uvm_param.h revision 1.26
1 /* $NetBSD: uvm_param.h,v 1.26 2011/11/29 07:43:54 matt 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 (at) 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_uvm.h" 72 #endif 73 #ifdef _KERNEL 74 #include <sys/types.h> 75 #include <machine/vmparam.h> 76 #include <sys/resourcevar.h> 77 #endif 78 79 #if defined(_KERNEL) 80 81 #if defined(PAGE_SIZE) 82 83 /* 84 * If PAGE_SIZE is defined at this stage, it must be a constant. 85 */ 86 87 #if PAGE_SIZE == 0 88 #error Invalid PAGE_SIZE definition 89 #endif 90 91 /* 92 * If the platform does not need to support a variable PAGE_SIZE, 93 * then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE. 94 */ 95 96 #if !defined(MIN_PAGE_SIZE) 97 #define MIN_PAGE_SIZE PAGE_SIZE 98 #endif /* ! MIN_PAGE_SIZE */ 99 100 #if !defined(MAX_PAGE_SIZE) 101 #define MAX_PAGE_SIZE PAGE_SIZE 102 #endif /* ! MAX_PAGE_SIZE */ 103 104 #else /* ! PAGE_SIZE */ 105 106 /* 107 * PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must 108 * be defined. 109 */ 110 111 #if !defined(MIN_PAGE_SIZE) 112 #error MIN_PAGE_SIZE not defined 113 #endif 114 115 #if !defined(MAX_PAGE_SIZE) 116 #error MAX_PAGE_SIZE not defined 117 #endif 118 119 #endif /* PAGE_SIZE */ 120 121 /* 122 * MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants. 123 */ 124 125 #if MIN_PAGE_SIZE == 0 126 #error Invalid MIN_PAGE_SIZE definition 127 #endif 128 129 #if MAX_PAGE_SIZE == 0 130 #error Invalid MAX_PAGE_SIZE definition 131 #endif 132 133 /* 134 * If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use 135 * non-constant PAGE_SIZE, et al for LKMs. 136 */ 137 #if (MIN_PAGE_SIZE != MAX_PAGE_SIZE) && defined(_LKM) 138 #undef PAGE_SIZE 139 #undef PAGE_MASK 140 #undef PAGE_SHIFT 141 #endif 142 143 /* 144 * Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not 145 * have ones that are compile-time constants. 146 */ 147 #if !defined(PAGE_SIZE) 148 extern int *uvmexp_pagesize; 149 extern int *uvmexp_pagemask; 150 extern int *uvmexp_pageshift; 151 #define PAGE_SIZE (*uvmexp_pagesize) /* size of page */ 152 #define PAGE_MASK (*uvmexp_pagemask) /* size of page - 1 */ 153 #define PAGE_SHIFT (*uvmexp_pageshift) /* bits to shift for pages */ 154 #define __uvmexp_pagesize 155 #endif /* PAGE_SIZE */ 156 157 #endif /* _KERNEL */ 158 159 /* 160 * CTL_VM identifiers 161 */ 162 #define VM_METER 1 /* struct vmmeter */ 163 #define VM_LOADAVG 2 /* struct loadavg */ 164 #define VM_UVMEXP 3 /* struct uvmexp */ 165 #define VM_NKMEMPAGES 4 /* kmem_map pages */ 166 #define VM_UVMEXP2 5 /* struct uvmexp_sysctl */ 167 #define VM_ANONMIN 6 168 #define VM_EXECMIN 7 169 #define VM_FILEMIN 8 170 #define VM_MAXSLP 9 171 #define VM_USPACE 10 172 #define VM_ANONMAX 11 173 #define VM_EXECMAX 12 174 #define VM_FILEMAX 13 175 176 #define VM_MAXID 14 /* number of valid vm ids */ 177 178 #define CTL_VM_NAMES { \ 179 { 0, 0 }, \ 180 { "vmmeter", CTLTYPE_STRUCT }, \ 181 { "loadavg", CTLTYPE_STRUCT }, \ 182 { "uvmexp", CTLTYPE_STRUCT }, \ 183 { "nkmempages", CTLTYPE_INT }, \ 184 { "uvmexp2", CTLTYPE_STRUCT }, \ 185 { "anonmin", CTLTYPE_INT }, \ 186 { "execmin", CTLTYPE_INT }, \ 187 { "filemin", CTLTYPE_INT }, \ 188 { "maxslp", CTLTYPE_INT }, \ 189 { "uspace", CTLTYPE_INT }, \ 190 { "anonmax", CTLTYPE_INT }, \ 191 { "execmax", CTLTYPE_INT }, \ 192 { "filemax", CTLTYPE_INT }, \ 193 } 194 195 #ifndef ASSEMBLER 196 /* 197 * Convert addresses to pages and vice versa. 