1 /* $NetBSD: uvm_param.h,v 1.35 2015/09/26 20:28:38 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1991, 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 Mach Operating System project at Carnegie-Mellon University. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)vm_param.h 8.2 (Berkeley) 1/9/95 35 * 36 * 37 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 38 * All rights reserved. 39 * 40 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 41 * 42 * Permission to use, copy, modify and distribute this software and 43 * its documentation is hereby granted, provided that both the copyright 44 * notice and this permission notice appear in all copies of the 45 * software, derivative works or modified versions, and any portions 46 * thereof, and that both notices appear in supporting documentation. 47 * 48 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 49 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 50 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 51 * 52 * Carnegie Mellon requests users of this software to return to 53 * 54 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 55 * School of Computer Science 56 * Carnegie Mellon University 57 * Pittsburgh PA 15213-3890 58 * 59 * any improvements or extensions that they make and grant Carnegie the 60 * rights to redistribute these changes. 61 */ 62 63 /* 64 * Machine independent virtual memory parameters. 65 */ 66 67 #ifndef _VM_PARAM_ 68 #define _VM_PARAM_ 69 70 #ifdef _KERNEL_OPT 71 #include "opt_modular.h" 72 #include "opt_uvm.h" 73 #endif 74 #ifdef _KERNEL 75 #include <sys/types.h> 76 #include <machine/vmparam.h> 77 #include <sys/resourcevar.h> 78 #endif 79 80 #if defined(_KERNEL) 81 82 #if defined(PAGE_SIZE) 83 84 /* 85 * If PAGE_SIZE is defined at this stage, it must be a constant. 86 */ 87 88 #if PAGE_SIZE == 0 89 #error Invalid PAGE_SIZE definition 90 #endif 91 92 /* 93 * If the platform does not need to support a variable PAGE_SIZE, 94 * then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE. 95 */ 96 97 #if !defined(MIN_PAGE_SIZE) 98 #define MIN_PAGE_SIZE PAGE_SIZE 99 #endif /* ! MIN_PAGE_SIZE */ 100 101 #if !defined(MAX_PAGE_SIZE) 102 #define MAX_PAGE_SIZE PAGE_SIZE 103 #endif /* ! MAX_PAGE_SIZE */ 104 105 #else /* ! PAGE_SIZE */ 106 107 /* 108 * PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must 109 * be defined. 110 */ 111 112 #if !defined(MIN_PAGE_SIZE) 113 #error MIN_PAGE_SIZE not defined 114 #endif 115 116 #if !defined(MAX_PAGE_SIZE) 117 #error MAX_PAGE_SIZE not defined 118 #endif 119 120 #endif /* PAGE_SIZE */ 121 122 /* 123 * MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants. 124 */ 125 126 #if MIN_PAGE_SIZE == 0 127 #error Invalid MIN_PAGE_SIZE definition 128 #endif 129 130 #if MAX_PAGE_SIZE == 0 131 #error Invalid MAX_PAGE_SIZE definition 132 #endif 133 134 /* 135 * If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use 136 * non-constant PAGE_SIZE, et al for LKMs. 137 */ 138 #if (MIN_PAGE_SIZE != MAX_PAGE_SIZE) 139 #define __uvmexp_pagesize 140 #if defined(_LKM) || defined(_MODULE) 141 #undef PAGE_SIZE 142 #undef PAGE_MASK 143 #undef PAGE_SHIFT 144 #endif 145 #endif 146 147 /* 148 * Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not 149 * have ones that are compile-time constants. 