1 /* $NetBSD: vmparam.h,v 1.43 2009/08/09 04:02:40 matt 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 normally use a 4K page but may use 16K on MIPS systems. 88 * Override PAGE_* definitions to compile-time constants. 89 */ 90 #ifdef ENABLE_MIPS_16KB_PAGE 91 #define PAGE_SHIFT 14 92 #elif defined(ENABLE_MIPS_4KB_PAGE) || 1 93 #define PAGE_SHIFT 12 94 #else 95 #error ENABLE_MIPS_xKB_PAGE not defined 96 #endif 97 #define PAGE_SIZE (1 << PAGE_SHIFT) 98 #define PAGE_MASK (PAGE_SIZE - 1) 99 100 /* 101 * USRSTACK is the top (end) of the user stack. 102 * 103 * USRSTACK needs to start a little below 0x8000000 because the R8000 104 * and some QED CPUs perform some virtual address checks before the 105 * offset is calculated. 106 */ 107 #define USRSTACK (0x7fffffff & ~PAGE_MASK) /* Start of user stack */ 108 109 /* alignment requirement for u-area space in bytes */ 110 #define USPACE_ALIGN USPACE 111 112 /* 113 * Virtual memory related constants, all in bytes 114 */ 115 #ifndef MAXTSIZ 116 #define MAXTSIZ (64*1024*1024) /* max text size */ 117 #endif 118 #ifndef DFLDSIZ 119 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 120 #endif 121 #ifndef MAXDSIZ 122 #define MAXDSIZ (512*1024*1024) /* max data size */ 123 #endif 124 #ifndef DFLSSIZ 125 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 126 #endif 127 #ifndef MAXSSIZ 128 #define MAXSSIZ (32*1024*1024) /* max stack size */ 129 #endif 130 131 /* 132 * PTEs for mapping user space into the kernel for phyio operations. 133 * The default PTE number is enough to cover 8 disks * MAXBSIZE. 134 */ 135 #ifndef USRIOSIZE 136 #define USRIOSIZE (MAXBSIZE/PAGE_SIZE * 8) 137 #endif 138 139 /* 140 * Mach derived constants 141 */ 142 143 /* user/kernel map constants */ 144 #define VM_MIN_ADDRESS ((vaddr_t)0x00000000) 145 #define VM_MAXUSER_ADDRESS ((vaddr_t)0x80000000) 146 #define VM_MAX_ADDRESS ((vaddr_t)0x80000000) 147 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xC0000000) 148 #ifdef ENABLE_MIPS_TX3900 149 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFF000000) 150 #else 151 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFC000) 152 #endif 153 154 /* 155 * The address to which unspecified mapping requests default 156 */ 157 #define __USE_TOPDOWN_VM 158 #define VM_DEFAULT_ADDRESS(da, sz) \ 159 trunc_page(USRSTACK - MAXSSIZ - (sz)) 160 161 /* virtual sizes (bytes) for various kernel submaps */ 162 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 163 164 /* VM_PHYSSEG_MAX defined by platform-dependent code. */ 165 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 166 #define VM_PHYSSEG_NOADD /* can add RAM after vm_mem_init */ 167 168 #define __HAVE_VM_PAGE_MD 169 170 /* 171 * pmap-specific data stored in the vm_page structure. 172 */ 173 struct vm_page_md { 174 struct pv_entry *pvh_list; /* pv_entry list */ 175 u_int pvh_attrs; /* page attributes */ 176 }; 177 178 #define VM_MDPAGE_INIT(pg) \ 179 do { \ 180 (pg)->mdpage.pvh_list = NULL; \ 181 } while (/* CONSTCOND */ 0) 182 183 #endif /* ! _MIPS_VMPARAM_H_ */ 184