1 /* $NetBSD: uvm_param.h,v 1.31 2012/03/19 00:17:08 uebayasi 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 13 178 179 #define VM_MAXID 14 /* number of valid vm ids */ 180 181 #define CTL_VM_NAMES { \ 182 { 0, 0 }, \ 183 { "vmmeter", CTLTYPE_STRUCT }, \ 184 { "loadavg", CTLTYPE_STRUCT }, \ 185 { "uvmexp", CTLTYPE_STRUCT }, \ 186 { "nkmempages", CTLTYPE_INT }, \ 187 { "uvmexp2", CTLTYPE_STRUCT }, \ 188 { "anonmin", CTLTYPE_INT }, \ 189 { "execmin", CTLTYPE_INT }, \ 190 { "filemin", CTLTYPE_INT }, \ 191 { "maxslp", CTLTYPE_INT }, \ 192 { "uspace", CTLTYPE_INT }, \ 193 { "anonmax", CTLTYPE_INT }, \ 194 { "execmax", CTLTYPE_INT }, \ 195 { "filemax", CTLTYPE_INT }, \ 196 } 197 198 #ifndef ASSEMBLER 199 /* 200 * Convert addresses to pages and vice versa. 201 * No rounding is used. 202 */ 203 #ifdef _KERNEL 204 #define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT) 205 #define ptoa(x) (((paddr_t)(x)) << PAGE_SHIFT) 206 207 /* 208 * Round off or truncate to the nearest page. These will work 209 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 210 */ 211 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 212 #define trunc_page(x) ((x) & ~PAGE_MASK) 213 214 /* 215 * Set up the default mapping address (VM_DEFAULT_ADDRESS) according to: 216 * 217 * USE_TOPDOWN_VM: a kernel option to enable on a per-kernel basis 218 * which only be used on ports that define... 219 * __HAVE_TOPDOWN_VM: a per-port option to offer the topdown option 220 * 221 * __USE_TOPDOWN_VM: a per-port option to unconditionally use it 222 * 223 * if __USE_TOPDOWN_VM is defined, the port can specify a default vm 224 * address, or we will use the topdown default from below. If it is 225 * NOT defined, then the port can offer topdown as an option, but it 226 * MUST define the VM_DEFAULT_ADDRESS macro itself. 227 */ 228 #if defined(USE_TOPDOWN_VM) || defined(__USE_TOPDOWN_VM) 229 # if !defined(__HAVE_TOPDOWN_VM) && !defined(__USE_TOPDOWN_VM) 230 # error "Top down memory allocation not enabled for this system" 231 # else /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 232 # define __USING_TOPDOWN_VM 233 # if !defined(VM_DEFAULT_ADDRESS) 234 # if !defined(__USE_TOPDOWN_VM) 235 # error "Top down memory allocation not configured for this system" 236 # else /* !__USE_TOPDOWN_VM */ 237 # define VM_DEFAULT_ADDRESS(da, sz) \ 238 trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz)) 239 # endif /* !__USE_TOPDOWN_VM */ 240 # endif /* !VM_DEFAULT_ADDRESS */ 241 # endif /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 242 #endif /* USE_TOPDOWN_VM || __USE_TOPDOWN_VM */ 243 244 #if !defined(__USING_TOPDOWN_VM) 245 # if defined(VM_DEFAULT_ADDRESS) 246 # error "Default vm address should not be defined here" 247 # else /* VM_DEFAULT_ADDRESS */ 248 # define VM_DEFAULT_ADDRESS(da, sz) round_page((vaddr_t)(da) + (vsize_t)maxdmap) 249 # endif /* VM_DEFAULT_ADDRESS */ 250 #endif /* !__USING_TOPDOWN_VM */ 251 252 extern int ubc_nwins; /* number of UBC mapping windows */ 253 extern int ubc_winshift; /* shift for a UBC mapping window */ 254 extern u_int uvm_emap_size; /* size of emap */ 255 256 #else 257 /* out-of-kernel versions of round_page and trunc_page */ 258 #if !defined(__minix) 259 #define round_page(x) \ 260 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ 261 vm_page_size) 262 #define trunc_page(x) \ 263 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) 264 #else 265 /* LSC: Minix always uses the same definition of those. */ 266 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 267 #define trunc_page(x) ((x) & ~PAGE_MASK) 268 #endif /* !defined(__minix) */ 269 270 #endif /* _KERNEL */ 271 272 /* 273 * typedefs, necessary for standard UVM headers. 274 */ 275 276 typedef unsigned int uvm_flag_t; 277 278 typedef int vm_inherit_t; /* XXX: inheritance codes */ 279 typedef off_t voff_t; /* XXX: offset within a uvm_object */ 280 typedef voff_t pgoff_t; /* XXX: number of pages within a uvm object */ 281 282 #endif /* ASSEMBLER */ 283 #endif /* _VM_PARAM_ */ 284