vm_param.h revision 1817
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 * $Id$ 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 * This belongs in types.h, but breaks too many existing programs. 78 */ 79typedef int boolean_t; 80#define TRUE 1 81#define FALSE 0 82 83/* 84 * The machine independent pages are refered to as PAGES. A page 85 * is some number of hardware pages, depending on the target machine. 86 */ 87#define DEFAULT_PAGE_SIZE 4096 88 89#if 0 90 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#ifndef PAGE_SIZE 97#define PAGE_SIZE cnt.v_page_size /* size of page */ 98#endif 99#ifndef PAGE_MASK 100#define PAGE_MASK page_mask /* size of page - 1 */ 101#endif 102#ifndef PAGE_SHIFT 103#define PAGE_SHIFT page_shift /* bits to shift for pages */ 104#endif 105 106#endif 107 108#ifdef KERNEL 109extern vm_size_t page_mask; 110extern int page_shift; 111#endif 112 113/* 114 * CTL_VM identifiers 115 */ 116#define VM_METER 1 /* struct vmmeter */ 117#define VM_LOADAVG 2 /* struct loadavg */ 118#define VM_MAXID 3 /* number of valid vm ids */ 119 120#define CTL_VM_NAMES { \ 121 { 0, 0 }, \ 122 { "vmmeter", CTLTYPE_STRUCT }, \ 123 { "loadavg", CTLTYPE_STRUCT }, \ 124} 125 126/* 127 * Return values from the VM routines. 128 */ 129#define KERN_SUCCESS 0 130#define KERN_INVALID_ADDRESS 1 131#define KERN_PROTECTION_FAILURE 2 132#define KERN_NO_SPACE 3 133#define KERN_INVALID_ARGUMENT 4 134#define KERN_FAILURE 5 135#define KERN_RESOURCE_SHORTAGE 6 136#define KERN_NOT_RECEIVER 7 137#define KERN_NO_ACCESS 8 138 139#ifndef ASSEMBLER 140/* 141 * Convert addresses to pages and vice versa. 142 * No rounding is used. 143 */ 144#ifdef KERNEL 145 146#if 0 147 148#ifndef atop 149#define atop(x) (((unsigned)(x)) >> PAGE_SHIFT) 150#endif 151#ifndef ptoa 152#define ptoa(x) ((vm_offset_t)((x) << PAGE_SHIFT)) 153#endif 154 155/* 156 * Round off or truncate to the nearest page. These will work 157 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 158 */ 159#ifndef round_page 160#define round_page(x) \ 161 ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) & ~PAGE_MASK)) 162#endif 163#ifndef trunc_page 164#define trunc_page(x) \ 165 ((vm_offset_t)(((vm_offset_t)(x)) & ~PAGE_MASK)) 166#endif 167#ifndef num_pages 168#define num_pages(x) \ 169 ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT)) 170#endif 171 172#endif 173#define num_pages(x) \ 174 ((vm_offset_t)((((vm_offset_t)(x)) + PAGE_MASK) >> PAGE_SHIFT)) 175 176extern vm_size_t mem_size; /* size of physical memory (bytes) */ 177extern vm_offset_t first_addr; /* first physical page */ 178extern vm_offset_t last_addr; /* last physical page */ 179 180#else 181#if 0 182/* out-of-kernel versions of round_page and trunc_page */ 183#define round_page(x) \ 184 ((((vm_offset_t)(x) + (vm_page_size - 1)) / vm_page_size) * vm_page_size) 185#define trunc_page(x) \ 186 ((((vm_offset_t)(x)) / vm_page_size) * vm_page_size) 187#endif 188 189#endif /* KERNEL */ 190#endif /* ASSEMBLER */ 191#endif /* _VM_PARAM_ */ 192