uvm.h revision 1.62.4.4
1 /* $NetBSD: uvm.h,v 1.62.4.4 2011/12/26 16:03:10 yamt Exp $ */ 2 3 /* 4 * Copyright (c) 1997 Charles D. Cranor and Washington University. 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 AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 * 27 * from: Id: uvm.h,v 1.1.2.14 1998/02/02 20:07:19 chuck Exp 28 */ 29 30 #ifndef _UVM_UVM_H_ 31 #define _UVM_UVM_H_ 32 33 #if defined(_KERNEL_OPT) 34 #include "opt_lockdebug.h" 35 #include "opt_multiprocessor.h" 36 #include "opt_uvmhist.h" 37 #include "opt_uvm_page_trkown.h" 38 #endif 39 40 #include <uvm/uvm_extern.h> 41 42 #ifdef _KERNEL 43 #include <uvm/uvm_stat.h> 44 #endif 45 46 /* 47 * pull in prototypes 48 */ 49 50 #include <uvm/uvm_amap.h> 51 #include <uvm/uvm_aobj.h> 52 #include <uvm/uvm_fault.h> 53 #include <uvm/uvm_glue.h> 54 #include <uvm/uvm_km.h> 55 #include <uvm/uvm_loan.h> 56 #include <uvm/uvm_map.h> 57 #include <uvm/uvm_object.h> 58 #include <uvm/uvm_page.h> 59 #include <uvm/uvm_pager.h> 60 #include <uvm/uvm_pdaemon.h> 61 #include <uvm/uvm_swap.h> 62 63 #ifdef _KERNEL 64 65 /* 66 * pull in VM_NFREELIST 67 */ 68 #include <machine/vmparam.h> 69 70 struct workqueue; 71 72 /* 73 * per-cpu data 74 */ 75 76 struct uvm_cpu { 77 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 78 int page_free_nextcolor; /* next color to allocate from */ 79 int page_idlezero_next; /* which color to zero next */ 80 bool page_idle_zero; /* TRUE if we should try to zero 81 pages in the idle loop */ 82 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 83 u_int emap_gen; /* emap generation number */ 84 85 /* 86 * pagestate 87 * [0] non-anonymous 88 * [1] anonymous (PQ_SWAPBACKED) 89 */ 90 int64_t pagestate[2][UVM_PAGE_NUM_STATUS]; 91 92 int64_t loan_obj; /* O->K loan */ 93 int64_t unloan_obj; /* O->K unloan */ 94 int64_t loanbreak_obj; /* O->K loan resolved on write to O */ 95 int64_t loanfree_obj; /* O->K loan resolved on free of O */ 96 97 int64_t loan_anon; /* A->K loan */ 98 int64_t unloan_anon; /* A->K unloan */ 99 int64_t loanbreak_anon; /* A->K loan resolved on write to A */ 100 int64_t loanfree_anon; /* A->K loan resolved on free of A */ 101 102 int64_t loan_oa; /* O->A->K loan */ 103 int64_t unloan_oa; /* O->A->K unloan */ 104 105 int64_t loan_zero; /* O->K loan (zero) */ 106 int64_t unloan_zero; /* O->K unloan (zero) */ 107 108 int64_t loanbreak_orphaned; /* O->A->K loan turned into A->K loan due to 109 write to O */ 110 int64_t loanfree_orphaned; /* O->A->K loan turned into A->K loan due to 111 free of O */ 112 int64_t loanbreak_orphaned_anon; /* O->A->K loan turned into O->K loan 113 due to write to A */ 114 int64_t loanfree_orphaned_anon; /* O->A->K loan turned into O->K loan 115 due to free of A */ 116 117 int64_t loanbreak_oa_obj; /* O->A loan resolved on write to O */ 118 int64_t loanfree_oa_obj; /* O->A loan resolved on free of O */ 119 int64_t loanbreak_oa_anon; /* O->A loan resolved on write to A */ 120 int64_t loanfree_oa_anon; /* O->A loan resolved on free of A */ 121 int64_t loan_resolve_orphan; /* O->A loaned page taken over by anon */ 122 int64_t loan_obj_read; /* O->A loan for read(2) */ 123 }; 124 125 /* 126 * uvm structure (vm global state: collected in one structure for ease 127 * of reference...) 128 */ 129 130 struct uvm { 131 /* vm_page related parameters */ 132 133 /* vm_page queues */ 134 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 135 bool page_init_done; /* TRUE if uvm_page_init() finished */ 136 137 /* page daemon trigger */ 138 int pagedaemon; /* daemon sleeps on this */ 139 struct lwp *pagedaemon_lwp; /* daemon's lid */ 140 141 /* aiodone daemon */ 142 struct workqueue *aiodone_queue; 143 144 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 145 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 146 147 /* per-cpu data */ 148 struct uvm_cpu *cpus[MAXCPUS]; 149 }; 150 151 /* 152 * kernel object: to support anonymous pageable kernel memory 153 */ 154 extern struct uvm_object *uvm_kernel_object; 155 156 /* 157 * locks (made globals for lockstat). 158 */ 159 160 extern kmutex_t uvm_pageqlock; /* lock for active/inactive page q */ 161 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 162 extern kmutex_t uvm_kentry_lock; 163 extern kmutex_t uvm_swap_data_lock; 164 165 #endif /* _KERNEL */ 166 167 /* 168 * vm_map_entry etype bits: 169 */ 170 171 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 172 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 173 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 174 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 175 176 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 177 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 178 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 179 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 180 181 #ifdef _KERNEL 182 183 /* 184 * holds all the internal UVM data 185 */ 186 extern struct uvm uvm; 187 188 /* 189 * historys 190 */ 191 192 #ifdef UVMHIST 193 UVMHIST_DECL(maphist); 194 UVMHIST_DECL(pdhist); 195 UVMHIST_DECL(ubchist); 196 UVMHIST_DECL(loanhist); 197 #endif 198 199 extern struct evcnt uvm_ra_total; 200 extern struct evcnt uvm_ra_hit; 201 extern struct evcnt uvm_ra_miss; 202 203 /* 204 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 205 * interlocked tsleep() function. 206 */ 207 208 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 209 do { \ 210 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 211 msg, timo, slock); \ 212 } while (/*CONSTCOND*/ 0) 213 214 void uvm_kick_pdaemon(void); 215 216 /* 217 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 218 */ 219 220 #if defined(UVM_PAGE_TRKOWN) 221 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 222 #else 223 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 224 #endif /* UVM_PAGE_TRKOWN */ 225 226 #include <uvm/uvm_fault_i.h> 227 228 #endif /* _KERNEL */ 229 230 #endif /* _UVM_UVM_H_ */ 231
Indexes created Wed Oct 22 06:10:02 GMT 2025