1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * Copyright (c) 1994 John S. Dyson 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * from: @(#)vmparam.h 5.9 (Berkeley) 5/12/91 39 * $Id: vmparam.h,v 1.17 1995/01/09 16:04:44 davidg Exp $ 40 */ 41 42 43 #ifndef _MACHINE_VMPARAM_H_ 44 #define _MACHINE_VMPARAM_H_ 1 45 46 /* 47 * Machine dependent constants for 386. 48 */ 49 50 /* 51 * Virtual memory related constants, all in bytes 52 */ 53 #define MAXTSIZ (16UL*1024*1024) /* max text size */ 54 #ifndef DFLDSIZ 55 #define DFLDSIZ (64UL*1024*1024) /* initial data size limit */ 56 #endif 57 #ifndef MAXDSIZ 58 #define MAXDSIZ (128UL*1024*1024) /* max data size */ 59 #endif 60 #ifndef DFLSSIZ 61 #define DFLSSIZ (8UL*1024*1024) /* initial stack size limit */ 62 #endif 63 #ifndef MAXSSIZ 64 #define MAXSSIZ (64UL*1024*1024) /* max stack size */ 65 #endif 66 #ifndef SGROWSIZ 67 #define SGROWSIZ (128UL*1024) /* amount to grow stack */ 68 #endif 69 70 #define USRTEXT (1*NBPG) /* base of user text XXX bogus */ 71 72 /* 73 * Default sizes of swap allocation chunks (see dmap.h). 74 * The actual values may be changed in vminit() based on MAXDSIZ. 75 * With MAXDSIZ of 16Mb and NDMAP of 38, dmmax will be 1024. 76 */ 77 #define DMMIN 32 /* smallest swap allocation */ 78 #define DMMAX 4096 /* largest potential swap allocation */ 79 #define DMTEXT 1024 /* swap allocation for text */ 80 81 /* 82 * Sizes of the system and user portions of the system page table. 83 */ 84 #define SYSPTSIZE (2*NPTEPG) 85 #define USRPTSIZE (2*NPTEPG) 86 87 /* 88 * Size of the Shared Memory Pages page table. 89 */ 90 #ifndef SHMMAXPGS 91 #define SHMMAXPGS 1024 /* XXX until we have more kmap space */ 92 #endif 93 94 /* 95 * Size of User Raw I/O map 96 */ 97 #define USRIOSIZE 1024 98 99 /* 100 * The time for a process to be blocked before being very swappable. 101 * This is a number of seconds which the system takes as being a non-trivial 102 * amount of real time. You probably shouldn't change this; 103 * it is used in subtle ways (fractions and multiples of it are, that is, like 104 * half of a ``long time'', almost a long time, etc.) 105 * It is related to human patience and other factors which don't really 106 * change over time. 107 */ 108 #define MAXSLP 20 109 110 /* 111 * Mach derived constants 112 */ 113 114 /* user/kernel map constants */ 115 #define KERNBASE ((0x400-1-NKPDE)*(NBPG*NPTEPG)) 116 117 #define VM_MIN_ADDRESS ((vm_offset_t)0) 118 #define VM_MAXUSER_ADDRESS ((vm_offset_t)KERNBASE - (NBPG*(NPTEPG+UPAGES))) 119 #define USRSTACK VM_MAXUSER_ADDRESS 120 #define UPT_MIN_ADDRESS ((vm_offset_t)KERNBASE - (NBPG*NPTEPG)) 121 #define UPT_MAX_ADDRESS ((vm_offset_t)KERNBASE - (NBPG*(NKPDE+2))) 122 #define VM_MAX_ADDRESS UPT_MAX_ADDRESS 123 #define VM_MIN_KERNEL_ADDRESS ((vm_offset_t)KERNBASE - (NBPG*(NKPDE+2))) 124 #define UPDT VM_MIN_KERNEL_ADDRESS 125 #define KPT_MIN_ADDRESS ((vm_offset_t)KERNBASE - NBPG*(NKPDE+1)) 126 #define KPT_MAX_ADDRESS ((vm_offset_t)KERNBASE - NBPG) 127 #define VM_MAX_KERNEL_ADDRESS ((vm_offset_t)KERNBASE + NKPDE*NBPG*NPTEPG) 128 129 /* virtual sizes (bytes) for various kernel submaps */ 130 #define VM_KMEM_SIZE (32 * 1024 * 1024) 131 #define VM_PHYS_SIZE (USRIOSIZE*CLBYTES) 132 133 #endif /* _MACHINE_VMPARAM_H_ */ 134