vm_param.h revision 16750
1/* 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * The Mach Operating System project at Carnegie-Mellon University. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)vm_param.h 8.1 (Berkeley) 6/11/93 37 * 38 * 39 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 40 * All rights reserved. 41 * 42 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 43 * 44 * Permission to use, copy, modify and distribute this software and 45 * its documentation is hereby granted, provided that both the copyright 46 * notice and this permission notice appear in all copies of the 47 * software, derivative works or modified versions, and any portions 48 * thereof, and that both notices appear in supporting documentation. 49 * 50 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 51 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 52 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 53 * 54 * Carnegie Mellon requests users of this software to return to 55 * 56 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 57 * School of Computer Science 58 * Carnegie Mellon University 59 * Pittsburgh PA 15213-3890 60 * 61 * any improvements or extensions that they make and grant Carnegie the 62 * rights to redistribute these changes. 63 * 64 * $Id: vm_param.h,v 1.5 1995/12/10 02:34:29 bde Exp $ 65 */ 66 67/* 68 * Machine independent virtual memory parameters. 69 */ 70 71#ifndef _VM_PARAM_ 72#define _VM_PARAM_ 73 74#include <machine/vmparam.h> 75 76/* 77 * The machine independent pages are refered to as PAGES. A page 78 * is some number of hardware pages, depending on the target machine. 79 */ 80#define DEFAULT_PAGE_SIZE 4096 81 82#if 0 83 84/* 85 * All references to the size of a page should be done with PAGE_SIZE 86 * or PAGE_SHIFT. The fact they are variables is hidden here so that 87 * we can easily make them constant if we so desire. 88 */ 89#ifndef PAGE_SIZE 90#define PAGE_SIZE cnt.v_page_size /* size of page */ 91#endif 92#ifndef PAGE_MASK 93#define PAGE_MASK page_mask /* size of page - 1 */ 94#endif 95#ifndef PAGE_SHIFT 96#define PAGE_SHIFT page_shift /* bits to shift for pages */ 97#endif 98 99#endif 100 101#ifdef KERNEL 102extern vm_size_t page_mask; 103extern int page_shift; 104 105#endif 106 107/* 108 * CTL_VM identifiers 109 */ 110#define VM_METER 1 /* struct vmmeter */ 111#define VM_LOADAVG 2 /* struct loadavg */ 112#define VM_V_FREE_MIN 3 /* cnt.v_free_min */ 113#define VM_V_FREE_TARGET 4 /* cnt.v_free_target */ 114#define VM_V_FREE_RESERVED 5 /* cnt.v_free_reserved */ 115#define VM_V_INACTIVE_TARGET 6 /* cnt.v_inactive_target */ 116#define VM_V_CACHE_MIN 7 /* cnt.v_cache_max */ 117#define VM_V_CACHE_MAX 8 /* cnt.v_cache_min */ 118#define VM_V_PAGEOUT_FREE_MIN 9 /* cnt.v_pageout_free_min */ 119#define VM_PAGEOUT_ALGORITHM 10 /* pageout algorithm */ 120#define VM_SWAPPING_ENABLED 11 /* swapping enabled */ 121#define VM_MAXID 12 /* number of valid vm ids */ 122 123#define CTL_VM_NAMES { \ 124 { 0, 0 }, \ 125 { "vmmeter", CTLTYPE_STRUCT }, \ 126 { "loadavg", CTLTYPE_STRUCT }, \ 127 { "v_free_min", CTLTYPE_INT }, \ 128 { "v_free_target", CTLTYPE_INT }, \ 129 { "v_free_reserved", CTLTYPE_INT }, \ 130 { "v_inactive_target", CTLTYPE_INT }, \ 131 { "v_cache_min", CTLTYPE_INT }, \ 132 { "v_cache_max", CTLTYPE_INT }, \ 133 { "v_pageout_free_min", CTLTYPE_INT}, \ 134 { "pageout_algorithm", CTLTYPE_INT}, \ 135 { "swapping_enabled", CTLTYPE_INT},\ 136} 137 138/* 139 * Return values from the VM routines. 140 */ 141#define KERN_SUCCESS 0 142#define KERN_INVALID_ADDRESS 1 143#define KERN_PROTECTION_FAILURE 2 144#define KERN_NO_SPACE 3 145#define KERN_INVALID_ARGUMENT 4 146#define KERN_FAILURE 5 147#define KERN_RESOURCE_SHORTAGE 6 148#define KERN_NOT_RECEIVER 7 149#define KERN_NO_ACCESS 8 150 151#ifndef ASSEMBLER 152/* 153 * Convert addresses to pages and vice versa. 154 * No rounding is used. 155 */ 156#ifdef KERNEL 157#define num_pages(x) \ 158 ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT)) 159 160extern vm_size_t mem_size; /* size of physical memory (bytes) */ 161extern vm_offset_t first_addr; /* first physical page */ 162extern vm_offset_t last_addr; /* last physical page */ 163#endif /* KERNEL */ 164#endif /* ASSEMBLER */ 165#endif /* _VM_PARAM_ */ 166