vmparam.h revision 1.25
1 /* $NetBSD: vmparam.h,v 1.25 2003/08/07 16:28:41 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1982, 1986, 1990, 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. 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) 4/19/94 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. 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) 4/19/94 77 */ 78 79 #ifndef _MVME68K_VMPARAM_H_ 80 #define _MVME68K_VMPARAM_H_ 81 82 /* 83 * Machine dependent constants for MVME68K 84 */ 85 86 /* 87 * We use 4K pages on the mvme68k. Override the PAGE_* definitions 88 * to be 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 * Need a small pager map for the benefit of low-memory models. 96 * To avoid using a needlessly small value on larger memory models, 97 * this is calculated at runtime. 98 */ 99 #ifndef PAGER_MAP_SIZE 100 extern int mvme68k_pager_map_size; 101 #define PAGER_MAP_SIZE ((vsize_t) mvme68k_pager_map_size) 102 #endif 103 104 /* 105 * USRSTACK is the top (end) of the user stack. 106 * 107 * NOTE: the ONLY reason that HIGHPAGES is 0x100 instead of UPAGES (3) 108 * is for HPUX compatibility. Why?? Because HPUX's debuggers 109 * have the user's stack hard-wired at FFF00000 for post-mortems, 110 * and we must be compatible... 111 */ 112 #define USRSTACK (-HIGHPAGES*PAGE_SIZE) /* Start of user stack */ 113 #define BTOPUSRSTACK (0x100000-HIGHPAGES) /* btop(USRSTACK) */ 114 #define P1PAGES 0x100000 115 #define HIGHPAGES (0x100000/PAGE_SIZE) 116 117 /* 118 * Virtual memory related constants, all in bytes 119 */ 120 #ifndef MAXTSIZ 121 #define MAXTSIZ (8*1024*1024) /* max text size */ 122 #endif 123 #ifndef DFLDSIZ 124 #define DFLDSIZ (32*1024*1024) /* initial data size limit */ 125 #endif 126 #ifndef MAXDSIZ 127 #define MAXDSIZ (64*1024*1024) /* max data size */ 128 #endif 129 #ifndef DFLSSIZ 130 #define DFLSSIZ (512*1024) /* initial stack size limit */ 131 #endif 132 #ifndef MAXSSIZ 133 #define MAXSSIZ MAXDSIZ /* max stack size */ 134 #endif 135 136 /* 137 * Sizes of the system and user portions of the system page table. 138 */ 139 /* SYSPTSIZE IS SILLY; IT SHOULD BE COMPUTED AT BOOT TIME */ 140 #define SYSPTSIZE (2 * NPTEPG) /* 8mb */ 141 #define USRPTSIZE (1 * NPTEPG) /* 4mb */ 142 143 /* 144 * PTEs for mapping user space into the kernel for phyio operations. 145 * One page is enough to handle 4Mb of simultaneous raw IO operations. 146 */ 147 #ifndef USRIOSIZE 148 #define USRIOSIZE (1 * NPTEPG) /* 4mb */ 149 #endif 150 151 /* 152 * PTEs for system V style shared memory. 153 * This is basically slop for kmempt which we actually allocate (malloc) from. 154 */ 155 #ifndef SHMMAXPGS 156 #define SHMMAXPGS 1024 /* 4mb */ 157 #endif 158 159 /* 160 * Mach derived constants 161 */ 162 163 /* user/kernel map constants */ 164 #define VM_MIN_ADDRESS ((vaddr_t)0) 165 #define VM_MAXUSER_ADDRESS ((vaddr_t)0xFFF00000) 166 #define VM_MAX_ADDRESS ((vaddr_t)0xFFF00000) 167 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0) 168 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xFFFFF000) 169 170 /* virtual sizes (bytes) for various kernel submaps */ 171 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 172 173 /* # of kernel PT pages (initial only, can grow dynamically) */ 174 #define VM_KERNEL_PT_PAGES ((vsize_t)2) /* XXX: SYSPTSIZE */ 175 176 /* 177 * Constants which control the way the VM system deals with memory segments. 178 * The mvme68k port has two physical memory segments: 1 for onboard RAM 179 * and another for contiguous VMEbus RAM. 180 */ 181 #define VM_PHYSSEG_MAX 2 182 #define VM_PHYSSEG_STRAT VM_PSTRAT_RANDOM 183 #define VM_PHYSSEG_NOADD 184 185 #define VM_NFREELIST 2 186 #define VM_FREELIST_DEFAULT 0 187 #define VM_FREELIST_VMEMEM 1 188 189 #define __HAVE_PMAP_PHYSSEG 190 191 /* 192 * pmap-specific data stored in the vm_physmem[] array. 193 */ 194 struct pmap_physseg { 195 struct pv_entry *pvent; /* pv table for this seg */ 196 char *attrs; /* page attributes for this seg */ 197 }; 198 199 #endif /* _MVME68K_VMPARAM_H_ */ 200
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