uvm.h revision 1.60
1 /* $NetBSD: uvm.h,v 1.60 2011/02/02 15:13:33 chuck Exp $ */ 2 3 /* 4 * Copyright (c) 2010 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * Copyright (c) 1997 Charles D. Cranor and Washington University. 31 * All rights reserved. 32 * 33 * Redistribution and use in source and binary forms, with or without 34 * modification, are permitted provided that the following conditions 35 * are met: 36 * 1. Redistributions of source code must retain the above copyright 37 * notice, this list of conditions and the following disclaimer. 38 * 2. Redistributions in binary form must reproduce the above copyright 39 * notice, this list of conditions and the following disclaimer in the 40 * documentation and/or other materials provided with the distribution. 41 * 42 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 43 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 44 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 45 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 46 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 47 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 48 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 49 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 50 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 51 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 52 * 53 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 54 */ 55 56 #ifndef _UVM_UVM_H_ 57 #define _UVM_UVM_H_ 58 59 #if defined(_KERNEL_OPT) 60 #include "opt_lockdebug.h" 61 #include "opt_multiprocessor.h" 62 #include "opt_uvmhist.h" 63 #include "opt_uvm_page_trkown.h" 64 #endif 65 66 #include <uvm/uvm_extern.h> 67 68 #include <uvm/uvm_stat.h> 69 70 /* 71 * pull in prototypes 72 */ 73 74 #include <uvm/uvm_amap.h> 75 #include <uvm/uvm_aobj.h> 76 #include <uvm/uvm_fault.h> 77 #include <uvm/uvm_glue.h> 78 #include <uvm/uvm_km.h> 79 #include <uvm/uvm_loan.h> 80 #include <uvm/uvm_map.h> 81 #include <uvm/uvm_object.h> 82 #include <uvm/uvm_page.h> 83 #include <uvm/uvm_pager.h> 84 #include <uvm/uvm_pdaemon.h> 85 #include <uvm/uvm_swap.h> 86 87 #ifdef _KERNEL 88 89 /* 90 * pull in VM_NFREELIST 91 */ 92 #include <machine/vmparam.h> 93 94 struct workqueue; 95 96 /* 97 * per-cpu data 98 */ 99 100 struct uvm_cpu { 101 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 102 int page_free_nextcolor; /* next color to allocate from */ 103 int page_idlezero_next; /* which color to zero next */ 104 bool page_idle_zero; /* TRUE if we should try to zero 105 pages in the idle loop */ 106 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 107 u_int emap_gen; /* emap generation number */ 108 }; 109 110 /* 111 * uvm structure (vm global state: collected in one structure for ease 112 * of reference...) 113 */ 114 115 struct uvm { 116 /* vm_page related parameters */ 117 118 /* vm_page queues */ 119 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 120 bool page_init_done; /* TRUE if uvm_page_init() finished */ 121 122 /* page daemon trigger */ 123 int pagedaemon; /* daemon sleeps on this */ 124 struct lwp *pagedaemon_lwp; /* daemon's lid */ 125 126 /* aiodone daemon */ 127 struct workqueue *aiodone_queue; 128 129 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 130 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 131 132 /* per-cpu data */ 133 struct uvm_cpu *cpus[MAXCPUS]; 134 }; 135 136 /* 137 * kernel object: to support anonymous pageable kernel memory 138 */ 139 extern struct uvm_object *uvm_kernel_object; 140 141 /* 142 * locks (made globals for lockstat). 143 */ 144 145 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ 146 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 147 extern kmutex_t uvm_kentry_lock; 148 extern kmutex_t uvm_swap_data_lock; 149 150 #endif /* _KERNEL */ 151 152 /* 153 * vm_map_entry etype bits: 154 */ 155 156 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 157 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 158 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 159 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 160 161 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 162 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 163 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 164 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 165 166 #ifdef _KERNEL 167 168 /* 169 * holds all the internal UVM data 170 */ 171 extern struct uvm uvm; 172 173 /* 174 * historys 175 */ 176 177 #ifdef UVMHIST 178 UVMHIST_DECL(maphist); 179 UVMHIST_DECL(pdhist); 180 UVMHIST_DECL(ubchist); 181 UVMHIST_DECL(loanhist); 182 #endif 183 184 extern struct evcnt uvm_ra_total; 185 extern struct evcnt uvm_ra_hit; 186 extern struct evcnt uvm_ra_miss; 187 188 /* 189 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 190 * interlocked tsleep() function. 191 */ 192 193 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 194 do { \ 195 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 196 msg, timo, slock); \ 197 } while (/*CONSTCOND*/ 0) 198 199 void uvm_kick_pdaemon(void); 200 201 /* 202 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 203 */ 204 205 #if defined(UVM_PAGE_TRKOWN) 206 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 207 #else 208 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 209 #endif /* UVM_PAGE_TRKOWN */ 210 211 #include <uvm/uvm_fault_i.h> 212 213 #endif /* _KERNEL */ 214 215 #endif /* _UVM_UVM_H_ */ 216
Indexes created Wed Oct 22 13:09:56 GMT 2025