1 /* $NetBSD: vmparam.h,v 1.24 2000/06/09 04:18:19 soda Exp $ */ 2 3 /* 4 * Copyright (c) 1988 University of Utah. 5 * Copyright (c) 1992, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * the Systems Programming Group of the University of Utah Computer 10 * Science Department and Ralph Campbell. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 3. All advertising materials mentioning features or use of this software 21 * must display the following acknowledgement: 22 * This product includes software developed by the University of 23 * California, Berkeley and its contributors. 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 * 40 * from: Utah Hdr: vmparam.h 1.16 91/01/18 41 * 42 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 43 */ 44 45 #ifndef _MIPS_VMPARAM_H_ 46 #define _MIPS_VMPARAM_H_ 47 48 /* 49 * Machine dependent VM constants for MIPS. 50 */ 51 52 /* 53 * USRTEXT is the start of the user text/data space, while USRSTACK 54 * is the top (end) of the user stack. 55 * 56 * USRSTACK needs to start a little below 0x8000000 because the R8000 57 * and some QED CPUs perform some virtual address checks before the 58 * offset is calculated. 59 */ 60 #define USRTEXT 0x00001000 /* Start of user text */ 61 #define USRSTACK 0x7ffff000 /* Start of user stack */ 62 63 /* 64 * Virtual memory related constants, all in bytes 65 */ 66 #ifndef MAXTSIZ 67 #define MAXTSIZ (24*1024*1024) /* max text size */ 68 #endif 69 #ifndef DFLDSIZ 70 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 71 #endif 72 #ifndef MAXDSIZ 73 #define MAXDSIZ (256*1024*1024) /* max data size */ 74 #endif 75 #ifndef DFLSSIZ 76 #define DFLSSIZ (1024*1024) /* initial stack size limit */ 77 #endif 78 #ifndef MAXSSIZ 79 #define MAXSSIZ (32*1024*1024) /* max stack size */ 80 #endif 81 82 /* 83 * PTEs for mapping user space into the kernel for phyio operations. 84 * The default PTE number is enough to cover 8 disks * MAXBSIZE. 85 */ 86 #ifndef USRIOSIZE 87 #define USRIOSIZE (MAXBSIZE/NBPG * 8) 88 #endif 89 90 /* 91 * PTEs for system V style shared memory. 92 * This is basically slop for kmempt which we actually allocate (malloc) from. 93 */ 94 #ifndef SHMMAXPGS 95 #define SHMMAXPGS 1024 /* 4mb */ 96 #endif 97 98 /* 99 * The time for a process to be blocked before being very swappable. 100 * This is a number of seconds which the system takes as being a non-trivial 101 * amount of real time. You probably shouldn't change this; 102 * it is used in subtle ways (fractions and multiples of it are, that is, like 103 * half of a ``long time'', almost a long time, etc.) 104 * It is related to human patience and other factors which don't really 105 * change over time. 106 */ 107 #define MAXSLP 20 108 109 /* 110 * Mach derived constants 111 */ 112 113 /* user/kernel map constants */ 114 #define VM_MIN_ADDRESS ((vaddr_t)0x00000000) 115 #define VM_MAXUSER_ADDRESS ((vaddr_t)0x80000000) 116 #define VM_MAX_ADDRESS ((vaddr_t)0x80000000) 117 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000) 118 #ifdef ENABLE_MIPS_TX3900 119 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFF000000) 120 #else 121 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFC000) 122 #endif 123 124 /* virtual sizes (bytes) for various kernel submaps */ 125 #define VM_PHYS_SIZE (USRIOSIZE*NBPG) 126 127 /* VM_PHYSSEG_MAX defined by platform-dependent code. */ 128 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 129 #define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */ 130 131 /* 132 * pmap-specific data stored in the vm_physmem[] array. 133 */ 134 struct pmap_physseg { 135 struct pv_entry *pvent; /* pv table for this seg */ 136 char *attrs; /* page attributes for this seg */ 137 }; 138 139 #endif /* ! _MIPS_VMPARAM_H_ */ 140