uvm.h revision 1.77
1 /* $NetBSD: uvm.h,v 1.77 2020/05/17 15:11:57 ad 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 #include <uvm/uvm_physseg.h> 66 #include <sys/rndsource.h> 67 68 /* 69 * pull in VM_NFREELIST 70 */ 71 #include <machine/vmparam.h> 72 73 struct workqueue; 74 struct pgflcache; 75 76 /* 77 * per-cpu data 78 */ 79 80 struct uvm_cpu { 81 /* allocator */ 82 struct pgflcache *pgflcache[VM_NFREELIST];/* cpu-local cached pages */ 83 void *pgflcachemem; /* pointer to allocated mem */ 84 size_t pgflcachememsz; /* size of allocated memory */ 85 u_int pgflcolor; /* next color to allocate */ 86 u_int pgflbucket; /* where to send our pages */ 87 88 /* entropy */ 89 krndsource_t rs; /* entropy source */ 90 91 /* uvmpdpol: queue of intended page status changes. */ 92 struct vm_page **pdq; /* queue entries */ 93 u_int pdqhead; /* current queue head */ 94 u_int pdqtail; /* maximum number entries */ 95 int pdqtime; /* last time queue cleared */ 96 }; 97 98 /* 99 * uvm structure (vm global state: collected in one structure for ease 100 * of reference...) 101 */ 102 103 struct uvm { 104 /* vm_page related parameters */ 105 106 /* vm_page queues */ 107 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 108 u_int bucketcount; 109 bool page_init_done; /* true if uvm_page_init() finished */ 110 111 /* page daemon trigger */ 112 int pagedaemon; /* daemon sleeps on this */ 113 struct lwp *pagedaemon_lwp; /* daemon's lid */ 114 }; 115 116 /* 117 * kernel object: to support anonymous pageable kernel memory 118 */ 119 extern struct uvm_object *uvm_kernel_object; 120 121 /* 122 * locks (made globals for lockstat). 123 */ 124 125 extern kmutex_t uvm_kentry_lock; 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 #ifdef UVMHIST 155 UVMHIST_DECL(maphist); 156 UVMHIST_DECL(pdhist); 157 UVMHIST_DECL(ubchist); 158 UVMHIST_DECL(loanhist); 159 #endif 160 161 extern struct evcnt uvm_ra_total; 162 extern struct evcnt uvm_ra_hit; 163 extern struct evcnt uvm_ra_miss; 164 165 /* 166 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 167 * interlocked tsleep() function. 168 */ 169 170 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 171 do { \ 172 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 173 msg, timo, slock); \ 174 } while (/*CONSTCOND*/ 0) 175 176 void uvm_kick_pdaemon(void); 177 178 /* 179 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 180 */ 181 182 #if defined(UVM_PAGE_TRKOWN) 183 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 184 #else 185 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 186 #endif /* UVM_PAGE_TRKOWN */ 187 188 #include <uvm/uvm_fault_i.h> 189 190 #endif /* _KERNEL */ 191 192 #endif /* _UVM_UVM_H_ */ 193
Indexes created Thu Oct 23 22:10:10 GMT 2025