uvm.h revision 1.42
1 /* $NetBSD: uvm.h,v 1.42 2005/11/29 15:45:28 yamt Exp $ */ 2 3 /* 4 * 5 * Copyright (c) 1997 Charles D. Cranor and Washington University. 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Charles D. Cranor and 19 * Washington University. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 * 34 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 35 */ 36 37 #ifndef _UVM_UVM_H_ 38 #define _UVM_UVM_H_ 39 40 #if defined(_KERNEL_OPT) 41 #include "opt_lockdebug.h" 42 #include "opt_multiprocessor.h" 43 #include "opt_uvmhist.h" 44 #endif 45 46 #include <uvm/uvm_extern.h> 47 48 #include <uvm/uvm_stat.h> 49 50 /* 51 * pull in prototypes 52 */ 53 54 #include <uvm/uvm_amap.h> 55 #include <uvm/uvm_aobj.h> 56 #include <uvm/uvm_fault.h> 57 #include <uvm/uvm_glue.h> 58 #include <uvm/uvm_km.h> 59 #include <uvm/uvm_loan.h> 60 #include <uvm/uvm_map.h> 61 #include <uvm/uvm_object.h> 62 #include <uvm/uvm_page.h> 63 #include <uvm/uvm_pager.h> 64 #include <uvm/uvm_pdaemon.h> 65 #include <uvm/uvm_swap.h> 66 67 #ifdef _KERNEL 68 69 /* 70 * pull in VM_NFREELIST 71 */ 72 #include <machine/vmparam.h> 73 74 /* 75 * uvm structure (vm global state: collected in one structure for ease 76 * of reference...) 77 */ 78 79 struct uvm { 80 /* vm_page related parameters */ 81 82 /* vm_page queues */ 83 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 84 int page_free_nextcolor; /* next color to allocate from */ 85 struct pglist page_active; /* allocated pages, in use */ 86 struct pglist page_inactive; /* pages between the clock hands */ 87 struct simplelock pageqlock; /* lock for active/inactive page q */ 88 struct simplelock fpageqlock; /* lock for free page q */ 89 boolean_t page_init_done; /* TRUE if uvm_page_init() finished */ 90 boolean_t page_idle_zero; /* TRUE if we should try to zero 91 pages in the idle loop */ 92 93 /* page daemon trigger */ 94 int pagedaemon; /* daemon sleeps on this */ 95 struct proc *pagedaemon_proc; /* daemon's pid */ 96 struct simplelock pagedaemon_lock; 97 98 /* aiodone daemon trigger */ 99 int aiodoned; /* daemon sleeps on this */ 100 struct proc *aiodoned_proc; /* daemon's pid */ 101 struct simplelock aiodoned_lock; 102 103 /* page hash */ 104 struct pglist *page_hash; /* page hash table (vp/off->page) */ 105 int page_nhash; /* number of buckets */ 106 int page_hashmask; /* hash mask */ 107 struct simplelock hashlock; /* lock on page_hash array */ 108 109 struct simplelock kentry_lock; 110 111 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 112 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 113 114 /* swap-related items */ 115 struct simplelock swap_data_lock; 116 117 /* kernel object: to support anonymous pageable kernel memory */ 118 struct uvm_object *kernel_object; 119 }; 120 121 #endif /* _KERNEL */ 122 123 /* 124 * vm_map_entry etype bits: 125 */ 126 127 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 128 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 129 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 130 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 131 132 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 133 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 134 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 135 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 136 137 #ifdef _KERNEL 138 139 /* 140 * holds all the internal UVM data 141 */ 142 extern struct uvm uvm; 143 144 /* 145 * historys 146 */ 147 148 #ifdef UVMHIST 149 UVMHIST_DECL(maphist); 150 UVMHIST_DECL(pdhist); 151 UVMHIST_DECL(ubchist); 152 UVMHIST_DECL(loanhist); 153 #endif 154 155 extern struct evcnt uvm_ra_total; 156 extern struct evcnt uvm_ra_hit; 157 extern struct evcnt uvm_ra_miss; 158 159 /* 160 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 161 * interlocked tsleep() function. 162 */ 163 164 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 165 do { \ 166 (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 167 msg, timo, slock); \ 168 } while (/*CONSTCOND*/ 0) 169 170 /* 171 * UVM_KICK_PDAEMON: perform checks to determine if we need to 172 * give the pagedaemon a nudge, and do so if necessary. 173 */ 174 175 #define UVM_KICK_PDAEMON() \ 176 do { \ 177 if (uvmexp.free + uvmexp.paging < uvmexp.freemin || \ 178 (uvmexp.free + uvmexp.paging < uvmexp.freetarg && \ 179 uvmexp.inactive < uvmexp.inactarg)) { \ 180 wakeup(&uvm.pagedaemon); \ 181 } \ 182 } while (/*CONSTCOND*/0) 183 184 /* 185 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 186 */ 187 188 #if defined(UVM_PAGE_TRKOWN) 189 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 190 #else 191 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 192 #endif /* UVM_PAGE_TRKOWN */ 193 194 #endif /* _KERNEL */ 195 196 #endif /* _UVM_UVM_H_ */ 197 198 /* 199 * pull in inlines 200 */ 201 202 #ifdef _KERNEL 203 204 #if defined(UVM_AMAP_INLINE) || defined(UVM_AMAP_C) 205 #include <uvm/uvm_amap_i.h> 206 #endif 207 208 #include <uvm/uvm_fault_i.h> 209 210 #if defined(UVM_MAP_INLINE) || defined(UVM_MAP_C) 211 #include <uvm/uvm_map_i.h> 212 #endif 213 214 #if defined(UVM_PAGE_INLINE) || defined(UVM_PAGE_C) 215 #include <uvm/uvm_page_i.h> 216 #endif 217 218 #if defined(UVM_PAGER_INLINE) || defined(UVM_PAGER_C) 219 #include <uvm/uvm_pager_i.h> 220 #endif 221 222 #endif /* _KERNEL */ 223 224
Indexes created Sat Sep 27 14:09:57 GMT 2025