1 /* $OpenBSD: vmparam.h,v 1.43 2009/06/16 16:42:41 ariane Exp $ */ 2 /* $NetBSD: vmparam.h,v 1.15 1994/10/27 04:16:34 cgd Exp $ */ 3 4 /*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)vmparam.h 5.9 (Berkeley) 5/12/91 36 */ 37 38 #ifndef _MACHINE_VM_PARAM_H_ 39 #define _MACHINE_VM_PARAM_H_ 40 /* 41 * Machine dependent constants for 386. 42 */ 43 44 /* 45 * Virtual address space arrangement. On 386, both user and kernel 46 * share the address space, not unlike the vax. 47 * USRTEXT is the start of the user text/data space, while USRSTACK 48 * is the top (end) of the user stack. Immediately above the user stack 49 * resides the user structure, which is UPAGES long and contains the 50 * kernel stack. 51 * 52 * Immediately after the user structure is the page table map, and then 53 * kernel address space. 54 */ 55 #define USRTEXT PAGE_SIZE 56 #define USRSTACK VM_MAXUSER_ADDRESS 57 58 /* 59 * Virtual memory related constants, all in bytes 60 */ 61 #define MAXTSIZ (64*1024*1024) /* max text size */ 62 #ifndef DFLDSIZ 63 #define DFLDSIZ (64*1024*1024) /* initial data size limit */ 64 #endif 65 #ifndef MAXDSIZ 66 #define MAXDSIZ (1024*1024*1024) /* max data size */ 67 #endif 68 #ifndef DFLSSIZ 69 #define DFLSSIZ (4*1024*1024) /* initial stack size limit */ 70 #endif 71 #ifndef MAXSSIZ 72 #define MAXSSIZ (32*1024*1024) /* max stack size */ 73 #endif 74 75 #define STACKGAP_RANDOM 256*1024 76 77 /* I386 has a line where all code is executable: 0 - I386_MAX_EXE_ADDR */ 78 #define I386_MAX_EXE_ADDR 0x20000000 /* exec line */ 79 80 /* map PIE into 320MB - 448MB address range */ 81 #define VM_PIE_MIN_ADDR 0x14000000 82 #define VM_PIE_MAX_ADDR 0x1C000000 83 84 /* 85 * Size of shared memory map 86 */ 87 #ifndef SHMMAXPGS 88 #define SHMMAXPGS 8192 89 #endif 90 91 /* 92 * Size of User Raw I/O map 93 */ 94 #define USRIOSIZE 300 95 96 /* 97 * Specific addresses being unmapped and used as fillers for free memory. 98 */ 99 #define DEADBEEF0 0xefffeecc /* malloc's filler */ 100 #define DEADBEEF1 0xefffaabb /* pool's filler */ 101 102 /* user/kernel map constants */ 103 #define VM_MIN_ADDRESS ((vaddr_t)PAGE_SIZE) 104 #define VM_MAXUSER_ADDRESS ((vaddr_t)((PDSLOT_PTE<<PDSHIFT) - USPACE)) 105 #define VM_MAX_ADDRESS ((vaddr_t)((PDSLOT_PTE<<PDSHIFT) + \ 106 (PDSLOT_PTE<<PGSHIFT))) 107 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)KERNBASE) 108 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)(PDSLOT_APTE<<PDSHIFT)) 109 110 /* virtual sizes (bytes) for various kernel submaps */ 111 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 112 113 #define VM_PHYSSEG_MAX 16 /* actually we could have this many segments */ 114 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 115 #define VM_PHYSSEG_NOADD /* can't add RAM after vm_mem_init */ 116 117 #define VM_NFREELIST 2 118 #define VM_FREELIST_DEFAULT 0 119 #define VM_FREELIST_FIRST16 1 120 121 #define __HAVE_VM_PAGE_MD 122 struct pv_entry; 123 struct vm_page_md { 124 struct pv_entry *pv_list; 125 }; 126 127 #define VM_MDPAGE_INIT(pg) do { \ 128 (pg)->mdpage.pv_list = NULL; \ 129 } while (0) 130 131 #endif /* _MACHINE_VM_PARAM_H_ */ 132