1 /* $NetBSD: uvm.h,v 1.66 2015/04/13 22:04:44 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 <sys/rndsource.h> 66 67 /* 68 * pull in VM_NFREELIST 69 */ 70 #include <machine/vmparam.h> 71 72 struct workqueue; 73 74 /* 75 * per-cpu data 76 */ 77 78 struct uvm_cpu { 79 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 80 int page_free_nextcolor; /* next color to allocate from */ 81 int page_idlezero_next; /* which color to zero next */ 82 bool page_idle_zero; /* TRUE if we should try to zero 83 pages in the idle loop */ 84 int pages[PGFL_NQUEUES]; /* total of pages in page_free */ 85 u_int emap_gen; /* emap generation number */ 86 87 krndsource_t rs; /* entropy source */ 88 }; 89 90 /* 91 * uvm structure (vm global state: collected in one structure for ease 92 * of reference...) 93 */ 94 95 struct uvm { 96 /* vm_page related parameters */ 97 98 /* vm_page queues */ 99 struct pgfreelist page_free[VM_NFREELIST]; /* unallocated pages */ 100 bool page_init_done; /* TRUE if uvm_page_init() finished */ 101 102 /* page daemon trigger */ 103 int pagedaemon; /* daemon sleeps on this */ 104 struct lwp *pagedaemon_lwp; /* daemon's lid */ 105 106 /* aiodone daemon */ 107 struct workqueue *aiodone_queue; 108 109 /* aio_done is locked by uvm.pagedaemon_lock and splbio! */ 110 TAILQ_HEAD(, buf) aio_done; /* done async i/o reqs */ 111 112 /* per-cpu data */ 113 struct uvm_cpu *cpus[MAXCPUS]; 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_pageqlock; /* lock for active/inactive page q */ 126 extern kmutex_t uvm_fpageqlock; /* lock for free page q */ 127 extern kmutex_t uvm_kentry_lock; 128 extern kmutex_t uvm_swap_data_lock; 129 130 #endif /* _KERNEL */ 131 132 /* 133 * vm_map_entry etype bits: 134 */ 135 136 #define UVM_ET_OBJ 0x01 /* it is a uvm_object */ 137 #define UVM_ET_SUBMAP 0x02 /* it is a vm_map submap */ 138 #define UVM_ET_COPYONWRITE 0x04 /* copy_on_write */ 139 #define UVM_ET_NEEDSCOPY 0x08 /* needs_copy */ 140 141 #define UVM_ET_ISOBJ(E) (((E)->etype & UVM_ET_OBJ) != 0) 142 #define UVM_ET_ISSUBMAP(E) (((E)->etype & UVM_ET_SUBMAP) != 0) 143 #define UVM_ET_ISCOPYONWRITE(E) (((E)->etype & UVM_ET_COPYONWRITE) != 0) 144 #define UVM_ET_ISNEEDSCOPY(E) (((E)->etype & UVM_ET_NEEDSCOPY) != 0) 145 146 #ifdef _KERNEL 147 148 /* 149 * holds all the internal UVM data 150 */ 151 extern struct uvm uvm; 152 153 /* 154 * historys 155 */ 156 157 #ifdef UVMHIST 158 UVMHIST_DECL(maphist); 159 UVMHIST_DECL(pdhist); 160 UVMHIST_DECL(ubchist); 161 UVMHIST_DECL(loanhist); 162 #endif 163 164 extern struct evcnt uvm_ra_total; 165 extern struct evcnt uvm_ra_hit; 166 extern struct evcnt uvm_ra_miss; 167 168 /* 169 * UVM_UNLOCK_AND_WAIT: atomic unlock+wait... wrapper around the 170 * interlocked tsleep() function. 171 */ 172 173 #define UVM_UNLOCK_AND_WAIT(event, slock, intr, msg, timo) \ 174 do { \ 175 (void) mtsleep(event, PVM | PNORELOCK | (intr ? PCATCH : 0), \ 176 msg, timo, slock); \ 177 } while (/*CONSTCOND*/ 0) 178 179 void uvm_kick_pdaemon(void); 180 181 /* 182 * UVM_PAGE_OWN: track page ownership (only if UVM_PAGE_TRKOWN) 183 */ 184 185 #if defined(UVM_PAGE_TRKOWN) 186 #define UVM_PAGE_OWN(PG, TAG) uvm_page_own(PG, TAG) 187 #else 188 #define UVM_PAGE_OWN(PG, TAG) /* nothing */ 189 #endif /* UVM_PAGE_TRKOWN */ 190 191 #include <uvm/uvm_fault_i.h> 192 193 #endif /* _KERNEL */ 194 195 #endif /* _UVM_UVM_H_ */ 196