32 0xfffff000 132 133 /* 134 * The address to which unspecified mapping requests default 135 */ 136 #ifdef _KERNEL_OPT 137 #include "opt_uvm.h" 138 #endif 139 #define __USE_TOPDOWN_VM 140 #define VM_DEFAULT_ADDRESS(da, sz) \ 141 trunc_page(USRSTACK - MAXSSIZ - (sz)) 142 #define VM_DEFAULT_ADDRESS32(da, sz) \ 143 trunc_page(USRSTACK32 - MAXSSIZ32 - (sz)) 144 145 /* 146 * XXXfvdl we have plenty of KVM now, remove this. 147 */ 148 #ifndef VM_MAX_KERNEL_BUF 149 #define VM_MAX_KERNEL_BUF (384 * 1024 * 1024) 150 #endif 151 152 /* virtual sizes (bytes) for various kernel submaps */ 153 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 154 155 #define VM_PHYSSEG_MAX 10 /* 1 "hole" + 9 free lists */ 156 #define VM_PHYSSEG_STRAT VM_PSTRAT_BIGFIRST 157 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 158 159 #define VM_NFREELIST 2 160 #define VM_FREELIST_DEFAULT 0 161 #define VM_FREELIST_FIRST16 1 162 163 #define __HAVE_VM_PAGE_MD 164 #define VM_MDPAGE_INIT(pg) \ 165 memset(&(pg)->mdpage, 0, sizeof((pg)->mdpage)); \ 166 mutex_init(&(pg)->mdpage.mp_pvhead.pvh_lock, MUTEX_NODEBUG, IPL_VM); \ 167 SPLAY_INIT(&(pg)->mdpage.mp_pvhead.pvh_root); 168 169 struct pv_entry; 170 171 struct pv_head { 172 kmutex_t pvh_lock; /* locks every pv in this tree */ 173 SPLAY_HEAD(pvtree, pv_entry) pvh_root; 174 /* head of tree (locked by pvh_lock) */ 175 }; 176 177 struct vm_page_md { 178 struct pv_head mp_pvhead; 179 struct vm_page *mp_link; 180 int mp_attrs; /* only 2 bits (PG_U and PG_M) are actually used. */ 181 }; 182 183 #endif /* _VMPARAM_H_ */ 184
Indexes created Mon Sep 29 21:09:56 GMT 2025