1 /* $NetBSD: vmparam.h,v 1.30 2001/11/15 18:06:15 soren 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 * We use a 4K page on MIPS systems. Override PAGE_* definitions 54 * to compile-time constants. 55 */ 56 #define PAGE_SHIFT 12 57 #define PAGE_SIZE (1 << PAGE_SHIFT) 58 #define PAGE_MASK (PAGE_SIZE - 1) 59 60 /* 61 * USRTEXT is the start of the user text/data space, while USRSTACK 62 * is the top (end) of the user stack. 63 * 64 * USRSTACK needs to start a little below 0x8000000 because the R8000 65 * and some QED CPUs perform some virtual address checks before the 66 * offset is calculated. 67 */ 68 #define USRTEXT 0x00001000 /* Start of user text */ 69 #define USRSTACK 0x7ffff000 /* Start of user stack */ 70 71 /* alignment requirement for u-area space in bytes */ 72 #define USPACE_ALIGN USPACE 73 74 /* 75 * Virtual memory related constants, all in bytes 76 */ 77 #ifndef MAXTSIZ 78 #define MAXTSIZ (64*1024*1024) /* max text size */ 79 #endif 80 #ifndef DFLDSIZ 81 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 82 #endif 83 #ifndef MAXDSIZ 84 #define MAXDSIZ (512*1024*1024) /* max data size */ 85 #endif 86 #ifndef DFLSSIZ 87 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 88 #endif 89 #ifndef MAXSSIZ 90 #define MAXSSIZ (32*1024*1024) /* max stack size */ 91 #endif 92 93 /* 94 * PTEs for mapping user space into the kernel for phyio operations. 95 * The default PTE number is enough to cover 8 disks * MAXBSIZE. 96 */ 97 #ifndef USRIOSIZE 98 #define USRIOSIZE (MAXBSIZE/NBPG * 8) 99 #endif 100 101 /* 102 * PTEs for system V style shared memory. 103 * This is basically slop for kmempt which we actually allocate (malloc) from. 104 */ 105 #ifndef SHMMAXPGS 106 #define SHMMAXPGS 1024 /* 4mb */ 107 #endif 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 #define __HAVE_PMAP_PHYSSEG 132 133 /* 134 * pmap-specific data stored in the vm_physmem[] array. 135 */ 136 struct pmap_physseg { 137 struct pv_entry *pvent; /* pv table for this seg */ 138 char *attrs; /* page attributes for this seg */ 139 }; 140 141 #endif /* ! _MIPS_VMPARAM_H_ */ 142