198 * No rounding is used. 199 */ 200 #ifdef _KERNEL 201 #define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT) 202 #define ptoa(x) (((paddr_t)(x)) << PAGE_SHIFT) 203 204 /* 205 * Round off or truncate to the nearest page. These will work 206 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 207 */ 208 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 209 #define trunc_page(x) ((x) & ~PAGE_MASK) 210 211 /* 212 * Set up the default mapping address (VM_DEFAULT_ADDRESS) according to: 213 * 214 * USE_TOPDOWN_VM: a kernel option to enable on a per-kernel basis 215 * which only be used on ports that define... 216 * __HAVE_TOPDOWN_VM: a per-port option to offer the topdown option 217 * 218 * __USE_TOPDOWN_VM: a per-port option to unconditionally use it 219 * 220 * if __USE_TOPDOWN_VM is defined, the port can specify a default vm 221 * address, or we will use the topdown default from below. If it is 222 * NOT defined, then the port can offer topdown as an option, but it 223 * MUST define the VM_DEFAULT_ADDRESS macro itself. 224 */ 225 #if defined(USE_TOPDOWN_VM) || defined(__USE_TOPDOWN_VM) 226 # if !defined(__HAVE_TOPDOWN_VM) && !defined(__USE_TOPDOWN_VM) 227 # error "Top down memory allocation not enabled for this system" 228 # else /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 229 # define __USING_TOPDOWN_VM 230 # if !defined(VM_DEFAULT_ADDRESS) 231 # if !defined(__USE_TOPDOWN_VM) 232 # error "Top down memory allocation not configured for this system" 233 # else /* !__USE_TOPDOWN_VM */ 234 # define VM_DEFAULT_ADDRESS(da, sz) \ 235 trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz)) 236 # endif /* !__USE_TOPDOWN_VM */ 237 # endif /* !VM_DEFAULT_ADDRESS */ 238 # endif /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 239 #endif /* USE_TOPDOWN_VM || __USE_TOPDOWN_VM */ 240 241 #if !defined(__USING_TOPDOWN_VM) 242 # if defined(VM_DEFAULT_ADDRESS) 243 # error "Default vm address should not be defined here" 244 # else /* VM_DEFAULT_ADDRESS */ 245 # define VM_DEFAULT_ADDRESS(da, sz) round_page((vaddr_t)(da) + (vsize_t)maxdmap) 246 # endif /* VM_DEFAULT_ADDRESS */ 247 #endif /* !__USING_TOPDOWN_VM */ 248 249 extern int ubc_nwins; /* number of UBC mapping windows */ 250 extern int ubc_winshift; /* shift for a UBC mapping window */ 251 extern u_int uvm_emap_size; /* size of emap */ 252 253 #else 254 /* out-of-kernel versions of round_page and trunc_page */ 255 #define round_page(x) \ 256 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ 257 vm_page_size) 258 #define trunc_page(x) \ 259 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) 260 261 #endif /* _KERNEL */ 262 #endif /* ASSEMBLER */ 263 #endif /* _VM_PARAM_ */ 264
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