vmparam.h revision 1.37
1 /* $NetBSD: vmparam.h,v 1.37 2005/01/17 05:26:02 simonb Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department and Ralph Campbell. 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 * from: Utah Hdr: vmparam.h 1.16 91/01/18 36 * 37 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 38 */ 39 /* 40 * Copyright (c) 1988 University of Utah. 41 * 42 * This code is derived from software contributed to Berkeley by 43 * the Systems Programming Group of the University of Utah Computer 44 * Science Department and Ralph Campbell. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. All advertising materials mentioning features or use of this software 55 * must display the following acknowledgement: 56 * This product includes software developed by the University of 57 * California, Berkeley and its contributors. 58 * 4. Neither the name of the University nor the names of its contributors 59 * may be used to endorse or promote products derived from this software 60 * without specific prior written permission. 61 * 62 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 63 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 64 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 65 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 66 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 67 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 68 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 69 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 70 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 71 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 72 * SUCH DAMAGE. 73 * 74 * from: Utah Hdr: vmparam.h 1.16 91/01/18 75 * 76 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 77 */ 78 79 #ifndef _MIPS_VMPARAM_H_ 80 #define _MIPS_VMPARAM_H_ 81 82 /* 83 * Machine dependent VM constants for MIPS. 84 */ 85 86 /* 87 * We use a 4K page on MIPS systems. Override PAGE_* definitions 88 * to compile-time constants. 89 */ 90 #define PAGE_SHIFT 12 91 #define PAGE_SIZE (1 << PAGE_SHIFT) 92 #define PAGE_MASK (PAGE_SIZE - 1) 93 94 /* 95 * USRSTACK is the top (end) of the user stack. 96 * 97 * USRSTACK needs to start a little below 0x8000000 because the R8000 98 * and some QED CPUs perform some virtual address checks before the 99 * offset is calculated. 100 */ 101 #define USRSTACK 0x7ffff000 /* Start of user stack */ 102 103 /* alignment requirement for u-area space in bytes */ 104 #define USPACE_ALIGN USPACE 105 106 /* 107 * Virtual memory related constants, all in bytes 108 */ 109 #ifndef MAXTSIZ 110 #define MAXTSIZ (64*1024*1024) /* max text size */ 111 #endif 112 #ifndef DFLDSIZ 113 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 114 #endif 115 #ifndef MAXDSIZ 116 #define MAXDSIZ (512*1024*1024) /* max data size */ 117 #endif 118 #ifndef DFLSSIZ 119 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 120 #endif 121 #ifndef MAXSSIZ 122 #define MAXSSIZ (32*1024*1024) /* max stack size */ 123 #endif 124 125 /* 126 * PTEs for mapping user space into the kernel for phyio operations. 127 * The default PTE number is enough to cover 8 disks * MAXBSIZE. 128 */ 129 #ifndef USRIOSIZE 130 #define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8) 131 #endif 132 133 /* 134 * PTEs for system V style shared memory. 135 * This is basically slop for kmempt which we actually allocate (malloc) from. 136 */ 137 #ifndef SHMMAXPGS 138 #define SHMMAXPGS 1024 /* 4mb */ 139 #endif 140 141 /* 142 * Mach derived constants 143 */ 144 145 /* user/kernel map constants */ 146 #define VM_MIN_ADDRESS ((vaddr_t)0x00000000) 147 #define VM_MAXUSER_ADDRESS ((vaddr_t)0x80000000) 148 #define VM_MAX_ADDRESS ((vaddr_t)0x80000000) 149 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000) 150 #ifdef ENABLE_MIPS_TX3900 151 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFF000000) 152 #else 153 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFC000) 154 #endif 155 156 /* 157 * The address to which unspecified mapping requests default 158 */ 159 #define __USE_TOPDOWN_VM 160 #define VM_DEFAULT_ADDRESS(da, sz) \ 161 trunc_page(USRSTACK - MAXSSIZ - (sz)) 162 163 /* virtual sizes (bytes) for various kernel submaps */ 164 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 165 166 /* VM_PHYSSEG_MAX defined by platform-dependent code. */ 167 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 168 #define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */ 169 170 #define __HAVE_PMAP_PHYSSEG 171 172 /* 173 * pmap-specific data stored in the vm_physmem[] array. 174 */ 175 struct pmap_physseg { 176 struct pv_entry *pvent; /* pv table for this seg */ 177 char *attrs; /* page attributes for this seg */ 178 }; 179 180 #endif /* ! _MIPS_VMPARAM_H_ */ 181
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