uvm_param.h revision 1.17
1 /* $NetBSD: uvm_param.h,v 1.17 2003/04/19 21:42:47 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. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)vm_param.h 8.2 (Berkeley) 1/9/95 39 * 40 * 41 * Copyright (c) 1987, 1990 Carnegie-Mellon University. 42 * All rights reserved. 43 * 44 * Authors: Avadis Tevanian, Jr., Michael Wayne Young 45 * 46 * Permission to use, copy, modify and distribute this software and 47 * its documentation is hereby granted, provided that both the copyright 48 * notice and this permission notice appear in all copies of the 49 * software, derivative works or modified versions, and any portions 50 * thereof, and that both notices appear in supporting documentation. 51 * 52 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 53 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 54 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 55 * 56 * Carnegie Mellon requests users of this software to return to 57 * 58 * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 59 * School of Computer Science 60 * Carnegie Mellon University 61 * Pittsburgh PA 15213-3890 62 * 63 * any improvements or extensions that they make and grant Carnegie the 64 * rights to redistribute these changes. 65 */ 66 67 /* 68 * Machine independent virtual memory parameters. 69 */ 70 71 #ifndef _VM_PARAM_ 72 #define _VM_PARAM_ 73 74 #ifdef _KERNEL_OPT 75 #include "opt_uvm.h" 76 #endif 77 #ifdef _KERNEL 78 #include <machine/vmparam.h> 79 #endif 80 81 #if defined(_KERNEL) 82 83 #if defined(PAGE_SIZE) 84 85 /* 86 * If PAGE_SIZE is defined at this stage, it must be a constant. 87 */ 88 89 #if PAGE_SIZE == 0 90 #error Invalid PAGE_SIZE definition 91 #endif 92 93 /* 94 * If the platform does not need to support a variable PAGE_SIZE, 95 * then provide default values for MIN_PAGE_SIZE and MAX_PAGE_SIZE. 96 */ 97 98 #if !defined(MIN_PAGE_SIZE) 99 #define MIN_PAGE_SIZE PAGE_SIZE 100 #endif /* ! MIN_PAGE_SIZE */ 101 102 #if !defined(MAX_PAGE_SIZE) 103 #define MAX_PAGE_SIZE PAGE_SIZE 104 #endif /* ! MAX_PAGE_SIZE */ 105 106 #else /* ! PAGE_SIZE */ 107 108 /* 109 * PAGE_SIZE is not a constant; MIN_PAGE_SIZE and MAX_PAGE_SIZE must 110 * be defined. 111 */ 112 113 #if !defined(MIN_PAGE_SIZE) 114 #error MIN_PAGE_SIZE not defined 115 #endif 116 117 #if !defined(MAX_PAGE_SIZE) 118 #error MAX_PAGE_SIZE not defined 119 #endif 120 121 #endif /* PAGE_SIZE */ 122 123 /* 124 * MIN_PAGE_SIZE and MAX_PAGE_SIZE must be constants. 125 */ 126 127 #if MIN_PAGE_SIZE == 0 128 #error Invalid MIN_PAGE_SIZE definition 129 #endif 130 131 #if MAX_PAGE_SIZE == 0 132 #error Invalid MAX_PAGE_SIZE definition 133 #endif 134 135 /* 136 * If MIN_PAGE_SIZE and MAX_PAGE_SIZE are not equal, then we must use 137 * non-constant PAGE_SIZE, et al for LKMs. 138 */ 139 #if (MIN_PAGE_SIZE != MAX_PAGE_SIZE) && defined(_LKM) 140 #undef PAGE_SIZE 141 #undef PAGE_MASK 142 #undef PAGE_SHIFT 143 #endif 144 145 /* 146 * Now provide PAGE_SIZE, PAGE_MASK, and PAGE_SHIFT if we do not 147 * have ones that are compile-time constants. 