1 /* $OpenBSD: vmparam.h,v 1.16 2008/08/22 10:41:37 kurt Exp $ */ 2 /* $NetBSD: vmparam.h,v 1.5 1994/10/26 21:10:10 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1988 University of Utah. 6 * Copyright (c) 1992, 1993 7 * The Regents of the University of California. All rights reserved. 8 * 9 * This code is derived from software contributed to Berkeley by 10 * the Systems Programming Group of the University of Utah Computer 11 * Science Department and Ralph Campbell. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: Utah Hdr: vmparam.h 1.16 91/01/18 38 * @(#)vmparam.h 8.2 (Berkeley) 4/22/94 39 */ 40 41 #ifndef _MIPS_VMPARAM_H_ 42 #define _MIPS_VMPARAM_H_ 43 44 /* 45 * Machine dependent constants mips processors. 46 */ 47 /* 48 * USRTEXT is the start of the user text/data space, while USRSTACK 49 * is the top (end) of the user stack. 50 */ 51 #define USRTEXT 0x0000000000400000L 52 #define USRSTACK 0x0000000080000000L /* Start of user stack */ 53 54 /* 55 * Virtual memory related constants, all in bytes 56 */ 57 #ifndef MAXTSIZ 58 #define MAXTSIZ (64*1024*1024) /* max text size */ 59 #endif 60 #ifndef DFLDSIZ 61 #define DFLDSIZ (128*1024*1024) /* initial data size limit */ 62 #endif 63 #ifndef MAXDSIZ 64 #define MAXDSIZ (1*1024*1024*1024) /* max data size */ 65 #endif 66 #ifndef DFLSSIZ 67 #define DFLSSIZ (2*1024*1024) /* initial stack size limit */ 68 #endif 69 #ifndef MAXSSIZ 70 #define MAXSSIZ (32*1024*1024) /* max stack size */ 71 #endif 72 73 #define STACKGAP_RANDOM 256*1024 74 75 /* 76 * PTEs for mapping user space into the kernel for physio operations. 77 * 16 pte's are enough to cover 8 disks * MAXBSIZE. 78 */ 79 #ifndef USRIOSIZE 80 #define USRIOSIZE 32 81 #endif 82 83 /* 84 * PTEs for system V style shared memory. 85 * This is basically slop for kmempt which we actually allocate (malloc) from. 86 */ 87 #ifndef SHMMAXPGS 88 #define SHMMAXPGS 8192 /* 8mb */ 89 #endif 90 91 #ifndef VM_PHYSSEG_MAX 92 #define VM_PHYSSEG_MAX 8 /* Max number of physical memory segments */ 93 #endif 94 #define VM_PHYSSEG_STRAT VM_PSTRAT_BSEARCH 95 #define VM_PHYSSEG_NOADD 96 97 /* user/kernel map constants */ 98 #define VM_MIN_ADDRESS ((vaddr_t)0x0000000000000000L) 99 #define VM_MAXUSER_ADDRESS ((vaddr_t)0x0000000080000000L) 100 #define VM_MAX_ADDRESS ((vaddr_t)0x0000000080000000L) 101 #define VM_MIN_KERNEL_ADDRESS ((vaddr_t)0xffffffffc0000000L) 102 #define VM_MAX_KERNEL_ADDRESS ((vaddr_t)0xfffffffffffff000L) 103 104 /* map PIE below 256MB (non-pie link address) to avoid mmap pressure */ 105 #define VM_PIE_MIN_ADDR PAGE_SIZE 106 #define VM_PIE_MAX_ADDR 0x10000000UL 107 108 #ifndef VM_NFREELIST 109 #define VM_NFREELIST 1 110 #endif 111 #define VM_FREELIST_DEFAULT 0 112 113 /* virtual sizes (bytes) for various kernel submaps */ 114 #define VM_PHYS_SIZE (USRIOSIZE*PAGE_SIZE) 115 116 #if defined(_KERNEL) && !defined(_LOCORE) 117 /* 118 * pmap-specific data 119 */ 120 121 /* XXX - belongs in pmap.h, but put here because of ordering issues */ 122 typedef struct pv_entry { 123 struct pv_entry *pv_next; /* next pv_entry */ 124 struct pmap *pv_pmap; /* pmap where mapping lies */ 125 vaddr_t pv_va; /* virtual address for mapping */ 126 } *pv_entry_t; 127 128 #define __HAVE_VM_PAGE_MD 129 struct vm_page_md { 130 struct pv_entry pv_ent; /* pv list of this seg */ 131 }; 132 133 #define VM_MDPAGE_INIT(pg) \ 134 do { \ 135 (pg)->mdpage.pv_ent.pv_next = NULL; \ 136 (pg)->mdpage.pv_ent.pv_pmap = NULL; \ 137 (pg)->mdpage.pv_ent.pv_va = 0; \ 138 } while (0) 139 140 #endif /* _KERNEL && !_LOCORE */ 141 142 #endif /* !_MIPS_VMPARAM_H_ */ 143