1 /* $OpenBSD: uvm_param.h,v 1.14 2008/02/17 20:33:47 kettenis Exp $ */ 2 /* $NetBSD: uvm_param.h,v 1.5 2001/03/09 01:02:12 chs Exp $ */ 3 4 /* 5 * Copyright (c) 1991, 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 Mach Operating System project at Carnegie-Mellon University. 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 * @(#)vm_param.h 8.2 (Berkeley) 1/9/95 36 * 37 * 38 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 39 * All rights reserved. 40 * 41 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 42 * 43 * Permission to use, copy, modify and distribute this software and 44 * its documentation is hereby granted, provided that both the copyright 45 * notice and this permission notice appear in all copies of the 46 * software, derivative works or modified versions, and any portions 47 * thereof, and that both notices appear in supporting documentation. 48 * 49 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 50 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 51 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 52 * 53 * Carnegie Mellon requests users of this software to return to 54 * 55 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 56 * School of Computer Science 57 * Carnegie Mellon University 58 * Pittsburgh PA 15213-3890 59 * 60 * any improvements or extensions that they make and grant Carnegie the 61 * rights to redistribute these changes. 62 */ 63 64 /* 65 * Machine independent virtual memory parameters. 66 */ 67 68 #ifndef _VM_PARAM_ 69 #define _VM_PARAM_ 70 71 #include <machine/vmparam.h> 72 73 /* 74 * This belongs in types.h, but breaks too many existing programs. 75 */ 76 typedef int boolean_t; 77 #ifndef TRUE 78 #define TRUE 1 79 #endif 80 #ifndef FALSE 81 #define FALSE 0 82 #endif 83 84 /* 85 * The machine independent pages are referred to as PAGES. A page 86 * is some number of hardware pages, depending on the target machine. 87 */ 88 #define DEFAULT_PAGE_SIZE 4096 89 90 #if defined(_KERNEL) && !defined(PAGE_SIZE) 91 /* 92 * All references to the size of a page should be done with PAGE_SIZE 93 * or PAGE_SHIFT. The fact they are variables is hidden here so that 94 * we can easily make them constant if we so desire. 95 */ 96 #define PAGE_SIZE uvmexp.pagesize /* size of page */ 97 #define PAGE_MASK uvmexp.pagemask /* size of page - 1 */ 98 #define PAGE_SHIFT uvmexp.pageshift /* bits to shift for pages */ 99 #endif /* _KERNEL */ 100 101 /* 102 * CTL_VM identifiers 103 */ 104 #define VM_METER 1 /* struct vmmeter */ 105 #define VM_LOADAVG 2 /* struct loadavg */ 106 #define VM_PSSTRINGS 3 /* PSSTRINGS */ 107 #define VM_UVMEXP 4 /* struct uvmexp */ 108 #define VM_SWAPENCRYPT 5 /* int */ 109 #define VM_NKMEMPAGES 6 /* int - # kmem_map pages */ 110 #define VM_ANONMIN 7 111 #define VM_VTEXTMIN 8 112 #define VM_VNODEMIN 9 113 #define VM_MAXSLP 10 114 #define VM_USPACE 11 115 #define VM_KMPAGESFREE 12 116 #define VM_MAXID 13 /* number of valid vm ids */ 117 118 #define CTL_VM_NAMES { \ 119 { 0, 0 }, \ 120 { "vmmeter", CTLTYPE_STRUCT }, \ 121 { "loadavg", CTLTYPE_STRUCT }, \ 122 { "psstrings", CTLTYPE_STRUCT }, \ 123 { "uvmexp", CTLTYPE_STRUCT }, \ 124 { "swapencrypt", CTLTYPE_NODE }, \ 125 { "nkmempages", CTLTYPE_INT }, \ 126 { "anonmin", CTLTYPE_INT }, \ 127 { "vtextmin", CTLTYPE_INT }, \ 128 { "vnodemin", CTLTYPE_INT }, \ 129 { "maxslp", CTLTYPE_INT }, \ 130 { "uspace", CTLTYPE_INT }, \ 131 { "kmpagesfree", CTLTYPE_INT }, \ 132 } 133 134 struct _ps_strings { 135 void *val; 136 }; 137 138 #define SWAPSKIPBYTES 8192 /* never use at the start of a swap space */ 139 140 #ifndef ASSEMBLER 141 /* 142 * Convert addresses to pages and vice versa. 143 * No rounding is used. 144 */ 145 #ifdef _KERNEL 146 #define atop(x) ((x) >> PAGE_SHIFT) 147 #define ptoa(x) ((paddr_t)(x) << PAGE_SHIFT) 148 149 /* 150 * Round off or truncate to the nearest page. These will work 151 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 152 */ 153 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 154 #define trunc_page(x) ((x) & ~PAGE_MASK) 155 156 extern psize_t mem_size; /* size of physical memory (bytes) */ 157 #ifdef UBC 158 extern int ubc_nwins; /* number of UBC mapping windows */ 159 extern int ubc_winsize; /* size of a UBC mapping window */ 160 #endif 161 162 #else 163 /* out-of-kernel versions of round_page and trunc_page */ 164 #define round_page(x) \ 165 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ 166 vm_page_size) 167 #define trunc_page(x) \ 168 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) 169 170 #endif /* _KERNEL */ 171 #endif /* ASSEMBLER */ 172 #endif /* _VM_PARAM_ */ 173