148 */ 149 #if !defined(PAGE_SIZE) 150 #define PAGE_SIZE uvmexp.pagesize /* size of page */ 151 #define PAGE_MASK uvmexp.pagemask /* size of page - 1 */ 152 #define PAGE_SHIFT uvmexp.pageshift /* bits to shift for pages */ 153 #endif /* PAGE_SIZE */ 154 155 #endif /* _KERNEL */ 156 157 /* 158 * CTL_VM identifiers 159 */ 160 #define VM_METER 1 /* struct vmmeter */ 161 #define VM_LOADAVG 2 /* struct loadavg */ 162 #define VM_UVMEXP 3 /* struct uvmexp */ 163 #define VM_NKMEMPAGES 4 /* kmem_map pages */ 164 #define VM_UVMEXP2 5 /* struct uvmexp_sysctl */ 165 #define VM_ANONMIN 6 166 #define VM_EXECMIN 7 167 #define VM_FILEMIN 8 168 #define VM_MAXSLP 9 169 #define VM_USPACE 10 170 #define VM_ANONMAX 11 171 #define VM_EXECMAX 12 172 #define VM_FILEMAX 13 173 174 #define VM_MAXID 14 /* number of valid vm ids */ 175 176 #define CTL_VM_NAMES { \ 177 { 0, 0 }, \ 178 { "vmmeter", CTLTYPE_STRUCT }, \ 179 { "loadavg", CTLTYPE_STRUCT }, \ 180 { "uvmexp", CTLTYPE_STRUCT }, \ 181 { "nkmempages", CTLTYPE_INT }, \ 182 { "uvmexp2", CTLTYPE_STRUCT }, \ 183 { "anonmin", CTLTYPE_INT }, \ 184 { "execmin", CTLTYPE_INT }, \ 185 { "filemin", CTLTYPE_INT }, \ 186 { "maxslp", CTLTYPE_INT }, \ 187 { "uspace", CTLTYPE_INT }, \ 188 { "anonmax", CTLTYPE_INT }, \ 189 { "execmax", CTLTYPE_INT }, \ 190 { "filemax", CTLTYPE_INT }, \ 191 } 192 193 #ifndef ASSEMBLER 194 /* 195 * Convert addresses to pages and vice versa. 196 * No rounding is used. 197 */ 198 #ifdef _KERNEL 199 #define atop(x) (((paddr_t)(x)) >> PAGE_SHIFT) 200 #define ptoa(x) ((vaddr_t)((vaddr_t)(x) << PAGE_SHIFT)) 201 202 /* 203 * Round off or truncate to the nearest page. These will work 204 * for either addresses or counts (i.e., 1 byte rounds to 1 page). 205 */ 206 #define round_page(x) (((x) + PAGE_MASK) & ~PAGE_MASK) 207 #define trunc_page(x) ((x) & ~PAGE_MASK) 208 209 /* 210 * Set up the default mapping address (VM_DEFAULT_ADDRESS) according to: 211 * 212 * USE_TOPDOWN_VM: a kernel option to enable on a per-kernel basis 213 * which only be used on ports that define... 214 * __HAVE_TOPDOWN_VM: a per-port option to offer the topdown option 215 * 216 * __USE_TOPDOWN_VM: a per-port option to unconditionally use it 217 * 218 * if __USE_TOPDOWN_VM is defined, the port can specify a default vm 219 * address, or we will use the topdown default from below. If it is 220 * NOT defined, then the port can offer topdown as an option, but it 221 * MUST define the VM_DEFAULT_ADDRESS macro itself. 222 */ 223 #if defined(USE_TOPDOWN_VM) || defined(__USE_TOPDOWN_VM) 224 # if !defined(__HAVE_TOPDOWN_VM) && !defined(__USE_TOPDOWN_VM) 225 # error "Top down memory allocation not enabled for this system" 226 # else /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 227 # define __USING_TOPDOWN_VM 228 # if !defined(VM_DEFAULT_ADDRESS) 229 # if !defined(__USE_TOPDOWN_VM) 230 # error "Top down memory allocation not configured for this system" 231 # else /* !__USE_TOPDOWN_VM */ 232 # define VM_DEFAULT_ADDRESS(da, sz) \ 233 trunc_page(VM_MAXUSER_ADDRESS - MAXSSIZ - (sz)) 234 # endif /* !__USE_TOPDOWN_VM */ 235 # endif /* !VM_DEFAULT_ADDRESS */ 236 # endif /* !__HAVE_TOPDOWN_VM && !__USE_TOPDOWN_VM */ 237 #endif /* USE_TOPDOWN_VM || __USE_TOPDOWN_VM */ 238 239 #if !defined(__USING_TOPDOWN_VM) 240 # if defined(VM_DEFAULT_ADDRESS) 241 # error "Default vm address should not be defined here" 242 # else /* VM_DEFAULT_ADDRESS */ 243 # define VM_DEFAULT_ADDRESS(da, sz) round_page((vaddr_t)(da) + MAXDSIZ) 244 # endif /* VM_DEFAULT_ADDRESS */ 245 #endif /* !__USING_TOPDOWN_VM */ 246 247 extern int ubc_nwins; /* number of UBC mapping windows */ 248 extern int ubc_winshift; /* shift for a UBC mapping window */ 249 250 #else 251 /* out-of-kernel versions of round_page and trunc_page */ 252 #define round_page(x) \ 253 ((((vaddr_t)(x) + (vm_page_size - 1)) / vm_page_size) * \ 254 vm_page_size) 255 #define trunc_page(x) \ 256 ((((vaddr_t)(x)) / vm_page_size) * vm_page_size) 257 258 #endif /* _KERNEL */ 259 #endif /* ASSEMBLER */ 260 #endif /* _VM_PARAM_ */ 261
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