uvm.h revision 1.32
1 /* $NetBSD: uvm.h,v 1.32 2002/09/15 01:01:32 thorpej 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 /* anon stuff */ 110 struct vm_anon *afree; /* anon free list */ 111 struct simplelock afreelock; /* lock on anon free list */ 112 113 /* static kernel map entry pool */ 114 struct vm_map_entry *kentry_free; /* free page pool */ 115 struct simplelock kentry_lock; 116 117 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 118 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 119 120 /* swap-related items */ 121 struct simplelock swap_data_lock; 122 123 /* kernel object: to support anonymous pageable kernel memory */ 124 struct uvm_object *kernel_object; 125 }; 126 127 #endif /* _KERNEL */ 128 129 /* 130 * vm_map_entry etype bits: 131 */ 132 133 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 134 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 135 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 136 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 137 138 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 139 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 140 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 141 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 142 143 #ifdef _KERNEL 144 145 /* 146 * holds all the internal UVM data 147 */ 148 extern struct uvm uvm; 149 150 /* 151 * historys 152 */ 153 154 UVMHIST_DECL(maphist); 155 UVMHIST_DECL(pdhist); 156 UVMHIST_DECL(ubchist); 157 158 /* 159 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 160 * interlocked tsleep() function. 161 */ 162 163 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 164 do { \ 165 (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 166 msg, timo, slock); \ 167 } while (0) 168 169 /* 170 * UVM_KICK_PDAEMON: perform checks to determine if we need to 171 * give the pagedaemon a nudge, and do so if necessary. 172 */ 173 174 #define UVM_KICK_PDAEMON() \ 175 do { \ 176 if (uvmexp.free + uvmexp.paging < uvmexp.freemin || \ 177 (uvmexp.free + uvmexp.paging < uvmexp.freetarg && \ 178 uvmexp.inactive < uvmexp.inactarg)) { \ 179 wakeup(&uvm.pagedaemon); \ 180 } \ 181 } while (/*CONSTCOND*/0) 182 183 /* 184 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 185 */ 186 187 #if defined(UVM_PAGE_TRKOWN) 188 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 189 #else 190 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 191 #endif /* UVM_PAGE_TRKOWN */ 192 193 /* 194 * pull in inlines 195 */ 196 197 #include <uvm/uvm_amap_i.h> 198 #include <uvm/uvm_fault_i.h> 199 #include <uvm/uvm_map_i.h> 200 #include <uvm/uvm_page_i.h> 201 #include <uvm/uvm_pager_i.h> 202 203 #endif /* _KERNEL */ 204 205 #endif /* _UVM_UVM_H_ */ 206
Indexes created Sun Sep 28 16:09:52 GMT 2025