uvm.h revision 1.52
1 /* $NetBSD: uvm.h,v 1.52 2007/07/21 19:21:53 ad 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 struct workqueue; 75 76 /* 77 * uvm structure (vm global state: collected in one structure for ease 78 * of reference...) 79 */ 80 81 struct uvm { 82 /* vm_page related parameters */ 83 84 /* vm_page queues */ 85 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 86 int page_free_nextcolor; /* next color to allocate from */ 87 struct simplelock pageqlock; /* lock for active/inactive page q */ 88 bool page_init_done; /* TRUE if uvm_page_init() finished */ 89 bool page_idle_zero; /* TRUE if we should try to zero 90 pages in the idle loop */ 91 92 /* page daemon trigger */ 93 int pagedaemon; /* daemon sleeps on this */ 94 struct lwp *pagedaemon_lwp; /* daemon's lid */ 95 96 /* aiodone daemon */ 97 struct workqueue *aiodone_queue; 98 99 /* page hash */ 100 struct pglist *page_hash; /* page hash table (vp/off->page) */ 101 int page_nhash; /* number of buckets */ 102 int page_hashmask; /* hash mask */ 103 104 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 105 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 106 107 /* swap-related items */ 108 bool swap_running; 109 kcondvar_t scheduler_cv; 110 bool scheduler_kicked; 111 int swapout_enabled; 112 }; 113 114 /* 115 * kernel object: to support anonymous pageable kernel memory 116 */ 117 extern struct uvm_object *uvm_kernel_object; 118 119 /* 120 * locks (made globals for lockstat). 121 */ 122 123 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 124 extern kmutex_t uvm_pagedaemon_lock; 125 extern kmutex_t uvm_kentry_lock; 126 extern kmutex_t uvm_swap_data_lock; 127 extern kmutex_t uvm_scheduler_mutex; 128 129 #endif /* _KERNEL */ 130 131 /* 132 * vm_map_entry etype bits: 133 */ 134 135 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 136 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 137 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 138 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 139 140 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 141 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 142 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 143 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 144 145 #ifdef _KERNEL 146 147 /* 148 * holds all the internal UVM data 149 */ 150 extern struct uvm uvm; 151 152 /* 153 * historys 154 */ 155 156 #ifdef UVMHIST 157 UVMHIST_DECL(maphist); 158 UVMHIST_DECL(pdhist); 159 UVMHIST_DECL(ubchist); 160 UVMHIST_DECL(loanhist); 161 #endif 162 163 extern struct evcnt uvm_ra_total; 164 extern struct evcnt uvm_ra_hit; 165 extern struct evcnt uvm_ra_miss; 166 167 /* 168 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 169 * interlocked tsleep() function. 170 */ 171 172 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 173 do { \ 174 (void) ltsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 175 msg, timo, slock); \ 176 } while (/*CONSTCOND*/ 0) 177 178 void uvm_kick_pdaemon(void); 179 180 /* 181 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 182 */ 183 184 #if defined(UVM_PAGE_TRKOWN) 185 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 186 #else 187 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 188 #endif /* UVM_PAGE_TRKOWN */ 189 190 #include <uvm/uvm_fault_i.h> 191 192 #endif /* _KERNEL */ 193 194 #endif /* _UVM_UVM_H_ */ 195
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