150 */ 151 #if !defined(PAGE_SIZE) 152 extern const int *const uvmexp_pagesize; 153 extern const int *const uvmexp_pagemask; 154 extern const int *const uvmexp_pageshift; 155 #define PAGE_SIZE (*uvmexp_pagesize) /* size of page */ 156 #define PAGE_MASK (*uvmexp_pagemask) /* size of page - 1 */ 157 #define PAGE_SHIFT (*uvmexp_pageshift) /* bits to shift for pages */ 158 #endif /* PAGE_SIZE */ 159 160 #endif /* _KERNEL */ 161 162 /* 163 * CTL_VM identifiers 164 */ 165 #define VM_METER 1 /* struct vmmeter */ 166 #define VM_LOADAVG 2 /* struct loadavg */ 167 #define VM_UVMEXP 3 /* struct uvmexp */ 168 #define VM_NKMEMPAGES 4 /* kmem_map pages */ 169 #define VM_UVMEXP2 5 /* struct uvmexp_sysctl */ 170 #define VM_ANONMIN 6 171 #define VM_EXECMIN 7 172 #define VM_FILEMIN 8 173 #define VM_MAXSLP 9 174 #define VM_USPACE 10 175 #define VM_ANONMAX 11 176 #define VM_EXECMAX 12 177 #define VM_FILEMAX 13 178 #define VM_MINADDRESS 14 179 #define VM_MAXADDRESS 15 180 #define VM_PROC 16 /* process information */ 181 182 #define VM_MAXID 17 /* number of valid vm ids */ 183 184 #define VM_PROC_MAP 1 /* struct kinfo_vmentry */ 185 186 #define CTL_VM_NAMES { \ 187 { 0, 0 }, \ 188 { "vmmeter", CTLTYPE_STRUCT }, \ 189 { "loadavg", CTLTYPE_STRUCT }, \ 190 { "uvmexp", CTLTYPE_STRUCT }, \ 191 { "nkmempages", CTLTYPE_INT }, \ 192 { "uvmexp2", CTLTYPE_STRUCT }, \ 193 { "anonmin", CTLTYPE_INT }, \ 194 { "execmin", CTLTYPE_INT }, \ 195 { "filemin", CTLTYPE_INT }, \ 196 { "maxslp", CTLTYPE_INT }, \ 197 { "uspace", CTLTYPE_INT }, \ 198 { "anonmax", CTLTYPE_INT }, \ 199 { "execmax", CTLTYPE_INT }, \ 200 { "filemax", CTLTYPE_INT }, \ 201 { "minaddress", CTLTYPE_LONG }, \ 202 { "maxaddress", CTLTYPE_LONG }, \ 203 { "proc", CTLTYPE_STRUCT }, \ 204 } 205 206 #ifndef ASSEMBLER 207 /* 208 * Convert addresses to pages and vice versa. 209 * No rounding is used. 210 */ 211 #ifdef _KERNEL 212 #define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT) 213 #define ptoa(x) (((paddr_t)(x)) << PAGE_SHIFT) 214 215 /* 216 * Round off or truncate to the nearest page. These will work 217 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 218 */ 219 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 220 #define trunc_page(x) ((x) & ~PAGE_MASK) 221 222 #ifndef VM_DEFAULT_ADDRESS_BOTTOMUP 223 #define VM_DEFAULT_ADDRESS_BOTTOMUP(da, sz) \ 224 round_page((vaddr_t)(da) + (vsize_t)maxdmap) 225 #endif 226 227 #ifndef VM_DEFAULT_ADDRESS_TOPDOWN 228 #define VM_DEFAULT_ADDRESS_TOPDOWN(da, sz) \ 229 trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz)) 230 #endif 231 232 extern int ubc_nwins; /* number of UBC mapping windows */ 233 extern int ubc_winshift; /* shift for a UBC mapping window */ 234 extern u_int uvm_emap_size; /* size of emap */ 235 236 #else 237 /* out-of-kernel versions of round_page and trunc_page */ 238 #if !defined(__minix) 239 #define round_page(x) \ 240 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ 241 vm_page_size) 242 #define trunc_page(x) \ 243 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) 244 #else 245 /* LSC: Minix always uses the same definition of those. */ 246 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 247 #define trunc_page(x) ((x) & ~PAGE_MASK) 248 #endif /* !defined(__minix) */ 249 250 #endif /* _KERNEL */ 251 252 /* 253 * typedefs, necessary for standard UVM headers. 254 */ 255 256 typedef unsigned int uvm_flag_t; 257 258 typedef int vm_inherit_t; /* XXX: inheritance codes */ 259 typedef off_t voff_t; /* XXX: offset within a uvm_object */ 260 typedef voff_t pgoff_t; /* XXX: number of pages within a uvm object */ 261 262 #endif /* ASSEMBLER */ 263 #endif /* _VM_PARAM_ */ 264