| 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 | #define round_page(x) \ |
| 239 | ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ |
| 240 | vm_page_size) |
| 241 | #define trunc_page(x) \ |
| 242 | ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) |
| 243 | |
| 244 | #endif /* _KERNEL */ |
| 245 | |
| 246 | /* |
| 247 | * typedefs, necessary for standard UVM headers. |
| 248 | */ |
| 249 | |
| 250 | typedef unsigned int uvm_flag_t; |
| 251 | |
| 252 | typedef int vm_inherit_t; /* XXX: inheritance codes */ |
| 253 | typedef off_t voff_t; /* XXX: offset within a uvm_object */ |
| 254 | typedef voff_t pgoff_t; /* XXX: number of pages within a uvm object */ |
| 255 | |
| 256 | #endif /* ASSEMBLER */ |
| 257 | #endif /* _VM_PARAM_ */ |
| 258 | |