1 /* $NetBSD: uvm.h,v 1.78 2023/07/17 12:55:37 riastradh 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 67 /* 68 * pull in VM_NFREELIST 69 */ 70 #include <machine/vmparam.h> 71 72 struct workqueue; 73 struct pgflcache; 74 75 /* 76 * per-cpu data 77 */ 78 79 struct uvm_cpu { 80 /* allocator */ 81 struct pgflcache *pgflcache[VM_NFREELIST];/* cpu-local cached pages */ 82 void *pgflcachemem; /* pointer to allocated mem */ 83 size_t pgflcachememsz; /* size of allocated memory */ 84 u_int pgflcolor; /* next color to allocate */ 85 u_int pgflbucket; /* where to send our pages */ 86 87 /* uvmpdpol: queue of intended page status changes. */ 88 struct vm_page **pdq; /* queue entries */ 89 u_int pdqhead; /* current queue head */ 90 u_int pdqtail; /* maximum number entries */ 91 int pdqtime; /* last time queue cleared */ 92 }; 93 94 /* 95 * uvm structure (vm global state: collected in one structure for ease 96 * of reference...) 97 */ 98 99 struct uvm { 100 /* vm_page related parameters */ 101 102 /* vm_page queues */ 103 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 104 u_int bucketcount; 105 bool page_init_done; /* true if uvm_page_init() finished */ 106 107 /* page daemon trigger */ 108 int pagedaemon; /* daemon sleeps on this */ 109 struct lwp *pagedaemon_lwp; /* daemon's lid */ 110 }; 111 112 /* 113 * kernel object: to support anonymous pageable kernel memory 114 */ 115 extern struct uvm_object *uvm_kernel_object; 116 117 /* 118 * locks (made globals for lockstat). 119 */ 120 121 extern kmutex_t uvm_kentry_lock; 122 123 #endif /* _KERNEL */ 124 125 /* 126 * vm_map_entry etype bits: 127 */ 128 129 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 130 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 131 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 132 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 133 134 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 135 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 136 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 137 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 138 139 #ifdef _KERNEL 140 141 /* 142 * holds all the internal UVM data 143 */ 144 extern struct uvm uvm; 145 146 /* 147 * historys 148 */ 149 150 #ifdef UVMHIST 151 UVMHIST_DECL(maphist); 152 UVMHIST_DECL(pdhist); 153 UVMHIST_DECL(ubchist); 154 UVMHIST_DECL(loanhist); 155 #endif 156 157 extern struct evcnt uvm_ra_total; 158 extern struct evcnt uvm_ra_hit; 159 extern struct evcnt uvm_ra_miss; 160 161 /* 162 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 163 * interlocked tsleep() function. 164 */ 165 166 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 167 do { \ 168 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 169 msg, timo, slock); \ 170 } while (/*CONSTCOND*/ 0) 171 172 void uvm_kick_pdaemon(void); 173 174 /* 175 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 176 */ 177 178 #if defined(UVM_PAGE_TRKOWN) 179 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 180 #else 181 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 182 #endif /* UVM_PAGE_TRKOWN */ 183 184 #include <uvm/uvm_fault_i.h> 185 186 #endif /* _KERNEL */ 187 188 #endif /* _UVM_UVM_H_ */ 189